Epoxy crosslinked copolymers of polyanhydrides and laminates the

Details Epoxy crosslinked copolymers of polyanhydrides and laminates the Epoxy crosslinked copolymers of polyanhydrides and laminates the

1985-04-04

1986-11-18

Nielsen, Earl

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428416, 428901, 523439, 525109, 525117, 528 99, C08F22208, C08G 5944, C08G 7310

Patent

active

046235787

ABSTRACT:
The invention discloses a polyfunctional imide-containing phenolic imide which is the reaction product of a polyanhydride having at least three anhydride groups and aromatic compound having a single aromatic primary amine group. A varnish is prepared by the addition of an epoxy crosslinking agent to the imide. Fibrous substrates can be impregnated with the varnish and partially cured to prepare prepregs, and stacks of prepregs can then be heated and pressed to prepare laminates or printed circuit boards.

REFERENCES:
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patent: 4012350 (1977-03-01), Burke et al.
patent: 4056506 (1977-11-01), Heilman et al.
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patent: 4273889 (1981-06-01), Yamazaki et al.
patent: 4388451 (1983-06-01), Culbertson et al.
Sroog, "Polyimides", J. Poly. Sci.: Part C, No. 16, 1191-1209, (1967).

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