COPOLYMER HAVING ACENAPHTHYLENE DERIVATIVE,AND MOLDING MATERIAL, SHEET OR FILM AND OPTICAL PART OBTAINED FROM THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a resin composition which has an excellent heat resistance and optical character as well as low hygroscopic property and low permittivity.;SOLUTION: The copolymer consists of at least a kind of vinyl monomer which can copolymerize at least a kind of acenaphthylene derivative shown by formula (I) and the acenaphthylene derivative, and is characterized by having the weight average molecular weight of 5×104 or more. (In the formula R1, R2, R3, R4, R5 or R6 may be the same or different and shows a hydrogen atom; a nitrogen atom, an oxygen atom or a univalent hydrocarbon group having a silicon atom; a 1-6C alkyl group; a univalent aromatic hydrocarbon group; a halogen atom, an acyl group; an alkoxy group or a nitrile group).;COPYRIGHT: (C)2002,JPO