Production of diorganopolysiloxanes having silanol end groups

Details Production of diorganopolysiloxanes having silanol end groups Production of diorganopolysiloxanes having silanol end groups

1988-04-18

1990-10-02

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 7706

Patent

active

049608509

ABSTRACT:
Polydiorganosiloxanes having silanol end groups, well suited for the production of vulcanizable silicone compositions, are conveniently prepared by bulk polycondensing a polydiorganosiloxane oligomer having silanol end groups in a closed reaction zone in the presence of a catalytically effective amount of trifluoromethylsulfonic acid, at a temperature of from 20.degree. to 160.degree. C., while continuously removing water of polycondensation, and terminating the polycondensation reaction by adding a catalyst neutralizing amount of a cyclopolydiorganosilazane or a polydiorganosilazane having diorganoaminosilyl end groups to the medium of reaction.

REFERENCES:
patent: 3078255 (1963-02-01), Pike
patent: 3155634 (1964-11-01), Pike
patent: 4431771 (1984-02-01), Falender et al.
patent: 4448927 (1984-05-01), Falender et al.
patent: 4482670 (1984-11-01), Saam et al.
patent: 4563513 (1986-01-01), Inomata
patent: 4722987 (1988-02-01), Ikeno

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