Polymeric polysorbate softeners
View Patent ↗The present invention is directed to a class of polyesters that are lightly crosslinked polyesters made by reacting polysorbate units (linked by the reaction of their hydroxyl groups) to the carboxyl group of dimer acid. As will become clear, lightly crosslinked as used herein relates to reactions in which there is an excess of hydroxyl groups on a molar basis to carboxylic groups on the dimer acid. The polymers and a contribute softness, lubricity and antistatic properties when applied to hair, skin, textile fiber and paper.
1. A polyester made by the reaction consisting of
(a) a polysorbate conforming to the following structure
e is an integer ranging from 0 to 30;
f is an integer ranging from 0 to 30;
g is an integer ranging from 0 to 30, with the proviso that e+f+g is an integer ranging from 9 to 50;
R 1 is alkyl having from 7 to 21 carbon atoms;
with (b1) dimer acid conforming to the following structure:
or (b2) hydrogenated dimer acid conforming to the following structure:
at a temperature of between 150 and 200° C., said the mole ratio of said carboxyl groups in the dimer acid to hydroxyl group in the polysorbate range from 1:2 to 1:3; this partial crosslinking provides increased molecular weight and improved skin lubricity.
2. A polymer of claim 1 wherein said dimer acid is a hydrogenated dimer acid conforming to the following structure:
3. A polymer of claim 1 wherein said dimer acid is a dimer acid conforming to the following structure:
4. A polymer of claim 1 wherein e+f+g is an integer ranging from 15 to 30.
5. A polymer of claim 2 wherein e+f+g is an integer ranging from 15 to 30.
6. A polymer of claim 3 wherein e+f+g is an integer ranging from 15 to 30.
7. A process for conditioning fiber which comprised contacting the fiber with an effective conditioning concentration of a polyester made by the reaction consisting of (a) a polysorbate conforming to the following structure
e is an integer ranging from 0 to 30;
f is an integer ranging from 0 to 30;
g is an integer ranging from 0 to 30, with the proviso that e+f+g is an integer ranging from 9 to 50;
R 1 is alkyl having from 7 to 21 carbon atoms;
with (b1) dimer acid conforming to the following structure:
or (b2) hydrogenated dimer acid conforming to the following structure:
at a temperature of between 150 and 200° C., said the mole ratio of said carboxyl groups in the dimer acid to hydroxyl group in the polysorbate range from 1:2 to 1:3; this partial crosslinking provides increased molecular weight and improved skin lubricity.
8. A process of claim 7 wherein said dimer acid is a hydrogenated dimer acid conforming to the following structure:
9. A process of claim 7 wherein said dimer acid is a dimer acid conforming to the following structure:
10. A process of claim 7 wherein said fiber is hair.
11. A process of claim 7 wherein said fiber is textile fiber.
12. A process of claim 7 wherein said fiber is paper.
13. A process of claim 8 wherein said fiber is hair.
14. A process of claim 8 wherein said fiber is textile fiber.
15. A process of claim 8 wherein said fiber is paper.
16. A process of claim 9 wherein said fiber is hair.
17. A process of claim 9 wherein said fiber is textile fiber.
18. A process of claim 9 wherein said fiber is paper.
19. A process of claim 7 wherein said effective concentration ranges from 0.1 to 15% by weight.
20. A process of claim 7 wherein e+f+g is an integer ranging from 15 to 30.