Nancy D Carlson

US Patent:

44120486, Oct 25, 1983

Filed:

Sep 11, 1981

Appl. No.:

6/301169

Inventors:

George D. Dixon - Needham MA
Nancy W. Carlson - Needham MA
Howard E. Saunders - Murrysville PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

C08L 6300
C08L 6302

US Classification:

525524

Abstract:

Disclosed is a solventless UV dryable B-stageable epoxy adhesive which comprises about 40 to about 70 pbw of a solid thermally curable epoxy having a molecular weight between about 650 and about 4000, a thermal curing agent for the thermally curable epoxy which is stable at room temperature and soluble on the adhesive in an amount of about stoichiometric to about 50% by weight in excess of stoichiometric, up to about 2 pbw of an accelerator for the thermal curing agent which is soluble in the adhesive, about 25 to about 60 pbw of a liquid UV curable resin having a molecular weight of less than about 700 which is either an epoxy, an acrylic, or a mixture thereof and which is a diluent for the thermally curable epoxy, about 1 to about 10 pbw of a UV photoinitiator for the UV curable resin, up to about 20 pbw of a reactive diluent, up to about 5 pbw of a flow control agent, up to about 1 pbw of a surfactant, and up to about 10 pbw of a tri or higher functional epoxy.