Urea-isocyanurate copolymers
    3.
    发明授权
    Urea-isocyanurate copolymers 失效
    尿素 - 异氰脲酸酯共聚物

    公开(公告)号:US5374703A

    公开(公告)日:1994-12-20

    申请号:US90636

    申请日:1993-07-13

    摘要: Urea-isocyanurate copolymers are obtained by the reaction of:(a) an organic polyisocyanate compound,(b) a polyamino compound having at least two amino groups connected by a flexible chain, and(c) optionally an amino chain extender in which the amino groups are substantially less reactive towards the polyisocyanate (a) than are the amino groups of compound (b), the reaction being effected in the presence of(d) a trimerisation catalyst effective to convert a polyisocyanate to a polyisocyanurate in the reaction the ratio of the number of equivalents of isocyanate groups to the total number of moles of amino groups is at least 8.7, and the ratio of the number of equivalents of chain extender (c)--if used--to the number of equivalents of polyamino compound (b) is a maximum of 5:1.The copolymers are especially useful for producing articles by Structural Reaction Injection Moulding.

    摘要翻译: 尿素 - 异氰脲酸酯共聚物通过以下反应获得:(a)有机多异氰酸酯化合物,(b)具有至少两个通过柔性链连接的氨基的聚氨基化合物,和(c)任选的氨基增链剂,其中氨基 基团比化合物(b)的氨基基本上对多异氰酸酯(a)的反应性基本上更低的反应,该反应在(d)三聚催化剂存在下进行,所述三聚催化剂在反应中有效将多异氰酸酯转化为聚异氰脲酸酯, 异氰酸酯基相对于氨基总摩尔数的当量数至少为8.7,而使用的扩链剂(c)的当量数与聚氨基化合物(b)的当量数之比为 最多为5:1。 该共聚物特别适用于通过结构反应注射成型生产制品。