Benefit agent delivery particles comprising dextran

• US 9,351,910 B2
• Filed: 07/30/2012
• Issued: 05/31/2016
• Est. Priority Date: 08/24/2011
• Status: Active Grant

• Current Assignee: Conopco, Inc. (Unilever PLC)
• Original Assignee: Conopco, Inc. (Unilever PLC)
• Inventors: Chen, Honggang, Jones, Christopher Clarkson, Pan, Xiaoyun, Wang, Jinfang
• Primary Examiner(s): Mruk, Brian P
• Application Number:
  US14/239,558
• Publication Number:
  US 20140213499A1
• Time in Patent Office: 1,401 Days
• US Class Current: 1/1
• CPC Class Codes: A61K 2800/654 The particulate/core comprising macromolecular material
• CPC Class Codes: A61K 8/0241 Containing particulates characterized by their shape and/or structure see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61K 8/66 Enzymes
• CPC Class Codes: A61K 8/73 Polysaccharides
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair
• CPC Class Codes: A61Q 5/12 Preparations containing hair conditioners
• CPC Class Codes: C11D 17/0039 Coated compositions or coated components in the compositions, (micro)capsules
• CPC Class Codes: C11D 3/222 Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Abstract

The invention provides a composition comprising a benefit agent delivery particle comprising dextran as a delivery aid. The benefit agent delivery particle may further comprise a non-polysaccharide polymer, preferably an aminoplast polymer. The benefit agent delivery particle may comprise a perfume. The invention also provides a process for the manufacture of the particles in which perfume oil is encapsulated using emulsion polymerization to form core-shell particles, (in the alternative the perfume may be adsorbed later) and, a further polymer layer is formed on the outer surface of the core shell-particles in the presence of the delivery aid.

Claims

1. A benefit agent delivery particle comprising:

at least one delivery aid and

an aminoplast polymer;

wherein the at least one delivery aid comprises dextran;

wherein the dextran is located at the outer surface of the particle; and

wherein the dextran is an α

-D-1,6-glucose-linked glucan with 1-3-branch linkages.

2. A particle according to claim 1 wherein the dextran has a molecular weight above 5 kD.

3. A particle according to claim 1 which comprises a perfume.

4. A particle according to claim 1 which comprises a core and a shell.

5. A composition comprising:

a) a particle according to claim 1, and,

b) an enzyme selected from the group consisting of hemicellulase, cellulase, polygalacturonase, xylanase, pectinase, mannanase, pectate lyase, ligninase, pullulanase, pentosanase, arabinosidase, hyaluronidase, chondroitinase, laccase, glycosylhydrolase, amylases, and mixtures thereof.

6. A laundry treatment composition comprising:

a) a particle according to claim 1,

b) at least one anionic or non-ionic surfactant, and,

c) an enzyme selected from the group consisting of cellulase, mannanase and mixtures thereof.

7. A laundry treatment composition according to claim 6 wherein the composition is a liquid or gel.

8. A hair treatment composition comprising:

a) a particle according to claim 1,

b) at least one anionic or non-ionic surfactant.

9. A process comprising:

a) encapsulating a perfume oil using emulsion polymerization to form core-shell particles, and,

b) forming a further polymer layer on the outer surface of the core shell-particles in the presence of dextran to form the benefit agent delivery particles according to claim 1.

10. A particle according to claim 2, wherein the dextran has a molecular weight above 20 kD.