Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1991-05-20
1991-12-24
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
556452, 556456, C07F 708
Patent
active
050754793
ABSTRACT:
The instant invention is a one-step process for producing polydiorganosiloxanes (siloxanes). In the described process, a mixture comprising diorganodichlorosilane and a source of triorganosilyl groups is contacted with excess water essentially saturated with hydrogen chloride. Product siloxanes are isolated as well as saturated aqueous hydrogen chloride and anhydrous hydrogen chloride. The amount of triorganosilyl groups present in the mixture is controlled to set the degree of polymerization of product siloxanes. The isolated saturated aqueous hydrogen chloride is recycled to the process. Excess chloride generated in the process is collected as anhydrous hydrogen chloride.
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Bokerman Gary N.
Freeburne Steven K.
Schuelke Lawrence M.
VanKoevering Dennis G.
Boley William F.
Dow Corning Corporation
Shaver Paul F.
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