Silicone polyester resins
View Patent ↗The present invention relates to a series of novel silicone polyesters which are prepared by crosslinking a dimethicone copolyol having at least 4 hydroxyl groups with a dimer acid. The ratio of acid groups to hydroxyl groups ranges from 0.7 to 1.4 so that a significant number of groups are reacted and a significant number of crosslink groups are achieved.
1. A polyester made by esterification reaction consisting of reacting:
(a) a dimer acid source selected from
dimer acid conforming to the following structure:
or hydrogenated dimer acid conforming to the following structure:
or mixtures thereof;
with
(b) a dimethicone copolyol conforming to the following structure:
wherein:
a is an integer ranking from 0 to 100;
b is an integer ranging from 4 to 20, with the proviso that b is greater than or equal to a times 0.75);
x is an integer ranging from 6 to 20;
with the proviso that the ratio of hydroxyl group to hydroxyl group be between 0.7 and 1.4.
2. A polyester of claim 1 wherein said esterification reaction is conducted at a temperature of between 120 and 200° C. for five to 10 hours.
3. A polyester of claim 1 wherein said dimer acid source is dimer acid.
4. A polyester of claim 1 wherein said dimer acid source is hydrogenated dimer acid.
5. A polyester of claim 1 wherein x is 10-15.
6. A polyester of claim 1 wherein x is 8-12.
7. A polyester of claim 1 wherein a is 0 to 20.
8. A polyester of claim 1 wherein a is 0.
9. A polyester of claim 1 wherein the ratio of hydroxyl to acid is 1:1.
10. A polyester of claim 1 wherein the ratio of hydroxyl to acid is 1:1.4.
11. A process for conditioning hair skin and fiber which comprises contacting the hair skin of fiber with an effective conditioning concentration of a polyester consisting of the reaction of:
(a) a dimer acid source selected from
dimer acid conforming to the following structure:
or hydrogenated dimer acid conforming to the following structure:
or mixtures thereof;
with
(b) a dimethicone copolyol conforming to the following structure:
wherein:
a is an integer ranking from 0 to 100;
b is an integer ranging from 4 to 20, with the proviso that b is greater than or equal to a times 0.75);
x is an integer ranging from 6 to 20;
with the proviso that the ratio of hydroxyl group to acid group be between 0.7 and 1.4.
12. A process of claim 11 wherein said effective conditioning concentration ranges between 0.1 and 10% by weight.
13. A process of claim 11 wherein said dimer acid source is dimer acid.
14. A process of claim 11 wherein said dimer acid source is hydrogenated dimer acid.
15. A process of claim 11 wherein x is 10-15.
16. A process of claim 11 wherein x is 8-12.
17. A process of claim 11 wherein a is 0 to 20.
18. A process of claim 11 wherein a is 0.
19. A process of claim 11 wherein the ratio of hydroxyl to acid is 1:1.
20. A process of claim 11 wherein the ratio of hydroxyl to acid is 1:1.4.