Patent ID: 6686430
Filing Date: 2004-02-03
Classification: C08F

Abstract:
An alicyclic hydrocarbon copolymer having a weight average molecular weight in the range of 1,000 to 1,000,000 and comprising repeating units (a) represented by the following general formula (1), and at least one kind of repeating units (b) selected from those which are represented by the following general formula (2) and/or the following general formula (3); the sum of repeating units (a) and repeating units (b) being at least 90% by weight based on the weight of the copolymer, and the content of repeating units (b) being at least 1% by weight but smaller than 10% by weight, based on the weight of the copolymer; and the chain of repeating units (a) satisfying the following formula:A&lE;0.3Ã—B where A=weight average molecular weight of the chain of repeating units (a), andB=weight average molecular weight (Mw) of the alicyclic hydrocarbon copolymerÃ—(number of repeating units (a)/number of the total repeating units constituting the alicyclic hydrocarbon copolymer), wherein X in formula (1) is an alicyclic hydrocarbon group, R1 through R13 in formulae (1), (2) and (3) independently represent a hydrogen atom, a chainlike hydrocarbon group, a halogen atom, an alkoxy group, a hydroxy group, an ether group, an ester group, a cyano group, an amide group, an imide group, a silyl group, and a chainlike hydrocarbon group having one or more polar groups as a substituent which are selected from a halogen atom, an alkoxy group, a hydroxy group, an ether group, an ester group, a cyano group, an amide group, an imide group and a silyl group; and  in formula (3) represents a carbon-carbon saturated or unsaturated bond.