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US4052430A
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Method for producing organosilicon high molecular weight compounds having silicon and carbon as main skeleton components and said organosilicon high molecular weight compounds
Assignee: Research Institute for Iron Steel and Other Metals of Tohoku University
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Filing: 1976-04-19
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Granted: 1977-10-04
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Expires: 1996-04-19
Abstract
Abstract Organosilicon high molecular weight compounds having silicon and carbon as the main skeleton components and consisting of a mixture of linear polycarbosilanes having silicon and carbon as the main skeleton components, cyclic polycarbosilanes having silicon and carbon as the main skeleton components and polycarbosilanes in which linear carbosilane and cyclic carbosilane are chemically bonded are produced by thermally decomposing and polycondensing at least one of organosilicon compound having polysilane skeleton selected from the group consisting of cyclic polysilanes shown by the following formula (R 1 .R 2 .Si)n, n≧4 wherein R 1 and R 2 are hydrogen, alkyl group, aryl group, silyl group, or a halogen and linear polysilane shown by the following formula ##STR1## WHEREIN R 1 , R 2 , R 3 and R 4 are hydrogen, alkyl group, aryl group, silyl group or a hologen, by heating at a temperature of 300°-2,000° C under at least one atmosphere of an inert gas and hydrogen gas or under a vacuum.
Inventors
- 👤 Seishi Yajima
- 👤 Josaburo Hayashi
- 👤 Mamoru Omori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:00
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01B32/977; C08; C08G; C08G77/00; C08G77/60; D; D01; D01F; D01F6/00; D01F6/96; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
A method for producing organosilicon high molecular weight compounds having silicon and carbon as the main skeleton components and consisting of a mixture of linear polycarbosilanes having silicon and carbon as the main skeleton components, cyclic polycarbosilanes having silicon and carbon as the main skeleton components and polycarbosilanes in which linear carbosilane and cyclic carbosilane are chemically bonded, which comprises thermally decomposing and polycondensing at least one of organosilicon compounds having polysilane skeleton selected from the group consisting of cyclic polysilanes shown by the following formula (R.sub.1.sup.. R.sub.2.sup.. Si)n, n ≧ 4 wherein R 1 and R 2 are hydrogen, alkyl group, aryl group, silyl group, or a halogen and linear polysilane shown by the following formula ##STR7## wherein R 1 , R 2 , R 3 and R 4 are hydrogen, alkyl group, aryl group, silyl group or a hologen, by heating at a temperature of 300°-2,000° C under at least 1 atmosphere of an inert gas and hydrogen gas or under a vacuum.
Claim 2
Independent Claim
165 words
A method for producing organosilicon high molecular weight compounds having silicon and carbon as the main skeleton components and consisting of a mixture of linear polycarbosilanes having silicon and carbon as the main skeleton components, cyclic polycarbosilanes having silicon and carbon as the main skeleton components and polycarbosilanes in which linear carbosilane and cyclic carbosilane are chemically bonded, which comprises thermally decomposing and polycondensing at least one of organosilicon compounds having polysilane skeleton selected from the group consisting of cyclic polysilanes shown by the following formula (R.sub.1.sup.. R.sub.2.sup.. Si)n, n ≧ 4 wherein R 1 and R 2 are hydrogen, alkyl group, aryl group, silyl group, or a halogen and linear polysilane shown by the following formula ##STR7## wherein R 1 , R 2 , R 3 and R 4 are hydrogen, alkyl group, aryl group, silyl group or a hologen, by heating at a temperature of 300°-2,000° C under at least 1 atmosphere of an inert gas and hydrogen gas or under a vacuum.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1, wherein less than 10% of a radical initiator is added to the starting organosilicon compound.
Claim 4
Dependent Claim
18 words
A method as claimed in claim 2, wherein said radical initiator is benzoyl peroxide, ditert.-butylperoxyoxalate, ditert.-butylperoxide or azoisobutyronitrile.
Claim 5
Dependent Claim
28 words
A method as claim in claim 1, wherein said thermal decomposition and polycondensation reaction is effected under pressure of 1-100 atmospheric pressure at a temperature of 300°-700° C.
Claim 6
Dependent Claim
60 words
The organosilicon high molecular weight amorphous compounds consisting of a mixture of linear polycarbosilanes having silicon and carbon as the main skeleton components, cyclic polycarbosilanes having silicon and carbon as the main skeleton components and polycarbosilanes in which linear carbosilane and cyclic carbosilane are chemically bonded, which have an average molecular weight of 300-50,000 and an intrinsic viscosity of 0.005-1.50.
Claim 7
Dependent Claim
60 words
The organosilicon high molecular weight amorphous compounds consisting of a mixture of linear polycarbosilanes having silicon and carbon as the main skeleton components, cyclic polycarbosilanes having silicon and carbon as the main skeleton components and polycarbosilanes in which linear carbosilane and cyclic carbosilane are chemically bonded, which have an average molecular weight of 300-50,000 and an intrinsic viscosity of 0.005-1.50.
References Cited (Backward Citations)
US2850514A
Cited
US3422039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |