Polyimide AMD process for producing the same

Details Polyimide AMD process for producing the same Polyimide AMD process for producing the same

1996-05-17

1997-12-09

Seidleck, James J.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528171, 528172, 528173, 528176, 528183, 528185, 528188, 528220, 528229, 528310, 528322, 528350, C08G 7310, C08G 6926

Patent

active

056962355

ABSTRACT:
Novel polyimides which are soluble in various organic solvents and excellent in thermal resistance, processability are disclosed. The polyimides comprise repeating units represented by the following formula (1) and/or (2) and having a number average molecular weight of 4,000-200,000. ##STR1## wherein Ar is a divalent group represented by the following formula (2) or (3): ##STR2## wherein Y is --O--, --CO--, --S--, --SO.sub.2 -- or --C(CH.sub.3).sub.2 --, ##STR3## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a C.sub.1-4 alkyl group or a C.sub.1-4 alkoxy group, Ra is a divalent group having 2-6 benzene rings, X.sup.1 represents NH, NR (wherein R is a C.sub.1-4 alkyl group or a C.sub.1-4 alkoxy group) or S, Rb is C.sub.2-20 alkylene group, ether group or dimethylsiloxane group, and X.sub.2 represents NH, NR (wherein R is a C.sub.1-4 alkyl group or a C.sub.1-4 alkoxy group), ##STR4##

REFERENCES:
patent: 3741942 (1973-06-01), Crivello
patent: 5093459 (1992-03-01), Peter et al.
patent: 5106937 (1992-04-01), Yamaya et al.
patent: 5194567 (1993-03-01), Lewis
patent: 5457154 (1995-10-01), Ohta et al.
Organic Synthetic Chemistry, vol.43, No. 10 by Yoshio Imai pp. 932-940, (with its excerpt Japanese translation, Synthesis of Condensation Polymers by Michael-Tyoe addition Reaction.)(2-12-1).

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