Method for preparation of acrylonitrile solutions of maleimides
    6.
    发明公开
    Method for preparation of acrylonitrile solutions of maleimides 失效
    制备马来酰亚胺丙烯腈溶液的方法

    公开(公告)号:EP1293500A3

    公开(公告)日:2003-04-02

    申请号:EP02079410.3

    申请日:1996-08-29

    摘要: A method for the preparation of an acrylonitrile solution manifesting transparency, precluding coloration and opacification during the course of handling, and excelling in stability, is 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 purifying a crude maleimide; applying a primary antioxidant and a secondary antioxidant to the purified maleimide in the molten state; solidifying the molten maleimide by cooling; and subsequently dissolving the solidified maleimide in acrylonitrile.

    摘要翻译: 提供了一种制备丙烯腈溶液的方法,该方法表现出透明性,防止处理过程中的着色和不透明,并且稳定性优异。 马来酰亚胺的丙烯腈溶液在进行强制着色试验时,试验前后的L,a,b各值之差ΔL,Δa,Δb值(总是作为绝对值)为 分别不超过5,不超过5,不超过10.马来酰亚胺的丙烯腈溶液通过纯化粗制马来酰亚胺制备; 将主要抗氧化剂和次要抗氧化剂施加到熔融状态的纯化马来酰亚胺上; 通过冷却使熔化的马来酰亚胺固化; 随后将固化的马来酰亚胺溶解在丙烯腈中。