Process for the preparation of organosilylalkylpolysulfanes

US6423859B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Alfred Alig · Pfalzgrafenweiler, DE
• Christoph Batz-Sohn · Hanau, DE
• Ulrich Deschler · Bad Neuenahr-Ahrweiler, DE
• Rudolf Michel · Alzenau, DE
• Jorg Munzenberg · Hanau, DE
• Raymund Sonnenschein · Frankfurt, DE
• Werner Will · Gelnhausen, DE
• Gerd Zezulka · Hanau, DE
• Karl-Heinz Rützel · Hürth, DE

Key dates

• Filing date: Jul 13, 2001
• Grant date: Jul 23, 2002
• Expiry date: Jul 13, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/1892
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2Sx (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.