Silicone erucate esters
View Patent ↗The invention relates to a series of novel silicone fatty esters, specifically dimethicone copolyol erucate esters. This class of compounds provides has a unique combination of properties including clarity and liquidity and oxidative stability and water solubility of the silicone ester per se, and the ability to provide outstanding softening and wet comb lubrication, as well as actually strengthening the hair. These properties are highly desirable in cosmetic products. The compounds of the present invention are prepared by reacting the hydroxyl group in a silicone polymer with erucic acid, or an oil high in erucic acid like crambe oil. The compounds of the present invention have more than 40% by weight of erucic groups in the molecule. The concentration of this key component has been found to be critical to performance.
1. A silicone erucate ester, which conforms to the following structure:
wherein:
Me is methyl;
R is CH 3 —(CH 2 ) 7 CH—CH—(CH 2 ) 11 ;
a is an integer ranging from 1 to 20;
b is an integer ranging from 1 to 20);
x and z are independently integers ranging from 0 to 20;
y is an integer ranging from 5 to 20, with the proviso that x+z are greater than twice the value of y.
2. A silicone erucate ester of claim 1 wherein the erucate is derived from crucic acid.
3. A silicone crucate ester of claim 1 wherein the crucate is derived from crambe oil.
4. A process for conditioning hair, which comprises contacting the hair with an effective conditioning concentration of a silicone erucate ester, which conforms to the following structure:
wherein;
Me is methyl;
R is CH 3 —(CH 2 ) 7 CH═CH—(CH 2 ) 11 —;
a is an integer ranging from 1 to 20;
b is an integer ranging from 1 to 20;
x and z are independently integers ranging from 0 to 20;
y is an integer ranging from 5 to 20, with the proviso that x+z are greater than twice the value of y.
5. A process of claim 4 wherein said effective conditioning concentration ranges from 0.1% by weight to 25% by weight.
6. A process of claim 5 wherein the crucate is derived from crucic acid.
7. A process of claim 5 wherein the erucate is derived from crambe oil.