Process for making moulded articles of epoxy resin compositions

Details Process for making moulded articles of epoxy resin compositions Process for making moulded articles of epoxy resin compositions

1993-12-14

1996-04-09

Bleutge, John C.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26432813, 26433112, 523458, 523466, 525533, B29C 4573

Patent

active

055058957

ABSTRACT:
A process for making a cured plastics moulding by introducing a pre-heated curable resin composition to a hotter mould which is at a temperature high enough to initiate curing of the resin, and supplying further resin under pressure to compensate for shrinkage of the composition wherein the curable resin is a formulation comprising an aromatic glycidyl ether epoxy resin, an inert filler, a quaternary ammonium or phosphonium salt as accelerator, 0.5-1.2 mol per mol epoxy of a saturated cycloaliphatic anhydride and a polycarboxylic acid preferably derived from the reaction of a polyol, this acid being present at a level of 0.05-0.5 mol carboxyl per mol epoxy.

REFERENCES:
patent: 2947717 (1960-08-01), Belanger
patent: 3954712 (1976-05-01), Lottanti
H. Lee & K. Neville, "Handbook of Epoxy Resins", McGraw-Hill Book Co., New York, pp. 12/35-12/36 (1982-Reissue).

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