Starting pitches for carbon fibers
US4440624A · kind A · utility
1Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Oct 20, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A starting pitch for carbon fibers, obtained by mixing (1) a heavy fraction oil boiling at not lower than 200.degree. C. obtained at the time of steam cracking of petroleum with (2) wax and then heat treating the resulting mixture at a specified temperature and pressure thereby to obtain the starting pitch, the thus obtained starting pitch being heat treated to produce a precursor pitch which is melt spun, infusibilized, carbonized or graphitized to obtain the carbon fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.