Patent ID: 7101654

Claim:
A polymer comprising a repeating unit represented by the formula: wherein in Formula (I-a): X is O, S, —CH 2 — or —CH 2 CH 2 —; n is an integer from 0 to 5 inclusive; each R1 to R4 independently represents hydrogen, a linear or branched (C 1 to C 20 ) alkyl, or a linear or branched (C 1 to C 20 ) haloalkyl, subject to the proviso that at least one of R1 to R4 is a group represented by the formula: wherein: G is —SO 2 — or —C(O)—; T is —Si(R 20 ) 3 ; t is 0 or 1; j is 1 or 2; q is 0 or 1; and A is a spacer moiety represented by —(CH 2 ) m —, —(CH 2 ) m O—, —(CH 2 ) m O(CH 2 ) m —, O(CH 2 ) m —, —(CH 2 ) m NR 9 (CH 2 ) m —, —(C(R 10 ) 2 ) m (C(R 10 ) 2 ) m O(C(R 11 ) 2 ) a —, wherein: each R 9 independently is (C 1 to C 5 ) alkyl; each R 10 independently is hydrogen, halogen, (C 1 to C 5 ) alkyl, or (C 1 to C 5 ) haloalkyl; R 11 independently is hydrogen or halogen; each R 12 independently is hydrogen, (C 1 to C 10 ) alkyl or (C 1 to C 5 ) haloalkyl; each R 20 independently is a (C 1 to C 4 ) alkyl; each a independently is 2 to 6; and each m independently is 0 to 4.