Patent ID: 8404797
Filing Date: 2013-03-26
Classification: C08F,G03F

Abstract:
1. A soluble polyfunctional vinyl aromatic copolymer, comprising a copolymer which is obtained by allowing the following compounds to react through a cation copolymerization with each other: a divinyl aromatic compound (a); a monovinyl aromatic compound (b); and an aromatic ether compound (c), wherein: the copolymer has, at an end, an end group derived from the aromatic ether compound (c), wherein said end group is represented by the following formula (1): where: R the copolymer has a number average molecular weight Mn of 500 to 100,000; the copolymer has a molecular weight distribution (Mw/Mn) of 100.0 or less, the molecular weight distribution being represented by a ratio of a weight average molecular weight Mw to a number average molecular weight Mn; an introduction amount (c1) of the end group satisfies the following inequality (2): a molar fraction a′ of a structural unit derived from the divinyl aromatic compound, a molar fraction b′ of a structural unit derived from the monovinyl aromatic compound, and a molar fraction c′ of the end group in the copolymer satisfy relationships of the following inequalities (3) and (4): the copolymer is soluble in toluene, xylene, tetrahydrofuran, dichloroethane, or chloroform.