Curable compositions containing a polyepoxide and a halogenated

Details Curable compositions containing a polyepoxide and a halogenated Curable compositions containing a polyepoxide and a halogenated

1987-03-11

1988-11-08

Kight, John

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428273, 523400, 525482, 525505, 525507, 525523, 528 90, 528 98, 528 99, 528102, B05D 300, C08G 6508

Patent

active

047833637

ABSTRACT:
An improvement in curable compositions which comprise a polyglycidyl ether such as the triglycidylether 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'-tetrabromo-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.

REFERENCES:
patent: 3723335 (1973-03-01), Tanaka et al.
patent: 4604317 (1986-08-01), Berman et al.
Application Ser. No. 851,996 filed Apr. 4, 1986.

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