Process for preparing alkylpolyether-substituted mercaptosilanes

US7772349B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Manuel Friedel · Zürich, CH
• Susann Witzsche · Rheinfelden (Baden), DE

Key dates

• Filing date: May 28, 2008
• Grant date: Aug 10, 2010
• Expiry date: May 28, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/548
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for preparing alkylpolyether-substituted mercaptosilanes of the general formula I,(X)m(X′)n(X″)oSi(—R1—SR2)p  (I)and a Hazen colour number of ≦250 mg Pt—Co/L by reacting compounds of the general formula II,(X′)m+n(X″)oSi(—R1—SR2)p  (II)with m equivalents of the compounds of the general formula III,H—O—((CR32)w—O—)vAlk  (III)using a proton-donating co-catalyst and, if desired, a further catalyst, and separating off liberated X′—H from the reaction mixture.