| abstract |
ABSTRACT An improvement in curable compositions which comprise a polyglycidyl ether such as the triglycidyl-ether of tris(hydroxyphenyl)methane and a halogenated dihydric phenol such as tetrabromobisphenol A, the improvement being employing as the halogenated dihydric phenol one in which the halogen atoms are meta with respect to the hydroxyl groups such as 2,2',6,6'-tetra-bromo-3,3',5,5'-tetramethyl-4.4'-biphenol. These compositions can be cured by heating in the presence or absence of a catalyst for reacting epoxy groups with phenolic hydroxyl groups such as 2-methyl imidazole. These compositions are particularly useful in the preparation of electrical laminates. 34,397B-F |