Patent ID: 6262208
Filing Date: 2001-07-17
Classification: C08F,G02B

Abstract:
A copolymer prepared by polymerizing a monomer mixture comprising:(A) an N-vinyllactam;(B) a fluoroalkyl (meth)acrylate;(C) a (meth)acrylamide represented by formula (II):CH.sub.2.dbd.C(R.sup.2)--CO--N(R.sup.3)(R.sup.4) (II)whereinR.sup.2 represents a hydrogen atom or methyl group; andR.sup.3 and R.sup.4 each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an alkyl group with a hydroxyl group having 1 to 4 carbon atoms, or R.sup.3 and R.sup.4 together represent an alkylene group represented by the formula --(CH.sub.2).sub.p --, wherein p is an integer of 4 to 6, or a divalent group represented by the formula --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --;(D) a crosslinking agent having at least 2 (meth)acryloyloxy groups; and(E) a dicarboxylic acid divinyl ester.