Patent ID: 8071683

Claim:
A surface modifier of formula (I): G-[B-A] n -B-Gâ€ƒâ€ƒ(I) wherein (i) A is a soft segment comprising hydrogenated polybutadiene, poly(2,2 dimethyl-1-3-propylcarbonate), or poly(diethylene glycol)adipate; (ii) B is a hard segment comprising a urethane formed from a diisocyanate selected from: 4,4â€²-methylene bis(cyclohexyl isocyanate); 3-isocyanatomethyl, 3,5,5-trimethyl cyclohexylisocyanate; m-tetramethylxylene diisocyanate; and hexamethylene diisocyanate; and (iii) G is a surface active group, wherein n is an integer from 1 to 10, and wherein said surface modifier has a thermal degradation temperature of at least 240Â° C. and wherein said surface modifier has a theoretical molecular weight of less than 10,000 Daltons.