Organosilicon compounds containing s-alkylthiosulfate groups, processes for their preparation and use of the same
AssigneeWacker Chemie AG
InventorsRudolf Hager, Bernward Deubzer
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Abstract
Organosilicon compounds which contain Bunte salt groups and contain units of the general formula ##STR1## wherein R is a hydrogen atom or a monovalent organic radical, R.sup.1 is a hydrogen atom or a monovalent organic radical, R.sup.2 is a radical --QS.sub.2 O.sub.3 M, where Q is a divalent hydrocarbon radical and M is an alkali metal radical or optionally a substituted ammonium radical, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3, and c is 0, 1, 2 or 3, processes for preparing the organosilicon compounds and their use are described.
Claims10
An organosilicon compound which contains Bunte salt groups and contains units of the general formula
- wherein R is a hydrogen atom or a monovalent organic radical, R.sup.1 is a hydrogen atom or a monovalent organic radical, R.sup.2 is a radical --QS.sub.2 O.sub.3 M, where Q is a divalent hydrocarbon radical and M is an alkali metal radical or optionally a substituted ammonium radical, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3, and c is 0, 1, 2 or 3 with the proviso that the organosilicon compound contains at least one radical R.sup.2 and the sum of a, b and c is less than or equal to 3.
A process for preparing an organosilicon compound which contains Bunte salt groups, which comprises reacting at least one silane of the general formula
- R.sup.3.sub.d R.sup.5.sub.e Si(OR.sup.4).sub.4-d-e (II)
- and/or a partial hydrolysate thereof, in which R.sup.3 is a hydrogen atom or a monovalent organic radical, R.sup.4 is a hydrogen atom or a monovalent organic radical, R.sup.5 is the radical --Q'Y, where Q' is a divalent organic radical and Y is a halogen atom, d is 0, 1 or 2, and e is 1, 2 or 3, with the proviso that the sum of d and e is less than or equal to 3, and if appropriate at least one silane of the formula
- R.sup.6.sub.f Si(OR.sup.7).sub.4-f (III)
- and/or a partial hydrolysate thereof, in which R.sup.6 is a hydrogen atom or a monovalent organic radical, R.sup.7 is a hydrogen atom or a monovalent organic radical and f is 0, 1, 2 or 3, with at least one thiosulfuric acid salt and water.
A process for preparing a mercapto-functional organosilicon compound, which comprises reacting an organosilicon compound containing Bunte salt groups in the presence of water and an acid.
Dependencies are inferred from the claim text.