Process for the production of mercaptoalkylalkoxysilanes

Details Process for the production of mercaptoalkylalkoxysilanes Process for the production of mercaptoalkylalkoxysilanes

2006-12-19

2006-12-19

Barts, Samuel (Department: 1621)

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

Organic compounds

Silicon containing

C556S427000

Reexamination Certificate

active

07151188

ABSTRACT:
Mercaptoalkylalkoxysilane is obtained by reacting at least one sulfide of the general formulain-line-formulae description="In-line Formulae" end="lead"?MHSin-line-formulae description="In-line Formulae" end="tail"?wherein M is an alkali metal or ammonium with a haloalkyl silane in an aqueous reaction medium in the presence of an acidic gas to maintain the pH of the reaction medium at or below about 10, and in the additional presence of alkylguanidinium salt phase transfer catalyst to provide mercaptoalkylalkoxysilane, the alkylguanidinium salt phase transfer catalyst being represented by the general formula:wherein each of R1-5is a primary alkyl radical and R6is a primary alkyl or bis(primary alkylene) radical, or at least one of the R1–R2, R3–R4and R5–R6combinations with the respective connecting nitrogen atom forms a heterocyclic radical; X is an anion; and n is 1 or 2.

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