Polyimides and processes for preparaing the same

Details Polyimides and processes for preparaing the same Polyimides and processes for preparaing the same

1994-07-01

1995-12-26

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528172, 528173, 528179, 528183, 528185, 528188, 528220, 528229, 528310, 528350, C08G 7310, C08G 6926

Patent

active

054789141

ABSTRACT:
Polyimides comprising recurring units of the following general formula (1) ##STR1## wherein R.sub.1 represents a tetravalent aromatic group. Polyimide copolymers and preparations of the polyimides and the polyimide copolymers are also described.

REFERENCES:
patent: 4980447 (1990-12-01), Khanna

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