| (19) |
 |
|
(11) |
EP 0 014 161 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
17.09.1980 Bulletin 1980/19 |
| (43) |
Date of publication A2: |
|
06.08.1980 Bulletin 1980/16 |
| (22) |
Date of filing: 28.01.1980 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
29.01.1979 US 7321
29.01.1979 US 7322
|
| (71) |
Applicant: UNION CARBIDE CORPORATION |
|
() |
|
| (72) |
Inventors: |
|
- Barr, John Baldwin
()
- White III, Nicholas Francis
()
|
|
| |
|
| (54) |
Method of treating a multifilament bundle of pitch fibers and a spin size composition
therefor |
(57) A multifilament bundle of pitch fibers is treated with a dispersion of graphite or
carbon black in water in which is dissolved a water-soluble oxidizing agent and a
water-soluble surfactant.