Patent ID: 8883928

Claim:
An actinically crosslinkable prepolymer, being obtained by: (a) copolymerizing an actinically polymerizable composition to obtain an intermediary copolymer with first functional groups, wherein the actinically polymerizable composition comprises (1) at least one vinylic monomer including a hydrolyzable silicone-containing group and being represented by formula (1) or (2), in which 1 R is H or —CH 3 , -L- is —O— or 2 R is trimethylsilyl group (—Si(CH 3 ) 3 ) or a C 4 -C 25 alkyl which is substituted by at least one trimethylsilyloxy, trimethylsilylamino group or trimethylsilyl-C 1 -C 7 alkylamino group, 3 R is H or C 1 -C 8 alkyl group, in which 1 R is H or —CH 3 , -L- is —O— or 3 R is H or C 1 -C 8 alkyl group, 4 R is C 1 -C 12 unsubstituted alkylene (divalent radical) or substituted alkylene in which one or more hydrogens are substituted by C 1 -C 3 alkoxy groups, hydroxy groups, amino groups, thiol groups, and/or carboxyl groups, 5 R is C 1 -C 7 alkylene group, (2) at least one hydrophilic vinylic monomer, (3) at least one siloxane-containing monomer having one ethylenically unsaturated group, at least one siloxane-containing macromer having one ethylenically unsaturated group, at least one siloxane-containing monomer having two or more ethylenically unsaturated groups, at least one siloxane-containing macromer having two or more ethylenically unsaturated groups, or a combination of two or more thereof, and (4) optionally a chain transfer agent, provided that at least one of components (2)-(4) further comprises at least one first functional group; and (b) reacting an organic compound with the copolymerization product to form the crosslinkable prepolymer having actinically crosslinkable groups, wherein the organic compound comprises an actinically crosslinkable group and a second functional group, wherein the second functional group of the organic compound reacts with one of the first functional groups of the intermediary copolymer.