Copolyimides

Details Copolyimides Copolyimides

1975-05-27

1979-05-08

Michl, Paul R.

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

Synthetic resins

From carboxylic acid or derivative thereof

521110, 521185, 528340, C08G 7310

Patent

active

041537831

ABSTRACT:
Copolyimide foams made from lower alkyl esters of tetracarboxylic acids and two or more diamines. Precursors for such copolyimides. Processes for making the precursors and for converting them to copolyimide foams.

REFERENCES:
patent: 3424718 (1969-01-01), Angelo
patent: 3554935 (1971-01-01), Knapp
patent: 3622525 (1971-11-01), Miller
patent: 3705118 (1972-12-01), Abolafia
patent: 3726834 (1973-04-01), Acle, Jr.
High Polymer Latices, Their Science & Tech., by D. C. Blackley, Applied Science Pub., LTD., London, 1973.

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