Process for preparing precursor pitch for carbon fibers
US4575411A · kind A · utility
7Cited by
15References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1984 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Nov 21, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C3/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A precursor pitch for the production of carton fibers is obtained by heat-treating a carbonaceous pitch in the form of a thin film having a thickness not larger than 5 mm at a temperature in the range of 250.degree. to 390.degree. C. and under a reduced pressure not higher than 100 mmHg. By melt-spinning this precursor pitch and subjecting the resultant pitch fiber to infusiblization and carbonization and, if required, to subsequent graphitization, there is obtained a high quality carbon fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.