Patent Description:
In many industrial cleaning and disinfection applications, such as cleaning and/or disinfection of hospitals, medical devices, for example chirurgical instruments, the manufacture of foods and beverages, especially in the meat processing industry. Hard as well as soft surfaces commonly become contaminated with soils such as carbohydrate, proteins, blood and water hardness soils, food oil soils, fat soils and other soils. Such soils can arise from the manufacture of both liquid and solid residences/contaminants. Grease soils and residue soils such as proteins, fats, blood and oils, especially when dried, can be hard to remove soil. Similarly, carbohydrate soils, such as cellulosic, monosaccharides, disaccharides, oligosaccharides, starches, gums and other complex materials, when dried, can form tough, hard to remove soils, particularly when combined with other soil components such as proteins, blood, fats, oils, minerals, and others. The removal of such soils and residues, can be a significant problem.

The <CIT> relates to an aqueous composition for removing soil at low temperatures from a surface to be cleaned, comprising a source of alkalinity, a surfactant, an iron(III) activator complex and a source of peroxide. The composition can be used for removing soil from a surface to be cleaned, preferably in a clean-out-of-place systems (COP) or in a clean-in-place system (CIP).

Clean out of place systems (COP) cleaning techniques are a specific cleaning regimen adapted for removing soils from exterior surfaces of a wide variety of parts, such as ceramic surfaces, metal surfaces, walls, wash tanks, soaking vessels, mop buckets, holding tanks, scrub sinks, vehicle parts washers, non-continuous batch washers and systems, ceilings, external parts of production machinery and the like.

Often clean out of place methods can involve a first rinse, the application of the cleaning solutions, and a second rinse with potable water followed by resumed operations. The process can also include any other contacting step in which a rinse, acidic or basic functional fluid, solvent or other cleaning component such as hot water, cold water, etc. can be contacted with the equipment at any step during the process. Conventional clean in place as well as clean out of place methods require high temperatures, up to <NUM>° C. In production rooms, the elevated water temperature currently used for that kind of cleaning processes is in the range of <NUM>° C to <NUM>° C. Conventional clean out of place techniques (COP) thus require the consumption of large amounts of energy.

Detergent compositions generally used in clean out of place processes, related to medical devices, hospitals, food and meat processing industry are no-foaming or low foaming liquid compositions. No-foaming or low foaming detergent compositions have the drawback that the dwell time or so called "soaking time" on an upright tiled wall is short due to a good flow rate of the liquid detergent composition.

Furthermore, no-foaming or low foaming detergent compositions have the drawback that the user cannot easily track the areas that are processed or not processed due to the brief residence time of the detergent composition, and low foam stability. There is a tendency that surfaces to be cleaned are treated twice thus require the consumption of large amounts of water and detergent composition.

In particular prior art foams have the disadvantage that over extended contact times the foam that adheres to a surface loses liquid detergent and water that is held in between the foam air bubbles of the foam. This is mainly driven by collapsing of the foam bubbles and the subsequence drainage of the liquid discharged of said collapsed foam bubbles. This results in a dry foam having decreased cleaning and disinfection effect.

What is needed therefore is an improved detergent composition for removing soils having increased foam stability at lower temperatures, an increased dwell time and being traceable.

The object addressed by the present invention is to provide a long lasting foaming detergent composition that has excellent soil removal properties at lower temperatures, increased foam stability, increased dwell time and being traceable, that can be used for example in removing soil from a surface to be cleaned, preferably in a clean-out-of-place systems (COP) or in a clean-in-place system (CIP).

According to one aspect an aqueous foaming detergent composition for removing of soil at low temperatures from a surface to be cleaned is provided.

According to one aspect an aqueous foaming detergent composition is provided comprising:.

It has been surprisingly found that the aqueous foaming detergent composition can be used for removal of soil at reduced temperatures, while still providing excellent soil removal properties. Thus, the compositions of the present invention provide for reduced energy consumption, since it is active at lower cleaning temperatures.

It has been further surprisingly found that the aqueous foaming detergent composition provides a long lasting foam, which adheres excellent on vertical and horizontal surfaces as well as overhead surfaces.

It has been further surprisingly found that the long lasting foam holds more of the cleaning liquid and water over an significant increased extended time period.

The foam of the present invention holds the cleaning liquid and water released by collapsing foam bubbles over a significant increased time period. This provides a wet foam over a significant increased time period that adheres to the surface to be cleaned and maintains its cleaning activity for a significant increased time period.

The composition of the invention is applied to the surface to be cleaned in the form of a foam. The foam has compared to know foaming composition an remarkable increased dwell time and liquid absorption capacity and the foam treated areas can be easily tracked due to the visibility of the foam that avoids multiple treatment of the same area.

Furthermore, the aqueous foaming detergent composition is active at a low components concentration thus provides a reduced chemical consumption.

According to another embodiment the aqueous foaming detergent composition comprises:.

the weight % of the components are based on the total weight of the composition and the total wt. -% of all components of the composition does not exceed <NUM> wt.

According to one aspect an aqueous foaming detergent composition is provided wherein the aqueous foaming detergent composition comprises in addition:.

The aqueous foaming detergent composition can be present in form of a concentrated solution. The concentrated solution has advantages in transporting and storing. The concentrated solution can be diluted, for example prior use, by admixing a solvent, preferably water.

It should be understood that the aqueous foaming detergent composition can be free of at least one additive selected from the group of dye, color transfer inhibitor, anti-redeposition agents, optical brighteners, builder, oil and water repellant agents, color fastness agents, starch/sizing agents, fabric softening agents, anti-microbials, fungicides, UV absorbers, fragrances and/or mixtures thereof.

In some aspects, the present invention relates to aqueous foaming detergent compositions and methods for removing soils from surfaces to be cleaned. Surfaces to be cleaned are hard and/or soft surfaces. In some embodiments, the composition of the invention is applied in a clean in place process (CIP) and/or in a clean out of place process (COP). According to the present invention it may be preferred that the clean in place process (CIP) is a fully automated cleaning process that may requires no reconstruction of the production plant before execution of the cleaning.

In other embodiments, the compositions of the invention may be manually applied to the surface to be cleaned. In particular the compositions of the invention can be used in hospital cleaning, cleaning of medical devices, for example chirurgical instruments, the food processing industry, such as meat processing industry, for cleaning purposes.

The aqueous foaming detergent composition can be a more component composition that can be mixed in situ at the place of use.

The aqueous foaming detergent composition can be applied to the surfaces to be cleaned in form of foam. Applying foam to an upright surface to be cleaned provides a long lasting contact time and the treated areas can be easily traced.

The aqueous foaming detergent composition allows for the use of reduced levels of chemistry, because the foaming detergent of the invention has a remarkable increased cleaning efficiency that allows the use of a lower concentrated foaming detergent composition. Thus, the methods of the present invention provide for reduced energy consumption, e.g., lower cleaning temperatures, and reduced chemical consumption.

So that the invention may be more readily understood, certain terms are defined.

As used herein, "by weight" refers to the total weight of the composition. For example, if a composition has a total weight of <NUM> grams and comprises <NUM>% (by weight) of an alcohol, the composition may comprise <NUM> grams of alcohol.

It is understood that the total weight percent amount of all components, substances or agents of a composition are selected such that it does not exceed <NUM> wt.

It is understood that, as used here, "percent", "%", and the like are intended to be synonymous with "weight percent", "wt-%", etc..

In the understanding of the present specification the C<NUM>-C<NUM> alcohols is not a solvent, but an active agent.

As used herein, the term "surface" refers to a surface of a medical instrument, a healthcare setting, a tool, a machine, equipment, a structure, a building, or the like that is employed as part of a food processing, preparation, or storage activity. Examples of healthcare settings include hospitals, doctor's offices and long term care facilities. Examples of food processing surfaces include surfaces of food processing or preparation equipment, e.g., slicing, canning, or transport equipment, including flumes, of food processing wares, e.g., utensils, dishware, wash ware, and bar glasses), and of floors, walls, or fixtures of structures in which food processing occurs. Food processing surfaces are found and employed in milking machines, food anti-spoilage air circulation systems, aseptic packaging sanitizing, food refrigeration and cooler cleaners and sanitizers, ware washing sanitizing, blancher cleaning and sanitizing, food packaging materials, cutting board additives, third-sink sanitizing, beverage chillers and warmers, meat chilling or scalding waters, auto dish sanitizers, sanitizing gels, cooling towers, food processing antimicrobial garment sprays, and non-to-low-aqueous food preparation lubricants, oils, and rinse additives.

As used herein, the term "ware" refers to items such as eating and cooking utensils, dishes, and other hard surfaces such as showers, sinks, toilets, bathtubs, countertops, windows, mirrors, transportation vehicles, and floors.

As used herein, the term "active components" refers to the components comprising source of alkalinity; alkyl sulfate surfactant of a C<NUM>-C<NUM>-alkyl sulfate; alkyl (EO)n/(PO)m-alkoxylate surfactant of a C<NUM>-C<NUM>-alkyl (EO)n/(PO)m-alkoxylate, wherein n = <NUM> to <NUM>, or <NUM> to <NUM>, and m = <NUM> to <NUM>, or <NUM> to <NUM>, or <NUM> to <NUM>; alkyl dialkylaminoacetate surfactant of a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkylamino acetate; alkyl iminodipropionate surfactant of a C<NUM>-C<NUM>-alkyl iminodipropionate; alkyl iminodiglycinate surfactant of a C<NUM>-C<NUM>-alkyl iminodiglycinate; and alcohol of a C<NUM>-C<NUM> alcohol.

If not other where stated the temperatures is <NUM>° C.

If not other where stated the humidity is <NUM>% ±<NUM>% at <NUM>° C.

It should be noted that, as used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the content clearly dictates otherwise. Thus, for example, reference to a composition containing "a compound" includes a composition having two or more compounds.

It should also be noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

It should also be noted that the term "additional surfactant" or "additional surfactants" means a surfactant that exceeds the number of the five different surfactants of the aqueous foaming detergent composition.

It is specifically understood that any numerical value recited herein (e.g., ranges) includes all values from the lower value to the upper value, i.e., all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be expressly stated in this application. For example, if a concentration range is stated as <NUM>% to <NUM>%, it is intended that values such as <NUM>% to <NUM>%, <NUM>% to <NUM>%, or <NUM>% to <NUM>%, etc., are expressly enumerated in this specification. These are only examples of what is specifically intended.

It is to be understood that all values and ranges between values and ranges are encompassed by the methods of the present invention.

In some embodiments, the compositions of the invention including the foam can have an alkaline pH, for example a pH of <NUM> to <NUM>.

According to one aspect the aqueous foaming detergent composition as well as the foam has a pH in the range of <NUM> to <NUM>, preferably a pH in the range of <NUM> to <NUM> and more preferred a pH in the range of <NUM> to <NUM>.

The term "Mw" refers to an average molecular weight.

The methods, and compositions of the present invention can include, or consist essentially of, or consist, of the steps, and ingredients of the present invention as well as other ingredients described herein. As used herein, "consisting essentially of" means that the methods, and compositions may include additional steps, or ingredients, but only if the additional steps, or ingredients do not materially alter the basic and novel characteristics of the claimed methods, and compositions.

In some aspects, the methods and compositions of the present invention may be applied to equipment generally cleaned using clean in place cleaning procedures. Examples of such equipment include evaporators, heat exchangers, including tube-in-tube exchangers, direct steam injection, and plate-in-frame exchangers, heating coils, including steam, flame or heat transfer fluid heated, re-crystallizers, pan crystallizers, spray dryers, drum dryers, and tanks.

The methods and compositions of the present invention may be used in any application where thermally degraded soils, i.e., caked on soils or burned on soils, such as proteins or carbohydrates, need to be removed. As used herein, the term "thermally degraded soil" refers to a soil or soils that have been exposed to heat and as a result have become baked on to the surface to be cleaned. Exemplary thermally degraded soils include food soils that have been heated during processing, e.g., dairy products heated on pasteurizers, fructose, or corn syrup.

The methods and compositions of the present invention may also be used to remove other non-thermally degraded soils that are not easily removed using conventional cleaning techniques. Soil types suited to cleaning with the methods of the present invention include, but are not limited to, starch, cellulosic fiber, protein, simple carbohydrates and combinations of any of these soil types with mineral complexes. Examples of specific food soils that are effectively removed using the methods of the present invention include, but are not limited to, meat residues, blood residues, protein residues, vegetable and fruit juices, brewing and fermentation residues, soils generated in sugar beet and cane processing, and soils generated in condiment and sauce manufacture, e.g., ketchup, tomato sauce, barbeque sauce. These soils can develop on heat exchange equipment surfaces and on other surfaces during the manufacturing and packaging process.

Exemplary industries in which the methods and compositions of the present invention can be used include, but are not limited to: the food and beverage industry, e.g., the meat processing industry; dairy, cheese, sugar, and brewery industries; oil processing industry; industrial agriculture and ethanol processing; and the pharmaceutical manufacturing industry.

Conventional CIP as well as COP processing is generally well-known. The process includes applying a foam composition of the invention onto the surface to be cleaned. The foam adheres on the surface for slowly removing the soil.

The process to remove a soil according to the invention can includes an alkaline foam wash. According to one embodiment of the invention a process to remove a soil can include a fresh water rinse and an alkaline foam wash or a fresh water rinse, an alkaline foam wash and a fresh water rinse. Another embodiment of a process of the invention to remove soil can comprise at least three steps: an alkaline foam wash, an acid solution wash, and then a fresh water rinse. The alkaline foam softens the soils and removes the organic alkaline soluble soils. The subsequent acid solution removes mineral soils left behind by the alkaline cleaning step. The strength of the alkaline and acid solutions and the duration of the cleaning steps are typically dependent on the durability of the soil. The water rinse removes any residual solution and soils, and cleans the surface prior to the equipment being returned on-line.

The methods and compositions of the present invention provide for enhanced soil removal at reduced temperatures, e.g., ≥ <NUM>° C to ≤ <NUM>° C, preferably at <NUM>° C to <NUM>° C or at <NUM>° C to <NUM>° C. The present invention also provides for a reduction in the amount of chemistry and water consumed during the cleaning process. Thus, the present invention provides both energy and water savings, while achieving effective soil removal.

The composition of the invention can be applied by spray as foam to the surface to be cleaned. By "spray" the present invention means a spray of discrete droplets or a jet of foam.

The foam stability allows an improved cleaning effect, because the foam as such can be considered as a carrier for the aqueous foaming detergent composition. It ensures that the foam of the aqueous foaming detergent composition can also adhere to vertical surface and ceilings. As a result, long lasting contact time is achieved between the foam of the aqueous foaming detergent composition and the surface to be cleaned. The foam layer of the aqueous foaming detergent composition has a repository effect, i.e. through destruction of further foam bubbles new cleaning agent solution is constantly transported to the surface.

A surfactant mixture of five different surfactants is used in the aqueous foaming detergent composition and methods of the present invention.

According to one aspect the five different surfactants of the aqueous foaming detergent composition are selected from the group comprising:.

According to one aspect the aqueous foaming detergent composition may comprises a maximum number of five different surfactants of an C<NUM>-C<NUM>-alkyl sulfate, a C<NUM>-C<NUM>-alkyl (EO)n/(PO)m-alkoxylate, wherein n = <NUM> to <NUM>, or <NUM> to <NUM>, and m = <NUM> to <NUM>, or <NUM> to <NUM>, or <NUM> to <NUM>, a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkyl-amino acetate, a C<NUM>-C<NUM>-alkyl iminodipropionate, and a C<NUM>-C<NUM>-alkyl iminodiglycinate.

According to another embodiment the alkyl sulfate surfactant can be a C<NUM>-C<NUM>-alkyl sulfate, preferably a C<NUM>-C<NUM>-alkyl sulfate and most preferred a lauryl sulfate.

According to another embodiment the alkyl (EO)n/(PO)m-alkoxylate surfactant can be a C<NUM>-C<NUM>-alkyl (EO)n/(PO)m-alkoxylate, preferably a C<NUM>-C<NUM>-alkyl (EO)n/(PO)m-alkoxylate and most preferred a C<NUM>-C<NUM>-alkyl (EO)n/(PO)m-alkoxylate; wherein n = <NUM> to <NUM> and m = <NUM> to <NUM>, preferably n = <NUM> to <NUM> and m = <NUM> and more preferred n = <NUM> and m = <NUM>.

According to another embodiment the alkyl C<NUM>-C<NUM>-dialkylaminoacetate surfactant can be a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkylaminoacetate, preferably a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkylaminoacetate, further preferred a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkylaminoacetate and most preferred a coco dimethylaminoacetate.

According to another embodiment the alkyl iminodipropionate surfactant can be a C<NUM>-C<NUM>-alkyl iminodipropionate, preferably a C<NUM>-C<NUM>-alkyl iminodipropionate, further preferred a C<NUM>-C<NUM>-alkyl iminodipropionate and most preferred a coco iminodipropionate.

According to another embodiment the alkyl iminodiglycinate can be a C<NUM>-C<NUM>- alkyl iminodiglycinate, preferably a C<NUM>-C<NUM>-alkyl iminodiglycinate, further preferred a C<NUM>-C<NUM>-alkyl iminodiglycinate and most preferred a coco iminodiglycinate.

According to another embodiment the five different surfactants can be lauryl sulfate, C<NUM>-C<NUM>-alkyl (EO)<NUM>-<NUM>-alkoxylate, coco imino C<NUM>-C<NUM>-dialkylaminoacetate, coco iminodipropionate, and coco iminodiglycinate.

According to another embodiment of the aqueous foaming detergent composition he weight ratio of the five different surfactants of lauryl sulfate to C<NUM>-C<NUM>-alkyl (EO)<NUM>-<NUM>-alkoxylate to coco imino C<NUM>-C<NUM>-dialkylaminoacetate to coco iminodipropionate to coco iminodiglycinate can be in the range of <NUM> : <NUM> : <NUM> : <NUM> : <NUM> to <NUM> : <NUM> : <NUM> : <NUM> : <NUM>.

According to one embodiment the aqueous foaming detergent composition may comprises in addition at least one further anionic surfactant and/or further non-ionic surfactant. The additional surfactant chosen may be compatible with the surface to be cleaned. The additional surfactant can be an anionic surfactant and/or non-ionic surfactant. It can be preferred that the additional surfactant, which differs from the five surfactants of the aqueous foaming detergent composition may be selected from the group comprising of linear alkyl benzene sulfonates, alcohol sulfonates, amine oxides, alcohol ethoxylates, alkyl phenol ethoxylates, polyethylene glycol esters, EO/PO block copolymers, and mixtures thereof.

In addition, the level and degree of foaming under the conditions of use and in subsequent recovery of the composition may be a factor for selecting particular surfactants and mixtures of surfactants. In particular, the nonionics and anionics may be used in combination.

The examples mentioned in the specification are merely specific illustrations of the numerous surfactants which may find application within the scope of this invention. It should be understood that the selection of particular surfactants or combinations of surfactants may be based on a number of factors including compatibility with the surface to be cleaned at the intended use concentration and the intended environmental conditions including temperature and pH.

In some embodiments, the amount of total surfactant in the aqueous foaming detergent composition, preferably in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. Acceptable levels of surfactants include ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, or ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl sulfate in the aqueous foaming detergent composition, preferably in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of alkyl (EO)n/(PO)m-alkoxylate surfactant, wherein n = <NUM> to <NUM>, or <NUM> to <NUM>, and m = <NUM> to <NUM>, or <NUM> to <NUM>, or <NUM> to <NUM>, in the aqueous foaming detergent composition, preferably in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to < <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkylamino acetate in the aqueous foaming detergent composition, preferably in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl iminodipropionate in the aqueous foaming detergent composition, preferably in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl iminodiglycinate in the aqueous foaming detergent composition, preferably in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant in the aqueous foaming detergent composition, preferably in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. Acceptable levels of surfactants include ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, or ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl sulfate in the aqueous foaming detergent composition, preferably in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of alkyl (EO)n/(PO)m-alkoxylate surfactant, wherein n = <NUM> to <NUM>, or <NUM> to <NUM>, and m = <NUM> to <NUM>, or <NUM> to <NUM>, or <NUM> to <NUM>, in the aqueous foaming detergent composition, preferably in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to < <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkyl-amino acetate in the aqueous foaming detergent composition, preferably in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl iminodipropionate in the aqueous foaming detergent composition, preferably in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments, the amount of total surfactant of a C<NUM>-C<NUM>-alkyl iminodiglycinate in the aqueous foaming detergent composition, preferably in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and in addition preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some aspects, the compositions of the present invention include a source of alkalinity. Exemplary alkaline sources suitable for use with the present invention include, but are not limited to are, basic salts, amines, alkanol amines, carbonates, silicates, and mixtures thereof, preferably the source of alkalinity is selected from the group comprising sodium hydroxide, potassium hydroxide or a mixture thereof, most preferred the source of alkalinity is sodium hydroxide.

Preferably, the source of alkalinity is selected from the group comprising sodium hydroxide, potassium hydroxide or a mixture thereof, most preferred is sodium hydroxide.

According to a more preferred aspect the aqueous foaming detergent composition may comprise a sources of alkalinity wherein the sources of alkalinity include alkali metal hydroxides, alkali metal salts, phosphates, amines, and mixtures thereof, preferably alkali metal hydroxides including sodium hydroxide, potassium hydroxide, and lithium hydroxide, or is a mixture, and most preferred the sources of alkalinity is sodium hydroxide.

The amount of alkaline source present is dependent on a variety of factors including, for example, the type of surface to be cleaned, and the amount and type of soil present on the surface.

In some embodiments of the aqueous foaming detergent composition, the amount of alkaline source present in a concentrated aqueous foaming detergent composition can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%; wherein the source of alkalinity is preferably sodium hydroxide.

In some embodiments of the aqueous foaming detergent composition, the amount of alkaline source present in a diluted aqueous foaming detergent composition can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%; wherein the source of alkalinity is preferably sodium hydroxide.

It is understood that the "surfactants" of the aqueous foaming detergent composition are not regarded as an alkaline source.

According to one aspect the aqueous foaming detergent composition can be free of an alkaline source except sodium hydroxide.

According to one aspect the aqueous foaming detergent composition comprises at least one C<NUM> to C<NUM> alcohol and preferably a mixture of at least two alcohols selected from the group of C<NUM> to C<NUM> alcohols, also referred to as long chain alcohol.

According to an embodiment the mixture of at least two alcohols may comprises:.

wherein the mixture has a ratio of a) C<NUM> to C<NUM> alcohol, preferably a C<NUM> alcohol to b) C<NUM> to C<NUM> alcohol, preferably a C<NUM> alcohol of <NUM>:<NUM> to <NUM>:<NUM>, or <NUM>:<NUM> to <NUM>:<NUM>, or <NUM>:<NUM> to <NUM> : <NUM>.

In some embodiments of the aqueous foaming detergent composition, the alcohol can be a C<NUM>-C<NUM>-alcohol, preferably a C<NUM>-C<NUM>-alcohol and most preferred a mixture of at least two C<NUM> to C<NUM> alcohols, or a mixture of at least two C<NUM>-C<NUM>-alcohols, or a mixture of C<NUM>-C<NUM>-alcohols.

In some embodiments of the aqueous foaming detergent composition, the amount of the long chain alcohol, preferably present in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments of the aqueous foaming detergent composition, the amount of the long chain alcohol, preferably present in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments of the aqueous foaming detergent composition, the amount of the long chain alcohol of a mixture of C<NUM>-C<NUM>-alcohols or a mixture of a C<NUM>-C<NUM>-alcohols, preferably present in a concentrated aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

In some embodiments of the aqueous foaming detergent composition, the amount of the long chain alcohol of a mixture of C<NUM>-C<NUM>-alcohols or a mixture of a C<NUM>-C<NUM>-alcohols, preferably present in a diluted aqueous foaming detergent composition, can be ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt.

Solubilizing intermediaries called hydrotropes. A hydrotrope is a compound that solubilizes hydrophobic compounds in aqueous solutions. Typically, hydrotropes consist of a hydrophilic part and a hydrophobic part (like surfactants) but the hydrophobic part is generally too small to cause spontaneous self-aggregation. Hydrotropes may be present in the aqueous foaming detergent composition.

Hydrotropes that can be suitable used are selected from the group comprising aromatic hydrocarbon sulfonate, preferably xylene sulfonate, toluene sulfonate, or cumene sulfonate; or n-octane sulfonate; or their sodium-, potassium- or ammonium salts or as salts of organic ammonium bases.

Also commonly used are polyols containing only carbon, hydrogen and oxygen atoms. They preferably contain from <NUM> to <NUM> carbon atoms and from <NUM> to <NUM> hydroxy groups. Examples include <NUM>,<NUM>-propanediol, <NUM>,<NUM>-butanediol, hexylene glycol, glycerol, sorbitol, mannitol, and glucose.

In some preferred embodiments the hydrotrope may be selected from the group comprising of a xylene sulfonate, toluene sulfonate, or cumene sulfonate, n-octane sulfonate, and/or acids thereof and also more preferred cumene sulfonate.

In some embodiments, Na-cumolsulfonate, linear alkylbenzene sulfonates (LAS) and/or xylene sulfonate, cumolsulfonate may be suitable to use as hydrotrope and having an improved wetting effect.

According to a more preferred aspect the aqueous foaming detergent composition may comprise at least one hydrotrope that is a cumene sulfonate.

In some embodiments, the aqueous foaming detergent composition, preferably the concentrated aqueous foaming detergent composition, may comprise in addition a hydrotrope, preferably cumolsulfonate or the acid thereof, in the range of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, by weight of the total aqueous foaming detergent composition.

In some embodiments, the aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition may comprise a hydrotrope, preferably cumolsulfonate or the acid thereof, in the range of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, by weight of the total aqueous foaming detergent composition.

It should be understood that the hydrotrope can present in the form of an acid or salt thereof, depending on the pH of the aqueous foaming detergent composition.

It should be understood that the aqueous foaming detergent composition can be free of a hydrotrope.

According to one aspect the aqueous foaming detergent composition can be free of a hydrotrope.

According to one aspect the aqueous foaming detergent composition can be free of a hydrotrope, except cumene sulfonate.

The aqueous foaming detergent composition may include at least one polymeric polycarboxylate. The polymeric polycarboxylates suitable for use include those having a pendant carboxylate (--CO<NUM>) groups and include, for example, polyacrylic acid, maleic/olefin copolymer, acrylic/maleic copolymer, polymethacrylic acid, acrylic acid-methacrylic acid copolymers, hydrolyzed polyacrylamide, hydrolyzed polymethacrylamide, hydrolyzed polyamide-methacrylamide copolymers, hydrolyzed polyacrylonitrile, hydrolyzed polymethacrylonitrile, hydrolyzed acrylonitrile-methacrylonitrile copolymers, and the like.

Further suitable copolymeric polycarboxylates are particularly those of acrylic acid with methacrylic acid and of acrylic acid or methacrylic acid with maleic acid.

Copolymers of acrylic acid with maleic acid, which comprise <NUM> wt. - % to <NUM> wt. - % acrylic acid and <NUM> wt. - % to <NUM> wt. - % maleic acid, have proven to be particularly suitable.

More preferred suitable polycarboxylates are the polyacrylates, which preferably have a molecular weight of <NUM>,<NUM> to <NUM>,<NUM>/mol and preferably <NUM>,<NUM> to <NUM>,<NUM>/mol.

In some embodiments the aqueous foaming detergent composition may comprise a polymeric polycarboxylate, preferably a polyacrylate having a molecular weight of <NUM> Mw to <NUM> Mw, preferably <NUM> Mw to <NUM> Mw, in addition preferred <NUM> Mw to <NUM> Mw and more preferred <NUM> Mw to <NUM> Mw, wherein the molecular weight of the polymeric polycarboxylate is based on a totally neutralized sodium polymeric polycarboxylate.

More preferred is a polymeric polycarboxylate that is a polyacrylate.

In some embodiments an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, may comprise the polymeric polycarboxylate, preferably polyacrylate, in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% of a polycarboxylate, preferably polyacrylate of a polymeric polycarboxylate, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, may comprise the polymeric polycarboxylate, preferably polyacrylate, in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% of a polycarboxylate, preferably polyacrylate having <NUM> Mw to <NUM> Mw, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, may comprise the polymeric polycarboxylate, preferably polyacrylate, in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% of a polycarboxylate, preferably polyacrylate of a polymeric polycarboxylate, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, may comprise the polymeric polycarboxylate, preferably polyacrylate, in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% of a polycarboxylate, preferably polyacrylate having <NUM> Mw to <NUM> Mw, based on the total weight amount of the aqueous foaming detergent composition.

By virtue of their superior solubility, preferred representatives of this group of polymeric polycarboxylate are the short-chain polyacrylates, which have average molecular weight (Mw), based on free acids, of <NUM>,<NUM>/mol to <NUM>,<NUM>/mol and, more particularly, <NUM>,<NUM>/mol to <NUM>,<NUM>/mol.

It should be understood that the aqueous foaming detergent composition can be free of a polymeric polycarboxylate.

According to one aspect the aqueous foaming detergent composition can be free of a polymeric polycarboxylate, except a polyacrylate.

A solvent, preferably water, can be added add. -% to the aqueous foaming detergent composition. The solvent content, such as the water content, of the aqueous foaming detergent composition is simply determined by subtracting the weight-% amounts of all the other components, based on the total weight of the aqueous foaming detergent composition, except the solvent, from <NUM> wt.

In the understanding of the present specification the C<NUM>-C<NUM> alcohols are not a solvent, but an active agent.

Suitable solvents include, but are not limited to, water, C<NUM> to C<NUM>-alcohols, glycols, glycol ethers, esters, and the like, or combinations thereof. Suitable alcohols include, but are not limited to, ethanol, isopropanol (propan-<NUM>-ol), glycerin, monoethanolamine (MEA), and the like, or combinations thereof.

Suitable glycols include, but are not limited to, ethylene glycol (monoethylene glycol or MEG), diethylene glycol (propylene glycol or butoxy diglycol or DEG), triethylene glycol (TEG), tetraethylene glycol (TETRA EG), glycerin, propylene glycol, dipropylene glycol, hexylene glycol, and the like, or combinations thereof. Preferably the composition may comprise at least two solvents and more preferred the composition may comprise water and hexylene glycol.

In some embodiments an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, may comprise the solvent, preferably water, in an amount of ≥ <NUM> wt. -%, preferably ≥ <NUM> wt. -% and further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, may comprise the solvent, preferably water, in an amount of ≥ <NUM> wt. -%, preferably ≥ <NUM> wt. -% and further preferred ≥ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

A diluted aqueous foaming detergent composition is obtainable by diluting a concentrated liquid composition with a solvent, preferably water, in a ratio of an aqueous foaming detergent composition, preferably a concentrated liquid composition, to solvent, preferably water, of <NUM> : <NUM> to <NUM> : <NUM>, preferably of <NUM> : <NUM> to <NUM> : <NUM>, in particular of <NUM> : <NUM> to <NUM> : <NUM>, and also preferred of <NUM> : <NUM> to <NUM> : <NUM>.

The solvent is not a C<NUM> to C<NUM> alcohol.

The chelating agent can be selected from the group of sodium gluconate, pentasodium salt of diethylenetriamine pentaacetic acid, sodium glucoheptonate, salts of ethylene diamine tetraacetic acid, salts of ethylene diamine tetraacetic acid, salts of hydroxyethyl ethylene diamine triacetic acid, salts of hydroxyethyl ethylene diamine triacetic acid, salts of nitrilotriacetic acid, salts of nitrilotriacetic acid, diethanolglycine sodium salt, ethanoldiglycine disodium salt, salts of hydroxymonocarboxylic acid compounds, salts of hydroxydicarboxylic acid compounds, salts of amine containing carboxylic acids, terasodium N,N-bis(carboxylatomethyl)-L-glutamate (GDLA) and mixtures thereof.

In particular preferred is at least one chelating agent that exhibits soil removal properties when used at a pH of at least <NUM> to <NUM> and more preferred at a pH in the range of <NUM> to <NUM>. The chelating agent is provided for tying up metals in the soil to assist in cleaning and detergency. The chelating agent can be provided as part of the solid alkaline composition. Exemplary chelating agent that exhibit soil removal properties at a pH of greater than <NUM> to <NUM> that can be used according to the invention include sodium gluconate, pentasodium salt of diethylenetriamine pentaacetic acid (available under the name Versenex <NUM>), sodium glucoheptonate, ethylene diamine tetraacetic acid (EDTA), salts of ethylene diamine tetraacetic acid, hydroxyethyl ethylene diamine triacetic acid (HEDTA), salts of hydroxyethyl ethylene diamine triacetic acid, nitrilotriacetic acid (NTA), salts of nitrilotriacetic acid, diethanolglycine sodium salt (DEG), ethanoldiglycine disodium salt (EDG), tetrasodium N,N-bis(carboxylatomethyl)-L-glutamate (GLDA), methyl glycine diacetic acid (MGDA) and mixtures thereof. Exemplary salts of ethylene diamine tetraacetic acid include disodium salts, tetrasodium salts, diammonium salts, and trisodium salts. An exemplary salt of hydroxyethyl ethylene diamine triacetic acid is the trisodium salt.

It should be understood that the chelating agent can include mixtures of different chelating agent agents.

In some embodiments an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, may comprise a chelating agent, preferably a gluconate, in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, may comprise a chelating agent, preferably a gluconate, in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, may comprise a tetrasodium N,N-bis(carboxylatomethyl)-L-glutamate (GLDA), in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, may comprise a tetrasodium N,N-bis(carboxylato-methyl)-L-glutamate (GLDA), in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, may comprise a methyl glycine diacetic acid (MGDA), in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -% and more preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, may comprise a methyl glycine diacetic acid (MGDA), in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, based on the total weight amount of the aqueous foaming detergent composition.

According to one aspect the aqueous foaming detergent composition can be free of a chelating agent.

According to one aspect the aqueous foaming detergent composition can be free of a chelating agent except gluconate.

According to one aspect the aqueous foaming detergent composition can be free of a chelating agent except tetrasodium N,N-bis(carboxylatomethyl)-L-glutamate (GLDA).

According to one aspect the aqueous foaming detergent composition can be free of a chelating agent except methyl glycine diacetic acid (MGDA).

In some embodiments, the aqueous foaming detergent composition may include at least one sequestering.

Exemplary commercially available sequestering agents for use with aqueous foaming detergent composition of the present invention may include, but are not limited to: sodium tripolyphosphate available from Innophos; Trilon A® available from BASF; Versene <NUM>®, Low NTA Versene ®, Versene Powder®, and Versenol <NUM>® all available from Dow; Dissolvine D-<NUM> available from Akzo; and sodium citrate.

In some embodiments, dipicolinic acid and/or phosphonic acid and corresponding salts thereof are suitable for use as sequestering agents with the methods of the invention.

Phosphonates are suitable for use as sequestering agents with the methods of the invention and can be selected from the group comprising <NUM>-aminoethylphosphonic acid (AEPn); dimethyl methylphosphonate (DMMP); <NUM>-hydroxy ethylidene-<NUM>,<NUM>-diphosphonic acid (HEDP); amino tris(methylene phosphonic acid) (ATMP); ethylenediamine tetra(methylene phosphonic acid) (EDTMP); tetramethylenediamine tetra(methylene phosphonic acid) TDTMP); hexamethylenediamine tetra(methylene phosphonic acid) (HDTMP); diethylenetriamine penta(methylene phosphonic acid) (DTPMP); phosphonobutane-tricarboxylic acid (PBTC); N-(phosphonomethyl)iminodiacetic acid (PMIDA); <NUM>-carboxyethyl phosphonic acid (CEPA); <NUM>-hydroxyphosphonocarboxylic acid (HPAA); amino-tris-(methylene-phosphonic acid) (AMP); and/or salts thereof.

Aminophosphonates are also suitable for use as sequestering agents with the methods of the invention and include ethylenediaminetetramethylene phosphonates, nitrilotrismethylene phosphonates, and diethylenetriamine-(pentamethylene phosphonate) for example. These aminophosphonates commonly contain alkyl or alkenyl groups with less than <NUM> carbon atoms.

In some embodiments, the aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, comprises in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and also preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, a sequestering agent, preferably phosphonobutane-tricarboxylic acid (PBTC), based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments, the aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, comprises in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and also preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, a sequestering agent, preferably phosphonobutane-tricarboxylic acid (PBTC), based on the total weight amount of the aqueous foaming detergent composition.

According to one aspect the aqueous foaming detergent composition can be free of a sequestering agent.

According to one aspect the aqueous foaming detergent composition can be free of a sequestering agent except phosphonobutane-tricarboxylic acid (PBTC).

In some embodiments, a penetrant may be used with the aqueous foaming detergent composition of the present invention.

In some embodiments, the penetrant is water miscible.

Examples of suitable penetrants include, but are not limited to short chain ethoxylated alcohols and phenol (having <NUM>-<NUM> ethoxylate groups). Organic solvents are also suitable penetrants. Examples of suitable organic solvents, for use as a penetrant, include esters, ethers, ketones, amines, and nitrated and chlorinated hydrocarbons.

Ethoxylated alcohols are also suitable for use with the methods of the present invention. Examples of ethoxylated alcohols include, but are not limited to, alky, aryl, and alkylaryl alkloxylates. These alkloxylates may be further modified by capping with chlorine-, bromine-, benzyl-, methyl-, ethyl-, propyl-, butyl- and alkyl-groups. Ethoxylated alcohols may be present in the foaming detergent composition from ≥ <NUM> wt% to ≥ <NUM> wt%.

Fatty acids are also suitable for use as penetrants in the methods of the present invention. Some non-limiting examples of fatty acids are C<NUM> to C<NUM> straight or branched fatty acids. In some embodiments, fatty acids used in the methods of the present invention are liquid at room temperature.

In some embodiments, a penetrant for use in the methods of the present invention includes water soluble glycol ethers. Examples of glycol ethers include dipropylene glycol methyl ether (available under the trade designation DOWANOL DPM from Dow Chemical Co. ), diethylene glycol methyl ether (available under the trade designation DOWANOL DM from Dow Chemical Co. ), propylene glycol methyl ether (available under the trade designation DOWANOL PM from Dow Chemical Co. ), and ethylene glycol monobutyl ether (available under the trade designation DOWANOL EB from Dow Chemical Co.

In some embodiments, the aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, comprises in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and also preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, a penetrant, preferably diethylene glycol monobutyl ether, based on the total weight amount of the aqueous foaming detergent composition.

In some embodiments, the aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, comprises in an amount of ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, preferably ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, further preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, and also preferred ≥ <NUM> wt. -% to ≤ <NUM> wt. -%, a penetrant, preferably diethylene glycol monobutyl ether, based on the total weight amount of the aqueous foaming detergent composition.

According to one aspect the aqueous foaming detergent composition can be free of a penetrant.

According to one aspect the aqueous foaming detergent composition can be free of a penetrant except diethylene glycol monobutyl ether.

The liquid foaming detergent composition can be presented in a concentrated liquid form. The concentrates include a liquid medium, preferably water, and relatively large concentrations of the active cleaning component or cleaning components. The concentrated liquid foaming detergent composition may have a pH in the range of <NUM> to <NUM>, preferably a pH in the range of <NUM> to <NUM> and more preferred a pH in the range of <NUM> to <NUM> and for the diluted liquid foaming detergent composition the pH may be adjusted to a pH of <NUM> to pH of <NUM>, preferably to a pH of <NUM> to <NUM> and more preferred a pH in the range of <NUM> to <NUM>.

As a solvent, preferably water is added to <NUM> wt. -% to the concentrated liquid foaming detergent composition, wherein the weight. -% of the components are based on the total weight of the concentrated liquid foaming detergent composition, and the weight. -% of all components of the foaming detergent composition are select so that it does not exceed <NUM> wt.

According to one aspect, a concentrated aqueous foaming detergent composition may comprise:.

According to one aspect an aqueous foaming detergent composition, preferably a concentrated aqueous foaming detergent composition, is provided comprising:.

The liquid foaming detergent composition can be present in form of a diluted or so called "ready-to-use" composition. The diluted compositions may be derived from a concentrated liquid foaming detergent composition, for example, by combining water, for example, deionized water, city or tap water, with said concentrate. The so called ready-to-use compositions may be treated to reduce hardness.

The source of alkalinity and addition of the solvent, preferably water, are provided so that the diluted liquid foaming detergent composition may have a pH in the range of <NUM> to <NUM> and more preferred a pH in the range of <NUM> to <NUM>.

According to one aspect, the concentrated liquid foaming detergent composition can be diluted with a solvent, preferably water, to an <NUM>,<NUM> wt. -% to <NUM> wt. -%, preferably to an <NUM>,<NUM> wt. -% to <NUM> wt. -%, diluted foaming detergent composition, also named "ready-to-use solution".

As a solvent, preferably water is added to <NUM> wt. -% to the diluted liquid foaming detergent composition, wherein the weight. -% of the components are based on the total weight of the diluted liquid foaming detergent composition, and the weight. -% of all components of the foaming detergent composition are select so that it does not exceed <NUM> wt.

According to one aspect, a diluted aqueous foaming detergent composition may comprise:
According to one aspect, a concentrated aqueous foaming detergent composition may comprise:.

According to another aspect, a diluted aqueous foaming detergent composition may comprise:.

According to one aspect an aqueous foaming detergent composition, preferably a diluted aqueous foaming detergent composition, is provided comprising:.

In some aspects, the present invention provides methods for removing soil from a surface. In some embodiments, the methods for removing soil from a surface include using a clean out of place (COP) or clean in place (CIP) cleaning process. The methods include applying to the surface a composition of the invention, preferably in form of foam.

The method for removing soil from a surface to be cleaned may comprises applying to the surface a liquid foaming detergent composition. According to another aspect the method for removing soil from a surface to be cleaned may comprises applying to the surface a concentrated liquid foaming detergent composition. According to another aspect the method for removing soil from a surface to be cleaned may comprises preferably applying to the surface a diluted liquid foaming detergent composition.

The method for removing soil from a surface to be cleaned may comprising:.

In some embodiments, the methods and compositions of the present invention are applied to surfaces which are normally cleaned using a clean out of place or in place cleaning technique. Examples of such surfaces include hard and soft surface, for example of upper outer and/or inner outer surfaces of materials such as ceramic, metal, plastic and/or glass, surface that came into contact with beverages and/or food, beverages such alcoholic or non-alcoholic beverages such as beer or milk, food such as meat, vegetables and/or grain-products. Other surfaces that can be cleaned are instruments and apparatus, for example used in sanitary or medical services, evaporators, heat exchangers, including tube-in-tube exchangers, direct steam injection, and plate-in-frame exchangers, heating coils including steam, flame or heat transfer fluid heated re-crystallizers, pan crystallizers, spray dryers, drum dryers, and tanks.

Additional surfaces capable of being cleaned using the methods and compositions of the present invention include, but are not limited to membranes, medical devices, laundry and/or textiles, and hard surfaces, e.g., walls, floors, dishes, flatware, pots and pans, heat exchange coils, ovens, fryers, smoke houses, sewer drain lines, and vehicles. In some embodiments, the surfaces may be cleaned using a clean in place method. The methods of the present invention may also be used to remove dust from air handling equipment, for example, from air conditioners and refrigeration heat exchangers. In other embodiments, the methods of the present invention may be used for drain line microbial control, e.g., to reduce or remove biofilm formation.

Exemplary industries in which the methods and compositions of the present invention may be used include, but are not limited to: the food and beverage industry, e.g., the dairy, cheese, sugar, and brewery industries; oil processing industry; industrial agriculture and ethanol processing; and the pharmaceutical manufacturing industry.

The methods and aqueous foaming detergent composition for soil removal from surfaces can be applied at reduced temperatures, e.g., from ≥ <NUM>° C to ≤ <NUM>° C, preferably at ≥ <NUM>° C to ≤ <NUM>° C, preferably ≥ <NUM>° C to ≤ <NUM>° C. The ability of stable foam formation and to clean at reduced temperatures, preferably at <NUM>° C results in energy and cost savings compared to traditional cleaning techniques that require increased temperatures. Further, the present invention provides for effective soil removal on surfaces that cannot withstand high temperatures.

It has also been found that the methods of the present invention provide for soil removal at reduced temperatures, and using reduced amounts of chemistry, compared to conventional cleaning methods. In some embodiments, the methods of the present invention use <NUM>% to <NUM>% less chemistry, e.g., source of alkalinity, than conventional cleaning methods. Thus, the methods of the present invention may effectively remove soil at both low temperatures, and using a low concentration of chemicals, providing both an energy savings and a reduction in the amount of chemistry consumed per cleaning.

In some aspects of the aqueous foaming detergent composition for use with the methods of the present invention are applied as stable foam to the surface for a sufficient amount of time such that the composition penetrates into the soil to be removed.

In some embodiments, the aqueous foaming detergent composition for use with the methods of the present invention is applied as stable foam to the surface to be cleaned for <NUM> to <NUM> minutes. In some embodiments, the aqueous foaming detergent composition for use with the methods of the present invention is applied as stable foam to the surface to be cleaned for <NUM> to <NUM> minutes. In some embodiments, the aqueous foaming detergent composition for use with the methods of the present invention is applied as stable foam to the surface to be cleaned for <NUM> minutes. It is to be understood that any value between these ranges is to be encompassed by the methods of the present invention.

Another object is a foam comprising the components of the liquid foaming detergent composition.

The foam stability allows an improved cleaning effect, because the foam as such can be considered as a carrier for the cleaning solution. It ensures that the solution can also adhere to vertical surface and ceilings. As a result, longer contact is achieved between the cleaning solution and the surface to be cleaned. The foam layer on the cleaning agent film has a repository effect, i.e. through destruction of further foam bubbles new cleaning agent solution is constantly transported to the surface.

The following non-limiting examples illustrate certain advantages of the present invention.

The compositions of examples E1 to E7 of the invention and comparative examples C1 to C6 were prepared by mixing the components as mentioned in tables I and II below, wherein the compositions of tables I and II below are additional diluted with demineralized water.

This test method provides a basis to assess the relation of volume liquid to volume foam.

The compositions of examples E1 to E7 of the invention and comparative examples C1 to C6 were prepared by mixing the components as mentioned in table I and II below at <NUM>° C. The obtained compositions of tables I and II are then additional diluted by demineralized water to a <NUM>% (w/w).

The tests were performed for a <NUM>% (w/w) composition at <NUM>° C and <NUM>% relative humidity.

The demineralized water (demin. water) is produced by a process of distillation and has an electrical conductivity of not more than <NUM>/cm and total dissolved solids of less than <NUM>/liter. Distillation involves boiling the water and then condensing the vapor into a clean container, leaving solid contaminants behind.

The detergent compositions of examples E1 to E7 and Comparative examples C1 to C6 are further diluted with addition of demin. water to a <NUM>% (w/w) detergent composition. Each <NUM>% (w/w) detergent compositions of examples E1 to E7 and Comparative examples C1 to C6 are tested in a Dynamic Foam Analyzer DFA <NUM> Krüss; wherein <NUM> of each <NUM>% (w/w) detergent compositions of examples E1 to E7 and Comparative examples C1 to C6 are filed into a CY <NUM> Glass Column. The CY <NUM> Glass Column has a diameter <NUM> and a height of <NUM>. Then oxygen is blown through a frit for <NUM> sec and a flow rate of <NUM>/min to generate foam.

The reduction of foam height and liquid loss for each detergent compositions of examples E1 to E7 and Comparative examples C1 to C6 are recorded for <NUM> sec (Decay Phase).

Tables III and IV show the liquid loss of the foam, measured as liquid height in the CY <NUM> Glass Column, for each detergent compositions of examples E1 to E7 and Comparative examples C1 to C6.

The liquid high indicates the liquid loss at <NUM> seconds for each <NUM>% (w/w) detergent compositions of examples E1 to E7 and comparative examples C1 to C6. It can be seen from tables III and IV that the liquid loss of the <NUM>% (w/w) detergent compositions of Examples E1 to E7 is significant less compared to the <NUM>% (w/w) detergent compositions of comparative examples C1 to C6.

Thus, the volume liquid loss test clearly demonstrates that the foam of the <NUM>% (w/w) aqueous foaming detergent composition E1 to E7 according to the present invention compared to the <NUM>% (w/w) aqueous foaming detergent composition of comparative examples C1 to C6 have a significant decreased liquid loss - see <FIG> - and a much better foam stability.

The water liquid loss of the <NUM>% (w/w) detergent compositions of examples E1 to E7 after <NUM> is below <NUM>. However, the water liquid loss of the <NUM>% (w/w) detergent compositions of the comperative examples C1 to C6 is after <NUM> closed to the maximum of liquid loss, which is <NUM>.

Further, the results of tables III and IV and <FIG> demonstrate for the <NUM>% (w/w) detergent compositions of examples Examples <NUM> to <NUM> of the present invention an improved rewetting foam effect. The test further demonstrate that the foam of the <NUM>% (w/w) detergent compositions of comparative examples C1 to C6 dries over time, which leads to an decreased cleaning effect compared to the <NUM>% (w/w) detergent compositions of examples E1 to E7.

For each <NUM>% (w/w) compositions of examples E1 to E7 according to the invention and <NUM>% (w/w) compositions of comparative examples C1 to C6 the foam high in [mm] and liquid high in [mm] as recorded in tables V and VI are measured in the CY <NUM> Glass Column of the Dynamic Foam Analyzer DFA <NUM> Krüss. <NUM> of each <NUM>% (w/w) detergent compositions of examples E1 to E7 and Comparative examples C1 to C6 are filed into a CY <NUM> Glass Column having a diameter <NUM> and a height of <NUM>. Then oxygen is blown through the frit of the CY <NUM> Glass Column at a flow rate of <NUM>/min until a foam height of <NUM> is reached.

Thereafter the foam high in [mm] and liquid high in [mm] were recorded for the <NUM>% (w/w) compositions of examples E1 to E7 and comparative examples C1 to C6 starting after <NUM> for a total time <NUM>. The results are recored from <NUM> to <NUM>. The liquid high indicates the loss of foam liquid and the foam high indicates the foam stability over time.

It can be seen from tables V and VI and <FIG> and <FIG> that the decrease of foam high and loss of water for the <NUM>% (w/w) compositions of Examples E1 to E7 are significant less compared with the <NUM>% (w/w) compositions of comparative examples C1 to C6.

The lower the loss of water the better the moister content of the foam. Further the higher the foam stability the better the cleaning performance. However, the combination of decreased water liquid loss and increased foam stability provides an significant improved foam with respect of cleaning performance, since the higher moistening content of the foam prolongs the activity period of the cleaning components.

Thus, the volume liquid to volume foam test clearly demonstrates that the foam of the <NUM>% (w/w) aqueous foaming detergent compositions E1 to E7 according to the present invention compared to the <NUM>% (w/w) detergent compositions of C1 to C6 have a significant decreased foam liquid loss. Further the foam stability and moistening content of the <NUM>% (w/w) foam compositions of Examples <NUM> to <NUM> are significant improved as indicated in <FIG> and <FIG>.

In <FIG> it can be seen that the <NUM>% (w/w) foam detergent composition of example E1 is practically stable over time with respect of foam stability and water liquid loss compared to the <NUM>% (w/w) compositions of C1 to C6.

Claim 1:
An aqueous foaming detergent composition comprising:
- at least one source of alkalinity;
- at least one alkyl sulfate surfactant of a C<NUM>-C<NUM>-alkyl sulfate;
- at least one alkyl (EO)n/(PO)m-alkoxylate surfactant of a C<NUM>-C<NUM>-alkyl (EO)n/(PO)m-alkoxylate, wherein n = <NUM> to <NUM> and m = <NUM> to <NUM>;
- at least one alkyl dialkylaminoacetate surfactant of a C<NUM>-C<NUM>-alkyl C<NUM>-C<NUM>-dialkylamino acetate;
- at least one alkyl iminodipropionate surfactant of a C<NUM>-C<NUM>-alkyl iminodipropionate;
- at least one alkyl iminodiglycinate surfactant of a C<NUM>-C<NUM>-alkyl iminodiglycinate;
- at least one alcohol of a C<NUM>-C<NUM> alcohol; and
- a solvent.