Sterically hindered alkoxy cluster trisiloxanols

C - Chemistry – Metallurgy – 07 – F

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260/443.7

C07F 7/18 (2006.01) C07F 7/04 (2006.01)

Patent

CA 1069916

ABSTRACT OF THE DISCLOSURE Novel alkoxysilanol cluster compounds are described having the for- mula RSi[OSi(OR')3]2OH wherein R is hydrogen, an alkyl, alkenyl, aryl or aralkyl group and each R' is independently selected from the same group as R with the proviso that at least a majority of R' radicals are steri- cally hindered alkyl groups having at least 3 carbon atoms. The prepara- tion of these novel alkoxysilanol cluster compounds is also described. These novel compounds are useful as heat transfer fluids, hydraulic fluids, brake fluids or transmission fluids.

258716

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