Title:
MALEIMIDE COPOLYMER
Document Type and Number:
Japanese Patent JPH03255108
Kind Code:
A
Abstract:
PURPOSE:To obtain a maleimide copolymer which is lowly birefringent and is improved in heat resistance and transparency by copolymerizing an aromatic vinyl monomer with a specified maleimide monomer and another vinyl monomer copolymerizable therewith. CONSTITUTION:40-95wt.% aromatic vinyl monomer (e.g. styrene) is copolymerized with 5-60wt.% maleimide monomer of the formula [wherein R is H or a 1-20C (un)substituted alkyl] and 0-50wt.% another vinyl monomer copolymerizable therewith (e.g. acrylonitrile) in the presence or absence of a radical polymerization initiator to obtain a maleimide copolymer of an intrinsic viscosity (at 30 deg.C) of 0.10-1.50. This copolymer can be molded under the conditions of a cylinder temperature of 200-360 deg.C and a mold temperature of 30-120 deg.C.
Inventors:
TANAKA MASAYUKI
YOKOIKAWA TAKUMI
KISHIMOTO AKIHIKO
YOKOIKAWA TAKUMI
KISHIMOTO AKIHIKO
Application Number:
JP16746390A
Publication Date:
November 14, 1991
Filing Date:
June 25, 1990
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08F212/04; C08F22/36; C08F212/00; C08F220/10; C08F220/18; C08F220/42; C08F220/44; C08F222/40; (IPC1-7): C08F212/04; C08F220/18; C08F220/44; C08F222/40