Process for the preparation of preceramic...

Details Process for the preparation of preceramic... Process for the preparation of preceramic...

C - Chemistry, Metallurgy

07

F

260/425, 260/446

C07F 7/02 (2006.01) C04B 35/571 (2006.01) C07F 7/28 (2006.01) C08G 77/60 (2006.01)

Patent

CA 1309102

PROCESS FOR THE PREPARATION OF PRECERAMIC METALLOPOLYSILANES AND THE POLYMERS THEREFROM ABSTRACT A process for the preparation of preceramic metallopolysilanes is described. The process consists of contacting and reacting organohalogendisilanes with metal containing compounds in the presence of a redistribution catalyst in an inert, essentially anhydrous atmosphere while removing volatile byproducts. The resulting metallopolysilanes contain significant amounts of aluminum, boron, chromium, lanthanum, molybdenum, neodymium, niobium, samarium, tantalum, titanium, tungsten, vanadium, yttrium, or zirconium. Such metallopolysilanes can be prepared with relatively low oxygen levels. These polymers are useful as chemical intermediates to synthesize organosilicon materials or polymers. These polymers are also useful, when fired at high temperatures, to form ceramic materials.

572921

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