| 摘要 |
Thermosetting compositions comprise, (a) about 10% to about 60% of a polymerizable olefinic monomer such as styrene or vinyl toluene (b) from about 1 to about 40% of a maleimide of the formula: <IMAGE> where R1 and R2 are independently selected from hydrogen or C1-3 alkyl groups, and in which the phenyl group may be substituted with aliphatic, alicyclic, and aromatic groups and up to three halogen or hydroxyl groups, and (c) about 5% to about 89% unsaturated polyester. The compositions are useful for their electrical and heat resistant properties as molding compositions, for the impregnation of electrical coils and for encasing electrical components.
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