Disclosed are crosslinkable polymeric compositions which show a low content of vinyl monomers, are suitable for the fabrication of composite materials having good mechanical properties and comprise:
(A)a liquid polyisocyanate;
(B)a polyol having a maximum functionality of 7 and an average molecular weight of from about 200 to about 10,000;
(C)a vinylester resin or unsaturated polyester resin;
(D)a radical polymerization initiator stable at temperatures below 70°C;
(E)a decomposition promoter for the initiator (D);
(F)a trimerization catalyst for the isocyanate (A);
(G)optionally, a mineral filler having dehydrating properties.
所公开的可交联聚合物组合物中
乙烯基单体的含量较低,适用于制造具有良好机械性能的复合材料,其中包括
(A) 液体多
异氰酸酯;
(B)一种多元醇,其最大官能度为 7,平均分子量约为 200 至 10 000;
(C)
乙烯酯
树脂或不饱和聚酯
树脂;
(D) 在低于 70°C 的温度下稳定的自由基聚合
引发剂;
(E)
引发剂(D)的分解
促进剂
(F)
异氰酸酯 (A) 的三聚催化剂;
(G) 可选的具有脱
水特性的矿物填料。