IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0083119
(1987-08-10)
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발명자
/ 주소 |
- Chandra Grish (Midland MI) Zank Gregg A. (Midland MI)
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출원인 / 주소 |
- Dow Corning Corporation (Midland MI 02)
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인용정보 |
피인용 횟수 :
5 인용 특허 :
0 |
초록
▼
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 bypro
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.
대표청구항
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A method of preparing a halogen-containing metallopolysilane, which method comprises treating a mixture containing 90 to 99.9 weight percent organohalogendisilanes and 0.1 to 10 weight percent reactive metal compound, where the reactive metal compound contains a metal M selected from the group consi
A method of preparing a halogen-containing metallopolysilane, which method comprises treating a mixture containing 90 to 99.9 weight percent organohalogendisilanes and 0.1 to 10 weight percent reactive metal compound, where the reactive metal compound contains a metal M selected from the group consisting of aluminum, boron, chromium, lanthanum, molybdenum, neodymium, niobium, samarium, tantalum, titanium, tungsten, vanadium, yttrium, and zirconium, with 0.001 to 10 weight percent of a rearrangement catalyst at a temperature of 100°to 340°C. while distilling by-produced volatile materials until there is produced a halogen-containing metallopolysilane composed of [R2Si], [RSi], and [M]units where R is an alkyl radical containing 1 to 4 carbon atoms and M is a metal selected from the group consisting of aluminum, boron, chromium, lanthanum, molybdenum, neodymium, niobium, samarium, tantalum, titanium, tungsten, vanadium, yttrium, and zirconium, where the halogen-containing metallopolysilane contains 0 to 59.9 mole percent of [R2Si]units, 40 to 99.9 mole percent of [RSi] units, and 0.1 to 10 mole percent of [M]units, and where the other bonds on silicon are attached to other silicon atoms and halogen atoms.
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