Curable compositions containing an epoxy resin, a difunctional p

Details Curable compositions containing an epoxy resin, a difunctional p Curable compositions containing an epoxy resin, a difunctional p

1988-08-15

1989-10-17

Nielsen, Earl

Stock material or miscellaneous articles

Composite

Of epoxy ether

523454, 525481, 525501, 525523, 528 89, 528 90, 528 91, 528 93, 528 98, 528 94, 528104, 428415, C08G 5908, C08G 5932, C08L 6304

Patent

active

048746690

ABSTRACT:
Electrical laminates are prepared from prepreg materials prepared by impregnating a substrate with a laminating varnish comprising a ketone solvent solution of a curable composition comprising (A) at least one aromatic based epoxy resin having an average number of epoxide groups per molecule of more than 2; (B) a mixture of (1) 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 (2) at least one phenolic hydroxyl-containing compound having an average of more than 2 phenolic hydroxyl groups per molecule; and (C), optionally, at least one catalyst for effecting the reaction between (A) and (B).

REFERENCES:
patent: 3264369 (1966-08-01), Ephraim
patent: 3383433 (1968-05-01), Salensky
patent: 3493630 (1970-02-01), Salensky
patent: 3687894 (1972-09-01), Collings et al.
patent: 3738862 (1973-06-01), Klarquist et al.
patent: 3931109 (1976-01-01), Martin
patent: 4322456 (1982-03-01), Martin
patent: 4343731 (1982-08-01), Pucci et al.
patent: 4368299 (1983-01-01), Watanabe et al.
patent: 4440914 (1984-04-01), Helfand et al.
patent: 4552814 (1985-11-01), Cavitt et al.
patent: 4604317 (1986-08-01), Berman et al.
patent: 4684700 (1987-08-01), Wang et al.
Derwent Abstract 86-235231/36-Jap. 61/163,925, Matsushita Electric Works.
Derwent Abstract 87-068076/10-Jap. 62/020,519, Matsushita Electric Works.
Derwent Abstract 86-031993/05-Jap. 60/252,620, Mitsubishi Gas Chemicals.

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