PROCESS FOR THE PREPARATION OF SILANES

A process for the preparation of a silane of the formula RaSiHb(OR')4-(a+b) wherein R is optionally substituted alkyl, alkenyl or aryl with up to 7 C atoms, R' is alkyl with 1 to 4 C atoms, a and b each independently is 1, 2 or 3, and a+b is at most 4, comprising reacting an Si-H polysilox...

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Bibliographische Detailangaben
Hauptverfasser:	SCHLAK, OTTFRIED, MORETTO, HANS-HEINRICH
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for the preparation of a silane of the formula RaSiHb(OR')4-(a+b) wherein R is optionally substituted alkyl, alkenyl or aryl with up to 7 C atoms, R' is alkyl with 1 to 4 C atoms, a and b each independently is 1, 2 or 3, and a+b is at most 4, comprising reacting an Si-H polysiloxane with a compound of the formula RaSi(OR')4-a in the presence of a conventional redox-stable siloxane polymerization catalyst which favors the exchange reaction. Advantageously the catalyst is AlCl3 and R and R' are methyl, ethyl, vinyl or phenyl.