Patent ID: 7601860

Claim:
A silicon compound of the formula wherein R 1 , R 2 and R 3 may be the same as or different from the other and each is independently selected from the group consisting of H, C 1 -C 5 alkyl, C 3 -C 6 cycloalkyl, aryl and arylalkyl; and X 1 , X 2 , Y 1 , and Y 2 may be the same as or different from the other and each is independently selected from the group consisting of H, alkyl, alkylamino, dialkylamino and alkylhydrazido; with the proviso that when each of R 3 is H, and each of R 1 , X 1 , X 2 , Y 1 , and Y 2 is methyl, then both R 2 are not H or methyl.