Polysiloxanes with at least one sulfatohexyl group linked by an Si-C bond

US5281687A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Stefan Busch · Mülheim an der Ruhr, DE
• Peter Lersch · Oberhausen, DE
• Dietmar Schaefer · Hattingen, DE
• Dietmar Wewers · Bottrop, DE

Key dates

• Filing date: Dec 9, 1992
• Grant date: Jan 25, 1994
• Expiry date: Dec 9, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/045
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polysiloxanes of the general formula ##STR1## which contain at least one sulfatohexyl group linked by an Si--C bond are prepared wherein R.sup.1 is a methyl or phenyl group with the proviso that at least 90% of the R.sup.1 groups are methyl groups, R.sup.2 either is identical with R.sup.1 or is --(CH.sub.2).sub.6 --OSO.sub.3.sup.-.M.sup.+, M.sup.+ being an alkali, 1/2 alkaline earth or optionally an alkyl-substituted ammonium ion, R.sup.3 is identical with R.sup.1 or R.sup.2, with the proviso that at least one R.sup.2 or R.sup.3 group in the average molecule is a --(CH.sub.2).sub.6 --OSO3.sup.-.M.sup.+ group, "a"=0 to 5 and b=0 to 5. A method for the synthesis of these compounds and their use as hydrolysis-resistant surfactants is also described.