Method of preparing modified polyimides or poly(amide-tmides)

Details Method of preparing modified polyimides or poly(amide-tmides) Method of preparing modified polyimides or poly(amide-tmides)

1986-02-26

1988-03-29

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525430, 525474, 528 26, 528350, 528351, 528353, C08F28304

Patent

active

047344644

ABSTRACT:
Polyimides or poly(amide-imides), especially those containing a polysiloxane unit are improved by heating such polymers or their polyamic acid precursors with a polyfunctional aromatic compound. The polyfunctional aromatic compound is one which contains at least two reactive groups which may be --NH.sub.2, --COOH, --OH or secondary amino groups with at least one of the reactive groups being --NH.sub.2 or --COOH.

REFERENCES:
patent: 3847867 (1974-11-01), Heath
patent: 3926911 (1975-12-01), Greber et al.
patent: 4395527 (1983-07-01), Berger

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