Thermoplastic copolymers of polysiloxane polycarbonate and...

Details Thermoplastic copolymers of polysiloxane polycarbonate and... Thermoplastic copolymers of polysiloxane polycarbonate and...

C - Chemistry, Metallurgy

08

G

400/5154

C08G 77/42 (2006.01) C08G 63/64 (2006.01) C08G 63/68 (2006.01) C08G 63/695 (2006.01)

Patent

CA 1055641

THERMOPLASTIC COPOLYMERS OF POLYSILOXANE POLYCARBONATE AND POLYESTER CONSTITUENTS Inventor: Dean G. Laurin ABSTRACT OF THE DISCLOSURE There is disclosed thermoplastic silicone copolymers having polyarylacarbonate and polyarylester constituents covalently bound to a polydiorganosiloxane constituent. The copolymer is produced by reacting a dihydric phenol with a difunctional polydiorgano siloxane, an organo-diacid halide or with alkyl or aryl ester of an organo-diacid, with phos- gene or other suitable carbonate precursors. The reactions are carried out in suitable organic solvents that solubilize the reagents and the resultant copolumer, in the presence of conventional catalysts. In another embodiment a solvent sys- tem is eliminated and the condensation polymerization is carried out in a molten system.

255301

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