Process for the production of organyloxy end-terminated polysilo

Details Process for the production of organyloxy end-terminated polysilo Process for the production of organyloxy end-terminated polysilo

1993-03-01

1994-05-10

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 23, 528 34, 556467, 556469, C08G 7706

Patent

active

053108442

ABSTRACT:
In the production of a triorganylsily or organodiorganylsilyl end-terminated poly-(diorganosiloxane) by reacting an .alpha.,.omega.-dihydroxypoly(diorganosiloxane) with a tetraorganyloxysilane or organotriorganyloxysilane in the presence of at least one alkali hydroxide, alkali alkoxide or alkali silanolate as a catalyst, the improvement which comprises effecting the reaction also in the presence of additionally at least one alkali metal salt which is soluble in the reactive system.

REFERENCES:
patent: 4395526 (1983-07-01), White et al.
patent: 4705826 (1987-11-01), Weber et al.
patent: 4748166 (1988-05-01), Gautier et al.
patent: 4897459 (1990-01-01), Evans
patent: 5196497 (1993-03-01), Weber et al.
B. V. Molchanov, et al., "Alkoxysiloxanes", Chemical Abstracts, vol. 89, Columbus, Ohio (1978).

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