Method for making polyetherimide

Details Method for making polyetherimide Method for making polyetherimide

1983-01-21

1984-04-17

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

264349, 526 65, 526 66, 528 26, 528 28, 528125, 528126, 528173, 528179, 528185, 528188, 528351, 528352, 528353, C08G 7310

Patent

active

044435924

ABSTRACT:
Polyetherimides are formed by the blending of a first melt of organic dianhydride and a second melt of organic diamine and the resulting blend is polymerized in a continuous, steady state manner, employing an extruder reactor as the reaction chamber. The extruder reactor is provided with means for heating, evacuation of water of reaction, and transfer sections in order to achieve the steady state necessary for continuous production of a substantially uniform polyimide.

REFERENCES:
patent: 4011198 (1977-03-01), Takekoshi et al.
patent: 4073773 (1978-02-01), Banucci et al.

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