Polymers and their use

• US 20030162688A1
• Filed: 08/22/2002
• Published: 08/28/2003
• Est. Priority Date: 08/31/2001
• Status: Active Grant

• Current Assignee: Henkel IP & Holding GmbH (Henkel AG & Co KGaA)
• Original Assignee: Unilever Home & Personal Care Usa Division Of Conopco, Inc.
• Inventors: Jones, Christopher Clarkson, Kukulj, Dax, Findlay, Paul Hugh
• Granted Patent: US 6,903,208 B2
• Time in Patent Office: Days
• US Class Current: 510/515
• CPC Class Codes: A61K 8/893 modified by an alkoxy or aryloxy group, e.g. behenoxy dimethicone or stearoxy dimethicone
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: C08B 15/05 Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur esters or phosphorous acids C08B5/00
• CPC Class Codes: C08B 3/16 Preparation of mixed organic cellulose esters , e.g. cellulose aceto-formate or cellulose aceto-propionate
• CPC Class Codes: C08B 3/22 Post-esterification treatments, including purification
• CPC Class Codes: C08L 1/00 Compositions of cellulose, modified cellulose or cellulose derivatives
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 3/00 Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
• CPC Class Codes: C08L 5/00 Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
• CPC Class Codes: C11D 3/222 Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• CPC Class Codes: C11D 3/3788 Graft polymers

Abstract

A substituted polysaccharide comprising β_1-4 linkages having covalently bonded on the polysaccharide moiety thereof, at least one deposition enhancing group which undergoes a chemical change in water at a use temperature to increase the affinity of the substituted polysaccharide to a substrate, the substituted polysaccharide further comprising one or more independently selected silicone chains.

Claims

1. A substituted polysaccharide comprising β

_1-4 linkages having covalently bonded on the polysaccharide moiety thereof, at least one deposition enhancing group which undergoes a chemical change in water at a use temperature to increase the affinity of the substituted polysaccharide to a substrate, the substituted polysaccharide further comprising one or more independently selected silicone chains.

2. A substituted polysaccharide according to claim 1, wherein the average degree of substitution of the silicone chain(s) is from 0.001 to 0.5, preferably from 0.01 to 0.5, more preferably from 0.01 to 0.1, even more preferably from 0.01 to 0.05.

3. A composition as claimed in claim 1 or 2 wherein the substituted polysaccharide comprises only β

1-4 linkages.

4. A composition as claimed in claim 1 or 2 claims wherein the substituted polysaccharide comprises additional linkages.

5. A composition as claimed in claim 4 wherein the substituted polysaccharide comprises β

1-4 and β

1-3 linkages.

6. A composition as claimed in claim 5 wherein the weight ratio of β

1-3 and β

1-4 linkages is from 1;

100 to 1;

2.

7. A substituted polysaccharide according to any of the preceding claims, wherein the silicone chain(s) is or are independently selected from those of formula:

8. A substituted polysaccharide according to claim 7, where L is selected from amide linkages, ester linkages, ether linkages, urethane linkages, triazine linkages, carbonate linkages, amine linkages and ester-alkylene linkages.

9. A substituted polysaccharide according to any preceding claim, wherein the chemical change is hydrolysis, perhydrolysis or bond-cleavage, optionally catalysed by an enzyme or another catalyst.

10. A substituted polysaccharide according to any preceding claim, wherein the group(s) which undergo the chemical change comprise one or more groups attached via an ester linkage to the polysaccharide.

11. A substituted polysaccharide according to any preceding claim, having the general formula (1):

—

12. A substituted polysaccharide according to claim 10 or 11 when dependent on claim 8, wherein the ester-linked group(s) is/are selected from carboxylic acid esters.

13. A substituted polyssaccharide according to any of claims 10 to 12, wherein the ester-linked group(s) is/are independently selected from one or more of acetate, propanoate, trifluroacetate, 2-(2-hydroxy-1-oxopropoxy) propanoate, lactate, glycolate, pyruvate, crotonate, isovalerate, cinnamate, formate, salicylate, carbamate, methylcarbamate, benzoate, gluconate, methanesulphonate, toluene sulphonate, groups and hemiester groups of fumaric, malonic, itaconic, oxalic, maleic, succinic, tartaric, aspartic, glutamic, and malic acids.

14. A substituted polysaccharide according to any preceding claim, wherein the average degree of substitution on the saccharide rings of the groups which undergo the chemical change is from 0.1 to 3, preferably from 0.1 to 1.

15. A substituted polysaccharide according to any preceding claim, further comprising one or more other pendant groups which are neither silicone chains nor groups which undergo a chemical change to enhance substrate affinity.

16. A substituted polysaccharide according to claim 15, wherein the average degree of substitution of other pendant groups is from 0.01 to 0.5, preferably from 0.01 to 0.05.

17. A method of depositing a silicone onto a substrate, the method comprising contacting in an aqueous solution, the substrate and a substituted polysaccharide as according to any preceding claim.

18. A composition comprising a substituted polysaccharide as according to any one of claims 1 to 16 and at least one further component.

19. A composition according to claim 18, in which the further component comprises a surfactant.

20. A composition according to claims 18 or claim 19, comprising from 0.01% to 25%, preferably from 0.1% to 10%, more preferably from 0.5% to 3% by weight of the substituted polysaccharide according to any of claims 1-16.

21. Use of a composition according to any of claims 18 to 20 to enhance the softening benefit of the composition on a substrate.