Mixtures of reactive thermosetting resins which are stable at am

Details Mixtures of reactive thermosetting resins which are stable at am Mixtures of reactive thermosetting resins which are stable at am

1989-09-13

1991-12-24

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 53, 528 55, C08G 1858

Patent

active

050754050

ABSTRACT:
Mixtures of reactive thermosetting resins which are stable at ambient temperature, latent catalyst complexes for hardening said mixtures, processes for their manufacture, and heat-hardened resins obtained from said mixtures. Mixtures of heat-reactive thermosetting resins which are stable at ambient temperature for use in impregnating insulation for electrical materials or in the preparation of molding products or composite materials, comprising liquid oligo- or poly-isocyanate compounds and liquid epoxy resins and a latent hardening catalyst which is inert at ambient temperature and is composed of an addition complex of an amine compound from the group consisting of the amines, the alkylhydrazines and the imidazoles, and a boron halide. They additionally comprise a small quantity of maleic anhydride or the boron halide is boron tribromide with no addition of maleic anhydride. Latent catalyst complexes of these mixtures, formed by the addition complexes of BBr.sub.3 and an amine, an alkylhydrazine or an imidazole. Their manufacturing processes and the resins obtained from said mixtures.

REFERENCES:
patent: 4631306 (1986-12-01), Markert et al.
patent: 4636556 (1987-01-01), Ihlein et al.
patent: 4680222 (1987-07-01), Anton
patent: 4755580 (1988-07-01), Saunders et al.
Karasawa et al., "Thermosetting Resin Compounds," Chemical Abstracts, vol. 90, No. 22, May 1979, p. 52, No. 169687y.

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