Laminating varnish composition containing a difunctional epoxy r

Details Laminating varnish composition containing a difunctional epoxy r Laminating varnish composition containing a difunctional epoxy r

1989-06-27

1990-09-25

Nielsen, Earl

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 88, 528 89, 528 90, 528 91, 528 93, 528 94, 528 98, 528 99, 528102, 528103, 528104, 428416, 428418, C08G 5908, C08G 5932, C08L 6304

Patent

active

049594257

ABSTRACT:
Electrical laminates are prepared from prepreg materials prepared by impregnating a substrate with a laminating varnish comprising a solvent solution of a curable composition comprising (A) a mixture of at least one epoxy resing having an average of more than 1 but not more than 2 vicinal epoxy groups per molecule and at least one epoxy resin having an average of more than 2 vicinal epoxy groups per molecule; (B) a mixture of at least one phenolic hydroxyl-containing compound having an average of more than 1 but not more than 2 phenolic hydroxyl groups per molecule and at least one phenolic hydroxyl-containing compound having an average of more than 2 phenolic hydroxyl groups per molecule; and (C) at least one catalyst for effecting the reaction between (A) and (B).

REFERENCES:
patent: 4874669 (1989-10-01), Larson et al.

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