Patent ID: 7662906

Claim:
A polyvinyl benzyl ether compound (C) obtained by vinyl-benzylating a phenolic hydroxyl group of a polyfunctional phenylene ether oligomer (B) having 3 to less than 9 phenolic hydroxyl groups, the polyfunctional phenylene ether oligomer (B) being obtained by reacting a polyfunctional phenol (A) having 3 to less than 9 phenolic hydroxyl groups per molecule and having two groups which are the same or different and are selected from the group consisting of an alkyl group and an alkylene group at 2-and 6-positions of at least one of the 3 to less than 9 phenolic hydroxyl groups with a monohydric phenol compound represented by the formula (1), wherein R 1 and R 2 are the same or different and represent a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, and R 3 and R 4 are the same or different and represent a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, and wherein the polyfunctional phenol (A) is at least one compound selected from the group consisting of a compound represented by the formula (4), a compound represented by the formula (5) and a compound represented by the formula (7), wherein X is a hydrocarbon having 1 carbon atom, R 11 and R 12 are the same or different and represent an alkyl group having 6 or less carbon atoms, R 13, R 14, R 15 and R 16 are the same or different and represent a hydrogen atom, a halogen atom, an alkoxy group, an alkyl group having 6 or less carbon atoms or a phenyl group, and R 17, R 18, R 19, R 20, R 21 and R 22 are the same or different and represent a hydrogen atom, an alkoxy group, an alkyl group having 6 or less carbon atoms or a phenyl group, wherein Y is a hydrocarbon having 1 to 20 carbon atoms, R 31 and R 32 are the same or different and represent an alkyl group having 6 or less carbon atoms, R 33, R 34, R 35, R 36, R 37 and R 38 are the same or different and represent a hydrogen atom, a halogen atom, an alkoxy group, an alkyl group having 6 or less carbon atoms or a phenyl group, and R 39, R 40, R 41, R 42, R 43, R 44, R 45 and R 46 are the same or different and represent a hydrogen atom, an alkoxy group, an alkyl group having 6 or less carbon atoms or a phenyl group, wherein Z is a phenylene group which has a hydroxyl group at least one position and may have substituent(s) at other positions, at least one of R 51, R 53 and R 55 represents a hydroxyl group and the others each represent a hydrogen atom, an alkoxy group, an alkyl group having 6 or less carbon atoms or a phenyl group, and each of R 52 and R 54 represents a hydrogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, provided that two groups which are the same or different and are selected from the group consisting of an alkyl group and an alkylene group are present at 2- and 6-positions of at least one hydroxyl group in a molecule.