Compositions Providing Delayed Release of Actives

Patent metadata

Field	Value
Publication number	US-2016184196-A1
Application number	US-201514971608-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Dec 16, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

Consumer products including compositions that include coated microcapsules, said coated microcapsules including a polymeric shell and a liquid core material encapsulated therein; and a metallic coating surrounding said microcapsules and methods related thereto.

First claim

What is claimed is:

1 . A consumer product comprising a composition, said composition comprising:
an adjunct material; and a plurality of coated microcapsules, said coated microcapsule comprising
i) a microcapsule comprising a polymeric shell and a liquid core material encapsulated therein; and
ii) a metallic coating surrounding said microcapsule;
wherein the metallic coating comprises particles of a first metal adsorbed on said polymeric shell and a film of a second metal formed thereon; and wherein the metallic coating has a maximum thickness of 1000 nm.

2 . The consumer product of claim 1 , wherein the liquid core material is selected from the group consisting of perfumes; brighteners; insect repellants; silicones; waxes; flavors; vitamins; fabric softening agents; depilatories; skin care agents; enzymes; probiotics; dye polymer conjugate; dye clay conjugate; perfume delivery system; sensates; attractants; anti-bacterial agents; dyes; pigments; bleaches; flavorants; sweeteners; waxes; pharmaceuticals; fertilizers; herbicides and mixtures thereof.

3 . The consumer product of claim 1 , wherein the polymeric shell comprises a polymeric material selected from the group consisting of polyacrylates, polyethylenes, polyamides, polystyrenes, polyisoprenes, polycarbonates, polyesters, polyureas, polyurethanes, polyolefins, polysaccharides, epoxy resins, vinyl polymers, urea cross-linked with formaldehyde or gluteraldehyde, melamine cross-linked with formaldehyde, gelatin-polyphosphate coacervates optionally cross-linked with gluteraldehyde, gelatin-gum arabic coacervates, cross-linked silicone fluids, polyamines reacted with polyisocyanates, acrylate monomers polymerised via free radical polymerization, silk, wool, gelatine, cellulose, alginate, proteins, and combinations thereof.

4 . The consumer product of claim 1 , wherein the polymeric shell comprises a polyacrylate.

5 . The consumer product of claim 1 , wherein the polymeric shell comprises a surface-modifying agent.

6 . The consumer product of claim 1 , wherein at least some of said particles are adsorbed on said surface-modifying agent.

7 . The consumer product of claim 1 , wherein the polymeric shell is obtained by an emulsification process in which a surface-modifying agent is employed as an emulsifier.

8 . The consumer product of claim 5 , wherein the surface-modifying agent is selected from cetyl trimethylammonium bromide (CTAB), poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), and mixtures thereof.

9 . The consumer product of claim 1 , wherein the particles of the first metal are nanoparticles.

10 . The consumer product of claim 9 , wherein said nanoparticles have a particle size of less than 100 nm.

11 . The consumer product of claim 1 , wherein the first metal is palladium, platinum, silver, gold, copper, nickel, tin or a combination thereof; and the second metal is silver, gold, nickel, copper or a combination thereof.

12 . The consumer product of claim 1 , wherein the density of said particles on the polymeric shell is such that said particles cover from 0.1 to 80% of the surface area of the polymeric shell.

13 . The consumer product of claim 1 , wherein (i) the first metal is platinum and the second metal is gold; (ii) the first metal is gold and the second metal is silver; or (iii) the first metal is gold and the second metal is copper.

14 . The consumer product of claim 1 , wherein the metallic coating has a maximum thickness of 500 nm; and the metallic coating has a minimum thickness of 1 nm.

15 . The consumer product of claim 1 , wherein the coated microcapsule has a particle size of from 0.1 micron to 500 microns.

16 . The consumer product of claim 1 , wherein the coated microcapsule retains more than 50% by weight of the liquid core material when tested under the Ethanol Stability Test described herein.

17 . The consumer product of claim 1 , wherein said composition is a personal care composition and, wherein said adjunct ingredient comprises a mixture of materials, said mixture comprising:
i) from 50% to 99.9%, by weight of the composition, of ethanol; and ii) from 0.5% to 50% of a fragrance.

18 . The consumer product of claim 1 , wherein:
i) the polymeric shell comprises a polyacrylate; ii) the polymeric shell comprises a surface-modifying agent, and wherein the surface-modifying agent is selected from cetyl trimethylammonium bromide (CTAB), poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), and mixtures thereof; iii) the particles of the first metal are nanoparticles, wherein said nanoparticles have a particle size of less than 100 nm; iv) the first metal is platinum and the second metal is gold, the first metal is gold and the second metal is silver, or the first metal is gold and the second metal is copper; v) the coated microcapsule has a particle size of from 0.1 micron to 500 microns; vi) the liquid core material comprises a perfume oil; and vii) the adjunct ingredient comprises from 0.01% to 98%, by weight of the composition of ethanol.

19 . A consumer product comprising a composition, said composition comprising:
from 50% to 99.9%, by weight of the composition of ethanol; and a plurality of coated microcapsules, said coated microcapsule comprising
i) a microcapsule comprising a polymeric shell and a liquid core material encapsulated therein; and
ii) a metallic coating surrounding said microcapsule;
wherein the metallic coating comprises particles of a first metal adsorbed on said polymeric shell and a film of a second metal formed thereon; and wherein the metallic coating has a maximum thickness of 1000 nm; wherein the coated microcapsules retain more than 50% by weight of the liquid core material when tested under the Ethanol Stability Test described herein.

20 . A method of making a composition, said method comprising the steps:
combining an adjunct material with a plurality of coated microcapsules to form a composition; wherein said coated microcapsules comprise
i) a microcapsule comprising a polymeric shell and a liquid core material encapsulated therein; and
ii) a metallic coating surrounding said microcapsule;
wherein the metallic coating comprises particles of a first metal adsorbed on said polymeric shell and a film of a second metal formed thereon; and wherein the metallic coating has a maximum thickness of 1000 nm; wherein said composition is a component of a consumer product.

Assignees

• Procter & Gamble

Inventors

• Baxter Elaine Alice Marie
• Biggs Simon Richard
• Cayre Olivier Jean
• Dyter Zoë
• Hitchcock James Paul
• Holland Lynette Anne Makins
• Khanolkar Madhuri Jayant
• Rodrigo Gomez Raul
• Tasker Alison Louise
• York David William

Classifications

• A61Q13/00

  Formulations or additives for perfume preparations (essential oils or perfumes per se C11B9/00) · CPC title

• C11B9/00

  Essential oils; Perfumes · CPC title

• C11B9/0019

  carbocylic acids; Salts or esters thereof · CPC title

• A61K8/11 Primary

  Encapsulated compositions · CPC title

• A61Q5/10

  Preparations for permanently dyeing the hair · CPC title