Method for making polyetherimide

Details Method for making polyetherimide Method for making polyetherimide

1983-01-21

1983-12-20

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

044219075

ABSTRACT:
Polyetherimides are formed by the dry blending of organodianhydride, organic diamine, and chain stopper and the polymerization of the dry-blended mixture in a continuous, steady state reaction, employing an extruder reactor as the reaction chamber. The extruder reactor is provided with means for heating and cooling, evacuation of water of reaction, and material conveyance means in order to achieve a steady state necessary for continuous production of a uniform polymeric product.

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

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