Silanes with hydrophilic groups, their synthesis and use as surfactants in aqueous media

US5430166A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Klaus-Dieter Klein · Oberkochen, DE
• Wilfried Knott · Essen, DE
• Gotz Koerner · Essen, DE

Key dates

• Filing date: Jun 24, 1994
• Grant date: Jul 4, 1995
• Expiry date: Jun 24, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/03
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Silanes of the general formula ##STR1## are prepared wherein R.sup.1, R.sup.2 and R.sup.3 in the molecule are the same or different and represent aliphatic hydrocarbon groups, PA1 R.sup.4 is a divalent hydrocarbon group with 3 to 14 carbon atoms, PA1 R.sup.5 is a group having the formula --O(CH.sub.2).sub.b -- or a polyether group having the formula --(OC.sub.n H.sub.2n).sub.c --, wherein b has a value of 1 to 6, n has an average value of 2 to 2.5 and c has a value of 1 to 10, PA1 R.sup.6 is an --OSO.sub.3 X group or an --OR.sup.7 group, wherein X is a hydrogen, an alkali or an optionally substituted ammonium ion and R.sup.7 is an alkyl group with 1 to 4 carbon atoms or an acetyl group, PA1 a is 0 or 1, with the proviso that, when R.sup.6 represents the --OR.sup.7 group, a=1. The silanes are biologically degradable, resistant to hydrolysis and have pronounced surfactant properties.