Heat-stable polyimides and polyamide-imides with modified benzhy

Details Heat-stable polyimides and polyamide-imides with modified benzhy Heat-stable polyimides and polyamide-imides with modified benzhy

1993-09-13

1995-01-03

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528170, 528220, 528229, 5283291, 528331, 528352, 528353, 525432, 525436, C08G 6926, C08G 7310

Patent

active

053787994

ABSTRACT:
Heat-stable polyimides and polyamideimides with modified benzhydrol structural elements and a process of preparing thereof; wherein the polyimides and polyamideimides are obtained by reacting 3,3'4,4'-benzhydroltetracarboxylic acid dimethyl ester a) with only a diamine and then cyclized to give polyimides or b) with a diamine and with trimellitic, phthalic-or isophthalic acid (or the anhydrides, acid chlorides, anhydride chlorides or esters) and is then cyclized to give polyamideimides.

REFERENCES:
patent: 3654227 (1972-04-01), Dine-Hart
patent: 3895064 (1975-07-01), Brode et al.
patent: 3939109 (1976-02-01), Barie, Jr. et al.
patent: 4645821 (1987-02-01), Malinge et al.
patent: 4736015 (1988-04-01), Rabilloud et al.
patent: 4987218 (1991-01-01), Malinge et al.
patent: 5071452 (1991-12-01), Avrillon et al.
patent: 5118765 (1992-06-01), Greber et al.
patent: 5164476 (1992-11-01), Greber et al.
Chem. Abstract 111:174893 (1989)-Abstract of EP-A1-0 309 338.
Chem. Abstract 83:194089 (1975)-Abstract of SU 475376.

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