Process for preparation of organopolysiloxanes

Details Process for preparation of organopolysiloxanes Process for preparation of organopolysiloxanes

1991-05-20

1992-07-14

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 33, C08G 7704

Patent

active

051303990

ABSTRACT:
The present process for producing an organopolysiloxane is characterized in that the polymerization of an organosiloxane by using an alkali catalyst is carried out in the presence of a reversible dehydrating agent such as magnesium sulfate and calcium carbonate or an irreversible dehydrating agent such as calcium oxide. According to this manufacturing process, there is a quite distinct mutual relation between the preset composition of the organopolysiloxane to be manufactured and the viscosity of the actually manufactured organopolysiloxane.

REFERENCES:
patent: 3946076 (1976-03-01), Paasen et al.
patent: 4308366 (1981-12-01), Millet
patent: 4356293 (1982-10-01), Deubzer et al.
patent: 4526954 (1985-07-01), Williams
patent: 4625011 (1986-11-01), Kosal et al.
patent: 4831265 (1989-05-01), Watanabe et al.
Noll, Walter, "Chemistry and Technology of Silicons" 1968, pp. 211-217, and 226-227.

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