METHOD FOR PREPARING MIXTURES OF ORGANOSILICON OLIGOSULFANES WITH HIGH CONTENT OF ORGANOSILICON DISULFANES Russian patent published in 2003 - IPC

FIELD: organosilicon compounds, chemical technology. SUBSTANCE: invention describes method for preparing mixtures of organosilicon oligosulfanes with high content of disulfanes of the general formula: Z-Alk-S_x-Alk-Z wherein Z represent groups: wherein R¹ means linear or branched alkyl group with 1-6 carbon atoms, cycloalkyl residue with 5-8 carbon atoms, benzyl residue or phenyl residue optionally substituted with methyl, ethyl or chlorine atom; R² represents alkoxy-group with linear or branched carbon chain with 1-6 carbon atoms or cycloalkoxy-group with 5-8 carbon atoms, phenoxy-group or benzyloxy-group being R¹ and R² can have identical or different values, respectively; Alk represents preferably bivalent saturated linear or branched hydrocarbon residue with 1- 10 carbon atoms, methylene preferably, and also ethylene, isopropylene, n-propylene, isobutylene or n- butylene preferably, and values n-pentylene, 2-methylbutylene, 3-methylbutylene, n-pentylene, 1,3- dimethylpropylene and 2,3-dimethylpropylene are preferably in similar degree but n-propylene is preferable especially, or the group: wherein n = 1-4; x = 1.5-3.0. Compounds are synthesized by interaction of highly dispersed sodium and sulfur in a single organic solvent followed by interaction of formed Na₂S_x with halogenalkylalkoxysilane to yield the required end product. Invention provides the development of method for preparing organosilicon disulfanes based on preparing separate elements as components of Na₂S_x. EFFECT: improved preparing method. 4 cl, 2 ex _