Patent ID: 7138108

Claim:
A siloxane/silane compound having one of the following structural formulae (1), (2) or (3): A-SiR′ 1 R′ 2 R′ 3 (3) in which A is a radical of the following formula (I): or its trans isomer form; R 1 is a hydrogen atom, a saturated or unsaturated, linear or branched C 1 –C 8 alkyl radical, or a phenyl radical which is optionally substituted with one or more saturated or unsaturated, linear or branched C 1 –C 8 alkyl or alkoxy radicals; R 2 is a hydrogen atom, a saturated or unsaturated, linear or branched C 1 –C 8 alkyl radical, or a saturated or unsaturated, linear or branched C 1 –C 8 alkoxy radical; R 3 is a saturated or unsaturated, linear or branched C 1 –C 8 alkyl radical, or a saturated or unsaturated, linear or branched C 1 –C 8 alkoxy radical; L is a divalent radical bonding the radical A directly onto the siloxane or silane backbone, said divalent radical being methylene, ethylene or a group having one of the following formulae (a), (a′) or (a″): in which Z is a saturated or unsaturated, linear or branched C 1 –C 6 alkylene radical optionally substituted with a hydroxyl radical, or a saturated or unsaturated, linear or branched C 1 –C 8 alkyl radical; Y is a hydrogen atom, a hydroxyl radical, or a saturated or unsaturated, linear or branched C 1 –C 8 alkyl radical; p is 0 or 1; the radicals R, which are identical or different, are each a saturated or unsaturated, linear or branched C 1 –C 20 alkyl radical, a phenyl radical, a 3,3,3-trifluoropropyl radical, or a trimethylsilyloxy radical, at least 80% by number of the radicals R being methyl; the radicals B, which are identical or different, are each a radical R or a radical A; r is a number varying from 0 to 50; s is a number varying from 0 to 20 and, if s is 0, at least one of the two radicals B is a radical A; u is a number varying from 1 to 6 inclusive; t is a number varying from 0 to 10; t+u is greater than or equal to 3; and the radicals R′ 1 , R′ 2 , R′ 3 , which are identical or different, are each a saturated or unsaturated, linear or branched C 1 –C 8 alkyl radical; phenyl radical, or a benzyl radical; or mixture thereof.