Maleimide-based copolymer,process for producing it, and thermoplastic resin composition containing the same
申请人:NIPPON SHOKUBAI CO., LTD.
公开号:EP0509459A1
公开(公告)日:1992-10-21
A maleimide-based copolymer is provided, in which the content of compound (X) shown by the formula (I) is controlled in a range of not giving a bad effect on physical properties of the copolymer. Such a copolymer comprises an aromatic vinyl-based monomer unit and a maleimide-based monomer unit as essential components, proportion y of the maleimide-based monomer unit in structure is 35 to 65 % by weight, and a content of the compound (X) is 3 % or less and also, does not exceed a numeral value of 0.06y. The copolymer is prepared by radical copolymerization which is carried out by supplying gradually an aromatic vinyl-based monomer and a maleimide-based monomer into a reaction vessel under a condition of keeping these monomers separating without mixing together beforehand.
本发明提供了一种马来酰亚胺基共聚物,其中式(I)所示化合物(X)的含量控制在不会对共聚物的物理性质产生不良影响的范围内。这种共聚物由芳香乙烯基单体单元和马来酰亚胺基单体单元作为基本成分组成,马来酰亚胺基单体单元在结构上的比例 y 为 35% 至 65%(按重量计),化合物 (X) 的含量为 3% 或更少,并且不超过 0.06y 的数值。该共聚物是通过自由基共聚制备的,其方法是将芳香族乙烯基单体和马来酰亚胺基单体逐渐加入反应容器中,在保持这些单体分离的条件下,事先不将它们混合在一起。