Process for the preparation of linear and branched chlorosiloxan

Details Process for the preparation of linear and branched chlorosiloxan Process for the preparation of linear and branched chlorosiloxan

1975-10-30

1978-02-14

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 708

Patent

active

040738019

ABSTRACT:
A chlorosilane or partial hydrolysis product thereof is reacted with a siloxane and stable polymeric products of comparatively high molecular weight or high chlorine content are produced by effecting the reaction in the presence of a siloxane protonic acid equilibration catalyst in combination with a hydrogen halide acid. The hydrogen halide acid may be produced in situ. Representative protic acid equilibration catalysts include sulfuric acid, oleum, polysulfuric acids, sulfonic acids including aromatic, alkyl and perfluoroalkyl sulfonic acids, and polysulfonic acids.

REFERENCES:
patent: 2421653 (1947-06-01), Sauer
patent: 3642851 (1972-02-01), Bennett
patent: 3646090 (1972-02-01), Bennett
Noll, "Chemistry and Technology of Silicones", Academic Press, N. Y. (1968), pp. 220 and 221.

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