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1. 发明授权

US5565537A Maleimide-based copolymer and process for producing it 失效
标题翻译：马来酰亚胺基共聚物及其制备方法
公开(公告)号：US5565537A
公开(公告)日：1996-10-15
申请号：US466664
申请日：1995-06-06
申请人： Kimio Uda , Fumioki Shimoyama , Kazumi Fujioka
发明人： Kimio Uda , Fumioki Shimoyama , Kazumi Fujioka
IPC分类号： B29B9/12 , B29C47/00 , B29C47/76 , C08F6/00 , C08F222/40 , C08F212/06 , C08F218/02 , C08F220/06
CPC分类号： B29C47/76 , B29B9/12 , B29C47/0014 , C08F6/001 , B29C47/00 , B29K2079/00
摘要： This invention provides a maleimide-based copolymer in which, because its molecular weight-retention ratio at high temperature is high, deterioration of physical properties by heating is little. Also, this invention provides a process wherein a maleimide-based copolymer is arranged so as not to heat more than necessity and thereby a maleimide-based copolymer containing only a small amount of residual volatile components is efficiently obtained without deterioration of physical properties. The maleimide-based copolymer is such as having a glass transition temperature of 170.degree. C. or higher, a weight-average molecular weight of 100,000 to 500,000, and a molecular weight-retention ratio of 90% or more when heated at 280.degree. C. for 10 minutes. When this copolymer is produced, volatile components are separated by supplying a polymer composition containing said copolymer and volatile components to a vent type screw extruder and operating this extruder under condition of a screw rotation number of 50 to 150 rpm.
摘要翻译：本发明提供了一种马来酰亚胺类共聚物，其中，由于其高温下的分子量保持率高，因此加热时的物理性能降低。此外，本发明提供了一种方法，其中马来酰亚胺基共聚物被布置为不加热以上，从而有效地获得仅含少量残留挥发组分的马来酰亚胺基共聚物，而不会降低物理性能。马来酰亚胺类共聚物的玻璃化转变温度为170℃以上，重均分子量为100,000〜500,000，在280℃下加热时的分子量保持率为90％以上 10分钟。当制备该共聚物时，通过向排气式螺杆挤出机提供含有所述共聚物和挥发性组分的聚合物组合物分离挥发性组分，并在螺杆转数为50至150rpm的条件下操作该挤出机。

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