Process for preparing cyclic dimethylpolysiloxanes

Details Process for preparing cyclic dimethylpolysiloxanes Process for preparing cyclic dimethylpolysiloxanes

1979-07-11

1981-06-30

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

C07F 708

Patent

active

042764254

ABSTRACT:
Cyclic dimethylpolysiloxanes are prepared by heating a mixture containing linear or branched organopolysiloxanes consisting of at least 50 mol percent dimethylsiloxane units and aqueous sulfuric acid in which the aqueous sulfuric acid contains from 50 to 85 percent by weight of sulfuric acid, while simultaneously recovering the cyclic dimethylpolysiloxanes thus formed.

REFERENCES:
Noll, "Chemistry and Technology of Silicones," Academic Press, New York, (1968), p. 235.

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