Patent ID: 8252850

Claim:
A compound of formula wherein R 1 , R 2 , R 3 , R 4 , R 7 and R 8 are independently selected from hydrogen, C 1 -C 4 alkyl, C 1 -C 2 alkanol or hydroxyl; A is [SiR 5 R 6 O] W SiR 5 R 6 , wherein R 5 and R 6 are independently selected from C 1-4 alkyl or phenyl, and w is from 0 to 60; m and n are integers independently selected from 1 to 10; p is 1; and q is an integer from 0 to 6; and R 9 is hydrogen, C 1 -C 4 alkyl or C 1 -C 2 alkanol.