Method of preparing high purity polyamic acids for use in electr

Details Method of preparing high purity polyamic acids for use in electr Method of preparing high purity polyamic acids for use in electr

1982-01-07

1983-03-08

Lee, Lester L.

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

Synthetic resins

From carboxylic acid or derivative thereof

528188, C08G 7310

Patent

active

043761950

ABSTRACT:
A method of increasing the yield of a high purity polyamic acid that is the reaction product of a diamino compound and a polycarboxylic acid dianhydride, comprises:

REFERENCES:
patent: 4225702 (1980-09-01), Makino et al.
patent: 4269968 (1981-05-01), Duran et al.

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