Title: Method of preparing alkylalkoxysilanes containing polysulfide bridges

Abstract: A process for preparing an alkylalkoxysilane containing polysulfide bridges which silane has the formula: (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: (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.

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Inventors: Janssen, Paul (Bensberg-Refrath, DT)
Steffen, Klaus-Dieter (Troisdorf-Oberlar, DT)

Application Number: 529202
Filing Date: 1974-12-03
Publication_date: 1976-03-23
Assignee: Dynamit Nobel Aktiengesellschaft (Troisdorf, DT)
Primary Class(es): 556/428 556/429
Other Classes:
US Patent Ref:

3284466	Nov, 1966	Rosenthal	260/448.
3317461	May, 1967	Plueddemann	260/448.
3530160	Sep, 1970	Gardner et al.	260/448.
3768537	Oct, 1973	Hess et al.	260/448.
3842111	Oct, 1974	Meyer-Simon et al.	260/448.
3873489	Mar, 1975	Thurn et al.	260/448.

Other Refs:
Primary Examiner: Shaver, Paul F.
Assistant Examiner:
Attorney: Burgess, Dinklage & Sprung