Wacker-chemie Gmbh

Christa Trieschmann

Gerhard Preiner

Johann Muller

Walter Doskocil

Organo(poly)siloxanes having halogen bonded directly to silicon, or acetoxysiloxanes are prepared by reacting organo(poly)siloxanes having hydrogen bonded directly to silicon, with an allyl compound in the presence of metallic palladium, ruthenium or rhodium, or an acetylacetone or phosphine complex, or compound containing palladium, ruthenium or rhodium in which the allyl compound is an allyl halide having 3 carbon atoms per molecule or allyl acetate.

Method for preparing acetoxysiloxanes and organo(poly)siloxanes having

Organosilyl carbonates, such as bis(trimethylsilyl)carbonate, are prepared by reacting an organohalosilane with an alkali bicarbonate in the presence of an amine and/or a phosphine and an aprotic solvent, preferably a polar solvent which is inert to the reactants. The resultant mixture is separated from the ammonium halide and/or phosphonium halide and the organosilyl carbonate is recovered from the halide-free mixture.

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Burghausen, Germany

Christa Trieschmann