Composite material having an expanded, cured epoxy resin layer,

Details Composite material having an expanded, cured epoxy resin layer, Composite material having an expanded, cured epoxy resin layer,

1992-07-27

1993-03-23

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

427373, 4283144, 4283186, 4283188, 4283191, 428417, 428418, 521 51, 521135, B32B 326, B32B 2738, B32B 514

Patent

active

051962616

ABSTRACT:
A composite material having a substrate and an expanded, cured layer of an epoxy resin composition which is provided over a surface of the substrate and in which a major portion of the cells are present in a location adjacent to the interface between the substrate and the expanded layer and substantially no cells are present on the top surface portion of the expanded layer. The epoxy resin composition includes an acid anhydride curing agent and an alkali metal carbonate blowing agent. The composition is coated over the substrate and the coating is heated to sure and expand the composition while maintaining the top surface of the coating below the expansion temperature.

REFERENCES:
patent: 4378395 (1983-03-01), Asoshima et al.
patent: 4399174 (1983-08-01), Tanaka et al.

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