Thermosetting composition from a bis-maleimide and N-vinyl pyrro

Details Thermosetting composition from a bis-maleimide and N-vinyl pyrro Thermosetting composition from a bis-maleimide and N-vinyl pyrro

1976-08-31

1978-09-05

Anderson, Harold D.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

521147, 260857, C08G 6926

Patent

active

041119193

ABSTRACT:
A thermosetting composition is disclosed characterized in that it comprises (by weight) from 60 to 90% of a bis-maleimide of the formula: ##STR1## in which A represents a divalent radical chosen from the group consisting of phenylene radicals and radicals of the formula: ##STR2## where T represents --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --O-- or --SO.sub.2 --; and from 10 to 40% of N-vinylpyrrolid-2-one. The preferred bis-maleimide is N,N'-(4,4'-diphenylmethane)-bis-maleimide. The composition may be modified by the addition of an unsaturated polyester. The composition is useful for the manufacture of molded articles or of articles having a cellular structure, or for the impregnation of electrical coils.

REFERENCES:
patent: 3712933 (1973-01-01), Ducloux et al.
patent: 3761430 (1973-09-01), Witzel
patent: 4035345 (1977-07-01), Ducloux et al.

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