Method of making diglyme soluble siloxane-imide copolymers

Details Method of making diglyme soluble siloxane-imide copolymers Method of making diglyme soluble siloxane-imide copolymers

1984-10-19

1987-10-20

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 38, 524755, C08G 7706

Patent

active

047015110

ABSTRACT:
There is provided a process for making diglyme soluble siloxane-imide copolymers consisting essentially of (a) heating a mixture of diglyme, azeotropic solvent, organic diamine and bis-aminoalkyl-terminated polydiorganosiloxane to reflux and (b) adding to the refluxing mixture of (a) an organic dianhydride of the formula ##STR1## where Ar is an aromatic or aromatic containing group and Y is oxygen or sulfur. Block copolymers are obtained if the bis-aminoalkyl-terminated polydiorganosiloxane is not added to the reaction mass until after the reaction of the organic diamine and organic dianhydride has been completed.

REFERENCES:
patent: 3325450 (1967-06-01), Holub
patent: 4030948 (1977-06-01), Berger
patent: 4140572 (1979-02-01), Stein
patent: 4331799 (1982-05-01), Holub et al.
patent: 4499149 (1985-02-01), Berger
William S. Shore, "Synthesis of Imide-Siloxane and Amide Siloxane Copolymers", May 1973, pp. 4-6, National Technical Information Service, U.S. Dept. of Commerce.
S. Maudgal et al., Preparation and Characterization of Siloxane-Containing Thermoplastic Polyimides", Apr. 1984, pp. 87-91, Int. J. Adhesion & Adhesives, vol. 4, No. 2.

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