High temperature resistant polyimide from tetra ester, diamine,

Details High temperature resistant polyimide from tetra ester, diamine, High temperature resistant polyimide from tetra ester, diamine,

1982-10-13

1985-12-24

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528229, 528322, 528345, C08G 6926

Patent

active

045607427

ABSTRACT:
The invention described relates to improved polyimide resins which are noted for their high thermal and oxidative stability, high strength at elevated temperatures and which exhibit many other outstanding physical and chemical properties, especially useful in high temperature applications.
The polyimides are prepared by the reaction, with application of heat of a mixture of monomers comprising (a) a dialkyl or tetraalkyl ester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, (3) a monoalkyl or dialkyl ester of a dicarboxylic acid, and (d) a N-arylnadimide such as N-phenylnadimide.
Polyimides of monomers (a), (b) and (c) are known.

REFERENCES:
patent: 4338430 (1982-07-01), Edelman
patent: 4455418 (1984-06-01), Lauver
Cols. 1-2, 35-36 of U.S. Pat. No. 3,306,875.

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