Method of preparing alkylalkoxysilanes containing polysulfide bridges

US3946059A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Paul Adriaan Jan Janssen · Vosselaar, BE
• Klaus-Dieter Steffen · Hennef (Sieg), DE

Key dates

• Filing date: Dec 3, 1974
• Grant date: Mar 23, 1976
• Expiry date: Dec 3, 1994

Classification

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

Abstract

A process for preparing an alkylalkoxysilane containing polysulfide bridges which silane has the formula: EQU (RO).sub.3.sub.-m R.sub.m Si--Z--S.sub.2.sub.+x --Z--SiR.sub.m (OR).sub.3.sub.-m, wherein R represents identical or different linear or branched alkyl radicals having 1 to 6 carbon atoms or phenyl, Z represents linear or branched alkylene radicals having 1 to 8 carbon atoms, m is 0 to 3 and x is 1 to 4, which comprises contacting a bis-alkyl-alkoxysilyldisulfide of the formula: EQU (RO).sub.3.sub.-m R.sub.m Si--Z--S--S--Z--SiR.sub.m (OR).sub.3.sub.-m wherein R, Z and m have the previously assigned significance, with sulfur at a temperature between 100.degree. and 200.degree.C.