Process for the preparation of preceramic metallopolysilanes and

Details Process for the preparation of preceramic metallopolysilanes and Process for the preparation of preceramic metallopolysilanes and

1987-08-10

1988-08-09

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 9, 528 10, 528 25, 528 20, 528 21, 528 22, 525477, C08F28300

Patent

active

047628952

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.

REFERENCES:
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patent: 4482689 (1984-11-01), Haluska
patent: 4537942 (1985-08-01), Brown-Wensley et al.

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