Process for producing polyisoimide

Details Process for producing polyisoimide Process for producing polyisoimide

1991-12-11

1994-03-15

Foelak, Morton

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

Synthetic resins

From carboxylic acid or derivative thereof

528 26, 528 33, 528 34, 528 38, 528125, 528128, 528170, 528173, 528179, 528183, 528185, 528188, 528220, 528229, 528350, 528351, C08G 7310, C08G 6926

Patent

active

052946967

ABSTRACT:
The present invention provides a dehydrating agent which is less poisonous and which can be easily handled in producing a polyisoimide by dehydrating a polyamic acid. A process is also provided for producing a polyisoimide without requiring the separation of by-products.
That is, the process for producing the polyisoimide of the present invention includes the step of using a dihyroquinoline derivative represented by the formula ##STR1## (wherein each R.sup.1 and R.sup.2 is independently a monovalent organic group having 1 to 8 carbon atoms) as the dehydrating agent in producing the polyisoimide by dehydrating the polyamic acid.

REFERENCES:
patent: 3271366 (1966-09-01), Kreuz
patent: 3282898 (1966-11-01), Angelo
patent: 3947402 (1992-03-01), Volkommer et al.
patent: 4438273 (1984-03-01), Landis
patent: 4699803 (1987-10-01), Araps et al.
patent: 5096999 (1992-03-01), Hellmut et al.
Derwent Publication Ltd., London, GB; AN89-170548 of Japanese Patent Application Nos. JP-A-1 113 434.
Derwent Publication Ltd., London, GB; AN 86-207382 of Japanese Patent Application No. JP-A-61 138 629.
CA 114(20): 186360t.

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