Process for the manufacture of carbon fibers and feedstock there

Details Process for the manufacture of carbon fibers and feedstock there Process for the manufacture of carbon fibers and feedstock there

1985-01-22

1987-06-09

Pal, Asok

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 40, 208 41, D01F 912, C10C 302

Patent

active

046718648

ABSTRACT:
Disclosed herein is an improved pitch for making readily stabilizable, substantially nonmesophasic carbon fibers. The pitch has a softening point of about 250.degree. C.(480.degree. F.) or above and is produced from an unoxidized thermal petroleum pitch by selectively reducing or eliminating a portion of the low molecular weight materials in a very short period of time so that the tendency to produce mesophase pitch is eliminated or reduced and so that the chemical integrity of the components of the higher molecular weight fractions is preserved as much as possible. Also disclosed is a method of producing carbon fibers therefrom and rovings or mats from such fibers.

REFERENCES:
patent: 2768119 (1956-10-01), Nash
patent: 3702054 (1972-11-01), Araki et al.
patent: 4243512 (1981-01-01), Seo
patent: 4271006 (1981-06-01), Dickakian
patent: 4472265 (1984-09-01), Otani
patent: 4497789 (1985-02-01), Sawran et al.

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