| (19) |
 |
|
(11) |
EP 0 154 175 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
03.05.1989 Bulletin 1989/18 |
| (43) |
Date of publication A2: |
|
11.09.1985 Bulletin 1985/37 |
| (22) |
Date of filing: 04.02.1985 |
|
| (51) |
International Patent Classification (IPC)4: D01F 9/22 |
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB SE |
| (30) |
Priority: |
07.03.1984 US 587100
|
| (71) |
Applicant: AMERICAN CYANAMID COMPANY |
|
Stamford
Connecticut 06904-0060 (US) |
|
| (72) |
Inventors: |
|
- McHenry, Edward Mallary
Milton
Florida 32570 (US)
- DeMaria, Francesco
Gulf Breeze
Florida 32561 (US)
|
| (74) |
Representative: Wächtershäuser, Günter, Prof. Dr. |
|
Patentanwalt,
Tal 29
80331 München
80331 München (DE) |
|
| |
|
| (54) |
Rapid stabilization process for carbon fiber precursors |
(57) Carbon fiber precursors are stabilized regarding their mechanical properties by conducting
the stabilization procedure in at least two steps, the first at a temperature at which
the maximum plasticity of the polymer is attained while stretching the fiber 10-50%
and the second at 200-300°C, but higher than the first.