Starting pitches for carbon fibers
US4460557A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1982 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Nov 15, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/15
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for the production of carbon fibers comprising heat treating a starting material, melt spinning the resulting precursor pitch, infusibilizing the pitch fibers and carbonizing or graphitizing the infusibilized pitch fibers, characterized in that the starting pitch is obtained by heat treating coal tar and/or coal liquefaction pitch at a specific temperature and a specific hydrogen pressure or by mixing coal tar and/or coal liquefaction tar with at least one nucleus-hydrogenated hydrocarbon of 2-3 rings in a specific mixing ratio and then heat treating the resulting mixture at a specific temperature and a specific pressure. In one embodiment, this invention relates to the starting pitch and carbon fibers obtained by said process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.