Starting pitches for carbon fibers
US4397830A · kind A · utility
13Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1982 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Apr 9, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/322
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A starting pitch for carbon fibers, obtained by (A) 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) a hydrogenated oil selected from aromatic hydrocarbons of 2-10 rings in which the nuclei have been hydrogenated and specific fractions boiling at 160.degree.-650.degree. C. and containing such nuclei-hydrogenated hydrocarbons and then (B) heat treating the resulting mixed oil at 370.degree.-480.degree. C. and 2-50 Kg/cm.sup.2.G to obtain the starting pitch for carbon fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.