haerdbara kompositioner som innehaoller i polyepoxid och i halogenerad tvaobasisk fenol samt av system framstaellda impregnerade substrat och laminat.

摘要

Curable compositions which comprise at least one polyglycidyl ether such as the triglycidylether of tris(hydroxyphenyl)methane and at least one halogenated dihydric phenol such as tetrabromobisphenol A. The polyglycidyl ether and the halogenated dihydric phenol are present in quantities such that the ration of phenolic hydroxyl groups to epoxide groups is from 0.7:1 to 1.1:1. These compositions can be cured by heating in the presence or absence of catalyst for reacting epoxy groups with phenolic hydroxyl groups. These compositions are particularly useful in the preparation of electrical laminates.