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

US6489498B2 · kind B2 · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

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

Key dates

• Filing date: Mar 27, 2001
• Grant date: Dec 3, 2002
• Expiry date: Mar 27, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/081
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Silanes of the general formula are prepared, wherein R1, R2 and R3 in the molecule are the same or different and represent aliphatic or aromatic hydrocarbon groups, R4 is a divalent hydrocarbon group with 4 to 12 carbon atoms and a lateral hydroxyl group, wherein the hydrocarbon group can be interrupted by an ether oxygen, R5 is a hydrophilic, ionic group. A method for synthesizing these compounds is described. The silanes greatly lower the surface tension of aqueous solutions, the surface tension being reduced to values of about 23 mN/m. The silanes are biologically degradable and have pronounced surfactant properties.