Patent ID: 6946536
Filing Date: 2005-09-20
Classification: C08G,C09D

Abstract:
1. A silicon-containing copolymer having a number average molecular weight of 500 to 1000,000 and comprising at least structural units represented by the general formulae (I) and (II) and at least one of the structural units represented by general formulae (III) and (IV): wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 independently represent an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkylamino group, an alkylsilyl group or an alkoxyl group; R 7 represents an alkylene group, an alkenylene group, a cycloalkylene group, an arylene group, an alkylimino group, or an alkylsilylene group, R 8 and R 9 independently represent an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkylamino group, an alkylsilyl group or an alkoxyl group; A is NH or O; and the structural units (I) to (IV) in the polymer are arranged at random, and their molar ratios p, q, r and s satisfy the following formula: and the ratio of the number of Si—O bonds to that of Si—N bonds in the polymer satisfies the following formula: