Acrylonitrile solutions of maleimides, method for preparation thereof, and acrylonitrile based copolymers obtained by use of the solutions
申请人:NIPPON SHOKUBAI CO., LTD.
公开号:EP0768300A1
公开(公告)日:1997-04-16
An acrylonitrile solution of maleimide manifesting transparency, precluding coloration and opacification during the course of handling, and excelling in stability, a method for the preparation of the acrylonitrile solution, and an acrylonitrile based copolymer obtained by using the acrylonitrile solution are provided.
The acrylonitrile solution of maleimide is such that, when it is subjected to a forced coloration test, the differences Δ L, Δa, and Δb values (invariably as absolute values) each between L, a, and b values before and after the test are respectively not more than 5, not more than 5, and not more than 10. The acrylonitrile solution of maleimide is prepared by lowering the water content in the acrylonitrile solution to a level of not more than 0.1% by weight, or causing the acrylonitrile solution to permit coexistence therein of at least one member selected from the group consisting of alkyl-substituted hydroxybenzenes and hindered phenols and at least one member selected from the group consisting of phosphorous esters, phosphoric esters, phosphine, and phosphoric acid amides, or lowering the water content in the acrylonitrile solution to a level of not more than 0.3% by weight and causing the acrylonitrile solution to permit coexistence therein of at least one member selected from the group consisting of alkyl-substituted hydroxybenzenes, hindered phenols, phosphorous esters, phosphoric esters, phosphine, and phosphoric acid amides.
本发明提供了一种马来酰亚胺的丙烯腈溶液,该溶液具有透明性,在处理过程中不会着色和不透明,而且稳定性极佳;还提供了一种丙烯腈溶液的制备方法,以及使用该丙烯腈溶液获得的丙烯腈基共聚物。
马来酰亚胺的丙烯腈溶液在进行强制着色试验时,试验前后 L 值、a 值和 b 值之间的差值 ΔL、Δa 和 Δb(均为绝对值)分别不超过 5、不超过 5 和不超过 10。马来酰亚胺的丙烯腈溶液是通过将丙烯腈溶液中的水含量降低到不超过 0.1%(按重量计),或使丙烯腈溶液允许至少一种选自烷基取代的羟苯和受阻酚组成的组的成员与至少一种选自磷酯、磷酸酯、膦和磷酸酰胺组成的组的成员共存,或将丙烯腈溶液中的水含量降至不超过 0.3%(重量百分比)的水平,并使丙烯腈溶液允许至少一种选自烷基取代的羟基苯、受阻酚、磷酯、磷酸酯、膦和磷酸酰胺的成员共存。