Patent ID: 7074878

Claim:
A polymer having the formula of: Xâ€”Oâ€”{[(R 1 â€”O) a â€”CO 2 â€”] h â€”[(R 2 â€”O) b â€”CO 2 â€”] i } m â€”{[(R 3 â€”O) c â€”CO 2 â€”] j â€”[(R 4 â€”O) d â€”CO 2 â€”] k }â€”(R 5 â€”O) e â€”Y wherein R 1 , R 2 , R 3 , R 4 , and R 5 are methyl groups; a, b, c, d, and e are integers of from about 5 to 500; h, i, j, and k are integers of from 0 to about 100, and the sum of h, i, j, and k is from about 5 to 100; and X and Y are independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, and reactive moieties.