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US 6,284,907 B1Granted
Process for the preparation of 1,3-dihalo-1,1,3,3-tetra(organyl) disiloxanes
AssigneeWacker Chemie AG
InventorsJörn Winterfeld, Bors C. Abele
Life of this patent
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Abstract
1,3-dihalo-1,1,3,3-tetra(organyl)disiloxanes of the general formula XR2Si—O—SiR2X (1) are prepared by reacting hydrogen halide with the corresponding 1,3-dihydro-1,1,3,3-tetra(organyl)disiloxanes of the general formula HR2Si—O—SiR2H (2), in which R is an alkyl or halogen substituted alkyl group and X is halogen, in the presence of a catalyst selected from transition metals of the 8th subgroup of the periodic table of the elements, or compounds or complexes of these transition metals.
Claims20
A process for the preparation of 1,3-dihalo-1,1,3,3-tetra(organyl)disiloxanes of the general formula
- XR2Si—O—SiR2X (1)
- by reacting hydrogen halide with the 1,3-dihydro-1,1,3,3-tetra(organyl)disiloxanes of the general formula
- HR2Si—O—SiR2H (2),
- in which
- R are identical or different C1-20 hydrocarbon radicals optionally substituted by fluorine or chlorine atoms, and
- X are identical or different and are each a halogen atom, in the presence of at least one catalyst selected from the group consisting of transition metals of the 8th subgroup of the periodic table of the elements, compounds of transition metals of said 8th subgroup, complexes of transition metals of said 8th subgroup, and mixtures thereof.
3 more elements
Dependencies are inferred from the claim text.