Microcapsules formed from phosphate esters and compositions containing same

Patent metadata

Field	Value
Publication number	US-9732303-B2
Application number	US-201614989547-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 6, 2016
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

Microcapsules can be formed of a phosphate ester and a multivalent ion. The microcapsules can encapsulate a core material having a C log P value of about 0 or greater. The phosphate ester can be lipophilic and insoluble in aqueous solutions.

First claim

What is claimed is:

1. A microcapsule comprising:
a core material miscible with a lipophilic phosphate ester; and
a shell wall at least partially surrounding the core material, the shell wall comprising the reaction product of the lipophilic phosphate ester and a multivalent ion.

2. The microcapsule of claim 1 , wherein the core material has a C log P value of about 0 or greater.

3. The microcapsule of claim 1 , wherein the core material comprises perfume oil.

4. The microcapsule of claim 1 , wherein the core material is polar.

5. The microcapsule of claim 1 is encapsulated in a starch matrix.

6. The microcapsule of claim 5 , wherein the starch matrix comprises an octenylsuccinic acid anhydride modified starch.

7. The microcapsule of claim 1 , wherein the lipophilic phosphate ester comprises a phosphate alcohol ester.

8. The microcapsule of claim 7 , wherein the phosphate alcohol ester has a carbon chain length between about 6 carbon atoms and about 18 carbon atoms.

9. The microcapsule of claim 1 , wherein the lipophilic phosphate ester comprises a phosphate diester.

10. The microcapsule of claim 1 , wherein the lipophilic phosphate ester has an acid value of about 180 mg KOH/g phosphate ester to about 450 mg KOH/g phosphate ester.

11. The microcapsule of claim 1 , wherein the multivalent ion comprises one or more of aluminum sulfate, chitosan, polyethyleneimine, and polydiallyldimethylammonium chloride.

12. A composition comprising:
an adjunct ingredient; and
one or more microcapsules, wherein each of the one or more microcapsules comprises:
a core material miscible with a lipophilic phosphate ester; and
a shell wall comprising the reaction product of the lipophilic phosphate ester and a multivalent ion.

13. The composition of claim 12 , wherein the core material has a C log P value of about 0 to about 5.

14. The composition of claim 13 , wherein the core material comprises a perfume.

15. The composition of claim 14 , wherein the lipophilic phosphate ester comprises a phosphate diester.

16. The composition of claim 15 , wherein the lipophilic phosphate ester has an acid value of about 180 mg KOH/g phosphate ester to about 450 mg KOH/g phosphate ester.

17. The composition of claim 16 , wherein the multivalent ion comprises one or more of aluminum sulfate, chitosan, polyethyleneimine, and polydiallyldimethylammonium chloride.

18. The composition of claim 17 , wherein the adjunct ingredient comprises an antiperspirant active.

19. The composition of claim 17 , wherein at least some of the microcapsules are encapsulated in a starch matrix.

20. The composition of claim 18 , wherein the starch matrix comprises an octenylsuccinic acid anhydride modified starch.

Assignees

• Procter & Gamble

Inventors

• Dihora Jiten Odhavji
• Nijakowski Timothy Roy
• Cetti Jonathan Robert

Classifications

• A61Q5/02

  Preparations for cleaning the hair · CPC title

• C11B9/00 Primary

  Essential oils; Perfumes · CPC title

• A61K8/0233

  Distinct layers, e.g. core/shell sticks · CPC title

• A61K9/1652

  Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin (homeopathic globules A61K9/1623) · CPC title

• A61K8/817

  Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6) · CPC title