Thermoset products are prepared by polymerizing (A) at least one thermosettable compound which contains both a maleimide group and a cyanate group such as 3-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenyl cyanate and optionally (B) at least one of (1) at least one aromatic polycyanate such as bisphenol A dicyanate; (2) at least one polymaleimide such as N,N'-(methylenedi-p-phenylene)bismaleimide; (3) at least one material having an average of more than one vicinal epoxide group per molecule such as a diglycidyl ether of bisphenol A; (4) at least one polymerizable ethylenically unsaturated material such as styrene; or (5) a mixture of any two or more of components 1-4 in any combination.
热固性产品是通过聚合(A)至少含有男
酰亚胺基团和
氰酸酯基团的热固性化合物,例如3-(2,5-二氢-2,5-二氧代-1H-
吡咯-1-基)苯基
氰酸酯,以及可选的(B)至少含有以下之一的材料制备而成:(1)至少含有一个芳香族多
氰酸酯,如
双酚A二
氰酸酯;(2)至少含有一个多男
酰亚胺,如N,N'-(亚甲基二-p-苯撑)双男
酰亚胺;(3)至少含有一个平均每分子多于一个邻二氧化物基团的材料,如
双酚A的
二缩水甘油醚;(4)至少含有一个可聚合的
乙烯基不饱和材料,如
苯乙烯;或者(5)任意两种或以上的1-4组分的混合物,以任何组合方式。