Patent ID: 7563388

Claim:
A composition, comprising: a crosslinked polymer obtained on crosslinking an uncrosslinked polymer comprising repeating units having the structure wherein each occurrence of R 1 is independently selected from C 4 -C 10 tertiary alkyl, C 6 -C 12 primary or secondary alkyl, C 4 -C 10 tertiary alkoxy, C 6 -C 12 primary or secondary alkloxy, unsubstituted or substituted phenoxy, unsubstituted or substituted thiophenoxy, unsubstituted or substituted benzyl, unsubstituted or substituted benzoyl, unsubstituted or substituted phenyl sulfonyl, unsubstituted or substituted phenyl sulfinyl; p is 1, 2, 3, or 4; each occurrence of R 2 is independently C 1 -C 12 hydrocarbyl; each occurrence of q is independently 0, 1, 2, 3, or 4; each occurrence of m is independently 1, 2, 3, 4, or 5; and each occurrence of X 1 is —O— or —NH—.