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

US5430167A · 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## 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 PA2 b has a value of 1 to 6, PA2 n has an average value of 2 to 2.5 PA2 c has a value of 1 to 10, and PA1 a is 0 or 1, which fulfill the condition that they lower the surface tension of a 1% by weight aqueous solution to a value of .ltoreq.25 mN/m at 25.degree. C., measured with a Du Nooy tensiometer. The silanes are biologically degradable, resistant to hydrolysis and have pronounced surface active properties.