Process for preparing low-molecular-weight organo(poly)siloxanes

Details Process for preparing low-molecular-weight organo(poly)siloxanes Process for preparing low-molecular-weight organo(poly)siloxanes

1988-08-04

1990-08-14

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556413, 556424, 556425, 556440, 556451, 556453, 556457, C07F 708, C07F 710, C07F 718

Patent

active

049489070

ABSTRACT:
Linear low-molecular-weight organo(poly)siloxanes which are monofunctional or difunctional and in which, if difunctional, the two functionalities are present in siloxane units which are chemically different from each other are prepared by reacting an octaorganocyclotetrasiloxane with lithium silanolate in a molar ratio of 0.9:1 to 1.1:1 in an electron-donating, aprotic solvent at a temperature below 50.degree. C., in the absence of water, and thereafter reacting the resultant lithium siloxanolate thus obtained with an organohalosilane.

REFERENCES:
patent: 3337497 (1967-08-01), Bostich
patent: 3481965 (1969-12-01), Selin

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