Thermosetting resin composition and prepolymer obtained therefro

Details Thermosetting resin composition and prepolymer obtained therefro Thermosetting resin composition and prepolymer obtained therefro

1987-04-24

1988-06-21

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526262, C08F 2240

Patent

active

047526416

ABSTRACT:
A thermosetting resin composition comprising (a) a polyfunctional maleimide, (b) at least one member selected from the group consisting of alkenylphenols and alkenylphenol ethers, and (c) an allyl ester of polyvalent carboxylic acid, or cyanuric or isocyanuric acid and a prepolymer obtained by preliminarily heating the thermosetting resin composition can be used as a solventless type varnish for impregnating, e.g. electric windings, or for preparing a prepreg, and can give a cured product with heating at 120.degree.-250.degree. C. having excellent heat resistance of class C (180.degree. C. or higher) and electrical insulating properties.

REFERENCES:
patent: 4463147 (1984-07-01), Diethelm

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