Starting pitch for carbon fibers
US4579645A · kind A · utility
4Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1983 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Apr 12, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided is a starting pitch for producing carbon fiber by heat-treating the starting pitch to obtain a precursor pitch, melt-spinning the precursor pitch, then rendering the resultant pitch fiber infusible, followed by carbonization, and further followed by graphitization if required, the starting pitch comprising a mixture of (a) 100 parts by weight of a pitch and (b) 5 to 500 parts by weight of a methanol-insoluble and benzene-soluble component contained in a heavy oil obtained in a fluid catalytic cracking of petroleum, the heavy oil having a boiling range not lower than 200.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.