PROCESS FOR THE PREPARATION OF ORGANOPOLYSILOXANES CONTAINING SIH-BONDS

A method is disclosed for the synthesis of SiH-containing organopolysiloxanes from the corresponding Si-halogen-containing organopolysiloxanes by the reaction with metal hydrides in a liquid reaction medium. The method has the following combiniation of characteristics: (a) the use of a metal hydride...

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Bibliographic Details
Main Authors WEWERS, DIETMAR, KOERNER, GOTZ, WEITEMEYER, CHRISTIAN
Format Patent
LanguageEnglish
German
Published 21.09.1988
Edition4
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:A method is disclosed for the synthesis of SiH-containing organopolysiloxanes from the corresponding Si-halogen-containing organopolysiloxanes by the reaction with metal hydrides in a liquid reaction medium. The method has the following combiniation of characteristics: (a) the use of a metal hydride being LiH, NaH, KH, CaH2 or MgH2; (b) the use of ethers as reaction medium; (c) the continuous removal of the metal halide depositing on the surface of the metal hydride particles during the reaction by the action of mechanical energy or ultrasound with formation of a fresh surface. The reaction proceeds practically quantitatively and at low temperatures. It can be applied with particular advantage to industrially obtained mixtures of alpha , omega -dichloroorganopolysiloxanes.
Bibliography:Application Number: EP19870115398