申请人:MITSUBISHI RAYON CO., LTD.
公开号:EP0355624A2
公开(公告)日:1990-02-28
A maleimide copolymer which consists essentially of greater than 28% by weight and less than or equal to 65% by weight of a maleimide monomer unit, greater than or equal to 16% by weight and less than 72% by weight of at least one monomer unit selected from the group consisting of aromatic vinyl compound monomer units and methacrylate monomer units, and 0-25% by weight of another vinyl compound monomer unit and which contains 0.1% by weight or less of the residual maleimide monomer and 0.5% by weight or less of volatile components other than the maleimide monomer and which has a ratio (Mw/Mn) of a weight average molecular weight Mw to a number average molecular weight Mn of 3 or less, a yellowish index of 30 or less and an intrinsic viscosity of from 0.3 to 1.5. The maleimide copolymer of the present invention is excellent in heat resistance, transparency, chemical resistance, impact resistance, moldability and the like.
一种马来酰亚胺共聚物,它基本上由按重量计大于 28%但小于或等于 65%的马来酰亚胺单体单元、按重量计大于或等于 16%但小于 72%的选自芳香族乙烯基化合物单体单元和甲基丙烯酸酯单体单元组成的组中的至少一种单体单元以及按重量计 0-25%的另一种乙烯基化合物单体单元组成,它含有 0.1%(以重量计)或更少的残留马来酰亚胺单体和 0.5%(以重量计)或更少的马来酰亚胺单体以外的挥发性成分,其重量平均分子量 Mw 与数均分子量 Mn 之比(Mw/Mn)为 3 或更小、微黄指数为 30 或更小、固有粘度为 0.3 至 1.5。本发明的马来酰亚胺共聚物在耐热性、透明度、耐化学性、抗冲击性、可模塑性等方面都非常出色。