Method for preparing organofunctional polysiloxanes

The present invention is for crosslinked organofunctional polysiloxane and organofunctional cyclosiloxane compositions and a process for their preparation. The process for preparation of these siloxane compositions comprises contacting a mixture comprising a poly(organohydrogen)siloxane or a cyclo(o...

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Bibliographic Details
Main Author DURFEE, LOREN DEAN
Format Patent
LanguageEnglish
French
German
Published 01.12.1993
Edition5
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:The present invention is for crosslinked organofunctional polysiloxane and organofunctional cyclosiloxane compositions and a process for their preparation. The process for preparation of these siloxane compositions comprises contacting a mixture comprising a poly(organohydrogen)siloxane or a cyclo(organohydrogen)siloxane, an alpha,omega-triene and a triorganosilyl source with a platinum catalyst, at a temperature within a range of 50 DEG C. to 200 DEG C. The products of this process are crosslinked organofunctional polysiloxanes and crosslinked organofunctional cyclosiloxanes. The triorganosilyl source added to the process provides for control of the amount of crosslinking of the organofunctional polysiloxanes and cyclosiloxanes independent of the level of organofunctionality.
Bibliography:Application Number: EP19930303961