Patent ID: 6284907
Filing Date: 2001-09-04
Classification: C07F

Abstract:
A process for the preparation of 1,3-dihalo-1,1,3,3-tetra(organyl)disiloxanes of the general formulaXR.sub.2 Si--O--SiR.sub.2 X (1)by reacting hydrogen halide with the 1,3-dihydro-1,1,3,3-tetra(organyl)disiloxanes of the general formulaHR.sub.2 Si--O--SiR.sub.2 H (2),in whichR are identical or different C.sub.1-20 hydrocarbon radicals optionally substituted by fluorine or chlorine atoms, andX 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.