Patent ID: 7723459

Claim:
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.