Patent · US Expired

Sulfonated silicones and methods for their production

US5326890A · kind A · utility

2Cited by

8References

40Claims

0Family size

Assignee

Rensselaer Polytechnic Institute · US

Inventors

Gary Wnek · Cleveland, US
Jun Liu · Dressendorf, DE

Key dates

Filing date	Oct 16, 1992
Grant date	Jul 5, 1994
Priority date	—
Expiry date	Oct 16, 2012

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/392
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.