OCTAPHENYLCYCLOTETRASILOXANE AND SIM-TETRAMETHYLTERAPHENYLCYCLOTETRASILOXANE PRODUCTION PROCESS Russian patent published in 2003 - IPC

Abstract RU 2201934 C2

FIELD: industrial organic synthesis. SUBSTANCE: octaphenylcyclotetrasiloxane and sim-tetramethylteraphenylcyclotetrasiloxane are prepared by hydrolysis of dialcoxydiphenylsilanes or dialcoxymethylphenylsilanes in presence of base in solvent or solvent mixture, wherein dialcoxydiphenylsilanes or dialcoxymethylphenylsilanes are soluble but wherein octaphenylcyclotetrasiloxane and sim- tetramethylteraphenylcyclotetrasiloxane are hard-soluble or insoluble. EFFECT: increased yield and improved purity of product. 21 cl, 2 ex

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RU 2 201 934 C2

Authors

Razzano Dzhon S.

Dates

2003-04-10—Published

1998-04-01—Filed