| 主权项 |
1. 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 1R is H or —CH3, -L- is —O— or2R is trimethylsilyl group (—Si(CH3)3) or a C4-C25 alkyl which is substituted by at least one trimethylsilyloxy, trimethylsilylamino group or trimethylsilyl-C1-C7 alkylamino group, 3R is H or C1-C8 alkyl group, in which 1R is H or —CH3, -L- is —O— or3R is H or C1-C8 alkyl group, 4R is C1-C12 unsubstituted alkylene (divalent radical) or substituted alkylene in which one or more hydrogens are substituted by C1-C3 alkoxy groups, hydroxy groups, amino groups, thiol groups, and/or carboxyl groups, 5R is C1-C7 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. |
