Patent ID: 7064174

Claim:
A silicon containing adduct having the formula (X) in which X 1 is an electron withdrawing group selected from the group consisting of carbonyl and sulphone groups, suiphonium and phosphonium salts; R 24 is a zwitterion or hydroxy substituted alkoxy, alkoxy alkoxy or oligoalkoxy alkoxy group; R 25 and R 26 are independently selected from hydrogen and C 1 –C 12 alkyl groups; R 27 is a group of formula VII in which R 14 , R 15 and each R 16 are independently selected from monovalent groups selected from hydrogen, branched and straight C 1-12 alkyl, C 6-18 aryl, C 6-18 alkaryl, C 6-18 aralkyl, C 2-12 alkenyl, C 2-12 alkynyl and (—OSiR 16 2 ) p OSiR 16 3 , and divalent groups selected from branched and straight C 1-12 -alkanediyl, C 6-18 -arylene, C 7-18 -alkarylene, C 12-2 -alkenediyl and C 12-2 -alkynediyl, any of which may be substituted by a primary, secondary or tertiary amine group and/or a group X 1 CH(R 25 )CH(R 26 )NR 27 CONHR 28 or a group —N(R 27 )CH(R 26 )CH(R 25 )X 1 R 24 n is 0–300 and, p is 0 to 50, provided that at least one of the groups R 14 , R 15 and R 16 is a divalent radical which is covalently bonded to the nitrogen; and R 28 is an optionally substituted alkyl, alkenyl, alkynyl, aryl, cycloalkyl, cycloalkenyl or cycloalkynyl group comprising an ethylenically unsaturated or isocyanate group.