Solutions of polyimidesiloxanes in butyrolactone

Details Solutions of polyimidesiloxanes in butyrolactone Solutions of polyimidesiloxanes in butyrolactone

1989-12-26

1992-04-14

Foelak, Morton

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525426, 528 26, 528 28, 528125, 528128, 528170, 528172, 528173, 528350, 528353, C08F28300, C08G 7704, C08G 6926, C08G 802

Patent

active

051049465

ABSTRACT:
Disclosed is a solution in butyrolactone of a diglyme-insoluble polyimidesiloxane. The polyimidesiloxane is the reaction product of a dianhydride selected from the group consisting of 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride, 3,3',4,4'-oxydiphthalic anhydride, and mixtures thereof, with a mixture of a non-siloxane diamine and a siloxane diamine in a molar ratio of about 0.1 to about 16, where said non-siloxane diamine is selected from the group consisting of 2,4-diaminotoluene, 3,5-diamino-tert-butylbenzene, 2,5-diamino-trifluoromethyl benzene, 2,6-diamino-4-trifluoromethyl pyridine, and mixtures thereof.

REFERENCES:
patent: 3325450 (1967-06-01), Holub
patent: 3553282 (1971-01-01), Holub
patent: 4829131 (1989-05-01), Chung Lee
St. Clair et al., Structure-Solubility Relationship in Polymers, Acadeny Press Inc., N.Y., N.Y. pp. 199-214, 1977.

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