Sulfonated silicones and methods for their production

Details Sulfonated silicones and methods for their production Sulfonated silicones and methods for their production

1992-10-16

1994-07-05

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

556428, 528 25, 528 32, 528 41, C07F 708

Patent

active

053268903

ABSTRACT:
A process for the preparation of sulfonated silicones is disclosed. The process comprises the steps of (a) hydrosilylating an olefin-terminal silylketene acetal with a hydrosiloxane; (b) treating the ketene acetal with a trialkylsilylsulfonyl chloride and (c) hydrolyzing the resulting .alpha.-trialkylsilyl ester to provide a salt of an .alpha.-sulfonate. Useful products of the process are also disclosed; they comprise several genera of .alpha.-sulfonate esters pendant from siloxanes and polysiloxanes. The products are useful as polymer electrolytes and as sustained or controlled release substrates for the administration of medicines.

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Zhou et al. "Cation transport polymer electrolytes. Siloxane comb polymers with pendant oligo-oxyethylene chains and sulphonate groups" Polym. Comm. 30, 52-54 (1989).
Liu and Wnek "Novel Synthesis of Sulfonated Silicones" Polym. Prepr., 33, 970-972 (1992).
Yang and Wnek "Synthesis of Polysiloxanes Bearing Polar Groups" Polymer Prepr. 30 177 (1989).

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