Patent Description:
Benefit agents, such as perfumes, silicones, waxes, flavors, vitamins and fabric softening agents, are expensive and generally less effective when employed at high levels in personal care compositions, cleaning compositions, and fabric care compositions. As a result, there is a desire to maximize the effectiveness of such benefit agents. One method of achieving such objective is to improve the delivery efficiencies of such benefit agents. Unfortunately, it is difficult to improve the delivery efficiencies of benefit agents as such agents may be lost do to the agents' physical or chemical characteristics, or such agents may beincompatible with other compositional components or the situs that istreated.

Accordingly, there is a need for a benefit agent containing delivery particle that provides improved benefit agent delivery efficiency.

<CIT> relates to perfume delivery systems in cleaning and fabric conditioning compositions, for controlled release of perfume.

The present invention relates to processes according to the claims.

As used herein "consumer product" means baby care, beauty care, fabric & home care, family care, feminine care, health care, snack and/or beverage products or devices intended to be used or consumed in the form in which it is sold, and not intended for subsequent commercial manufacture or modification. Such products include but are not limited to diapers, bibs, wipes; products for and/or methods relating to treating hair (human, dog, and/or cat), including, bleaching, coloring, dyeing, conditioning, shampooing, styling; deodorants and antiperspirants; personal cleansing; cosmetics; skin care including application of creams, lotions, and other topically applied products for consumer use; and shaving products, products for and/or methods relating to treating fabrics, hard surfaces and any other surfaces in the area of fabric and home care, including: air care, car care, dishwashing, fabric conditioning (including softening), laundry detergency, laundry and rinse additive and/or care, hard surface cleaning and/or treatment, and other cleaning for consumer or institutional use; products and/or methods relating to bath tissue, facial tissue, paper handkerchiefs, and/or paper towels; tampons, feminine napkins; products and/or methods relating to oral care including toothpastes, tooth gels, tooth rinses, denture adhesives, tooth whitening; over-the-counter health care including cough and cold remedies, pain relievers, RX pharmaceuticals, pet health and nutrition, and water purification; processed food products intended primarily for consumption between customary meals or as a meal accompaniment (non-limiting examples include potato chips, tortilla chips, popcorn, pretzels, corn chips, cereal bars, vegetable chips or crisps, snack mixes, party mixes, multigrain chips, snack crackers, cheese snacks, pork rinds, corn snacks, pellet snacks, extruded snacks and bagel chips); and coffee.

As used herein, the term "cleaning composition" includes, unless otherwise indicated, granular or powder-form all-purpose or "heavy-duty" washing agents, especially cleaning detergents; liquid, gel or paste-form all-purpose washing agents, especially the so-called heavy-duty liquid types; liquid fine-fabric detergents; hand dishwashing agents or light duty dishwashing agents, especially those of the high-foaming type; machine dishwashing agents, including the various tablet, granular, liquid and rinse-aid types for household and institutional use; liquid cleaning and disinfecting agents, including antibacterial hand-wash types, cleaning bars, mouthwashes, denture cleaners, dentifrice, car or carpet shampoos, bathroom cleaners; hair shampoos and hair-rinses; shower gels and foam baths and metal cleaners; as well as cleaning auxiliaries such as bleach additives and "stain-stick" or pre-treat types, substrate-laden products such as dryer added sheets, dry and wetted wipes and pads, nonwoven substrates, and sponges; as well as sprays and mists.

As used herein, the term "fabric care composition" includes, unless otherwise indicated, fabric softening compositions, fabric enhancing compositions, fabric freshening compositions and combinations there of.

As used herein, the phrase "benefit agent containing delivery particle" encompasses microcapsules including perfume microcapsules.

As used herein, the terms "particle", "benefit agent containing delivery particle", "capsule" and "microcapsule" are synonymous.

As used herein, the articles including "a" and "an" when used in a claim, are understood to mean one or more of what is claimed or described.

As used herein, the terms "include", "includes" and "including" are meant to be non-limiting.

The test methods disclosed in the Test Methods Section of the present application should be used to determine the respective values of the parameters of Applicants' inventions.

Applicants discovered that the problem of achieving effective and efficient benefit agent delivery can be solved in an economical manner when a benefit agent containing delivery particle, comprising a core material and a wall material that surrounds said core material and a certain combination of physical and chemical characteristics is employed. Such physical and chemical characteristics are defined by the Volume Weighted Fracture Strength. The delivery effectiveness and efficiency can be further tailored by selecting particles having the following Volume Weighted Fracture Strengths as listed for each application:.

In short, the level of benefit at any one point may be tailored by selecting the desired amount type of each class of benefit agent containing delivery particle.

The particle composition used in the process of the invention comprises <NUM>% to <NUM>% by volume weight of the particles have a volume weighted fracture strength from <NUM> MPa to <NUM> MPa, with the proviso that the sum of the percentage of the Type <NUM>, <NUM>, <NUM> and <NUM> Benefit Agent Containing Delivery Particles is always <NUM>% - such sum cannot exceed or be less than <NUM>%.

In one aspect, when the aforementioned particle composition is employed in a consumer product, for example a liquid consumer product, the particle composition may have a deposition of at least <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM> %, <NUM>%, <NUM>%, <NUM>%, or even <NUM>%.

In one aspect, when the aforementioned particle composition is employed in a consumer product, for example a liquid consumer product, the particle composition may have less than <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM> % or even <NUM>% leakage of the encapsulated benefit agent from the microcapsules of said particle composition into said consumer product.

The particles' wall material comprises a material selected from the group consisting of polyacrylates; reaction products of one or more amines with one or more aldehydes including urea cross-linked with formaldehyde or gluteraldehyde, melamine cross-linked with formaldehyde; and mixtures thereof. In one aspect, the wall material comprises melamine cross-linked with formaldehyde.

The particles used in the process according to the invention comprises perfume raw materials as core materials. Useful further core materials include silicone oils, waxes, hydrocarbons, higher fatty acids, essential oils, lipids, skin coolants, vitamins, sunscreens, antioxidants, glycerine, catalysts, bleach particles, silicon dioxide particles, malodor reducing agents, odor-controlling materials, chelating agents, antistatic agents, softening agents, insect and moth repelling agents, colorants, antioxidants, chelants, bodying agents, drape and form control agents, smoothness agents, wrinkle control agents, sanitization agents, disinfecting agents, germ control agents, mold control agents, mildew control agents, antiviral agents, drying agents, stain resistance agents, soil release agents, fabric refreshing agents and freshness extending agents, chlorine bleach odor control agents, dye fixatives, dye transfer inhibitors, color maintenance agents, optical brighteners, color restoration/rejuvenation agents, anti-fading agents, whiteness enhancers, anti-abrasion agents, wear resistance agents, fabric integrity agents, anti-wear agents, anti-pilling agents, defoamers and anti-foaming agents, UV protection agents for fabrics and skin, sun fade inhibitors, anti-allergenic agents, enzymes, water proofing agents, fabric comfort agents, shrinkage resistance agents, stretch resistance agents, stretch recovery agents, skin care agents, glycerin, and natural actives such as aloe vera, vitamin E, shea butter, cocoa butter, and the like, brighteners, antibacterial actives, antiperspirant actives, cationic polymers, dyes and mixtures thereof. In one aspect, said perfume raw material is selected from the group consisting of alcohols, ketones, aldehydes, esters, ethers, nitriles alkenes. In one aspect the core material comprises a perfume. In one aspect, said perfume comprises perfume raw materials selected from the group consisting of alcohols, ketones, aldehydes, esters, ethers, nitriles alkenes and mixtures thereof. In one aspect, said perfume may comprise a perfume raw material selected from the group consisting of perfume raw materials having a boiling point (B. ) lower than about <NUM> and a ClogP lower than about <NUM>, perfume raw materials having a B. of greater than about <NUM> and a ClogP of greater than about <NUM>, perfume raw materials having a B. of greater than about <NUM> and a ClogP lower than about <NUM>, perfume raw materials having a B. lower than about <NUM> and a ClogP greater than about <NUM> and mixtures thereof. Perfume raw materials having a boiling point B. lower than about <NUM> and a ClogP lower than about <NUM> are known as Quadrant I perfume raw materials, perfume raw materials having a B. of greater than about <NUM> and a ClogP of greater than about <NUM> are known as Quadrant IV perfume raw materials, perfume raw materials having a B. of greater than about <NUM> and a ClogP lower than about <NUM> are known as Quadrant II perfume raw materials, perfume raw materials having a B. lower than about <NUM> and a ClogP greater than about <NUM> are known as a Quadrant III perfume raw materials. In one aspect, said perfume comprises a perfume raw material having B. of lower than about <NUM>. In one aspect, said perfume comprises a perfume raw material selected from the group consisting of Quadrant I, II, III perfume raw materials and mixtures thereof. In one aspect, said perfume comprises a Quadrant III perfume raw material. Suitable Quadrant I, II, III and IV perfume raw materials are disclosed in <CIT>.

In one aspect, said perfume comprises a Quadrant IV perfume raw material. While not being bound by theory, it is believed that such Quadrant IV perfume raw materials can improve perfume odor "balance". Said perfume may comprise, based on total perfume weight, less than about <NUM>%, less than about <NUM>%, or even less than about <NUM>% of said Quadrant IV perfume raw material.

In one aspect, said benefit agent delivery particles' core material comprises:.

The perfume raw materials and accords may be obtained from one or more of the following companies Firmenich (Geneva, Switzerland), Givaudan (Argenteuil, France), IFF (Hazlet, NJ), Quest (Mount Olive, NJ), Bedoukian (Danbury, CT), Sigma Aldrich (St. Louis, MO), Millennium Specialty Chemicals (Olympia Fields, IL), Polarone International (Jersey City, NJ), Fragrance Resources (Keyport, NJ), and Aroma & Flavor Specialties (Danbury, CT).

The particle used in the process of the present invention may be made via the teachings of <CIT> and/or <CIT> and the examples disclosed herein.

Anionic emulsifiers are typically used during the particle making process to emulsify the benefit agent prior to microcapsule formation. While not being bound by theory, it is believed that the anionic materials adversely interact with the cationic surfactant actives that are often found in compositions such as fabric care compositions - this may yield an aesthetically unpleasing aggregation of particles that are employed in said composition. In addition to the unacceptable aesthetics, such aggregates may result in rapid phase separation of the particles from the bulk phase. Applicants discovered that such aggregates can be prevented by the addition of certain aggregate inhibiting materials including materials selected from the group consisting of salts, polymers and mixtures thereof. Useful aggregate inhibiting materials include, divalent salts such as magnesium salts, for example, magnesium chloride, magnesium acetate, magnesium phosphate, magnesium formate, magnesium boride, magnesium titanate, magnesium sulfate heptahydrate; calcium salts, for example, calcium chloride, calcium formate, calcium calcium acetate, calcium bromide; trivalent salts, such as aluminum salts, for example, aluminum sulfate, aluminum phosphate, aluminum chloride n-hydrate and polymers that have the ability to suspend anionic particles such as soil suspension polymers, for example, (polyethylene imines, alkoxylated polyethylene imines, polyquaternium-<NUM> and polyquaternium-<NUM>.

Benefit agent containing delivery particles can be manufactured and can be subsequently coated with a material to reduce the rate of leakage of the benefit agent from the particles when the particles are subjected to a bulk environment containing, for example, surfactants, polymers, and solvents. Non-limiting examples of coating materials that can serve as barrier materials include materials selected from the group consisting of polyvinyl pyrrolidone homopolymer, and its various copolymers with styrene, vinyl acetate, imidazole, primary and secondary amine containing monomers, methyl acrylate, polyvinyl acetal, maleic anhydride; polyvinyl alcohol homopolymer, and its various copolymers with vinyl acetate, <NUM>-acrylamide-<NUM>-methylpropane sulfonate, primary and secondary amine containing monomers, imidazoles, methyl acrylate; polyacrylamides; polyacrylic acids; microcrystalline waxes; paraffin waxes; modified polysaccharides such as waxy maize or dent corn starch, octenyl succinated starches, derivatized starches such as hydroxyethylated or hydroxypropylated starches, carrageenan, guar gum, pectin, xanthan gum; modified celluloses such as hydrolyzed cellulose acetate, hydroxy propyl cellulose, methyl cellulose, and the like; modified proteins such as gelatin; hydrogenated and non-hydrogenated polyalkenes; fatty acids; hardened shells such as urea crosslinked with formaldehyde, gelatin-polyphosphate, melamine-formaldehyde, polyvinyl alcohol cross-linked with sodium tetraborate or gluteraldehyde; latexes of styrene-butadiene, ethyl cellulose, inorganic materials such as clays including magnesium silicates, aluminosilicates; sodium silicates, and the like; and mixtures thereof. Such materials can be obtained from CP Kelco Corp. of San Diego, California, USA; Degussa AG or Dusseldorf, Germany; BASF AG of Ludwigshafen, Germany; Rhodia Corp. of Cranbury, New Jersey, USA; Baker Hughes Corp. of Houston, Texas, USA; Hercules Corp. of Wilmington, Delaware, USA; Agrium Inc. of Calgary, Alberta, Canada, ISP of New Jersey U. For particles that are employed in a fabric conditioning composition, the coating material comprises sodium silicate. While not being bound by theory, it is believed that sodium silicate's solubility at high pH, but poor solubility at low pH makes it an ideal material for use on particles that may be used in compositions that are formulated at pH below <NUM> but used in an environment wherein the pH is greater or equal to <NUM>. The benefit agent containing delivery particles can be made by following the procedure described in <CIT>.

Suitable equipment for use in the processes disclosed herein may include continuous stirred tank reactors, homogenizers, turbine agitators, recirculating pumps, paddle mixers, plough shear mixers, ribbon blenders, vertical axis granulators and drum mixers, both in batch and, where available, in continuous process configurations, spray dryers, and extruders. Such equipment can be obtained from Lodige GmbH (Paderborn, Germany), Littleford Day, Inc. (Florence, Kentucky, U. ), Forberg AS (Larvik, Norway), Glatt Ingenieurtechnik GmbH (Weimar, Germany), Niro (Soeborg, Denmark), Hosokawa Bepex Corp. (Minneapolis, Minnesota, USA), Arde Barinco (New Jersey, USA).

In one aspect, benefit agent containing delivery particles may be combined with a formaldehyde scavenger. In one aspect, such benefit agent containing delivery particles may comprise the benefit agent containing delivery particles of the present invention. Suitable formaldehyde scavengers include materials selected from the group consisting of sodium bisulfite, urea, ethylene urea, cysteine, cysteamine, lysine, glycine, serine, carnosine, histidine, glutathione, <NUM>,<NUM>-diaminobenzoic acid, allantoin, glycouril, anthranilic acid, methyl anthranilate, methyl <NUM>-aminobenzoate, ethyl acetoacetate, acetoacetamide, malonamide, ascorbic acid, <NUM>,<NUM>-dihydroxyacetone dimer, biuret, oxamide, benzoguanamine, pyroglutamic acid, pyrogallol, methyl gallate, ethyl gallate, propyl gallate, triethanol amine, succinamide, thiabendazole, benzotriazol, triazole, indoline, sulfanilic acid, oxamide, sorbitol, glucose, cellulose, poly(vinyl alcohol), partially hydrolyzed poly(vinylformamide), poly(vinyl amine), poly(ethylene imine), poly(oxyalkyleneamine), poly(vinyl alcohol)-co-poly(vinyl amine), poly(<NUM>-aminostyrene), poly(l-lysine), chitosan, hexane diol, ethylenediamine-N,N'-bisacetoacetamide, N-(<NUM>-ethylhexyl)acetoacetamide, <NUM>-benzoylacetoacetamide, N-(<NUM>-phenylpropyl)acetoacetamide, lilial, helional, melonal, triplal, <NUM>,<NUM>-dimethyl-<NUM>,<NUM>-cyclohexanedione, <NUM>,<NUM>-dimethyl-<NUM>-cyclohexenecarboxaldehyde, <NUM>,<NUM>-dimethyl-<NUM>,<NUM>-dioxan-<NUM>,<NUM>-dione, <NUM>-pentanone, dibutyl amine, triethylenetetramine, ammonium hydroxide, benzylamine, hydroxycitronellol, cyclohexanone, <NUM>-butanone, pentane dione, dehydroacetic acid, or a mixture thereof. These formaldehyde scavengers may be obtained from Sigma/Aldrich/Fluka of St. or PolySciences, Inc. of Warrington, PA U.

Such formaldehyde scavengers are typically combined with a slurry containing said benefit agent containing delivery particle, at a level, based on total slurry weight, of from about <NUM> wt. % to about <NUM> wt. %, from about <NUM> wt. % to about <NUM> wt. % or even from about <NUM> wt. % to about <NUM> wt.

In one aspect, such formaldehyde scavengers may be combined with a product containing a benefit agent containing delivery particle, said scavengers being combined with said product at a level, based on total product weight, of from about <NUM>% to about <NUM>%, alternatively from about <NUM>% to about <NUM>%, alternatively from about <NUM>% to about <NUM>% of the product formulation,.

In another aspect, such formaldehyde scavengers may be combined with a slurry containing said benefit agent containing delivery particle, at a level, based on total slurry weight, of from about <NUM> wt. % to about <NUM> wt. %, from about <NUM> wt. % to about <NUM> wt. % or even from about <NUM> wt. % to about <NUM> wt. % and said slurry may be added to a product matrix to which addition an identical or different scavenger may be added at a level, based on total product weight, of from about <NUM>% to about <NUM>%, alternatively from about <NUM>% to about <NUM>%, alternatively from about <NUM>% to about <NUM>% of the product formulation,.

In one aspect, one or more of the aforementioned formaldehyde scavengers may be combined with a liquid fabric enhancing product containing a benefit agent containing delivery particle at a level, based on total liquid fabric enhancing product weight, of from <NUM>% to about <NUM>%, alternatively from about <NUM>% to about <NUM>%, alternatively from about <NUM>% to about <NUM>% of the product formulation.

In one aspect, such formaldehyde scavengers may be combined with a liquid laundry detergent product containing a benefit agent containing delivery particle, said scavengers being selected from the group consisting of sodium bisulfite, urea, ethylene urea, cysteine, cysteamine, lysine, glycine, serine, carnosine, histidine, glutathione, <NUM>,<NUM>-diaminobenzoic acid, allantoin, glycouril, anthranilic acid, methyl anthranilate, methyl <NUM>-aminobenzoate, ethyl acetoacetate, acetoacetamide, malonamide, ascorbic acid, <NUM>,<NUM>-dihydroxyacetone dimer, biuret, oxamide, benzoguanamine, pyroglutamic acid, pyrogallol, methyl gallate, ethyl gallate, propyl gallate, triethanol amine, succinamide, thiabendazole, benzotriazol, triazole, indoline, sulfanilic acid, oxamide, sorbitol, glucose, cellulose, poly(vinyl alcohol), partially hydrolyzed poly(vinylformamide), poly(vinyl amine), poly(ethylene imine), poly(oxyalkyleneamine), poly(vinyl alcohol)-co-poly(vinyl amine), poly(<NUM>-aminostyrene), poly(l-lysine), chitosan, hexane diol, ethylenediamine-N,N'-bisacetoacetamide, N-(<NUM>-ethylhexyl)acetoacetamide, <NUM>-benzoylacetoacetamide, N-(<NUM>-phenylpropyl)acetoacetamide, lilial, helional, melonal, triplal, <NUM>,<NUM>-dimethyl-<NUM>,<NUM>-cyclohexanedione, <NUM>,<NUM>-dimethyl-<NUM>-cyclohexenecarboxaldehyde, <NUM>,<NUM>-dimethyl-<NUM>,<NUM>-dioxan-<NUM>,<NUM>-dione, <NUM>-pentanone, dibutyl amine, triethylenetetramine, ammonium hydroxide, benzylamine, hydroxycitronellol, cyclohexanone, <NUM>-butanone, pentane dione, dehydroacetic acid and mixtures thereof, and combined with said liquid laundry detergent product at a level, based on total liquid laundry detergent product weight, of from about <NUM> wt. % to about <NUM> wt. %, from about <NUM> wt. % to about <NUM> wt. % or even from about <NUM> wt. % to about <NUM> wt.

In one aspect, such formaldehyde scavengers may be combined with a hair conditioning product containing a benefit agent containing delivery particle, at a level, based on total hair conditioning product weight, of from about <NUM> wt. % to about <NUM> wt. %, from about <NUM> wt. % to about <NUM> wt. % or even from about <NUM> wt. % to about <NUM> wt. , said selection of scavengers being identical to the list of scavengers in the previous paragraph relating to a liquid laundry detergent product.

A fabric treatment composition comprises, based on total fabric treatment composition weight, from <NUM> to <NUM>% of such particle.

Aspects of the invention include the use of the particles of the present invention in laundry detergent compositions (e.g., TIDE™), hard surface cleaners (e.g., MR CLEAN™), automatic dishwashing liquids (e.g., CASCADE™), dishwashing liquids (e.g., DAWN™), and floor cleaners (e.g., SWIFFER™). Non-limiting examples of cleaning compositions may include those described in <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; and <CIT>. The cleaning compositions disclosed herein are typically formulated such that, during use in aqueous cleaning operations, the wash water will have a pH of between about <NUM> and about <NUM>, or between about <NUM> and <NUM>. Liquid dishwashing product formulations typically have a pH between about <NUM> and about <NUM>. Cleaning products are typically formulated to have a pH of from about <NUM> to about <NUM>. Techniques for controlling pH at recommended usage levels include the use of buffers, alkalis, acids, etc., and are well known to those skilled in the art.

Fabric treatment compositions disclosed herein typically comprise a fabric softening active ("FSA"). Suitable fabric softening actives, include, but are not limited to, materials selected from the group consisting of quats, amines, fatty esters, sucrose esters, silicones, dispersible polyolefins, clays, polysaccharides, fatty oils, polymer latexes and mixtures thereof.

While not essential for the purposes of the present invention, the non-limiting list of adjuncts illustrated hereinafter are suitable for use in the instant compositions and may be desirably incorporated in certain embodiments of the invention, for example to assist or enhance performance, for treatment of the substrate to be cleaned, or to modify the aesthetics of the composition as is the case with perfumes, colorants, dyes or the like. It is understood that such adjuncts are in addition to the components that are supplied via the delivery particles and FSAs. The precise nature of these additional components, and levels of incorporation thereof, will depend on the physical form of the composition and the nature of the operation for which it is to be used. Suitable adjunct materials include, but are not limited to, polymers, for example cationic polymers, surfactants, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, and enzyme stabilizers, catalytic materials, bleach activators, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, additional perfume and perfume delivery systems, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments. In addition to the disclosure below, suitable examples of such other adjuncts and levels of use are found in <CIT>, <CIT>and <CIT>.

As stated, the adjunct ingredients are not essential to the cleaning and fabric care compositions. Thus, certain embodiments of the compositions do not contain one or more of the following adjuncts materials: bleach activators, surfactants, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, and enzyme stabilizers, catalytic metal complexes, polymeric dispersing agents, clay and soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, additional perfumes and perfume delivery systems, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments. However, when one or more adjuncts are present, such one or more adjuncts may be present as detailed below:.

If desired, the compositions herein can be catalyzed by means of a manganese compound. Such compounds and levels of use are well known in the art and include, for example, the manganese-based catalysts disclosed in <CIT>.

Cobalt bleach catalysts useful herein are known, and are described, for example, in <CIT> and <CIT>. Such cobalt catalysts are readily prepared by known procedures, such as taught for example in <CIT>, and <CIT>.

Compositions herein may also suitably include a transition metal complex of a macropolycyclic rigid ligand - abbreviated as "MRL". As a practical matter, and not by way of limitation, the compositions and cleaning processes herein can be adjusted to provide on the order of at least one part per hundred million of the benefit agent MRL species in the aqueous washing medium, and may provide from about <NUM> ppm to about <NUM> ppm, from about <NUM> ppm to about <NUM> ppm, or even from about <NUM> ppm to about <NUM> ppm, of the MRL in the wash liquor.

Preferred transition-metals in the instant transition-metal bleach catalyst include manganese, iron and chromium. Preferred MRL's herein are a special type of ultra-rigid ligand that is cross-bridged such as <NUM>,<NUM>-diethyl-<NUM>,<NUM>,<NUM>,<NUM>-tetraazabicyclo[<NUM>. <NUM>]hexa-decane.

Suitable transition metal MRLs are readily prepared by known procedures, such as taught for example in <CIT>, and <CIT>.

The compositions can be formulated into any suitable form and prepared by any process chosen by the formulator, non-limiting examples of which are described in <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>.

Compositions containing the benefit agent delivery particle disclosed herein are used to clean or treat a situs , i.e. a fabric. Typically at least a portion of the situs is contacted with a fabric treatment composition, diluted in a liquor , i.e. a wash liquor.

The situs may be optionally washed and/or rinsed before and/or after contact. In one aspect, a situs is optionally washed and/or rinsed, contacted with a particle according to the process of the present invention and then optionally washed and/or rinsed. For purposes of the present invention, washing includes but is not limited to, scrubbing, and mechanical agitation. The fabric may comprise most any fabric capable of being laundered or treated in normal consumer use conditions. Liquors that may comprise the disclosed compositions may have a pH of from about <NUM> to about <NUM>. Such compositions are typically employed at concentrations of from about <NUM> ppm to about <NUM>,<NUM> ppm in solution. When the wash solvent is water, the water temperature typically ranges from about <NUM> to about <NUM> and, when the situs comprises a fabric, the water to fabric ratio is typically from about <NUM>:<NUM> to about <NUM>:<NUM>.

It is understood that the test methods that are disclosed in the Test Methods Section of the present application should be used to determine the respective values of the parameters as described and claimed herein.

The "calculated logP" (ClogP) is determined by the fragment approach of Hansch and Leo (cf. , <NPL>, incorporated herein by reference). ClogP values may be calculated by using the "CLOGP" program available from Daylight Chemical Information Systems Inc. of Irvine, California U.

Boiling point is measured by ASTM method D2887-04a, "Standard Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography," ASTM International.

Volume weight fractions are determined via the method of single-particle optical sensing (SPOS), also called optical particle counting (OPC). Volume weight fractions are determined via a AccuSizer <NUM>/AD supplied by Particle Sizing Systems of Santa Barbara California, U.

The spread around the fracture strength to determine the volume fraction is determined as follows:
For particle batches with a mean particle sizes of about <NUM> a spread of about <NUM> is used, for particle batches with a mean particle sizes of about <NUM> and above, a spread of about <NUM> to <NUM> is used.

EXAMPLE <NUM>: <NUM> wt% Core/ <NUM> wt% Wall Urea Based Polyurea Capsule <NUM> grams of Urea (Sigma Aldrich of Milwaukee, WI) is dissolved in <NUM> deionized water. <NUM> gram of resorcinol (Sigma Aldrich of Milwaukee, WI) is added to the homogeneous urea solution. <NUM> of37wt% formaldehyde solution (Sigma Aldrich of Milwaukee, WI) is added to the solution, and the pH of the slurry is adjusted to <NUM> using IM sodium hydroxide solution (Sigma Aldrich of Milwaukee, WI). The reactants are allowed to sit at <NUM> for <NUM> hours. In a separate beaker, <NUM> grams of fragrance oil is added slowly to the urea-formaldehyde solution. The mixture is agitated using a Janke & Kunkel Laboretechnik mixer using a pitched, <NUM>-blade agitator to achieve a <NUM> micron mean oil droplet size distribution. The pH of the slurry is adjusted to <NUM> using <NUM> Hydrochloric Acid to initiate the condensation reaction. The solution is heated to <NUM> and allowed to react in a constant temperature water bath, while slowly agitating the contents of the mixture. The contents are allowed to react for <NUM> hours at <NUM>.

The Volume Average Fracture Strength Fracture is determined to be <NUM> MPa.

EXAMPLE <NUM>: <NUM>% Core/ 15wt% Wall Melamine based Polyurea capsule (illustrative) A first mixture is prepared by combining <NUM> grams of water and <NUM> grams of alkyl acrylate-acrylic acid copolymer ( Polysciences, Inc. of Warrington, Pennsylvania, USA). This first mixture is adjusted to pH <NUM> using acetic acid.

<NUM> grams of the capsule core material which comprise a fragrance oil is added to the first mixture at a temperature of <NUM> to form an emulsion. The ingredients to form the capsule wall material are prepared as follows: <NUM> grams of a corresponding capsule wall material copolymer pre-polymer (butylacrylate-acrylic acid copolymer) and <NUM> grams of water are combined and adjusted to pH <NUM>. To this mixture is added <NUM> grams of a partially methylated methylol melamine resin solution ("Cymel <NUM>", <NUM>% solids, Cytec). This mixture is added to the above described fragrance oil-in-water emulsion with stirring at a temperature of <NUM> degrees Centigrade.

High speed blending is used to achieve a volume-mean particle size of <NUM> micron. The temperature of the mixture is gradually raised to <NUM> degrees Centigrade, and is maintained at this temperature overnight with continuous stirring to initiate and complete encapsulation.

To form the acrylic acid-alkyl acrylate copolymer capsule wall, the alkyl group can be selected from ethyl, propyl, butyl, amyl, hexyl, cyclohexyl, <NUM>-ethylhexyl, or other alkyl groups having from one to about sixteen carbons, preferably one to eight carbons.

EXAMPLE <NUM>: <NUM>% Core / 10wt% Wall Melamine based Polyurea capsule (illustrative) A first mixture is prepared by combining <NUM> grams of water and <NUM> grams of alkyl acrylate-acrylic acid copolymer (Polysciences, Inc. of Warrington, Pennsylvania, USA). This first mixture is adjusted to pH <NUM> using acetic acid.

<NUM> grams of the capsule core material which comprise a fragrance oil is added to the first mixture at a temperature of <NUM> to form an emulsion. The ingredients to form the capsule wall material are prepared as follows: <NUM> grams of a corresponding capsule wall material copolymer pre-polymer (butylacrylate-acrylic acid copolymer) and <NUM> grams of water are combined and adjusted to pH <NUM>. To this mixture is added <NUM> grams of a partially methylated methylol melamine resin solution ("Cymel <NUM>", <NUM>% solids, Cytec). This mixture is added to the above described fragrance oil-in-water emulsion with stirring at a temperature of <NUM> degrees Centigrade. High speed blending is used to achieve a volume-mean particle size of <NUM> micron. The temperature of the mixture is gradually raised to <NUM> degrees Centigrade, and is maintained at this temperature overnight with continuous stirring to initiate and complete encapsulation.

EXAMPLE <NUM>: <NUM>% Core/ 20wt% Wall Melamine based Polyurea capsule (illustrative).

A first mixture is prepared by combining <NUM> grams of water and <NUM> grams of alkyl acrylate-acrylic acid copolymer (Polysciences, Inc. of Warrington, Pennsylvania, USA). This first mixture is adjusted to pH <NUM> using acetic acid.

<NUM> grams of the capsule core material which comprises a fragrance oil is added to the first mixture at a temperature of <NUM> to form an emulsion. The ingredients to form the capsule wall material are prepared as follows: <NUM> grams of a corresponding capsule wall material copolymer pre-polymer (butylacrylate-acrylic acid copolymer) and <NUM> grams of water are combined and adjusted to pH <NUM>. To this mixture is added <NUM> grams of a partially methylated methylol melamine resin solution ("Cymel <NUM>", <NUM>% solids, Cytec). This mixture is added to the above described fragrance oil-in-water emulsion with stirring at a temperature of <NUM> degrees Centigrade. High speed blending is used to achieve a volume-mean particle size of <NUM> micron. The temperature of the mixture is gradually raised to <NUM> degrees Centigrade, and is maintained at this temperature overnight with continuous stirring to initiate and complete encapsulation.

EXAMPLE <NUM>: <NUM>% Core/ 15wt% Wall Melamine based Polyurea capsule (illustrative).

A first mixture is prepared by combining <NUM> grams of water and <NUM> grams of alkyl acrylate-acrylic acid copolymer ( Polysciences, Inc. of Warrington, Pennsylvania, USA). This first mixture is adjusted to pH <NUM> using acetic acid.

<NUM> grams of the capsule core material which comprise a fragrance oil is added to the first mixture at a temperature of <NUM> to form an emulsion. The ingredients to form the capsule wall material are prepared as follows: <NUM> grams of a corresponding capsule wall material copolymer pre-polymer (butylacrylate-acrylic acid copolymer) and <NUM> grams of water are combined and adjusted to pH <NUM>. To this mixture is added <NUM> grams of a partially methylated methylol melamine resin solution ("Cymel <NUM>", <NUM>% solids, Cytec). This mixture is added to the above described fragrance oil-in-water emulsion with stirring at a temperature of <NUM> degrees Centigrade. High speed blending is used to achieve a volume-mean particle size of <NUM> microns. The temperature of the mixture is gradually raised to <NUM> degrees Centigrade, and is maintained at this temperature overnight with continuous stirring to initiate and complete encapsulation.

Non-limiting examples of product formulations containing microcapsules summarized in the following table.

Claim 1:
A process of using a consumer product for treating fabric, the process comprising contacting the fabric with a wash liquor which comprises the consumer product in diluted form, the consumer product being a fabric treatment composition comprising a particle composition formed of delivery particles comprising a core material and a wall material that surrounds said core material, wherein said particles' core material comprises perfume raw materials, and wherein said particles' wall material comprises a material selected from the group consisting of polyacrylates; reaction products of one or more amines with one or more aldehydes including urea cross-linked with formaldehyde or gluteraldehyde, melamine cross-linked with formaldehyde; and mixtures thereof,
wherein <NUM>% to <NUM>% by volume weight of the particles have a volume weighted fracture strength from <NUM> MPa to <NUM> MPa, with the proviso that the sum of the percentage of the particles having volume weighted fracture strength up to <NUM> MPa is always <NUM>%,
wherein the particle composition makes up <NUM>% to <NUM>% of the total weight of the consumer product mass.