Process for the preparation of organosilicon compounds

Details Process for the preparation of organosilicon compounds Process for the preparation of organosilicon compounds

2006-08-02

2008-05-13

Barts, Samuel A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

Reexamination Certificate

active

07371881

ABSTRACT:
A process for the preparation of an organosilicon compound of the formula (I)in-line-formulae description="In-line Formulae" end="lead"?(R1R2R3SiR4)2Sx  (I)in-line-formulae description="In-line Formulae" end="tail"?by reacting haloalkoxysilanes of the general formula (II)in-line-formulae description="In-line Formulae" end="lead"?R1R2R3SiR4X  (II)in-line-formulae description="In-line Formulae" end="tail"?with a dry polysulphide of the general formula (III)in-line-formulae description="In-line Formulae" end="lead"?M2Sz  (III)in-line-formulae description="In-line Formulae" end="tail"?and/or dry sulphide of the general formula IVin-line-formulae description="In-line Formulae" end="lead"?M2S  (IV)in-line-formulae description="In-line Formulae" end="tail"?and optionally sulphur in an organic solvent, the organic solvent being removed from the resulting suspension, the mixture containing the organosilicon compound of the general formula (I) and the solid MX being mixed with water containing at least one buffer, and the resulting phases being separated.

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