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AssigneeOSi Specialties, Inc.
InventorsThomas E. Childress, James S. Ritscher, Curtis L. Schilling, Jr., Okey G. Tucker, Jr., Donald G. Beddow
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Sulfur-containing organosilicon compounds useful as coupling agents in vulcanizable rubbers to enhance various properties, including low rolling resistance for automobile tires, are prepared. Preferred compounds include .OMEGA.,.OMEGA.'-bis (trialkoxysilylalkyl) polysulfides. The compounds are prepared by reacting sodium ethoxylate with hydrogen sulfide gas to yield a sodium sulfide solution, and then reacting this product with a slurried mixture of elemental sulfur and chloropropyltriethoxysilane to form the compound 3,3'-bis (triethoxysilylpropyl) tetrasulfide. The use of hydrogen sulfide gas and sodium metal alcoholates provides an efficient and economical process.
A process for the preparation of silane polysulfides comprising:
A process for the preparation of (C.sub.2 H.sub.5 O).sub.3 Si(CH.sub.2).sub.3 --S.sub.4 --(CH.sub.2).sub.3 Si(OC.sub.2 H.sub.5).sub.3, comprising:
A process for the preparation of (C.sub.2 H.sub.5 O).sub.3 Si(CH.sub.2).sub.3 --S.sub.4 --(CH.sub.2).sub.3 Si(OC.sub.2 H.sub.5).sub.3, comprising reacting sodium ethoxylate with hydrogen sulfide gas to yield a product and then reacting said product with a slurried mixture of elemental sulfur and Cl(CH.sub.2).sub.3 Si(C.sub.2 H.sub.5 O).sub.3.
Dependencies are inferred from the claim text.