# Patent

## Title
Hard surface cleaning composition

## Abstract

The present invention relates to a hard surface cleaning composition comprising a copolymer, wherein said copolymer comprises a zwitterionic unit A or a mixture thereof and another unit B or a mixture thereof, wherein said unit A comprises a betaine group or a mixture thereof and wherein said betaine group of said unit A is a sulphobetaine group or a mixture thereof, and wherein said unit B is derived from vinyl-pyrrolidone.

## Background
FIELD OF THE INVENTION
The present invention relates to a composition for cleaning a hard surface and a process of cleaning a hard surface with such a composition. The hard surface cleaning composition herein comprises a specific copolymer as defined herein below.
BACKGROUND OF THE INVENTION
Compositions for cleaning hard surfaces are well known in the art. Manufacturers of such hard surface cleaning compositions are continuously searching for new components that will improve the effectiveness of the compositions. The present invention relates to a new ingredient for use in cleaning of hard surfaces such as floors, tiles, work surfaces, ceramic surfaces, windows, blinds, shades, mirrors, household appliances, etc.
In hard surface cleaning applications, the resulting appearance of the hard surface after the hard surface cleaning is of high relevance. Indeed, such a hard surface cleaning application has not only to provide a clean surface but the hard surface should also not show any visible filming and/or streaking. Linked thereto, the hard surface should have a shiny appearance. In addition, providing the hard surface with soil repellency properties, meaning the prevention or at least reduction of deposition of soil after an initial cleaning operation, is a desired property. Moreover, providing a next time cleaning benefit, wherein the subsequent cleaning of an initially cleaned surface is facilitated, is desire. There is also the need to provide a fast-drying benefit on inclined or vertical hard surfaces.
With regard to currently marketed hard surface cleaning compositions, it has been found that the performance with regard to filming and/or streaking as well as to shine of such compositions used in hard surface cleaning applications may still be further improved. Furthermore, it has been found that the performance with regard to soil repellency and next time cleaning of such compositions used in hard surface cleaning applications may also still be further improved. Moreover, it has been found that their performance with regard to fast-drying on inclined or vertical hard surfaces may also still be further improved.
Thus, the objective of the present invention is to provide a hard surface cleaning composition exhibiting good filming and/or streaking performance, good shine performance, good soil repellency performance, good next time cleaning benefit performance and/or good fast-drying performance on inclined or vertical hard surfaces.
It has now been found that this objective can be met by a hard surface cleaning composition as described herein as well as a process of cleaning a hard surface as described herein.
Advantageously, the composition and process as described herein provide good cleaning performance.
A further advantage of the present invention is that the composition and process herein may be used to clean hard surfaces made of a variety of materials like glazed and non-glazed ceramic tiles, enamel, stainless steel, Inox®, Formica®, vinyl, no-wax vinyl, linoleum, melamine, glass, plastics and plastified wood.
SUMMARY OF THE INVENTION
The present invention relates to a hard surface cleaning composition comprising a copolymer as described herein below.
In one embodiment, the present invention encompasses a process of cleaning a hard surface with a hard surface cleaning composition according to the present invention.
In another alternative embodiment, the present invention also encompasses the use of a copolymer as described herein in a process of cleaning a hard surface with a liquid composition comprising said copolymer, wherein good filming and/or streaking and/or shine and/or good soil repellency and/or good next time cleaning benefit and/or good fast-drying performance on inclined or vertical surfaces is achieved.


DETAILED DESCRIPTION OF THE INVENTION
Hard Surface Cleaning Composition
The composition herein may be either a liquid composition or a solid composition. Liquid compositions include gels, pastes, thickened liquid compositions as well as compositions having a water-like viscosity. Solid compositions herein include powders, pellets, bars, and the like. Furthermore, the composition herein may also be a unit-dose hard surface cleaning composition such as a tablet or a water soluble pouch comprising one or more compartments filled with a liquid or a solid composition or a combination thereof. In one embodiment according to the present invention, the hard surface cleaning composition herein is a liquid hard surface cleaning composition.
One embodiment of a liquid hard surface cleaning composition herein may be an aqueous, liquid hard surface cleaning composition comprising water in an amount from 50% to 98%, alternatively from 75% to 97%, alternatively 80% to 97% by weight of the total composition.
Suitable liquid hard surface cleaning composition herein have a viscosity of 1 cps or greater, alternatively from 1 to 20000 cps, alternatively from 1 to 500 cps at 20° C. when measured with a CSL2 100® Rheometer at 20° C. with a 4 cm spindle (linear increment from 10 to 100 dyne/cm2 in 2 minutes).
The pH of the liquid hard surface cleaning composition according to the present invention may typically be from 0 to 14.
In another embodiment, the pH of the liquid hard surface cleaning composition herein is from 7 to 14, alternatively from 7.1 to 14, alternatively from 7.1 to 13, alternatively from 7.1 to 12, alternatively from 8.0 to 10. Indeed, it has been surprisingly found that the greasy cleaning performance is further improved at these alkaline to neutral pH ranges, alternatively alkaline pH ranges. Accordingly, the liquid hard surface cleaning composition herein may further comprise an acid or base (as described herein below) to adjust pH as appropriate, alternatively a base.
In another embodiment, the pH of the liquid hard surface cleaning composition herein is from 0 to 7, alternatively from 0 to 6.9, alternatively from 1 to 6, alternatively from 2 to 5, alternatively from pH 3 to 5. Indeed, it has been surprisingly found that cleaning performance, especially on limescale-containing soils, such as limescale and/or hard water marks or greasy soap scum, is further improved at these acidic to neutral pH ranges, alternatively acidic pH ranges. Accordingly, the liquid hard surface cleaning composition herein may further comprise an acid or base (as described herein below) to adjust pH as appropriate, alternatively an acid.
In another embodiment herein, wherein the hard surface cleaning composition herein is a solid composition or contains a solid component (such as for water soluble pouches containing at least one solid component), the solid hard surface cleaning composition herein may further comprise an acid or base (as described herein below) to adjust the pH.
A suitable acid for use herein is an organic and/or an inorganic acid. An organic acid for use herein has a pKa of less than 6. A suitable organic acid is selected from the group consisting of citric acid, lactic acid, glycolic acid, succinic acid, glutaric acid and adipic acid and a mixture thereof. A mixture of said acids may be commercially available from BASF under the trade name Sokalan® DCS. A suitable inorganic acid is selected from the group consisting hydrochloric acid, sulphuric acid, phosphoric acid and a mixture thereof.
A typical level of such an acid, when present, is of from 0.01% to 5.0%, alternatively from 0.04% to 3.0%, alternatively from 0.05% to 1.5% by weight of the total composition.
A suitable base to be used herein is an organic and/or inorganic base. Suitable bases for use herein are the caustic alkalis, such as sodium hydroxide, potassium hydroxide and/or lithium hydroxide, and/or the alkali metal oxides such, as sodium and/or potassium oxide or mixtures thereof. In one embodiment the base may be a caustic alkali, alternatively sodium hydroxide and/or potassium hydroxide.
Other suitable bases include ammonia, ammonium carbonate, K2CO3, Na2CO3 and alkanolamines (as e.g. monoethanolamine or triethanolamine).
Typical levels of such bases, when present, are of from 0.01% to 5.0%, alternatively from 0.05% to 3.0%, alternatively from 0.1% to 0.6% by weight of the total composition.
Process of Cleaning a Hard Surface
The present invention encompasses a process of cleaning a hard surface with a composition according to the present invention. In one embodiment, the process of cleaning a hard surface herein involves the use of the hard surface cleaning composition according to the present invention in liquid form. By “in liquid form” it is meant herein, the liquid hard surface cleaning composition (as described herein above) either in its neat or diluted form (see herein below) or the solid or unit-dose hard surface cleaning composition (both as described herein above) in dissolved form.
In one embodiment said hard surface is contacted with the hard surface cleaning composition according to the present invention.
By “hard surface”, it is meant herein any kind of surface typically found in houses like kitchens, bathrooms, e.g., floors, walls, tiles, windows, cupboards, sinks, showers, shower plastified curtains, wash basins, WCs, fixtures and fittings and the like made of different materials like ceramic, vinyl, no-wax vinyl, linoleum, melamine, glass, Inox®, Formica®, any plastics, plastified wood, metal or any painted or varnished or sealed surface and the like. Hard surfaces also include household appliances including, but not limited to refrigerators, freezers, washing machines, automatic dryers, ovens, microwave ovens, dishwashers and so on. Such hard surfaces may be found both in private households as well as in commercial, institutional and industrial environments.
Furthermore, hard surfaces herein also include hard surfaces of cars and other automotive vehicles.
It is understood that the present invention does not encompass cleaning compositions for dishware and thus the hard surface cleaning compositions herein do not encompass dishwashing compositions and the process of cleaning hard surfaces herein does not encompass dishwashing. Indeed, hard surfaces herein do not encompass dishware.
In one embodiment according to the present invention, the hard surface to be cleaned in the process herein is selected from the group consisting of ceramic, glass, enamel, stainless steel, chromed surfaces and Formica®. Alternatively, the hard surface to be cleaned in the process herein is selected from the group consisting of bathroom hard surfaces, alternatively selected from the group consisting of: ceramic, glass, enamel, stainless steel and chromed surfaces.
In one embodiment of the present invention, said hard surface is inclined or vertical. Inclined or vertical hard surfaces include mirrors, lavatory pans, urinals, drains, side wall of bathtubs and shower stalls, waste pipes and the like. Such inclined or vertical surfaces can often be found in bathrooms.
An embodiment of the present invention provides that a liquid hard surface cleaning composition is applied onto the surface to be treated. The composition may be in its neat form or in its diluted form.
By “diluted form”, it is meant herein that said liquid composition is diluted by the user typically with water. The liquid composition is diluted prior to use to a typical dilution level of 10 to 400 times its weight of water, alternatively from 10 to 200, alternatively from 10 to 100. A usually recommended dilution level is a 1.5% dilution of the composition in water.
By “in its neat form”, it is to be understood that said liquid composition is applied directly onto the surface to be treated without undergoing any dilution, i.e., the liquid composition herein is applied onto the hard surface as described herein.
An alternative embodiment of the present invention provides that a solid or unit-dose hard surface cleaning composition is applied onto the surface to be treated. The composition is in its dissolved form.
By “dissolved form”, it is meant herein that said solid or unit-dose hard surface cleaning composition is dissolved by the user typically in water. The solid or unit-dose hard surface cleaning composition is dissolved prior to use to a typical dissolution level of 10 to 400 times its weight in water, alternatively from 10 to 200 and alternatively from 10 to 100. A usually recommended dissolution level is 1.5% dissolution by weight of the composition in water.
In the process herein, the hard surface cleaning composition herein is applied onto said surface by conventional means known by the skilled person. Indeed, the composition herein may be applied by pouring or spraying said composition, alternatively in liquid form, onto said surface. In one embodiment, the process of cleaning a hard surface herein includes the steps of applying, alternatively spraying, said hard surface cleaning composition, alternatively in liquid form, onto said hard surface, leaving said hard surface cleaning composition to act onto said surface for a period of time to allow said composition to act, alternatively without applying mechanical action, and optionally removing said hard surface cleaning composition, alternatively removing said hard surface cleaning composition by rinsing said hard surface with water and/or wiping said hard surface with an appropriate instrument, e.g., a sponge, a paper or cloth towel and the like.
In another embodiment of the present invention, the liquid hard surface cleaning composition herein is sprayed onto said hard surface. Alternatively, said liquid hard surface cleaning composition is sprayed in its neat form onto said hard surface.
In another process of cleaning a hard surface according to the present invention, said hard surface cleaning composition is applied onto said surface in diluted form without rinsing the hard-surface after application in order to obtain good soil/stain removal performance.
Alternatively, the hard surface cleaning composition herein may be applied using an appropriate implement, such as a mop or a cloth, soaked in the diluted composition herein. Furthermore, once applied onto said surface said composition may be agitated over said surface using an appropriate implement. Indeed, said surface may be wiped using a mop or a cloth. During such a cleaning operation parts of the composition herein may be captured in the cleaning implement, if any, (alternatively in combination with soil initially present on the surface) and transferred into a bucket or another suitable receptacle (squeezing of the mop or cloth), another part of the composition will be left on the surface after the cleaning operation. Indeed, the composition is, alternatively at least partially, left on said surface at the end of said process of cleaning said hard surface, alternatively left on said surface until the next cleaning operation, alternatively at least partially left on said surface until the next cleaning operation. In one embodiment, the composition is applied onto said surface in diluted form without rinsing said hard surface after application. Indeed, the composition is (at least partially) left to dry on said hard surface. However, the hard surface cleaned with the process according to the present invention may eventually be rinsed during a subsequent cleaning process. Furthermore, due to normal use of the hard surfaces cleaned by the process herein, said hard surfaces may eventually be wetted, by for example by spilling water or other liquids onto said surface. Such subsequent cleaning processes or the accidental wetting of the hard surface shall not be considered as rinsing of the surface within the meaning of the present invention. Moreover, the removal of parts of the composition applied onto the hard surface during the cleaning, e.g., be means of squeezing soiled composition out of a mop or cloth shall not be considered as rinsing of the surface within the meaning of the present invention
By “rinsing”, it is meant herein contacting the hard surface cleaned with the process according to the present invention with substantial quantities of appropriate solvent, typically water, directly after the step of applying the liquid composition herein onto said hard surface. By “substantial quantities”, it is meant herein between 0.01 lt. and 1 lt. of water per m2 of hard surface, alternatively between 0.1 lt. and 1 lt. of water per m2 of hard surface.
The hard surfaces to be treated may be soiled with a variety of soils, e.g., greasy soils (e.g., greasy soap scum, body grease, kitchen grease or burnt/sticky food residues typically found in a kitchen and the like), particulate greasy soils or so called “limescale-containing stains”. By “limescale-containing stains” it is meant herein any pure limescale stains, i.e., any stains composed essentially of mineral deposits, as well as limescale-containing stains, i.e., stains which contain not only mineral deposits like calcium and/or magnesium carbonate but also soap scum (e.g., calcium stearate) and other grease (e.g. body grease).
In an alternative embodiment herein, the liquid hard surface cleaning composition herein is impregnated onto a substrate, alternatively a nonwoven substrate, to form a premoistened hard surface cleaning wipe. Indeed, the process of cleaning a hard surface according to the present invention comprises the steps of contacting a premoistened hard surface cleaning wipe comprising the liquid hard surface cleaning composition herein impregnated onto a substrate with said hard surface wiping said hard surface with said wipe.
Copolymer
By “a sulphobetaine group” it is meant herein, a group comprising an anionic group and a cationic group, with at least one of the groups containing a sulphur atom.
By “unit derived from a monomer” it is meant herein, the different units of the Aprecursor units, to denote a unit which may be obtained directly from said monomer through polymerisation. Indeed, a unit deriving from an acrylic or methacrylic acid ester does not cover a unit with formula —CH2—CH(COOH)—, —CH2—C(CH3)(COOH)—, —CH2—CH(OH)—, respectively, obtained by polymerizing an acrylic or methacrylic acid ester or a vinyl acetate ester respectively, then hydrolyzing, for example. A unit deriving from acrylic or methacrylic acid covers, for example, a unit obtained by polymerizing a monomer (for example an acrylic or methacrylic acid ester), then making the obtained polymer react (for example by hydrolysis) so as to obtain units with formula —CH2—CH(COOH)—, or —CH2—C(CH3)(COOH)—. A unit deriving from a vinyl alcohol covers, for example, a unit obtained by polymerizing a monomer (for example a vinyl ester), then making the obtained polymer react (for example by hydrolysis) so as to obtain units with formula —CH2—CH(OH)—. Units deriving from an A monomer may have been obtained, for example, through polymerisation of Aprecursor monomers, then post-polymerisation reaction to obtain units comprising the betaine group. The A units are not considered units deriving from Aprecursor monomers not containing the betaine group.
By “molar mass” it is meant herein unless otherwise stated, the average molar mass in absolute mass, expressed in g/mol. This can be determined by permeation chromatography of aqueous gel (GPC), by light diffusion (DDL or MALLS for an aqueous solvent), with an aqueous solvent or an organic solvent (for example formamide), according to the composition of the polymer.
Unless otherwise stated, the quantities and proportions herein are indicated in active matter (as opposed to diluted or dispersed matter) and in weight.
The copolymer according to the present invention comprises a zwitterionic unit A or a mixture thereof, and another unit B or a mixture thereof, with the unit A comprises a betaine group or a mixture thereof characterised by:

    
    
        the betaine group of the unit A being a sulphobetaine group or a mixture thereof, and
        the units B being units derived from vinyl-pyrrolidone.
    
    


It alternatively involves a statistical copolymer. In one embodiment according to the present invention, the units A, B, as well as possibly with other optional units, form a polyalkylene hydrocarbon chain possibly broken by one or more nitrogen or sulphur atoms.
Units A Containing a Sulphobetaine Group
The betaine group of the units A contains an anionic group and a cationic group, with at least one of the groups containing a sulphur atom. The anionic group may be a carbonate group, a sulphuric group such as a sulphonate group, a phosphorus group such as a phosphate, phosphonate, phosphinate group, or an ethanolate group. It is alternatively a sulphuric group. The cationic group may be an onium or inium group from the nitrogen, phosphate or sulphur family, for example an ammonium, pyridinium, imidazolinimum, phosphonium or sulphonium group. It is alternatively an ammonium group (alternatively quaternary). Alternatively, the betaine group is a sulphobetaine group containing a sulphonate group and a quaternary ammonium group. The present invention encompasses copolymers containing different betaine groups as units A in the copolymer.
The betaine groups are typically the pendant groups of the copolymer, typically obtained from monomers containing at least one ethylene non-saturation.
At the core of the units A, the number of positive charges is equal to the number of negative charges. The units A are electrically neutral, in at least one pH range.
Useful betaine groups may be represented, in case of cations from the nitrogen family, by the following formulae (I) to (IV), having a cationic charge at the centre of the function and an anionic charge at the end of the function:

—N(+)(R1)(R2)—R-A-O(−)   (I)

—(R3)C═N(+)(R4)—R-A-O(−)   (II)

—(R3)(R)C—N(+)(R4)(R5)—R-A-O(−)   (III)

—N(+)(═R6)—R-A-O(−)   (IV)

wherein:

    
    
        R1, R2 and R5, are similar or different, and represent an alkyl radical containing 1 to 7 carbon atoms, alternatively 1 to 2.
        R3 et R4, are similar or different, and represent hydrocarbon radicals forming, with the nitrogen atom, a nitrogen heterocycle comprising possibly one or more other heteroatoms, alternatively nitrogen
        R6 represents a hydrocarbon radical forming, with the nitrogen atom, a saturated or unsaturated nitrogen heterocycle, comprising possibly one or more other heteroatoms, alternatively nitrogen.
        R represents a linear or branched alkylene radical comprising 1 to 15 carbon atoms, alternatively 2 to 4, possibly substituted by one or more hydroxy groups, or a benzylene radical,
        A represents S(═O)(═O).
    
    


Useful betaine groups may be represented, in case of cations from the phosphorus family, are represented by formula (VI):

—P(+)(R1)(R2)—R-A-O(−)   (VI)

    
    
        wherein R1, R2, R and A have the definition stated above.
    
    


Useful betaine groups may be represented, in case of cations from the sulphur family, are represented by formulae (VIII) and (IX):

—S(+)(R1)—R-A-O(−)   (VIII)

—R-A′(—O(−))—R—S(+)(R1)(R2)   (IX)

wherein for formula (VIII):

    
    
        R1 and R have the definition stated above,
        A represents S(═O)(═O), OP(═O)(═O), OP(═O)(OR′), P(═O)(OR′) or P(═O)(R′),
        R represents an alkyl radical containing 1 to 7 carbon atoms or a phenyl radical or wherein for formula (IX):
        R1, R2 and R have the definition stated above, and
        A′ represents —O—P(═O)—O—.
    
    


The betaine groups may be connected to the carbon atoms of a macromolecular chain derived from the polymerisation of an ethylene non-saturation (dorsal, skeleton) of the copolymer by the intermediary, namely of a bivalent or polyvalent hydrocarbon pattern (for example alkylene or arylene), possibly broken by one or several heteroatoms, namely of oxygen or nitrogen, an ester pattern, an amide pattern, or even by a valency link.
The copolymer herein may be obtained by radical polymerisation: of monomers A comprising an ethylenically unsaturated betaine group, namely of ethylenically unsaturated monomers containing at least one betaine group with the above formulae, and vinyl pyrrolidone, from which the unit B derives.
Said monomers A are for example:

    
    
        one or more mono- or poly-ethylenically unsaturated hydrocarbon radicals (namely vinyl, allyl, styrenyl, and the like),
        one or more mono- or poly-ethylenically unsaturated ester radicals (namely acrylate, methacrylate, maleate, and the like) and/or
        one or more mono- or poly-ethylenically unsaturated amide radicals (namely acrylamido, methacrylamido, and the like)
    
    


The units A may derive from at least one betaine monomer A selected from group consisting of the following monomers:

    
    
        alkylsulphonates of dialkylammonium alkyl acrylates or methacrylates, acrylamido or methacrylamido, such as:
        sulphopropyl dimethyl ammonium ethyl methacrylate, marketed by RASCHIG under the name SPE:
    
    






    
    
        sulphoethyl dimethyl ammonium ethyl methacrylate and sulphobutyl dimethyl ammonium ethyl methacrylate:
    
    






    
    
         whose synthesis is described in the article “Sulfobetaine Zwitterionomers based on n-butyl acrylate and 2-Ethoxyethyl acrylate: monomer synthesis and copolymerization behaviour”, Journal of Polymer Science 40, 511-523 (2002);
        sulfohydroxypropyl dimethyl ammonium ethyl methacrylate:
    
    






    
    
        sulphopropyl dimethylammonium propyl acrylamide:
    
    






    
    
         whose synthesis is described in the article “Synthesis and solubility of the poly(sulfobetaine)s and the corresponding cationic polymers: 1. Synthesis and characterization of sulphobetaines and the corresponding cationic monomers by nuclear magnetic resonance spectra”, Wen-Fu Lee and Chan-Chang Tsai, Polymer, 35 (10), 2210-2217 (1994),
        sulphopropyl dimethylammonium propyl methacrylamide, marketed by RASCHIG under the name SPP:
    
    






    
    
        sulphopropyl dimethylammonium ethyl methacrylate, marketed by RASCHIG under the name SPDA:
    
    






    
    
        sulphohydroxypropyl dimethyl ammonium propyl methacrylamido:
    
    






    
    
        sulphopropyl diethyl ammonium ethyl methacrylate:
    
    






    
    
         whose synthesis is described in the article “Poly(sulphopropylbetaines): 1. Synthesis and characterization”, V. M. Monroy Soto and J. C. Galin, Polymer, 1984, Vol 25, 121-128,
        sulphohydroxypropyl diethyl ammonium ethyl methacrylate:
    
    






    
    
        heterocyclic betaine monomers, such as:
        sulphobetaines derived from piperazine:
    
    






    
    
         whose synthesis is described in the article “Hydrophobically Modified Zwitterionic Polymers: Synthesis, Bulk Properties, and Miscibility with Inorganic Salts”, P. Koberle and A. Laschewsky, Macromolecules 27, 2165-2173 (1994),
        sulphobetaines derived from 2-vinylpyridine and 4-vinylpyridine, such as:
        the 2-vinyl(3-sulphopropyl)pyridinium betaine (2SPV or “SPV”), marketed by RASCHIG under the name SPV,
    
    






    
    
        the 4-vinyl(3-sulphopropyl)pyridinium betaine (4SPV) whose synthesis is described in the article “Evidence of ionic aggregates in some ampholytic polymers by transmission electron microscopy”, V. M. Castaño and A. E. González, J. Cardoso, O. Manero and V. M. Monroy, J. Mater. Res., 5 (3), 654-657 (1990):
    
    






    
    
        the 1-vinyl-3-(3-sulphopropyl)imidazolium betaine:
    
    






whose synthesis is described in the article “Aqueous solution properties of a poly(vinyl imidazolium sulphobetaine)”, J. C. Salamone, W. Volkson, A. P. Oison, S. C. Israel, Polymer, 19, 1157-1162 (1978)

    
    
        alkylsulphonates of dialkylammonium alkyl allyl, such as sulphopropyl methyl diallyl ammonium betaine:
    
    






    
    
         whose synthesis is described in the article “New poly(carbobetaine)s made from zwitterionic diallylammonium monomers”, Favresse, Philippe; Laschewsky, Andre, Macromolecular Chemistry and Physics, 200(4), 887-895 (1999),
        styrene alkylsulphonates of dialkylammonium alkyl, such as:
    
    






    
    
         whose synthesis is described in the article “Hydrophobically Modified Zwitterionic Polymers: Synthesis, Bulk Properties, and Miscibility with Inorganic Salts”, P. Koberle and A. Laschewsky, Macromolecules 27, 2165-2173 (1994),
        betaines from dienes and ethylenically unsaturated anhydrides, such as:
    
    






    
    
         whose synthesis is described in the article “Hydrophobically Modified Zwitterionic Polymers: Synthesis, Bulk Properties, and Miscibility with Inorganic Salts”, P. Koberle and A. Laschewsky, Macromolecules 27, 2165-2173 (1994),
        betaines from cyclic acetals, alternatively ((dicyanoethanolate)ethoxy)dimethyl ammonium propyl methacrylamide.
    
    


The copolymer according to the present invention, can also be obtained in a known method by chemically modifying a polymer (copolymer) called precursor polymer, containing the Aprecursor units, which are modified (botanized) by a post-polymerisation reaction to achieve the units A being a betaine group. Sulphobetaine units can thus be obtained by chemically modifying precursor polymer units, alternatively by chemically modifying a polymer containing pendant amine functions, with the help of a sulphuric electrophile compound, alternatively a sultone (propanesultone, butanesultone), or a halogenoalkylsulphonate.
Some synthesis examples are given below:




The main access paths through chemical modification of the precursor polymer by the sultones and the halogenoalkylsulphonates are described in the following documents:

    
    
        “Synthesis and aqueous solution behavior of copolymers containing sulfobetaine moieties in side chains”, I. V. Berlinova, I. V. Dimitrov, R. G. Kalinova, N. G. Vladimirov, Polymer 41, 831-837 (2000),
        “Poly(sulfobetaine)s and corresponding cationic polymers: 3. Synthesis and dilute aqueous solution properties of poly(sulfobetaine)s derived from styrene-maleic anhydride)”, Wen-Fu Lee and Chun-Hsiung Lee, Polymer 38 (4), 971-979 (1997),
        “Poly(sulfobetaine)s and corresponding cationic polymers. VIII. Synthesis and aqueous solution properties of a cationic poly(methyl iodide quaternized styrene-N,N-dimethylaminopropyl maleamidic acid) copolymer”, Lee, Wen-Fu; Chen, Yan-Ming, Journal of Applied Polymer Science 80, 1619-1626 (2001),
        “Synthesis of polybetaines with narrow molecular mass distribution and controlled architecture”, Andrew B. Lowe, Norman C. Billingham and Steven P. Armes, Chem. Commun., 1555-1556 (1996),
        “Synthesis and Properties of Low-Polydispersity Poly(sulfopropylbetaine)s and Their Block Copolymers”, Andrew B. Lowe, Norman C. Billingham, and Steven P. Armes, Macromolecules 32, 2141-2146 (1999),
        Japanese patent application published on Dec. 21, 1999, under number 11-349826.
    
    


According to one method, the units A are selected from the group consisting of:







Units B
The units B are units derived from vinyl-pyrrolidone. Such monomers are known in the art. Alternatively unit B is N-vinyl-pyrrolidone.
The copolymer according to the present invention may comprise optional units Cother, different from units A and B mentioned herein above. Units A and B may represent 1% to 100%, alternatively 50 to 100%, alternatively 75 to 100% in moles of the total copolymer units.
According to one embodiment herein, the copolymer according to the present invention comprises:

    
    
        1 to 25% in moles of units A, alternatively 3 to 13% and
        75 to 99% in moles of units B, alternatively 87 to 97%.
    
    


According to another embodiment herein, the molar ratio between the units A and B is between 1/99 and 25/75, alternatively between 5/95 and 15/85.
As stated above, the copolymer herein may contain for units Cother:

    
    
        non-ionic, hydrophilic or hydrophobic CN units, and/or
        anionic or potentially anionic CA units, and/or
        cationic or potentially cationic CC units.
    
    


According to one embodiment herein the copolymer herein does not comprise more than 25% in moles for the total of such units Cother, alternatively none at all. According to another embodiment herein the copolymer herein does not comprise more than 25% in moles for the total CN units, alternatively none at all. According to another embodiment herein the copolymer herein does not comprise more than 25% in moles for the total CA units, alternatively none at all. According to another embodiment herein the copolymer herein does not comprise more than 25% in moles for the total CC units, alternatively none at all.
According to one embodiment herein the copolymer herein is substantially devoid (i.e., it comprises less than 1% in moles, alternatively less than 0.5%, alternatively none at all) of the following units:

    
    
        CC units and/or
        CN units chosen from
        alkoxylated units with the following formula:

—CH2—CHR6[—X2—(CH2—CH2—O)n—R7]—

wherein:

        R6 is a hydrogen atom or a methyl group,
        X2 is a group with the formula —CO—O—, —CO—NH— or —C6H4—CH2—
        n is the entire or average number greater than or equal to 1,
        R7 is a hydrogen atom, an alkyl group or a tristyrylphenyl group, and/or
        hydroxyl units with the following formula:

—CH2—CHR6[—X2—R8]—

wherein:

        R6 is a hydrogen atom or a methyl group,
        X2 is a group with the formula —CO—O—, —CO—NH— or —C6H4—CH2—
        R8 is a hydrocarbon group with at least two carbon atoms, comprising at least 2 —OH groups, alternatively on two consecutive carbon atoms, and/or
        hydroxyalkyl acrylate or methacrylate units.
        hydrophobic CN units.
    
    


It is understood that the copolymer herein may be in any practical form, for example in solid or dry form, or for example in the form of a solution, emulsion, suspension or dispersion, namely in the form of an aqueous solution. The solution, emulsion, suspension or dispersion form, for example, the aqueous solution, may comprise 5 to 50% in the copolymer weight, for example 10 to 30% in weight. The aqueous solution may, in fact, be a solution obtained by a preparation process in an aqueous phase, namely a radical polymerisation process.
The polymer herein may have a molar mass going from 20000 g/mol to 1000000 g/mol, alternatively from 100000 to 400000 g/mol.
Copolymer Preparation Process
The copolymer according to the present may be prepared by any suitable process. The process generally involves a radical polymerisation (copolymerization) step, where monomers and a free radicals source are introduced.
According to another embodiment herein, a mixture of Aprecursor and vinyl-pyrrolidone monomers are polymerized (copolymerization) in the presence of a free radicals source to obtain a copolymer comprising units B and units deriving from the Aprecursor units. These units are then chemically modified to obtain units A (post polymerisation modification). The modifications are mentioned above, in the section detailing the A units.
According to one embodiment herein, the process involves a copolymerization step by introducing:

    
    
        a monomer A (or Aprecursor), comprising an ethylenically unsaturated group and a sulphobetaine group,
        vinyl-pyrrolidone, and
        a free radicals source.
    
    


Such radical polymerisation processes are known in the art and by the skilled person. It is possible to vary, in particular, the free radicals source, the amount of free radicals, the phases for introducing the different compounds (monomers, free radicals source etc. . . . ), the polymerisation temperature, and other operating parameters or conditions in a known and suitable way. Some details and instructions are provided herein below.
The processes may be discontinuous (“batch”), semi-continuous (“semi-batch”) or even continuous. A semi-continuous process typically involves a phase of progressive introduction of at least one monomer (co-monomer), alternatively all monomers (co-monomers) into a reactor, without continuously removing the reaction product. This product, containing the polymer, is collected all at once after the reaction.
Advantageously, polymerisation can be done in an aqueous solution.
Any free radicals source may be used. Free radicals can be generated spontaneously, for example by raising the temperature, with suitable monomers like styrene. Free radicals can be generated by irradiation, namely UV irradiation, alternatively in the presence of suitable initiators sensitive to UV. Initiators (or “igniters”) or redox or radical initiator systems can be used. The free radicals source can be water-soluble or non water-soluble. Alternatively water-soluble, or at least partially water-soluble, initiators (for example water-soluble to at least 50% in weight) are used.
Generally, the greater the amount of free radicals, the easier it is to initiate polymerisation, but the lower the molecular masses of the copolymers obtained.
It is possible to use the following initiators:

    
    
        hydrogen peroxides, such as: 3-butyl hydroperoxide, cumene hydroperoxide, -t-butyl-peroxyacetate, t-butyl-peroxybenzoate, t-butylperoxyoctoate, t-butylperoxyneodecanoate, t-butylperoxyisobutarate, lauroyl peroxide, t-amylperoxypivalte, t-butylperoxypivalate, dicumyl peroxide, benzoyl peroxide, potassium persulphate, ammonium persulphate,
        azo compounds, such as: 2-2′-azobis(isobutyronitrile), 2,2′-azobis(2-butanenitrile), 4,4′-azobis(4-pentanoic acid), 1,1′-azobis(cyclohexane-carbonitrile), 2-(t-butylazo)-2-cyanopropane, 2,2′-azobis[2-methyl-N-(1,1)-bis(hydroxymethyl)-2-hydroxyethyl]propionamide, 2,2′-azobis(2-methyl-N-hydroxyethyl]-propionamide, 2,2′-azobis(N,N′-dimethyleneisobutyramidine)dichloride, 2,2′-azobis(2-amidinopropane)dichloride, 2,2′-azobis (N,N′-dimethyleneisobutyramide), 2,2′-azobis(2-methyl-N-[1,1-bis(hydroxymethyl)-2-hydroxyethyl]propionamide), 2,2′-azobis(2-methyl-N-[1,1-bis(hydroxymethyl)ethyl]propionamide), 2,2′-azobis[2-methyl-N-(2-hydroxyethyl)propionamide], 2,2′-azobis(isobutyramide)dihydrate,
        redox systems containing combinations such as:
        mixtures of hydrogen or alkyl peroxide, peresters, percarbonates and similar, and any of the iron salts, titanium salts, zinc formaldehyde sulphoxylate or sodium formaldehyde sulphoxylate, and reducing sugars,
        persulphates, perborates or perchlorates of alkaline metals or ammonium in association with a alkaline metal bisulphite, such as sodium metabisulphite, and reducing sugars, and
        alkaline metal persulphates in association with an arylphosphinic acid, such as benzene phosphonic acid and similar, and reducing sugars.
    
    


The polymerisation temperature may be between 25° C. and 95° C. and may depend on the free radicals source. If it does not involve a UV initiator source, it is preferable to operate between 50° C. and 95° C., alternatively between 60° C. and 80° C. In general, the higher the temperature, the easier it is to initiate polymerisation, but the lower the molecular masses of the copolymers obtained.
In the composition of the present invention, the copolymer herein is alternatively present at a level of from 0.001% to 10%, alternatively from 0.005% to 1%, alternatively from 0.01% to 0.5% by weight of the hard surface cleaning composition.
It has been found that the presence of the specific copolymer according to the present invention in a hard surface cleaning composition used to clean a hard surface allows to provide improved filming and/or streaking performance and linked thereto improved shine performance as compared to the use in the same hard surface cleaning application of a composition that is free of the copolymer herein. Furthermore, it has been found that the presence of the specific copolymer according to the present invention in a hard surface cleaning composition used to clean a hard surface allows to provide improved soil repellency properties to the hard surface after an initial cleaning operation with the compositions according to the present invention. Moreover, it has been found that the presence of the specific copolymer according to the present invention in a hard surface cleaning composition used to clean a hard surface allows to provide improved next time cleaning benefit properties to the hard surface after an initial cleaning operation with the compositions according to the present invention. In addition, it has been found that the presence of the specific copolymer according to the present invention in a hard surface cleaning composition used to clean a hard surface allows to provide fast-drying benefit properties on inclined or vertical surfaces as compared to the use in the same hard surface cleaning application of a composition that is free of the copolymer herein.
After cleaning a hard surface, residues may be left on the hard surface cleaned. Indeed, due to the fact that the cleaning composition applied onto the surface is not or only partially rinsed off the surface or removed from the surface (e.g., wiped off), the cleaning composition (partially or completely) along with a part of the soil present on the hard surface is left on the surface (another part of the soil is captured in the implement (e.g., mop), if any used). Such residues often lead to visible films and/or streaks on the cleaned hard surface and may impair the shine of the hard surface. Moreover, cleaned surfaces are prone to re-soiling due to their normal use. Indeed, marks, soils, stains and the like of various kinds are deposited on hard surface upon use (e.g., soil carried onto a floor sticking the bottom of shoes).
It has surprisingly been found that the inclusion of said copolymer in a hard surface cleaning composition used in a hard surface cleaning application provides a composition that increases the transparency of the residues (after drying) left on the hard surface after cleaning. Such an increase in transparency results in the residues being less or even not at all visible, which in turns significantly contributes to the fact that films and/or streaks are barely or even not at all visible on the cleaned hard surface and also to an improved shine of the cleaned hard surface. Furthermore, it has surprisingly been found that on a hard surface initially cleaned with the hard surface cleaning compositions herein using, soils deposition is reduced or even prevented. Indeed, so-called soil repellency properties are observed. In addition, it has surprisingly been found that on a hard surface initially cleaned with the hard surface cleaning compositions herein us, a next time cleaning benefit is observed. Indeed, subsequent cleaning operations of an initially cleaned surface are facilitated. Furthermore, it has surprisingly been found that the inclusion of said copolymer in a hard surface cleaning composition used in a hard surface cleaning application provides fast-drying benefit properties on inclined or vertical surfaces.
Therefore, in one embodiment, the present invention encompasses the use of a copolymer as described herein in a process of cleaning a hard surface with a liquid composition comprising said copolymer, wherein good filming and/or streaking and/or shine (alternatively upon rinsing with water) and/or good soil repellency and/or good next time cleaning benefit and/or good fast-drying performance (alternatively upon rinsing with water) on inclined or vertical surfaces is achieved.
It has been found that the soil repellence benefit and/or the next time cleaning benefit as described herein, is particularly beneficial on greasy soap scum soils that is mostly observed in a bathroom environment (e.g., as residues in bathtubs or shower stalls). Therefore, in one embodiment according to the present invention, the hard surface cleaning composition herein is an acidic to neutral, alternatively acidic, hard surface cleaning composition, alternatively used to clean bathroom hard surfaces (as described herein above). The pH range and bathroom hard surfaces also apply to the claimed use, as described herein above.
Filming/Streaking and Shine Test Method
The filming/streaking and shine performance of a hard surface cleaning composition is evaluated using the following tests method:
The hard surface cleaning composition is diluted to a 1.2% level (detergent solution) in normal tap-water, if needed adjusted with CaCl2 to achieve a particular water hardness of interest, mostly 16 gpg. 19 g (+/−0.2 g) of said detergent solution is applied on a Vileda® cloth (20 cm*9 cm), followed by wiping lightly covering a surface of four black glossy ceramic tiles (20*25 cm each), wherein approx. 1 g. (+/−0.2 g) of detergent solution is left on the tile. Afterwards the tile is left to dry without rinsing at constant temperature (22° C.) and constant humidity (30-40% rH).
The shine performance is evaluated by visual assessment of a tile being cleaned with a wash solution containing polymer, versus a tile being cleaned with the same wash solution though not containing the polymer.
The filming/streaking and/or shine performance of said composition can be assessed by visual grading. The visual grading may be performed by a group of expert panellists using panel score units (PSU). To assess the filming/streaking and/or shine performance of a given composition a PSU-scale ranging from 0, meaning a poor filming/streaking and/or shine impression (i.e., visible filing/streaking; no shine) of the given composition, to 6, meaning a good filming/streaking and/or shine impression (i.e., no visible filing/streaking; excellent shine) of the given composition, can be applied.
Drying and Shine Test Method Upon Neat Cleaning
The drying and shine performance under neat hard surface cleaning conditions is evaluated using the following tests method:
3 ml of hard surface cleaning composition to be assessed is applied neat onto black glossy ceramic tiles (20*25 cm each), followed by wiping lightly with a dry Vileda® cloth (20 cm*9 cm) to spread the product uniformly. The product is left to act for 15 seconds, then the tile (in vertical position) is rinsed with tap water for 30 second (water flow approx. 4 liters per minute). The tile is left to dry at constant temperature (22° C.) and constant humidity (30-40% rH).
The drying time is measured, and the shine performance of said composition can be assessed by visual grading as described herein above.
Soil Repellency and Next Time Cleaning Benefit Test Method
The next time cleaning/soil repellency performance of a hard surface cleaning composition is evaluated using the following tests method:
A clean white ceramic tile (ex Villeroy & Bosch® UT01 Series Unit 1—dimensions 7*25 cm) is pretreated with test and reference products to be assessed by using a “Wet Abrasian Scrub Tester—Ref. 903PG/SA/B, available from Sheen Instruments Limited), a straight-line washability machine having 4 cleaning tracks and 4 sponge holders. Two cleaning tracks are preconditioned with a wet sponge (yellow cellulose sponge, Type 7 ex Spontex US—total weight wet sponge=22 g+/−2 g) to which 20 ml (+/−0.2 ml) of a 1.2% detergent solution (see above for preparation) is added, the two other cleaning tracks are preconditioned with a wet sponge containing 20 ml (+/−0.2 ml) of a 1.2% wash solution of a reference detergent solution. The tile is pretreated over 20 cycles, followed by allowing the tile to dry at constant temperature (25° C.) and humidity (70% rH) for at least 2 hours, alternatively overnight.
A soil mix of polymerized oil and particulate soil is prepared and 0.085 g of the soil mix is homogeneously distributed over the pretreated tile. After application, the soiled tile is left to condition for 3-5 hours, alternatively overnight, at constant temperature (25° C.) and humidity (70% rH).
To cross-evaluate the cleaning performance of the test versus reference detergent solution, the number of counts is recorded to fully clean the pretreated tile areas by a sponge containing 20 ml (+/−0.2 ml) of the corresponding 1.2% detergent solution, using the “Wet Abrasian Scrub Tester” as mentioned above.
Optional Composition Ingredients
The hard surface cleaning compositions according to the present invention may comprise a variety of optional ingredients depending on the technical benefit aimed for and the surface treated.
Suitable optional ingredients for use herein include surfactants, builders, chelants, polymers, buffers, bactericides, preservatives, hydrotropes, colorants, stabilisers, radical scavengers, bleaches, bleach activators, enzymes, soil suspenders, dye transfer agents, brighteners, anti dusting agents, dispersants, dye transfer inhibitors, pigments, silicones, perfumes and/or dyes.
Surfactants
The compositions herein may comprise a nonionic, anionic, zwitterionic and amphoteric surfactant or mixtures thereof. Said surfactant is alternatively present at a level of from 0.01% to 20% of composition herein. Suitable surfactants are those selected from the group consisting of nonionic, anionic, zwitterionic and amphoteric surfactants, having hydrophobic chains containing from 8 to 18 carbon atoms. Examples of suitable surfactants are described in McCutcheon's Vol. 1: Emulsifiers and Detergents, North American Ed., McCutcheon Division, MC Publishing Co., 2002.
Alternatively, the hard surface cleaning composition herein comprises from 0.01% to 20%, alternatively from 0.5% to 10%, and alternatively from 1% to 5% by weight of the total composition of a surfactant or a mixture thereof.
Non-ionic surfactants may be used in the compositions of the present invention. Non-limiting examples of suitable non-ionic surfactants include alcohol alkoxylates, alkyl polysaccharides, amine oxides, block copolymers of ethylene oxide and propylene oxide, fluoro surfactants and silicon based surfactants. Alternatively, the aqueous compositions comprise from 0.01% to 20%, alternatively from 0.5% to 10%, alternatively from 1% to 5% by weight of the total composition of a non-ionic surfactant or a mixture thereof.
A class of non-ionic surfactants suitable for the present invention is alkyl ethoxylates. The alkyl ethoxylates of the present invention are either linear or branched, and contain from 8 carbon atoms to 16 carbon atoms in the hydrophobic tail, and from 3 ethylene oxide units to 25 ethylene oxide units in the hydrophilic head group. Examples of alkyl ethoxylates include Neodol 91-6®, Neodol 91-8® supplied by the Shell Corporation (P.O. Box 2463, 1 Shell Plaza, Houston, Tex.), and Alfonic 810-60® supplied by Condea Corporation, (900 Threadneedle P.O. Box 19029, Houston, Tex.). Alkyl ethoxylates may comprise from 9 to 12 carbon atoms in the hydrophobic tail, and from 4 to 9 oxide units in the hydrophilic head group. An alkyl ethoxylate is C9-11 EO5, available from the Shell Chemical Company under the tradename Neodol 91-5®. Non-ionic ethoxylates can also be derived from branched alcohols. For example, alcohols can be made from branched olefin feedstocks such as propylene or butylene. In one embodiment, the branched alcohol is either a 2-propyl-1-heptyl alcohol or 2-butyl-1-octyl alcohol. A desirable branched alcohol ethoxylate is 2-propyl-1-heptyl EO7/AO7, manufactured and sold by BASF Corporation under the tradename Lutensol XP 79/XL 79®.
Another class of non-ionic surfactant suitable for the present invention is alkyl polysaccharides. Such surfactants are disclosed in U.S. Pat. Nos. 4,565,647, 5,776,872, 5,883,062, and 5,906,973. Among alkyl polysaccharides, alkyl polyglycosides comprising five and/or six carbon sugar rings may be used, alternatively those comprising six carbon sugar rings are may be used, alternatively those wherein the six carbon sugar ring is derived from glucose, i.e., alkyl polyglucosides (“APG”) may be used. The alkyl substituent in the APG chain length is alternatively a saturated or unsaturated alkyl moiety containing from 8 to 16 carbon atoms, with an average chain length of 10 carbon atoms. C8-C16 alkyl polyglucosides are commercially available from several suppliers (e.g., Simusol® surfactants from Seppic Corporation, 75 Quai d'Orsay, 75321 Paris, Cedex 7, France, and Glucopon 220®, Glucopon 225®, Glucopon 425®, Plantaren 2000 N®, and Plantaren 2000 N UP®, from Cognis Corporation, Postfach 13 01 64, D 40551, Dusseldorf, Germany).
Another class of non-ionic surfactant suitable for the present invention is amine oxide. Amine oxides, particularly those comprising from 10 carbon atoms to 16 carbon atoms in the hydrophobic tail, are beneficial because of their strong cleaning profile and effectiveness even at levels below 0.10%. Additionally C10-16 amine oxides, especially C12-C14 amine oxides are excellent solubilizers of perfume. Alternative non-ionic detergent surfactants for use herein are alkoxylated alcohols generally comprising from 8 to 16 carbon atoms in the hydrophobic alkyl chain of the alcohol. Typical alkoxylation groups are propoxy groups or ethoxy groups in combination with propoxy groups, yielding alkyl ethoxy propoxylates. Such compounds are commercially available under the tradename Antarox® available from Rhodia (40 Rue de la Haie-Coq F-93306, Aubervilliers Cédex, France) and under the tradename Nonidet® available from Shell Chemical.
Also suitable for use in the present invention are the fluorinated nonionic surfactants. One particularly suitable fluorinated nonionic surfactant is Fluorad F170 (3M Corporation, 3M Center, St. Paul, Minn., USA). Fluorad F170 has the formula C8F17SO2N(CH2-CH3)(CH2CH2O)x. Also suitable for use in the present invention are silicon-based surfactants. One example of these types of surfactants is Silwet L7604 available from Dow Chemical (1691 N. Swede Road, Midland, Mich., USA).
The condensation products of ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol are also suitable for use herein. The hydrophobic portion of these compounds will alternatively have a molecular weight of from 1500 to 1800 and will exhibit water insolubility. The addition of polyoxyethylene moieties to this hydrophobic portion tends to increase the water solubility of the molecule as a whole, and the liquid character of the product is retained up to the point where the polyoxyethylene content is about 50% of the total weight of the condensation product, which corresponds to condensation with up to 40 moles of ethylene oxide. Examples of compounds of this type include certain of the commercially available Pluronic® surfactants, marketed by BASF. Chemically, such surfactants have the structure (EO)x(PO)y(EO)z or (PO)x(EO)y(PO)z wherein x, y, and z are from 1 to 100, alternatively 3 to 50. Pluronic® surfactants known to be good wetting surfactants may be used. A description of the Pluronic® surfactants, and properties thereof, including wetting properties, can be found in the brochure entitled “BASF Performance Chemicals Plutonic® & Tetronic® Surfactants”, available from BASF.
Other suitable non-ionic surfactants include the polyethylene oxide condensates of alkyl phenols, e.g., the condensation products of alkyl phenols having an alkyl group containing from 6 to 12 carbon atoms in either a straight chain or branched chain configuration, with ethylene oxide, the said ethylene oxide being present in amounts equal to 5 to 25 moles of ethylene oxide per mole of alkyl phenol. The alkyl substituent in such compounds can be derived from oligomerized propylene, diisobutylene, or from other sources of iso-octane n-octane, iso-nonane or n-nonane. Other non-ionic surfactants that can be used include those derived from natural sources such as sugars and include C8-C16 N-alkyl glucose amide surfactants.
Suitable anionic surfactants for use herein are all those commonly known by those skilled in the art. Alternatively, the anionic surfactants for use herein include alkyl sulphonates, alkyl aryl sulphonates, alkyl sulphates, alkyl alkoxylated sulphates, C6-C20 alkyl alkoxylated linear or branched diphenyl oxide disulphonates, or mixtures thereof.
Suitable alkyl sulphonates for use herein include water-soluble salts or acids of the formula RSO3M wherein R is a C6-C20 linear or branched, saturated or unsaturated alkyl group, alternatively a C8-C18 alkyl group and alternatively a C10-C16 alkyl group, and M is H or a cation, e.g., an alkali metal cation (e.g., sodium, potassium, lithium), or ammonium or substituted ammonium (e.g., methyl-, dimethyl-, and trimethyl ammonium cations and quaternary ammonium cations, such as tetramethyl-ammonium and dimethyl piperdinium cations and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures thereof, and the like).
Suitable alkyl aryl sulphonates for use herein include water-soluble salts or acids of the formula RSO3M wherein R is an aryl, alternatively a benzyl, substituted by a C6-C20 linear or branched saturated or unsaturated alkyl group, alternatively a C8-C18 alkyl group, alternatively a C10-C16 alkyl group, and M is H or a cation, e.g., an alkali metal cation (e.g., sodium, potassium, lithium, calcium, magnesium and the like) or ammonium or substituted ammonium (e.g., methyl-, dimethyl-, and trimethyl ammonium cations and quaternary ammonium cations, such as tetramethyl-ammonium and dimethyl piperdinium cations and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures thereof, and the like).
An example of a C14-C16 alkyl sulphonate is Hostapur® SAS available from Hoechst. An example of commercially available alkyl aryl sulphonate is Lauryl aryl sulphonate from Su.Ma. In one embodiment, the alkyl aryl sulphonates are alkyl benzene sulphonates commercially available under trade name Nansa® available from Albright&Wilson.
Suitable alkyl sulphate surfactants for use herein are according to the formula R1SO4M wherein R1 represents a hydrocarbon group selected from the group consisting of straight or branched alkyl radicals containing from 6 to 20 carbon atoms and alkyl phenyl radicals containing from 6 to 18 carbon atoms in the alkyl group. M is H or a cation, e.g., an alkali metal cation (e.g., sodium, potassium, lithium, calcium, magnesium and the like) or ammonium or substituted ammonium (e.g., methyl-, dimethyl-, and trimethyl ammonium cations and quaternary ammonium cations, such as tetramethyl-ammonium and dimethyl piperdinium cations and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures thereof, and the like).
In one embodiment, the branched alkyl sulphates to be used herein are those containing from 10 to 14 total carbon atoms like Isalchem 123 AS®. Isalchem 123 AS® commercially available from Enichem is a C12-13 surfactant which is 94% branched. This material can be described as CH3—(CH2)m—CH(CH2OSO3Na)—(CH2)m—CH3 where n+m=8−9. In another embodiment, the alkyl sulphates are the alkyl sulphates where the alkyl chain comprises a total of 12 carbon atoms, i.e., sodium 2-butyl octyl sulphate. Such alkyl sulphate is commercially available from Condea under the trade name Isofol® 12S. Suitable liner alkyl sulphonates include C12-C16 paraffin sulphonate like Hostapur® SAS commercially available from Hoechst.
Suitable alkyl alkoxylated sulphate surfactants for use herein are according to the formula RO(A)mSO3M wherein R is an unsubstituted C6-C20 alkyl or hydroxyalkyl group having a C6-C20 alkyl component, alternatively a C12-C20 alkyl or hydroxyalkyl, alternatively C12-C18 alkyl or hydroxyalkyl, A is an ethoxy or propoxy unit, m is greater than zero, typically between 0.5 and 6, alternatively between 0.5 and 3, and M is H or a cation which can be, for example, a metal cation (e.g., sodium, potassium, lithium, calcium, magnesium, etc.), ammonium or substituted-ammonium cation. Alkyl ethoxylated sulfates as well as alkyl propoxylated sulfates are contemplated herein. Specific examples of substituted ammonium cations include methyl-, dimethyl-, trimethyl-ammonium and quaternary ammonium cations, such as tetramethyl-ammonium, dimethyl piperdinium and cations derived from alkanolamines such as ethylamine, diethylamine, triethylamine, mixtures thereof, and the like. Exemplary surfactants are C12-C18 alkyl polyethoxylate (1.0) sulfate (C12-C18E(1.0)SM), C12-C18 alkyl polyethoxylate (2.25) sulfate (C12-C18E(2.25)SM), C12-C18 alkyl polyethoxylate (3.0) sulfate (C12-C18E(3.0)SM), and C12-C18 alkyl polyethoxylate (4.0) sulfate (C12-C18E(4.0)SM), wherein M is conveniently selected from sodium and potassium.
Suitable C6-C20 alkyl alkoxylated linear or branched diphenyl oxide disulphonate surfactants for use herein are according to the following formula:




wherein R is a C6-C20 linear or branched, saturated or unsaturated alkyl group, alternatively a C12-C18 alkyl group, alternatively a C14-C16 alkyl group, and X+ is H or a cation, e.g., an alkali metal cation (e.g., sodium, potassium, lithium, calcium, magnesium and the like). Particularly suitable C6-C20 alkyl alkoxylated linear or branched diphenyl oxide disulphonate surfactants to be used herein are the C12 branched di phenyl oxide disulphonic acid and C16 linear di phenyl oxide disulphonate sodium salt respectively commercially available by DOW under the trade name Dowfax 2A1® and Dowfax 8390®.

Other anionic surfactants useful herein include salts (including, for example, sodium, potassium, ammonium, and substituted ammonium salts such as mono-, di- and triethanolamine salts) of soap, C8-C24 olefinsulfonates, sulphonated polycarboxylic acids prepared by sulphonation of the pyrolyzed product of alkaline earth metal citrates, e.g., as described in British patent specification No. 1,082,179, C8-C24 alkylpolyglycolethersulfates (containing up to 10 moles of ethylene oxide); alkyl ester sulfonates such as C14-16 methyl ester sulfonates; acyl glycerol sulfonates, fatty oleyl glycerol sulfates, alkyl phenol ethylene oxide ether sulfates, alkyl phosphates, isethionates such as the acyl isethionates, N-acyl taurates, alkyl succinamates and sulfosuccinates, monoesters of sulfosuccinate (especially saturated and unsaturated C12-C18 monoesters) diesters of sulfosuccinate (especially saturated and unsaturated C6-C14 diesters), acyl sarcosinates, sulfates of alkylpolysaccharides such as the sulfates of alkylpolyglucoside (the nonionic nonsulfated compounds being described below), alkyl polyethoxy carboxylates such as those of the formula RO(CH2CH2O)kCH2COO—M+ wherein R is a C8-C22 alkyl, k is an integer from 0 to 10, and M is a soluble salt-forming cation. Resin acids and hydrogenated resin acids are also suitable, such as rosin, hydrogenated rosin, and resin acids and hydrogenated resin acids present in or derived from tall oil. Further examples are given in “Surface Active Agents and Detergents” (Vol. I and II by Schwartz, Perry and Berch). A variety of such surfactants are also generally disclosed in U.S. Pat. No. 3,929,678, issued Dec. 30, 1975 to Laughlin, et al. at Column 23, line 58 through Column 29, line 23.
Zwitterionic surfactants represent another class of surfactants within the context of the present invention. Zwitterionic surfactants contain both cationic and anionic groups on the same molecule over a wide pH range. The typical cationic group is a quaternary ammonium group, although other positively charged groups like sulfonium and phosphonium groups can also be used. The typical anionic groups are carboxylates and sulfonates, alternatively sulfonates, although other groups like sulfates, phosphates and the like, can be used. Some common examples of these detergents are described in the patent literature: U.S. Pat. Nos. 2,082,275, 2,702,279 and 2,255,082.
A specific example of a zwitterionic surfactant is 3-(N-dodecyl-N,N-dimethyl)-2-hydroxypropane-1-sulfonate (Lauryl hydroxyl sultaine) available from the McIntyre Company (24601 Governors Highway, University Park, Ill. 60466, USA) under the tradename Mackam LHS®. Another specific zwitterionic surfactant is C12-14 acylamidopropylene (hydroxypropylene) sulfobetaine that is available from McIntyre under the tradename Mackam 50-SB®. Other very useful zwitterionic surfactants include hydrocarbyl, e.g., fatty alkylene betaines. Another zwitterionic surfactant is Empigen BB®, a coco dimethyl betaine produced by Albright & Wilson. Another zwitterionic surfactant is Mackam 35HP®, a coco amido propyl betaine produced by McIntyre.
Another class of surfactants comprises the group consisting of amphoteric surfactants. One suitable amphoteric surfactant is a C8-C16 amido alkylene glycinate surfactant (‘ampho glycinate’). Another suitable amphoteric surfactant is a C8-C16 amido alkylene propionate surfactant (‘ampho propionate’). Other suitable, amphoteric surfactants are represented by surfactants such as dodecylbeta-alanine, N-alkyltaurines such as the one prepared by reacting dodecylarnine with sodium isethionate according to the teaching of U.S. Pat. No. 2,658,072, N-higher alkylaspartic acids such as those produced according to the teaching of U.S. Pat. No. 2,438,091, and the products sold under the trade name “Miranol®”, and described in U.S. Pat. No. 2,528,378.
The weight ratio of water-soluble or water-dispersible copolymer herein to nonionic, anionic, amphoteric, zwitterionic surfactant or mixtures thereof is between 1:100 and 10:1, alternatively between 1:50 and 1:1.
Chelating Agents
One class of optional compounds for use herein includes chelating agents or mixtures thereof. Chelating agents can be incorporated in the compositions herein in amounts ranging from 0.0% to 10.0% by weight of the total composition, alternatively 0.01% to 5.0%.
Suitable phosphonate chelating agents for use herein may include alkali metal ethane 1-hydroxy diphosphonates (HEDP), alkylene poly (alkylene phosphonate), as well as amino phosphonate compounds, including amino aminotri(methylene phosphonic acid) (ATMP), nitrilo trimethylene phosphonates (NTP), ethylene diamine tetra methylene phosphonates, and diethylene triamine penta methylene phosphonates (DTPMP). The phosphonate compounds may be present either in their acid form or as salts of different cations on some or all of their acid functionalities. Phosphonate chelating agents to be used herein are diethylene triamine penta methylene phosphonate (DTPMP) and ethane 1-hydroxy diphosphonate (HEDP). Such phosphonate chelating agents are commercially available from Monsanto under the trade name DEQUEST®.
Polyfunctionally-substituted aromatic chelating agents may also be useful in the compositions herein. See U.S. Pat. No. 3,812,044, issued May 21, 1974, to Connor et al. Compounds of this type in acid form are dihydroxydisulfobenzenes such as 1,2-dihydroxy-3,5-disulfobenzene.
One biodegradable chelating agent for use herein is ethylene diarnine N,N′-disuccinic acid, or alkali metal, or alkaline earth, ammonium or substitutes ammonium salts thereof or mixtures thereof. Ethylenediamine N,N′-disuccinic acids, especially the (S,S) isomer have been extensively described in U.S. Pat. No. 4,704,233, Nov. 3, 1987, to Hartman and Perkins. Ethylenediamine N,N′-disuccinic acids is, for instance, commercially available under the tradename ssEDDS® from Palmer Research Laboratories.
Suitable amino carboxylates for use herein include ethylene diamine tetra acetates, diethylene triamine pentaacetates, diethylene triamine pentaacetate (DTPA), N-hydroxyethylethylenediamine triacetates, nitrilotri-acetates, ethylenediamine tetrapropionates, triethylenetetraaminehexa-acetates, ethanol-diglycines, propylene diamine tetracetic acid (PDTA) and methyl glycine di-acetic acid (MGDA), both in their acid form, or in their alkali metal, ammonium, and substituted ammonium salt forms. One suitable amino carboxylates to be used herein are diethylene triamine penta acetic acid, propylene diamine tetracetic acid (PDTA) which is, for instance, commercially available from BASF under the trade name Trilon FS® and methyl glycine di-acetic acid (MGDA).
Further carboxylate chelating agents for use herein include salicylic acid, aspartic acid, glutamic acid, glycine, malonic acid or mixtures thereof.
Fatty Acid
The hard surface cleaning compositions of the present invention may comprise a fatty acid, or mixtures thereof as an optional ingredient.
Suitable fatty acids for use herein are the alkali salts of a C8-C24 fatty acid. Such alkali salts include the metal fully saturated salts like sodium, potassium and/or lithium salts as well as the ammonium and/or alkylammonium salts of fatty acids, alternatively the sodium salt. Fatty acids for use herein contain from 8 to 22, alternatively from 8 to 20, alternatively from 8 to 18 carbon atoms.
Suitable fatty acids may be selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and mixtures of fatty acids suitably hardened, derived from natural sources such as plant or animal esters (e.g., palm oil, olive oil, coconut oil, soybean oil, castor oil, tallow, ground oil, whale and fish oils and/or babassu oil.
For example Coconut Fatty Acid is commercially available from UNICHEMA under the name PRIFAC 5900®.
Fatty acids are desired herein as they reduce the sudsing of the liquid composition used in the process according to the present invention.
Typically, the hard surface cleaning composition herein may comprise up to 6%, alternatively from 0.1% to 2.0%, alternatively from 0.1% to 1.0%, alternatively from 0.2% to 0.8% by weight of the total composition of said fatty acid.
Branched Fatty Alcohol
The hard surface cleaning composition of the present invention may comprise a branched fatty alcohol, or mixtures thereof as an optional ingredient.
Such suitable compounds are commercially available, for instance, as the Isofol® series such as Isofol® 12 (2-butyl octanol) or Isofol® 16 (2-hexyl decanol) commercially available from Condea.
Alternatively, said branched fatty alcohol is selected from the group consisting of 2-butyl octanol, 2-hexyl decanol, and a mixture thereof Alternatively, said 2-alkyl alkanol is 2-butyl octanol.
Typically, the hard surface cleaning composition herein may comprise up to 2%, alternatively from 0.10% to 1.0%, alternatively from 0.1% to 0.8% and alternatively from 0.1% to 0.5% by weight of the total composition of said branched fatty alcohol.
Solvent
The hard surface cleaning compositions, alternatively the liquid hard surface cleaning composition, of the present invention may comprise a solvent, or mixtures thereof as an optional ingredient.
A suitable solvent is selected from the group consisting of: ethers and diethers having from 4 to 14 carbon atoms, alternatively from 6 to 12 carbon atoms, alternatively from 8 to 10 carbon atoms; glycols or alkoxylated glycols; alkoxylated aromatic alcohols; aromatic alcohols; alkoxylated aliphatic alcohols; aliphatic alcohols; C8-C14 alkyl and cycloalkyl hydrocarbons and halohydrocarbons; C6-C16 glycol ethers; terpenes; and mixtures thereof.
Suitable glycols to be used herein are according to the formula HO—CR1R2—OH wherein R1 and R2 are independently H or a C2-C10saturated or unsaturated aliphatic hydrocarbon chain and/or cyclic. Suitable glycols to be used herein are dodecaneglycol and/or propanediol.
Suitable alkoxylated glycols to be used herein are according to the formula R-(A)n-R1—OH wherein R is H, OH, a linear or branched, saturated or unsaturated alkyl of from 1 to 20 carbon atoms, alternatively from 2 to 15, alternatively from 2 to 10, wherein R1 is H or a linear saturated or unsaturated alkyl of from 1 to 20 carbon atoms, alternatively from 2 to 15, alternatively from 2 to 10, and A is an alkoxy group alternatively ethoxy, methoxy, and/or propoxy and n is from 1 to 5, alternatively 1 to 2. Suitable alkoxylated glycols to be used herein are methoxy octadecanol and/or ethoxyethoxyethanol.
Suitable alkoxylated aromatic alcohols to be used herein are according to the formula R-(A)n—OH wherein R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, alternatively from 2 to 15, alternatively from 2 to 10, wherein A is an alkoxy group alternatively butoxy, propoxy and/or ethoxy, and n is an integer of from 1 to 5, alternatively 1 to 2. Suitable alkoxylated aromatic alcohols are benzoxyethanol and/or benzoxypropanol.
Suitable aromatic alcohols to be used herein are according to the formula R—OH wherein R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, alternatively from 1 to 15, alternatively from 1 to 10. For example a suitable aromatic alcohol to be used herein is benzyl alcohol.
Suitable alkoxylated aliphatic alcohols to be used herein are according to the formula R-(A)n—OH wherein R is a linear or branched, saturated or unsaturated alkyl group of from 1 to 20 carbon atoms, alternatively from 2 to 15, alternatively from 3 to 12, wherein A is an alkoxy group alternatively butoxy, propoxy and/or ethoxy, and n is an integer of from 1 to 5, alternatively 1 to 2. Suitable alkoxylated aliphatic linear or branched alcohols are butoxy propoxy propanol (n-BPP), butoxyethanol, butoxypropanol (n-BP), ethoxyethanol, 1-methylpropoxyethanol, 2-methylbutoxyethanol, or mixtures thereof. Butoxy propoxy propanol is commercially available under the trade name n-BPP® from Dow chemical. Butoxypropanol is commercially available from Dow chemical.
Suitable aliphatic alcohols to be used herein are according to the formula R—OH wherein R is a linear or branched, saturated or unsaturated alkyl group of from 1 to 20 carbon atoms, alternatively from 2 to 15, alternatively from 5 to 12. With the proviso that said aliphatic branched alcohols is not a 2-alkyl alkanol as described herein above. Suitable aliphatic alcohols are methanol, ethanol, propanol, isopropanol or mixtures thereof.
Suitable terpenes to be used herein monocyclic terpenes, dicyclic terpenes and/or acyclic terpenes. Suitable terpenes are: D-limonene; pinene; pine oil; terpinene; terpene derivatives as menthol, terpineol, geraniol, thymol; and the citronella or citronellol types of ingredients.
Other suitable solvents include butyl diglycol ether (BDGE), hexandiols, butyltriglycol ether, ter amilic alcohol and the like. BDGE is commercially available from Union Carbide or from BASF under the trade name Butyl CARBITOL®.
Alternatively, said solvent is selected from the group consisting of butoxy propoxy propanol, butyl diglycol ether, benzyl alcohol, butoxypropanol, ethanol, methanol, isopropanol, hexandiols and mixtures thereof. Alternatively, said solvent is selected from the group consisting of butoxy propoxy propanol, butyl diglycol ether, benzyl alcohol, butoxypropanol, ethanol, methanol, isopropanol and mixtures thereof. Alternatively said solvent is selected from the group consisting of butyl diglycol ether, butoxypropanol, ethanol and mixtures thereof.
Typically, the liquid hard surface cleaning composition herein may comprise up to 30%, alternatively from 1% to 25%, alternatively from 1% to 20%, alternatively from 2% to 10% by weight of the total composition of said solvent or mixture thereof.
In one embodiment the solvent comprised in the hard surface cleaning composition according to the present invention is a volatile solvent or a mixture thereof, alternatively a volatile solvent or a mixture thereof in combination with another solvent or a mixture thereof.
Perfumes
The hard surface cleaning compositions of the present invention may comprise a perfume or a mixture thereof as an optional ingredient.
Suitable perfumes for use herein include materials which provide an olfactory aesthetic benefit and/or cover any “chemical” odor that the product may have.
The compositions herein may comprise a perfume or a mixture thereof, in amounts up to 5.0%, alternatively in amounts of 0.01% to 2.0%, alternatively in amounts of 0.05% to 1.5%, alternatively in amounts of 0.1% to 1.0%, by weight of the total composition.
Builders
The hard surface cleaning compositions of the present invention may also comprise a builder or a mixture thereof, as an optional ingredient.
Suitable builders for use herein include polycarboxylates and polyphosphates, and salts thereof. Typically, the compositions of the present invention comprise up to 20.0% by weight of the total composition of a builder or mixtures thereof, alternatively from 0.1% to 10.0%, alternatively from 0.5% to 5.0%.
Radical Scavenger
The compositions of the present invention may comprise a radical scavenger.
Suitable radical scavengers for use herein include the well-known substituted mono and dihydroxy benzenes and their analogs, alkyl and aryl carboxylates and mixtures thereof. Radical scavengers for use herein include di-tert-butyl hydroxy toluene (BHT), hydroquinone, di-tert-butyl hydroquinone, mono-tert-butyl hydroquinone, tert-butyl-hydroxy anysole, benzoic acid, toluic acid, catechol, t-butyl catechol, benzylamine, 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane, n-propyl-gallate or mixtures thereof. Such radical scavengers like N-propyl-gallate may be commercially available from Nipa Laboratories under the trade name Nipanox S1®.
Radical scavengers when used, are typically present herein in amounts up to 10% and alternatively from 0.001% to 0.5% by weight of the total composition.
The presence of radical scavengers may contribute to the chemical stability of the compositions of the present invention.
Other Adjuvants
Non-limiting examples of other adjuncts are: enzymes such as proteases, hydrotropes such as sodium toluene sulfonate, sodium cumene sulfonate and potassium xylene sulfonate, and aesthetic-enhancing ingredients such as colorants, providing they do not adversely impact on filming/streaking. The compositions can also comprise one or more colored dyes or pigments. Dyes, pigments and disappearing dyes, if present, will constitute from 0.1 ppm to 50 ppm by weight of the aqueous composition.
Packaging Form of the Compositions
The compositions herein may be packaged in a variety of suitable detergent packaging known to those skilled in the art. The liquid compositions are alternatively packaged in conventional detergent plastic bottles.
EXAMPLES
Example 1
Preparation of Copolymers
Example 1.1
A Copolymer of 90% Moles of Vinyl Pyrrolidone and 10% Moles of SPE
32.2 g of water are added to a 500 mL glass three-necked flask, equipped with a shaking mechanism, a coolant and a temperature regulator with an oil bath. With nitrogen flushing, the temperature of the reactive environment is brought to 75° C. At 75° C., 0.11 g of 2,2′-azobis(2-methylpropionamidine)dichloride dissolved in 0.6 g of water is added. A solution containing 82.1 g of n-vinylpyrrolidone, 22.9 g of SPE and 195 g of water, and another solution containing 1 g of 2,2′-azobis(2-methylpropionamidine)dihydrochloride and 20 g of water are then simultaneously added over 4 and 5 hours respectively. After these additions, shaking and the temperature are maintained over 4 hours. The reactive environment is then cooled to room temperature.
Example 2
Hard Surface Cleaning Compositions
The following examples are meant to exemplify hard surface cleaning compositions according to the present invention, alternatively used in a process of cleaning a hard surface according to the present invention but are not intended to limit the scope of the present invention. The hard surface cleaning compositions below are made by combining the listed ingredients in the order given using the listed proportions to form homogenous mixtures (solution % is by weight of active material).



















Composition
A
B
C
D
E
F
G





Alkoxylated nonionic surfactants


C 9-11 EO5
4.5
—
9.0
4.0
3.0
—
—


C12,14 EO5
1.5
—
—
6.0
0.5
0.7
—


C10 AO7
—
3.5
—
—
—
—
3.0


C 9-11 EO8
—
—
—
2.0
—
—
—


Anionic surfactants


NaLAS
0.5
0.2
0.4
1.5
0.2
—
0.5


Isalchem ® AS
—
—
—
—
—
0.4
—


NaCS
1.5
0.7
1.7
3.0
1.4
0.8
0.8


Neutralizing co-surfactants


C12-14 AO
0.2
—
—
—
0.1
0.5
—


Polymers


Copolymer 1
0.1
0.1
 0.15
 0.15
 0.05
 0.075
0.1


Chelants


DTPMP
0.1
0.1
0.2
—
 0.15
—
0.1


Buffer


Na2CO3
0.2
0.4
1.0
1.0
0.6
—
0.5


Citric
1.0
—
0.8
0.7
0.5
1.0
—


Caustic
0.8
—
0.3
0.4
0.3
0.7
—


Suds control


Fatty Acid
0.8
0.3
0.3
0.2
0.2
0.3
0.2


Isofol 12 ®
—
—
—
0.5
—
—
—


Solvents


EtOH
—
—
—
—
—
—
1.0


n-BP
—
—
—
—
—
5.5
3.0


MEA
—
—
—
—
—
0.7
—








Minors and water
up to 100














pH
9.5
9.5
9.5
9.5
10.0 
11.0 
9.5





Composition
H
I
J
K
L
M
N





Alkoxylated nonionic surfactants


C 9-11 EO5
—
0.2
—
0.1
—
0.1
—


C 9-11 EO8
0.5
0.4
0.5
2.0
2.2
2.2
2.0


Anionic surfactants


NaLAS
—
—
—
0.5
—
—
—


Isalchem ® AS
2.0
2.5
2.0
—
—
—
0.5


NaCS
—
—
—
0.5
—
—
—


Polymers


Copolymer I
0.1
 0.05
0.2
 0.025
0.1
 0.05
 0.025


Kelzan T ®
0.3
0.2
0.3
0.2
0.3
0.2
0.2


Chelants


DTPMP
—
—
0.5
—
0.2
0.1
—


Buffer


Citric
3.0
2.7
3.0
2.7
—
—
—


Phosphoric
—
—
—
—
9.0
6.0
6.0


NaOH
—
0.5
—
—
0.1
 0.05
 0.05


KOH
0.8
—
0.8
0.8
—
—
—


Suds control


Fatty Acid
—
0.1
—
0.1
—
—
0.1


Isofol 12 ®
—
0.1
0.1
—
—
—
0.1


Solvents


EtOH
—
—
0.5
—
—
—
—


n-BP
—
1.0
0.5
—
—
—
—


n-BPP
2.0
1.0
10  
2.0
—
—
2.0








Minors and water
up to 100














pH
3.6
3.6
3.5
4.0
0.8
0.8
0.8









Copolymer I is a copolymer of 90% moles of vinyl pyrrolidone and 10% moles of SPE, as obtained from Example 1.1
C 9-11 EO5 is a C 9-11 EO5 nonionic surfactant commercially available from ICI or Shell.
C 9-11 EO8 is a C 9-11 EO8 nonionic surfactant commercially available from ICI or Shell.
C12,14 EO5 is a C12, 14 EO5 nonionic surfactant commercially available from Huls, A&W or Hoechst.
C10 AO7 is an alkoxylated non-ionic surfactant commercially available from BASF under the tradename Lutensol XL 70®.
C12,14 EO21 is a C12-14 EO21 nonionic surfactant.
NaLAS is Sodium Linear Alkylbenzene sulphonate commercially available from A&W.
NaCS is Sodium Cumene sulphonate commercially available from A&W.
Isalchem® AS is a C12-13 sulphate surfactant commercially available from Enichem.
C12-14 AO is a C12-14 amine oxide surfactant.
DTPMP is diethylenetriaminepentamethylphosponic acid commercially available from Solutia.
Isofol 12® is 2-butyl octanol commercially available from Condea.
n-BP is normal butoxy propanol commercially available from Dow Chemicals.
n-BPP is normal butoxy propoxy propanol commercially available from Dow Chemicals.
Ethanol is commercially available from Condea.
MEA is mono-ethanolamine commercially available from Condea.
Kelzan T® is Xanthan gum available from Kelco.
Fatty acid is a Coconut Fatty Acid.
These hard surface cleaning compositions are used in a process as disclosed herein and provide good filming and/or streaking performance as well as good shine performance, when used in a hard surface cleaning application. In addition, when used in a hard surface cleaning application these hard surface cleaning compositions provide good soil repellency performance as well as good next time cleaning benefit performance. Furthermore, these hard surface cleaning compositions show good fast drying benefits on inclined or vertical hard surfaces.
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm”.
It should be understood that every maximum numerical limitation given throughout this specification includes every lower numerical limitation, as if such lower numerical limitations were expressly written herein. Every minimum numerical limitation given throughout this specification includes every higher numerical limitation, as if such higher numerical limitations were expressly written herein. Every numerical range given throughout this specification includes every narrower numerical range that falls within such broader numerical range, as if such narrower numerical ranges were all expressly written herein.

## Claims

1. A hard surface cleaning composition comprising:
a copolymer, wherein said copolymer comprises:
a zwitterionic unit A or a mixture thereof and another unit B or a mixture thereof, wherein said unit A is selected from the group consisting of (SPE), (SPP), (SHPE), (SHPP), and mixtures thereof, and wherein said unit B is derived from vinyl-pyrrolidone, and wherein said copolymer is substantially devoid of cationic or potentially cationic CC units; and

a detergent surfactant.

2. A hard surface cleaning composition according to claim 1, wherein in said copolymer said units A and B represent 50 to 100% in moles of the copolymer units.

3. A hard surface cleaning composition according to claim 1, wherein in said copolymer the molar ratio between said units A and B is between 1/99 and 25/75.

4. A hard surface cleaning composition according to claim 1, wherein said copolymer additionally comprises :
non-ionic, hydrophilic or hydrophobic CN units, and/or
anionic or potentially anionic CA units.

5. A hard surface cleaning composition according to claim 1, wherein said copolymer is a statistical copolymer.

6. A hard surface cleaning composition according to claim 1, wherein in said copolymer said betaine group or mixture thereof of said unit A is or are pendant groups of said copolymer.

7. A hard surface cleaning composition according to claim 1, wherein in said copolymer said units A and B, alternatively with other units, form a polyalkylene hydrocarbon chain, alternatively broken by one or more nitrogen or sulphur atom.

8. A hard surface cleaning composition according to claim 1, wherein said copolymer is obtainable by a copolymerization step by introducing:
a monomer A, containing an ethylenically unsaturated group and a sulphobetaine group,
vinyl pyrrolidone, and
a free radicals source.

9. A hard surface cleaning composition according to claim 1, wherein said copolymer is present at a level of from 0.001% to 10% of the total weight of said composition.

10. A hard surface cleaning composition according to claim 1, wherein said composition is a liquid hard surface cleaning composition.

11. A hard surface cleaning composition according to claim 1, wherein said surfactant is present at a level of from 0.01% to 20% by weight of the composition.

12. A hard surface cleaning composition according to claim 1, wherein said composition has an acidic to neutral pH and alternatively additionally comprises an acid.

13. A pre-moistened hard surface cleaning wipe comprising a substrate impregnated with a hard surface cleaning composition according to claim 1.

14. A process of cleaning a hard surface with a hard surface cleaning composition according to claim 1.

15. A process of cleaning a hard surface according to claim 14, wherein said hard surface is selected from the group consisting of bathroom surfaces.