Method for the preparation of a low-impurity organopolysiloxane

Details Method for the preparation of a low-impurity organopolysiloxane Method for the preparation of a low-impurity organopolysiloxane

1984-08-16

1986-01-07

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 18, 528 33, 556462, C08G 7706

Patent

active

045635137

ABSTRACT:
The invention provides a novel method for the neutralization of the residual alkali catalyst following alkali-catalyzed polymerization of an organopolysiloxane oligomer to produce a high-polymeric organopolysiloxane, according to which the organopolysiloxane after completion of the polymerization reaction is admixed with a trihydrocarbyl monohalosilane, e.g. trimethyl chlorosilane, and a hexahydrocarbyl disilazane, e.g. hexamethyl disilazane, in combination as the neutralizing agent so that the neutralization is very complete and still the product organopolysiloxane contains very little impurities of alkali and halogen.

REFERENCES:
patent: 3057821 (1962-10-01), Boot
patent: 3065203 (1962-11-01), Bruner

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