Aqueous catalytic process for the preparation of thiocarboxylate silane
AssigneeMomentive Performance Materials Inc.
InventorTiberiu Simandan
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Abstract
An aqueous process is described in which thiocarboxylate silane is produced from haloalkyl silane by reaction of the haloalkyl silane with an aqueous solution of thiocarboxylate salt in the presence of a catalytically effective amount of alkylguanidinium salt.
Claims20
A process for the preparation of thiocarboxylate silane which comprises reacting an aqueous solution of salt of thiocarboxylic acid with a haloalkyl silane in the presence of a catalytically effective amount of alkylguanidinium salt phase transfer catalyst to provide thiocarboxylate silane.
The process of claim 17 wherein the alkylguanidinium salt is at least one member selected from the group consisting of hexaethylguanidinium bromide, tetramethyldibutylguanidinium bromide, hexabutylguanidinium chloride, tetraethylpiperidinylguanidinium chloride, tris-piperidinylguanidinium chloride, trispyrrolidinyl bromide and mixtures thereof.
A process for the preparation of an aqueous solution of a salt of a thiocarboxylic acid which comprises reacting an aqueous solution of a sulfide and/or hydrosulfide with an acid halide and/or acid anhydride in the presence of alkylguanidinium salt to provide the aqueous solution of thiocarboxylic acid salt.
Dependencies are inferred from the claim text.