High-efficiency perfume capsules

• US 8,759,275 B2
• Filed: 11/04/2010
• Issued: 06/24/2014
• Est. Priority Date: 11/06/2009
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Smets, Johan, Vansteenwinckel, Pascale Claire Annick, Gizaw, Yonas, Hulskotter, Frank, Boeckh, Dieter, Haehnle, Hans-Joachim
• Primary Examiner(s): Douyon, Lorna M
• Application Number:
  US12/939,757
• Publication Number:
  US 20110111999A1
• Time in Patent Office: 1,328 Days
• Field of Search: 510/441, 510/445, 510/101, 510/349, 510/475, 510/513, 510/516, 510/108, 510/119, 510/221, 510/337, 510/418, 510/444, 510/515, 424/408, 424/417, 512/4, 134/42, 813/7
• US Class Current: 510/441
• CPC Class Codes: A01N 25/28 Microcapsules or nanocapsules
• CPC Class Codes: A23L 27/72 Encapsulation
• CPC Class Codes: A23P 10/30 Encapsulation of particles, e.g. foodstuff additives
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61K 8/585 Organosilicon compounds
• CPC Class Codes: A61K 8/731 Cellulose; Quaternized cellulose derivatives
• CPC Class Codes: A61K 8/8147 Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
• CPC Class Codes: A61K 8/8152 Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• CPC Class Codes: A61P 31/04 Antibacterial agents
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair
• CPC Class Codes: B01J 13/06 by phase separation
• CPC Class Codes: B01J 13/22 Coating
• CPC Class Codes: C09B 67/0097 Dye preparations of special physical nature; Tablets, films, extrusion, microcapsules, sheets, pads, bags with dyes
• CPC Class Codes: C11B 9/00 Essential oils; Perfumes
• CPC Class Codes: C11B 9/0023 containing nitrogen as the only heteroatom
• CPC Class Codes: C11D 1/12 Sulfonic acids or sulfuric acid esters; Salts thereof
• CPC Class Codes: C11D 1/29 Sulfates of polyoxyalkylene ethers
• CPC Class Codes: C11D 17/0039 Coated compositions or coated components in the compositions, (micro)capsules
• CPC Class Codes: C11D 17/06 : Powder; Flakes; Free-flowing mixtures; Sheets
• CPC Class Codes: C11D 2111/12 : Soft surfaces, e.g. textile
• CPC Class Codes: C11D 3/001 : Softening compositions
• CPC Class Codes: C11D 3/2044 : linear
• CPC Class Codes: C11D 3/225 : etherified, e.g. CMC
• CPC Class Codes: C11D 3/3703 : Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C11D 3/3723 : Polyamines or polyalkyleneimines
• CPC Class Codes: C11D 3/373 : containing silicones
• CPC Class Codes: C11D 3/505 : encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Abstract

The present application relates to high efficiency particles and compositions, such as consumer products, comprising such high efficiency particles as well as processes for making and using such high efficiency particles and compositions comprising such high efficiency particles. Such high efficiency particles and compositions provide enhanced benefit agent delivery to a situs that is treated with such high efficiency particles and compositions.

Claims

1. An encapsulate comprising a core which comprises perfume, a wall having an outer surface and a coating, said wall comprising melamine formaldehyde and encapsulating said core, said coating surrounding the outer surface of said wall, said coating comprising an efficiency polymer which is a polyvinyl formamide, said efficiency polymer having an average molecular mass from about 10,000 Da to about 50,000,000 Da;

a hydrolysis degree, of from about 5% to about 40%; and

/or a charge density from about 1 meq/g efficiency polymer to about 23 meq/g efficiency polymer.

2. An encapsulate according to claim 1, having a coating to wall ratio of from about 1:

200 to about 1;

2.

3. An encapsulate according to claim 1, wherein;

a) said core further comprises a material selected from the group consisting of brighteners;

dyes;

insect repellants;

silicones;

waxes;

flavors;

vitamins;

fabric softening agents;

skin care agents enzymes;

anti-bacterial agents;

bleaches;

sensates; and

mixtures thereof;

b) said wall further comprises a material selected from the group consisting of polyethylenes;

polyamides;

polystyrenes;

polyisoprenes;

polycarbonates;

polyesters;

polyacrylates;

aminoplasts in addition to melamine formaldehyde, gelatin;

shellac;

epoxy resins;

vinyl polymers;

water insoluble inorganics;

silicone; and

mixtures thereof.

4. An encapsulate according to claim 1, wherein said wall comprises melamine formaldehyde and cross linked melamine formaldehyde.

5. An encapsulate according to claim 1, wherein said wall comprises melamine formaldehyde, cross linked melamine formaldehyde, poly(acrylic acid) and poly(acrylic acid-co-butyl acrylate).

6. An encapsulate according to claim 1, wherein said efficiency polymer has an average molecular mass from about 10,000 Da to about 10,000,000 Da.

7. A slurry comprising an encapsulate according to claim 1, said slurry having a zeta potential of from about −

10 meV to about +50 meV.

8. A slurry comprising, based on total slurry weight, a sufficient amount of the encapsulate of claim 1 to provide said slurry with from about 0.05% to about 10% of the efficiency polymer.

9. An agglomerate comprising an encapsulate according to claim 1.

10. A process of making the agglomerate of claim 9, said process comprising:

a) combining an encapsulate according to claim 1;

a plasticizer, and, optionally, a binder and/or chelant to form a mixture;

b) combining said mixture with a dusting agent; and

c) removing a sufficient amount of said plasticizer from said material to yield a product comprising, based on total product weight from 1% to 50% plasticizer.

11. A consumer product comprising:

a) an capsulate according to claim 1; and

b) an adjunct ingredient.

12. The consumer product of claim 11, said consumer product comprising a sufficient amount of encapsulate to provide said consumer product with said efficiency polymer level, based on total consumer product weight, of from about 0.0001% to about 0.1%.

13. A consumer product according to claim 11, said consumer product comprising a material selected from the group consisting of an anionic surfactant, cationic surfactant, silicone and mixtures thereof.

14. A consumer product according to claim 11 wherein said adjunct ingredient is selected from the group consisting of a cationic polymer, surfactants, builders, chelating agents, optical brighteners, dye transfer inhibiting agents, dispersants, enzymes, enzyme stabilizers, catalytic materials, bleach activators, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, dye polymer conjugates;

dye clay conjugates, suds suppressors, dyes, bleach catalysts, additional perfume and/or perfume delivery systems, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids, rheology modifiers, structurants, thickeners, pigments, water and mixtures thereof.

15. A consumer product according to claim 14, said consumer product comprising a rheology modifier, thickener and/or structurant having a high shear viscosity, at 20 sec⁻

1 shear rate and at 21°

C., of from 1 to 7000 cps and a viscosity at low shear, sec<sup>−

1</sup> shear rate at 21°

C., of greater than 1000 cps.

16. A consumer product according to claim 11, said consumer product being a fluid detergent and comprising, based on total fluid detergent weight, less than about 80% water.

17. A method of cleaning or treating a situs comprising optionally washing and/or rinsing said situs, contacting said situs with a consumer product according to claim 11, and optionally washing and/or rinsing said situs.