Process for curing epoxy resin anhydride blends at moderately el

Details Process for curing epoxy resin anhydride blends at moderately el Process for curing epoxy resin anhydride blends at moderately el

1989-08-30

1990-09-04

Nielsen, Earl

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

528110, 528297, 156173, C08G 5942

Patent

active

049541960

ABSTRACT:
Liquid acid anhydrides are excellent curatives for epoxy resins but state of the art processing methods require cures at temperatures in excess of 100.degree. C. to obtain well cured polymers. It has been found that a resinous liquid polyol prepared from a polyol and an epoxy resin in the presence of a quaternary ammonium compound acts as an excellent promoter for the epoxy resin anhydride reaction producing well cured polymers at temperatures of about 70.degree. C. The use of a metallo-organic compound in addition to the resinous polyol provides for rapid gelation and development of cure at 70.degree. C.

REFERENCES:
patent: 2947717 (1960-08-01), Belanger et al.
patent: 2951778 (1960-09-01), Maberlin
patent: 3142657 (1964-07-01), Fisch
patent: 4497945 (1985-02-01), Salloum et al.

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