Process for making silarylenesilanediol, silarylenesiloxanediol

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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260 465P, 2604482D, C08L 8300

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active

039594033

ABSTRACT:
A method is provided for making silarylenesilanediol, silarylenesiloxanediol and block copolymers of silarylenesiloxane and polydiorganosiloxane, useful as high-strength silicone rubber. Silarylenesiloxanediols can be prepared by heating an aqueous mixture of a dialkoxy silarylene and a water miscible organic solvent such as acetone, followed by distilling volatiles from the mixture. A mixture of the silarylenesilanediol or silarylenesiloxanediol, a silanol-terminated polydiorganosiloxane, organic solvent and a condensation catalyst can then be heated to effect removal of water of condensation to produce silarylenesiloxane block copolymer.

REFERENCES:
patent: 3338870 (1967-08-01), Nitzsche et al.
patent: 3350350 (1967-10-01), Nitzsche et al.

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