Personal cleansing compositions with increased deposition of polyacrylate microcapsules

Patent metadata

Field	Value
Publication number	US-9162085-B2
Application number	US-201213439496-A
Country	US
Kind code	B2
Filing date	Apr 4, 2012
Priority date	Apr 7, 2011
Publication date	Oct 20, 2015
Grant date	Oct 20, 2015

Abstract

A personal cleansing composition that increases the deposition and retention of benefit agent containing polyacrylate microcapsules onto hair and/or skin. The personal cleansing composition is based on the combination of anionic charged polyacrylate microcapsules, cationic deposition polymers, detersive surfactant, and a carrier.

First claim

What is claimed is:

1. A personal cleansing composition comprising:
(a) a premix, the premix comprising from about 0.001% to about 10%, by weight of the personal cleansing composition, of an anionic charged polyacrylate microcapsule
and from about 0.01% to about 2% of a cationic deposition polymer;
(b) from about 2% to about 50% of a detersive surfactant; and
(c) a carrier.

2. The personal cleansing composition of claim 1 , wherein the anionic charged polyacrylate microcapsule comprises an anionic emulsifier and a polyacrylate microcapsule.

3. The personal cleansing composition of claim 2 , wherein the anionic emulsifier surrounds at least a part of the external surface of the polyacrylate microcapsule, or is physically or chemically bound to the external surface of the polyacrylate microcapsule.

4. The personal cleansing composition of claim 2 , wherein the anionic emulsifier and the polyacrylate microcapsule are mixed such that the weight ratio of the anionic emulsifier to the polyacrylate microcapsule is from about 1.0:40 to about 0.5:5.

5. The personal cleansing composition of claim 1 , wherein the anionic charged polyacrylate microcapsule and the cationic deposition polymer are mixed such that the weight ratio of the anionic charged polyacrylate microcapsule to the cationic deposition polymer is from about 1.0:0.01 to about 1.0:10.

6. The personal cleansing composition of claim 2 , wherein the anionic emulsifier is selected from the group consisting of: poly(meth)acrylic acid; copolymers of (meth)acrylic acids and its (meth)acrylates with C1-C22 alkyl; copolymers of (meth)acrylic acids and (meth)acrylamide; and mixtures thereof.

7. The personal cleansing composition of claim 1 , wherein the anionic charged polyacrylate microcapsule has a particle size of from about 2 microns to about 80 microns.

8. The personal cleansing composition of claim 2 , wherein the polyacrylate microcapsule has a core and a shell that encapsulates said core.

9. The personal cleansing composition of claim 8 , wherein the core comprises from about 6% to about 99.9% of a benefit agent.

10. The personal cleansing composition of claim 9 , wherein the benefit agent is selected from the group consisting of perfumes; brighteners; enzymes; skin care agents, moisturizers, thickeners; anti-microbial agents and mixtures thereof.

11. The personal cleansing composition of claim 1 , wherein the cationic deposition polymer is selected from the group consisting of starches, guar, cellulose, cassia, locust bean, Konjac, Tara, galactomanna, hydroxypropyltrimonium chloride modified guar guam, polyDADMAC, tapioca starch, and polyTriquat.

12. The personal cleansing composition of claim 1 , wherein the cationic deposition polymer is a water-soluble polymer with a charge density of from about 0.5 milliequivalents per gram to about 12 milliequivalents per gram, and wherein the cationic deposition polymer has a molecular weight of about 100,000 Daltons to about 5,000,000 Daltons.

13. The personal cleansing composition of claim 1 , wherein the detersive surfactant is anionic, nonionic, cationic, zwitterionic, amphoteric, soap, or combinations thereof.

14. The personal cleansing composition of claim 1 , wherein the carrier comprises water and water solutions of lower alkyl alcohols and polyhydric alcohols.

15. The personal cleansing composition of claim 1 , wherein the anionic charged polyacrylate microcapsule is contained in an agglomerate, and wherein the agglomerate comprises materials selected from the group consisting of silicas, citric acid, sodium carbonate, sodium sulfate, sodium chloride, and binders such as sodium silicates, modified celluloses, polyethylene glycols, polyacrylates, polyacrylic acids, zeolites, and mixtures thereof.

16. The personal cleansing composition of claim 1 , wherein the personal cleansing composition is in the form of a gel, and wherein the gel comprises less than about 45% water.

17. The personal cleansing composition of claim 2 , wherein the anionic emulsifier and the polyacrylate microcapsule are mixed such that the weight ratio of the anionic emulsifier to the polyacrylate microcapsule is from about 1.0:200 to about 1:20.

18. The personal cleansing composition of claim 2 , wherein the anionic emulsifier and the polyacrylate microcapsule are mixed such that the weight ratio of the anionic emulsifier to the polyacrylate microcapsule is from about 1.0:1000 to about 2:5.

19. The personal cleansing composition of claim 2 , wherein the anionic emulsifier is selected from the group consisting of: carboxyvinylpolymer; acrylate copolymers; Acrylic acid/vinyl ester copolymer/Acrylates/Vinyl Isodecanoate crosspolymer; Acrylates/Palmeth-25 Acrylate copolymer; Acrylate/Steareth-20 Itaconate copolymer; Acrylate/Celeth-20 Itaconate copolymer; Polystyrene sulphonate; copolymers of methacrylic acid and acrylamidomethylpropane sulfonic acid; copolymers of acrylic acid and acrylamidomethylpropane sulfonic acid; carboxymethycellulose; carboxy guar; copolymers of ethylene and maleic acid; acrylate silicone polymer; and mixtures thereof.

20. A personal cleansing composition comprising:
a premix, the premix comprising from about 0.001% to about 10% of an anionic polyacrylate microcapsule and
from about 0.01% to about 2% of a cationic deposition polymer;
from about 2% to about 50% of a detersive surfactant; and
a carrier;
wherein said anionic polyacrylate microcapsule comprises an oil soluble or dispersible core material and a wall material at least partially surrounding the core material, the microcapsule wall material comprising: the reaction product of a first composition in the presence of a second composition comprising an anionic emulsifier, the first composition comprising a reaction product of i) an oil soluble or dispersible amine with ii) a multifunctional acrylate or methacrylate monomer or oligomer, an oil soluble acid and an initiator, the anionic emulsifier comprising a water soluble or water dispersible acrylic acid alkyl acid copolymer, an alkali or alkali salt, and optionally a water phase initiator, whereby the reaction product of the first composition and second composition results in the formation of microcapsules.

Assignees

• Dihora Jiten Odhavji
• Brown Mark Anthony
• Procter & Gamble

Inventors

• Dihora Jiten Odhavji
• Brown Mark Anthony

Classifications

• A61P31/00

  Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics · CPC title

• A61K8/8152

  Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers · CPC title

• A61K8/11

  Encapsulated compositions · CPC title

• A61K8/463

  containing sulfuric acid derivatives, e.g. sodium lauryl sulfate · CPC title

• A61K2800/596

  Mixtures of surface active compounds · CPC title