Patent ID: 6458878
Filing Date: 2002-10-01
Classification: C08F,C09D

Abstract:
A silyl (meth)acrylate copolymer (A-1) comprising:(a) silyl (meth)acrylate constituent units represented by the following formula (I) in amounts of 20 to 80% by weight: wherein R1 is a hydrogen atom or a methyl group, and R2, R3 and R4 may be the same or different and are each an alkyl group, a cycloalkyl group or a phenyl group,(b) acrylic unsaturated monomer constituent units represented by the following formula (II) in amounts of 0.01 to 40% by weight: wherein R5 is a hydrogen atom or a methyl group, Z is an oxygen atom or â€”NR7, when Z is an oxygen atom, R6 is a hydroxyalkyl or hydroxycycloalkyl group or a polyalkylene glycol group represented by the formula â€”(R8O)nH (wherein R8 is an alkylene group and n is an integer of 2 to 50), and when Z is â€”NR7, R7 is an unsubstituted alkyl group or an alkyl group substituted with any of a halogen atom, a hydroxyl group, an amino group, an acyl group and an alkoxy group, and R6 is a hydrogen atom, and(c) unsaturated monomer constituent units other than the constituent units (a) and (b) in amounts of 5 to 79.99% by weight, with the proviso that the total amount of the constituent units (a), (b) and (c) is 100% by weight, said silyl (meth)acrylate copolymer (A-1) having a weight-average molecular weight, as measured by gel permeation chromatography (GPC), of not more than 200,000.