CATALYZED REDISTRIBUTION OF POLYORGANOSILOXANES

The instant invention is a catalyzed process for the redistribution of linear, chloride or hydroxy end-terminated polyorganosiloxanes or cyclic polyorgano-siloxanes. Effective catalysts for the described process are alumina, silica-alumina, activated carbon, zeolite and acid clay. The catalyzed redi...

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Bibliographische Detailangaben
Hauptverfasser:	HALM, ROLAND L, VANKOEVERING, DENNIS G, FREEBURNE, STEVEN K, BOURGOIN, JODI A, NISWONGER, DAVID S, NAASZ, BRIAN, M
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The instant invention is a catalyzed process for the redistribution of linear, chloride or hydroxy end-terminated polyorganosiloxanes or cyclic polyorgano-siloxanes. Effective catalysts for the described process are alumina, silica-alumina, activated carbon, zeolite and acid clay. The catalyzed redistribution process can be incorporated as an element of a three-stage process. The three-stage process allows control of the yield of cyclic polyorganosiloxanes.