Polyimide and process for producing the same

Details Polyimide and process for producing the same Polyimide and process for producing the same

1996-03-01

1997-09-02

Clark, W. Robinson H.

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

Synthetic resins

From carboxylic acid or derivative thereof

528352, 528353, 528360, 528363, 528367, 528310, 528171, 528172, 528176, 528184, 528185, 528188, C08G 7310

Patent

active

056632878

ABSTRACT:
The present invention provide a novel polyimide which is soluble in organic solvents and excels in heat resistance, and to a process for producing the polyimide. The polyimide of the present invention comprises a repeating unit represented by the formula (1) and having a number average molecular weight of from 4,000 to 200,000. ##STR1## wherein X is --SO.sub.2 -- or --C(.dbd.O)--OCH.sub.2 CH.sub.2 O--C(.dbd.O)--, and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

REFERENCES:
patent: 5508357 (1996-04-01), Matsuura et al.
patent: 5510425 (1996-04-01), Matsuura et al.

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