Process for preparing polysulfide silanes

Details Process for preparing polysulfide silanes Process for preparing polysulfide silanes

1998-09-28

2000-01-18

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 34, 528373, 528388, 556427, C08G 7722

Patent

active

060158700

ABSTRACT:
Polysulfide silanes: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.x C.sub.3 H.sub.6 Si(OR).sub.3 are reacted with an anhydrous sulfur compound: M.sup.1.sub.2 S or M.sup.2 S and a halogenoalkoxysilane: XC.sub.3 H.sub.6 Si(OR).sub.3 to form polysulfide silanes: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.y C.sub.3 H.sub.6 Si(OR).sub.3 wherein R is methyl or ethyl, x is a positive number of 3 to 6 on the average, M.sup.1 is an alkali metal or ammonium, M.sup.2 is an alkaline earth metal or zinc, X is a halogen, and y is a positive number less than x on the average. Short chain polysulfide silanes can be prepared with the industrial advantages of safety, high yields and low cost.

REFERENCES:
patent: 4374943 (1983-02-01), Williams
patent: 5663395 (1997-09-01), Goebel et al.
patent: 5859275 (1999-01-01), Munzenberg et al.

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