Carbon fibers and process for preparing same

Details Carbon fibers and process for preparing same Carbon fibers and process for preparing same

1996-06-13

1997-11-25

Edwards, Newton

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428375, 428392, D02G 300, B32B 900

Patent

active

056910550

ABSTRACT:
Carbon fibers with a surface oxygen concentration (O/C ratio) of 0.20 or less as measured by X-ray photoelectron spectroscopy, a surface concentration of hydroxyl groups (C--OH/C ratio) of 0.5% or greater as measured by chemical modification X-ray photoelectron spectroscopy and a surface concentration of carboxylic groups (COOH/C ratio) of 2.0% or less as measured by chemical modification X-ray photoelectron spectroscopy, and an aliphatic compound applied as a sizing agent which has multiple epoxy groups or an aromatic compound which has multiple epoxy groups, the number of atoms between the epoxy groups and an aromatic ring being 6 or greater.

REFERENCES:
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patent: 3914504 (1975-10-01), Weldy
patent: 3957716 (1976-05-01), Weldy
patent: 4163003 (1979-07-01), Paul, Jr. et al.
patent: 4364993 (1982-12-01), Edelman et al.
patent: 4496671 (1985-01-01), Yoshinaga et al.
patent: 4600640 (1986-07-01), Olson
patent: 4814157 (1989-03-01), Uno et al.
patent: 4844781 (1989-07-01), Sanchez et al.
patent: 4867852 (1989-09-01), Nakao et al.
patent: 4880881 (1989-11-01), Minami
patent: 5124010 (1992-06-01), Nakao et al.

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