US3912832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant coated carbon articles
Assignee: Toyobo Co Ltd
•
Filing: 1973-03-15
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Granted: 1975-10-14
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Expires: 1993-03-15
Abstract
Abstract A carbon article, such as a fiber, tape or film, is coated, by vapor deposition, with a pyrolysis product containing carbon and phosphorus and is then treated by heating at a temperature above the pryolysis temperature. The carbon source and the phosphorus source may be a single vaporizable compound or may be a mixture of phosphorus-containing vapors and carbon-containing vapors. The preferred carbon source is a polycyclic compound having two or more condensed rings.
Inventors
- 👤 Tadashi Araki
- 👤 Kiro Asano
- 👤 Junichi Kosugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:59
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/46; B25B13/461; B25B13/462; F; F16; F16D; F16D41/00; F16D41/06; F16D41/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A PROCESS FOR PRODUCING A PHOSPHORUS-CONTAINING CARBON COATING ON A CARBON SUBSTRATE COMPRISING: VAPORIZING A PHOSPHORUS-CONTAINING ORGANIC COMPOUND OR A MIXTURE OF A PHOSPHOROUS COMPOUND AND AN ORGANIC COMPOUND, SAID ORGANIC OR PHOSPHORUS-CONTAINING ORGANIC COMPOUND CAPABLE OF UNDERGOING VAPOR PHASE PYROLYSIS TO FORM A FIRST ATMOSPHERE, HEATING THE SUBSTRATE IN SAID FIRST ATMOSPHERE TO A FIRST TEMPERATURE OF 600* TO 1,500*C SO AS TO EFFECT VAPOR PHASE PYROLYSIS OF SAID ORGANIC COMPOUND OR PHOSPHORUS-CONTAINING ORGANIC COMPOUND, THEREBY FORMING A CARBON COATING ON SAID SUBSTRATE CONTAINING 1-20% BY WEIGHT OF PHOSPHORUS, AND HEATING SAID COATED CARBON ARTICLE IN A SECOND NONOXIDIZING ATMOSPHERE AT A SECOND TEMPERATURE OF 1,500* TO 2,000*C FOR 0.2 SECONDS TO 30 MINUTES, SAID SECOND TEMPERATURE BEING HIGHER THAN SAID FIRST TEMPERATURE.
Claim 2
Dependent Claim
124 words
A PROCESS FOR PRODUCING A PHOSPHORUS-CONTAINING CARBON COATING ON A CARBON SUBSTRATE COMPRISING: VAPORIZING A PHOSPHORUS-CONTAINING ORGANIC COMPOUND OR A MIXTURE OF A PHOSPHOROUS COMPOUND AND AN ORGANIC COMPOUND, SAID ORGANIC OR PHOSPHORUS-CONTAINING ORGANIC COMPOUND CAPABLE OF UNDERGOING VAPOR PHASE PYROLYSIS TO FORM A FIRST ATMOSPHERE, HEATING THE SUBSTRATE IN SAID FIRST ATMOSPHERE TO A FIRST TEMPERATURE OF 600* TO 1,500*C SO AS TO EFFECT VAPOR PHASE PYROLYSIS OF SAID ORGANIC COMPOUND OR PHOSPHORUS-CONTAINING ORGANIC COMPOUND, THEREBY FORMING A CARBON COATING ON SAID SUBSTRATE CONTAINING 1-20% BY WEIGHT OF PHOSPHORUS, AND HEATING SAID COATED CARBON ARTICLE IN A SECOND NONOXIDIZING ATMOSPHERE AT A SECOND TEMPERATURE OF 1,500* TO 2,000*C FOR 0.2 SECONDS TO 30 MINUTES, SAID SECOND TEMPERATURE BEING HIGHER THAN SAID FIRST TEMPERATURE.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein said organic compound has at least two condensed aromatic rings and a vapor pressure higher than 5 mm Hg at 490*C.
Claim 4
Dependent Claim
9 words
The product formed by the process of claim 1.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein the carbon substrate is in the form of a tape, film or fiber.
Claim 6
Dependent Claim
19 words
The process of claim 1, wherein said heating at a temperature of 1,500* to 2,000*C is effected by direct-heating.
Claim 7
Dependent Claim
19 words
The process of claim 1, wherein said heating at a temperature of 1,500* to 2,000*C is effected by indirect-heating.
Claim 8
Dependent Claim
106 words
A process for the production of a phosphorus-containing carbon coating on a carbon substrate comprising: vaporizing a polycyclic phosphorus-containing compound or a mixture of phosporus or a phosphorous compound and a polycyclic organic compound to form a first atmospher; heating the substrate to a first temperature of 600*-1500*C in said first atmosphere to effect pyrolysis of said organic compound or phosphorus-containing compound coming into contact with the substrate, thereby forming a coated carbon article; and heating said coated carbon article in a non-oxidizing second atmosphere at a second temperature of 1500*-2000*C for 0.2 seconds to 30 minutes, said second temperature being higher than said first temperature.
Claim 9
Dependent Claim
106 words
A process for the production of a phosphorus-containing carbon coating on a carbon substrate comprising: vaporizing a polycyclic phosphorus-containing compound or a mixture of phosporus or a phosphorous compound and a polycyclic organic compound to form a first atmospher; heating the substrate to a first temperature of 600*-1500*C in said first atmosphere to effect pyrolysis of said organic compound or phosphorus-containing compound coming into contact with the substrate, thereby forming a coated carbon article; and heating said coated carbon article in a non-oxidizing second atmosphere at a second temperature of 1500*-2000*C for 0.2 seconds to 30 minutes, said second temperature being higher than said first temperature.
Claim 10
Dependent Claim
33 words
The process of claim 7 wherein said polycyclic organic compound is selected from naphthalene, tetralin, decalin, indene, indane, acenaphthene, fluorene, anthracene, phenanthrene, pyrene, naphthacene, chrysene, triphenylene, perylene, alkyl derivatives thereof and mixtures thereof.
Claim 11
Dependent Claim
16 words
The process of claim 7 wherein said polycyclic phosphorus-containing compound is selected from triphenylphosphine and triphenylphosphate.
Claim 12
Dependent Claim
17 words
The process of claim 7 wherein said vapor is diluted with an inert gas prior to pyrolysis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |