Thermosetting composition from a bis-maleimide and N-vinyl pyrrolidone
US4111919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1976 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Aug 31, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.