Preparation of a thermosetting resin article

Details Preparation of a thermosetting resin article Preparation of a thermosetting resin article

1973-04-16

1976-01-06

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156219, 156295, 156299, 427244, 427369, 428311, 428315, B29D 2700

Patent

active

039309193

ABSTRACT:
This invention is an improvement in a process for making a thermosetting resin article.
In the process of producing an article of thermosetting resin which comprises (a) impregnating a sheet having an open-cell structure with a curable thermosetting resin, (b) applying a layer of fibrous reinforcing material to at least one side of the impregnated sheet, (c) compressing the sheet and reinforcing layer to the extent that resin is expelled from the sheet into the fibrous reinforcing layer and (d) allowing the resin in the sheet and layer to cure while maintaining the compression, the improvement which comprises uniformly incorporating a gas release agent into the curable thermosetting resin to promote the expulsion of resin from the sheet into the reinforcing layer.
The invention also includes an open-cell sheet impregnated with a mixture of a curable thermosetting resin, an effective curing agent for said resin, and a compatible gas release agent.

REFERENCES:
patent: 3118800 (1964-01-01), Snelling
patent: 3293094 (1966-12-01), Nairn et al.
patent: 3386878 (1968-06-01), Podley
patent: 3433700 (1969-03-01), Migdol et al.
patent: 3458337 (1969-07-01), Rugg
patent: 3607341 (1971-09-01), Goins et al.
patent: 3607593 (1971-09-01), Semenzato
patent: 3627603 (1971-12-01), Greig
patent: 3745040 (1973-07-01), Morton et al.

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