Modified polysaccharides

Patent metadata

Field	Value
Publication number	US-9820928-B1
Application number	US-201615140107-A
Country	US
Kind code	B1
Filing date	Apr 27, 2016
Priority date	Apr 27, 2016
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Cationic and silicon substituents are introduced into polysaccharides thereby producing modified polysaccharides cationically substituted by quaternary ammonium groups and having a charge density of about 0.1 to about 2.5 meq/g, and further substituted by siliconate groups such that the modified polysaccharide has a silicon content of about 300 to about 5000 ppm. The modified polysaccharides have application in industrial, home care and personal care surface modifying formulations.

First claim

We claim:

1. A modified polysaccharide having both cationic and silicon substituents, the modified polysaccharide being cationically substituted by quaternary ammonium groups and having a charge density of about 0.1 to about 2.5 meq/g, the modified polysaccharide further being substituted by siliconate groups so that the modified polysaccharide has a silicon content of about 300 to about 5000 ppm.

2. The modified polysaccharide according to claim 1 , wherein the quaternary ammonium groups are derived from a quaternary ammonium compound of one of the general formulae (I) or (II):

wherein
n is an integer from 1 to 16;
X is halogen;
Z − is an anion which may be inorganic, nitrate, nitrite; phosphate, sulfate or hydroxide; or organic;
R is hydrogen or methyl; and
R 1 , R 2 and R 3 are independently an organic radical having up to 10 carbon atoms.

3. The modified polysaccharide according to claim 1 ,
wherein the polysaccharide is crosslinked to reduce its solubility in water.

4. The modified polysaccharide according to claim 1 , wherein the ratio of cationic substituents to silicon substituents on the polysaccharide is from about 1500:1 to about 1:3.

5. The modified polysaccharide according to claim 1 , wherein the polysaccharide is a starch.

6. The modified polysaccharide according to claim 5 , wherein the starch is chosen from banana, corn, pea, potato, sweet potato, barley, wheat, rice, sago, amaranth, tapioca, sorghum, waxy maize, waxy rice, waxy potato, waxy sorghum, waxy cassava, waxy barley, high amylose starch and combinations thereof.

7. The modified polysaccharide according to claim 1 , wherein the polysaccharide is a polygalactomannan.

8. The modified polysaccharide according to claim 7 , wherein the polygalactomannan is chosen from fenugreek gum, guar gum, tara gum, locust bean gum and cassia gum.

9. The modified polysaccharide according to claim 8 , wherein the polygalactomannan is guar gum.

10. The modified polysaccharide according to claim 1 , wherein the polysaccharide is substituted by quaternary ammonium groups having a charge density of about 0.2 to about 2.0 meq/g.

Assignees

• Corn Products Dev Inc

Inventors

• Bellovin Christopher
• Sheihet Larisa
• Nikolic Nikola

Classifications

• A61K2800/34

  Free of silicones · CPC title

• C09D105/00

  Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00 · CPC title

• A61K8/737 Primary

  Galactomannans, e.g. guar; Derivatives thereof · CPC title

• A61Q5/06

  Preparations for styling the hair, e.g. by temporary shaping or colouring · CPC title

• A61K8/732

  Starch; Amylose; Amylopectin; Derivatives thereof · CPC title