EP0030105A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polymetallocarbosilane, process for its production and shaped articles of inorganic carbide derived therefrom
Assignee: Ube Corp
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Filing: 1980-11-20
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Granted: —
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Expires: 2000-11-20
Abstract
Abstract A polymetallocarbosilane having a number average molecular weight of 700 to 100,000 is derived from (i) a polycarbosilane having a number average molecular weight of 200 to 10,000 and containing a main-chain skeleton composed mainly of units of the formula wherein R represents hydrogen, lower alkyl or phenyl, and (ii) an organometallic compound of the formula MX. wherein M represents Ti or Zr, and X represents alkoxy of 1 to 20 carbon atoms, phenoxy or acetyl-acetoxy, at least one of the silicon atoms of the polymetallocarbosilane being bonded to the metal atom (M) through an oxygen atom, and the ratio of the total number of the structural units+ Si-CH 2 )̵ to the total number of the structural units (̵ M-O )̵ in the polymetallocarbosilane being from 2:1 to 200:1. When molded and fired the polymetallocarbosilane can provide articles consisting mainly of SiC and MC having high mechanical strength and oxidation resistance.
Inventors
- 👤 Seishi Tohoku Daigaku Shukusha 4-2 Yajima
- 👤 Kiyohito Tohoku Daigaku Shukusha 2-2 Okamura
- 👤 Yoshio Hasegawa
- 👤 Takemi Yamamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C01; C01B; C01B32/00; C01B32/90; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C08G77/48; C08G77/58; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/54; C01P2002/70; C01P2002/72; C01P2002/80; C01P2002/82
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A polymetallocarbosilane containing structural units of the formula -(-Si-CH 2 )- and -(- M-O-)-, in which M represents Ti or Zr characterised by having a number average molecular weight of 700 to 100,000 and being derived from (i) a polycarbosilane having a number average molecular weight of 200 to 10,000 and a main-chain skeleton composed mainly of units of the formula wherein R represents a hydrogen atom, a lower (preferably C l -C 4 ) alkyl group or a phenyl group, and (ii) an organometallic compound of the formula wherein M represents Ti or Zr, and X represents an alkoxy group having 1 to 20 carbon atoms, a phenoxy group or an acetylacetoxy group, at least one of the silicon atoms of the polymetallocarbosilane being bonded to a metal atom (M) through an oxygen atom, and the ratio of the total number of structural units of the formula -(Si-CH 2 )- to the total number of the structural units of the formula (M-O) in the polymetallocarbosilane being from 2:1 to 200:1.
Claim 2
Dependent Claim
171 words
A polymetallocarbosilane containing structural units of the formula -(-Si-CH 2 )- and -(- M-O-)-, in which M represents Ti or Zr characterised by having a number average molecular weight of 700 to 100,000 and being derived from (i) a polycarbosilane having a number average molecular weight of 200 to 10,000 and a main-chain skeleton composed mainly of units of the formula wherein R represents a hydrogen atom, a lower (preferably C l -C 4 ) alkyl group or a phenyl group, and (ii) an organometallic compound of the formula wherein M represents Ti or Zr, and X represents an alkoxy group having 1 to 20 carbon atoms, a phenoxy group or an acetylacetoxy group, at least one of the silicon atoms of the polymetallocarbosilane being bonded to a metal atom (M) through an oxygen atom, and the ratio of the total number of structural units of the formula -(Si-CH 2 )- to the total number of the structural units of the formula (M-O) in the polymetallocarbosilane being from 2:1 to 200:1.
Claim 3
Dependent Claim
19 words
A polymetallocarbosilane according to claim 1 characterised in that it is a thermoplastic material melting at 50 to 400°C.
Claim 4
Dependent Claim
17 words
A polymetallocarbosilane according to claim 1 or 2 characterised in that it is soluble in organic solvents.
Claim 5
Dependent Claim
109 words
A process for producing a polymetallocarbosilane as claimed in claim 1, 2 or 3 characterised by mixing the polycarbosilane (i) with the organometallic compound (ii) in such proportions that the ratio of the total number of the structural units of-the formula (Si-CH 2 )- of the polycarbosilane (i) to the total number of the structural units of the formula -(M-O-) of the organometallic compound (ii) is_from 2:1 to 200:1, and heating the resulting mixture in an atmosphere intert to the reaction, thereby to bond at least one of the silicon atoms of the polycarbosilane (i) to a metallic atom (M) of the organometallic compound (ii) through an oxygen atom.
Claim 6
Dependent Claim
22 words
A process according to claim 4 characterised in that the heating is carried out at a temperature of not more than 500°C.
Claim 7
Dependent Claim
38 words
Shaped articles of an inorganic carbide consisting mainly of SiC and MC obtained by molding a polymetallocarbosilane as claimed in claim 1, 2 or 3 and firing the molded articles in a vacuum or inert or non-oxidising atmosphere.
References Cited (Backward Citations)
No citation records indexed.
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