Polyimides and processes for preparing the same

Details Polyimides and processes for preparing the same Polyimides and processes for preparing the same

1994-06-17

1996-02-27

Hampton-Hightower, P.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528128, 528170, 528172, 528173, 528183, 528184, 528188, 528220, 528229, 528310, 528322, 528353, C08G 7310, C08G 6926

Patent

active

054949912

ABSTRACT:
Polyimides comprising recurring units of the following general formula (1) ##STR1## wherein Ar.sub.1 represents a tetravalent aromatic group and each Ar.sub.2 represents a divalent aromatic group. Polyimide copolymers and preparations of the polyimides and the polyimide copolymers are also described.

REFERENCES:
patent: 4978734 (1990-12-01), Khanna
patent: 4980447 (1990-12-01), Khanna
patent: 5173561 (1992-12-01), Gupta
Journal of Polymer Science Part A: Polymer Chemistry, 31(4) 1029-1033 Mar. 30, (1993), Sakaguchi et al.

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