Microcapsule compositions stabilized with viscosity control agent

Abstract

Disclosed are microcapsule compositions each comprising a microcapsule suspended in an aqueous phase and a viscosity control agent, wherein the viscosity control agent is an acrylate copolymer, a cationic acrylamide copolymer, or a polysaccharide. Also disclosed are consumer products containing such a microcapsule composition.

1 . A microcapsule composition comprising a microcapsule suspended in an aqueous phase and a viscosity control agent, wherein the viscosity control agent is an acrylate copolymer, a cationic acrylamide copolymer, or a polysaccharide. 
     
     
         2 . The microcapsule composition of  claim 1 , wherein the viscosity control agent is the acrylate copolymer selected from the group consisting of a copolymer of acrylic acid and acrylate, acrylate/C10-C30 alkyl acrylate cross-polymer, and combination thereof. 
     
     
         3 . The microcapsule composition of  claim 1 , wherein the microcapsule is an core-shell microcapsule having a microcapsule wall and a microcapsule core encapsulated by the microcapsule wall; the microcapsule wall is formed of an encapsulating polymer selected from the group consisting of a polyacrylate, polyurea, polyurethane, polyacrylamide, polyester, polyether, polyamide, poly(acrylate-co-acrylamide), starch, silica, gelatin and gum Arabic, alginate, chitosan, polylactide, poly(melamine-formaldehyde), poly(urea-formaldehyde), and combination thereof; and the microcapsule core contains an active material selected from the group consisting of a fragrance, pro-fragrance, flavor, malodor counteractive agent, vitamin or derivative thereof, anti-inflammatory agent, fungicide, anesthetic, analgesic, antimicrobial active, anti-viral agent, anti-infectious agent, anti-acne agent, skin lightening agent, insect repellant, animal repellent, vermin repellent, emollient, skin moisturizing agent, wrinkle control agent, UV protection agent, fabric softener active, hard surface cleaning active, skin or hair conditioning agent, flame retardant, antistatic agent, nanometer to micron size inorganic solid, polymeric or elastomeric particle, taste modulator, cell, probiotic, and combinations thereof. 
     
     
         4 . The microcapsule composition of  claim 3 , further comprising a polyvinyl alcohol, polystyrene sulfonate, carboxymethyl cellulose, sodium polystyrene sulfonate, alkylnaphthalenesulfonate formaldehyde condensate, polyvinylpyrrolidone, copolymer of vinyl pyrrolidone and quaternized dimethylaminoethyl methacrylate, or combination thereof, wherein the encapsulating polymer is a polyurea or polyurethane, the polyurea is a reaction product of a polyfunctional isocyanate and a polyfunctional amine in the presence of an alkylnaphthalenesulfonate formaldehyde condensate and polyvinylpyrrolidone, and the polyurethane is a reaction product of a polyfunctional isocyanate and a polyfunctional alcohol as a cross-linking agent in the presence of an alkylnaphthalenesulfonate formaldehyde condensate and polyvinylpyrrolidone. 
     
     
         5 . The microcapsule composition of  claim 4 , wherein the polyfunctional isocyanate is an aromatic polyfunctional isocyanate, aliphatic polyfunctional isocyanate, or combination thereof, the aromatic polyfunctional isocyanate containing a phenyl, tolyl, xylyl, naphthyl, or diphenyl moiety, or a combination thereof and the aliphatic polyfunctional isocyanate being a trimer of hexamethylene diisocyanate, a trimer of isophorone diisocyanate, a biuret of hexamethylene diisocyanate, or a combination thereof. 
     
     
         6 . The microcapsule composition of  claim 5 , wherein the aromatic polyfunctional isocyanate is selected from the group consisting of polymeric methylene diphenyl diisocyanate, polyisocyanurates of toluene diisocyanate, trimethylol propane-adducts of toluene diisocyanate, trimethylol propane-adducts of xylylene diisocyanate, and combinations thereof; and the aliphatic polyfunctional isocyanate is selected from the group consisting of dimers, biurets, symmetric trimers, asymmetric trimers of hexamethylene diisocyanate, and combinations thereof. 
     
     
         7 . The microcapsule composition of  claim 4 , wherein the polyfunctional amine is hexamethylenediamine, hexaethylenediamine, ethylenediamine, 1,3-diaminopropane, 1,4-diamino-butane, diethylenetriamine, pentaethylenehexamine, 1,6-diaminohexane, hydrazine, 1,4-diaminocyclohexane and 1,3-diamino-1-methylpropane, bis(3-aminopropyl)amine, bis(hexamethylene)triamine, tris(2-aminoethyl)amine, triethylene-tetramine, N,N′-bis(3-aminopropyl)-1,3-propanediamine, tetraethylenepentamine, branched polyethylenimine, chitosan, nisin, gelatin, 1,3-diamino-guanidine, 1,1-dimethylbiguanide, guanidine, arginine, lysine, ornithine, histidine, amino-2-methyl-1-propanol, or a combination thereof. 
     
     
         8 . The microcapsule composition of  claim 4 , wherein each of the alkylnaphthalenesulfonate formaldehyde condensate and polyvinylpyrrolidone, independently, is present at a level of 0.1% to 5% by weight of the microcapsule composition, and the ratio between the alkylnaphthalenesulfonate formaldehyde condensate and polyvinylpyrrolidone is 10:1 to 1:10. 
     
     
         9 . The microcapsule composition of  claim 3 , wherein the encapsulating polymer is a polyurea that is a reaction product of a polyfunctional isocyanate and a polyfunctional amine, the polyfunctional isocyanate contains a trimethylol propane-adduct of toluene diisocyanate or a trimethylol propane-adduct of xylylene diisocyanate, and the polyfunctional amine is diethylenetriamine, bis(3-aminopropyl)amine, bis(hexamethylene)triamine, tris(2-aminoethyl)amine, triethylenetetramine, N,N′-bis(3-aminopropyl)-1,3-propanediamine, tetraethylenepentamine, pentaethylenehexamine, branched polyethylenimine, chitosan, nisin, gelatin, 1,3-diaminoguanidine monohydrochloride, 1,1-dimethylbiguanide hydrochloride, or guanidine carbonate, or mixture thereof. 
     
     
         10 . The microcapsule composition of  claim 9 , the composition further comprising a polyvinyl alcohol, polystyrene sulfonate, carboxymethyl cellulose, sodium polystyrene sulfonate, alkylnaphthalenesulfonate formaldehyde condensate, copolymer of vinyl pyrrolidone and quaternized dimethylaminoethyl methacrylate, or combination thereof. 
     
     
         11 . The microcapsule composition of  claim 1 , the composition further comprising a stabilizing agent selected from the group consisting of hexamethylene diamine, hexaethylenediamine, ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, diethylenetriamine, pentaethylenehexamine, bis(3-aminopropyl)amine, bis(hexamethylene)-triamine, tris(2-aminoethyl)amine, triethylene-tetramine, N,N′-bis(3-aminopropyl)-1,3-propanediamine, tetraethylenepentamine, branched polyethylenimine, chitosan, nisin, gelatin, 1,3-diamino-guanidine, 1,1-dimethylbiguanide, guanidine, arginine, lysine, ornithine, histidine, amino-2-methyl-1-propanol, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, iodopropynyl butylcarbamate, phenoxyethanol, and combinations thereof. 
     
     
         12 . The microcapsule composition of  claim 1 , the composition further comprising a deposition aid selected from the group consisting of polyquaternium-4, polyquaternium-5, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-16, polyquaternium-22, polyquaternium-24, polyquaternium-28, polyquaternium-39, polyquaternium-44, polyquaternium-46, polyquaternium-47, polyquaternium-53, polyquaternium-55, polyquaternium-67, polyquaternium-68, polyquaternium-69, polyquaternium-73, polyquaternium-74, polyquaternium-77, polyquaternium-78, polyquaternium-79, polyquaternium-80, polyquaternium-81, polyquaternium-82, polyquaternium-86, polyquaternium-88, polyquaternium-101, polyvinylamine, polyethyleneimine, polyvinylamine and vinylformamide copolymer, and combinations thereof. 
     
     
         13 . The microcapsule composition of  claim 1 , the composition further comprising one or more free fragrances or one or more additional microcapsules. 
     
     
         14 . The microcapsule composition of  claim 3 , wherein the encapsulating polymer is melamine-formaldehyde polymer. 
     
     
         15 . The microcapsule composition of  claim 2 , wherein the acrylate copolymer is a copolymer of acrylic acid and acrylate present at a level of 0.1% to 5% by weight of the microcapsule composition. 
     
     
         16 . The microcapsule composition of  claim 15 , the copolymer of acrylic acid and acrylate is present at a level of 0.2% to 2% by weight of the microcapsule composition. 
     
     
         17 . The microcapsule composition of  claim 1 , wherein the viscosity control agent is the polysaccharide that is xanthan gum. 
     
     
         18 . The microcapsule composition of  claim 1 , wherein the composition is in a slurry or solid form. 
     
     
         19 . A consumer product comprising a microcapsule composition of  claim 1 . 
     
     
         20 . The consumer product of  claim 19 , wherein the consumer product is a shampoo, a hair conditioner, a hair rinse, a hair refresher, a hair fixative or styling aid, a hair bleach, a hair dye or colorant, a soap, a body wash, a cosmetic preparation, an all-purpose cleaner, a bathroom cleaner, a floor cleaner, a window cleaner, a bath tissue, a paper towel, a disposable wipe, a diaper rash cream or balm, a baby powder, a diaper, a bib, a baby wipe, an oral care product, a tooth paste, an oral rinse, an tooth whitener, a denture adhesive, a chewing gum, a breath freshener, an orally dissolvable strips, a chewable candy, a hard candy, a hand sanitizer, an anti-inflammatory balm, an anti-inflammatory ointment, an anti-inflammatory spray, a health care device, a dental floss, a toothbrush, a tampon, a feminine napkin, a personal care product, a sunscreen lotion, a sunscreen spray, a wax-based deodorant, a glycol type deodorant, a soap type deodorant, a facial lotion, a person wash, a body wash, a body lotion, a hand lotion, a body powder, a shave cream, a bath soak, an exfoliating scrub, a foot cream, a facial tissue, a cleansing wipe, a fabric care product, a fabric softener, a fabric refresher, an ironing water, a liquid laundry detergent, a powder detergent, a liquid dish detergent, an automatic dish detergent, a unit dose tablet or capsule, a scent booster, a drier sheet, a fine fragrance, a solid perfume, a powder foundation, a liquid foundation, an eye shadow, a lipstick or lip balm, an Eau De Toilette product, a deodorant, a rug deodorizer, a candle, a room deodorizer, a disinfectant, an aerosol antiperspirant, a stick antiperspirant, a roll-on antiperspirant, an emulsion spray antiperspirant, a clear emulsion stick antiperspirant, a soft solid antiperspirant, an emulsion roll-on antiperspirant, a clear emulsion stick antiperspirant, an opaque emulsion stick antiperspirant, a clear gel antiperspirant, a clear stick deodorant, a spray deodorant, a baked product, a bread, a dry biscuit, a cake, a cookie, a chip, a popcorn, a pretzel, an extruded snack, a breakfast cereal, a muesli bar, a precooked finished rice product, an alcoholic or non-alcoholic beverage, a spice blend, a soup, a sauce, a stew, a frozen entrée, a yogurt, an ice cream, a bean curd, a cheese, a soya protein product, a meat product, an egg product, a mayonnaise, a remoulade, a dressing, a seasoning preparation, a fruit preparation, or a vegetable preparation. 
     
     
         21 . (canceled)