Process for producing pitch-based carbon fibers superior in comp

Details Process for producing pitch-based carbon fibers superior in comp Process for producing pitch-based carbon fibers superior in comp

1994-05-13

1995-11-28

Lewis, Michael

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

208 39, 208 44, 264 292, D01F 9145

Patent

active

054705584

ABSTRACT:
Pitch-based carbon fibers superior in compression characteristics are obtained by mixing a polycyclic aromatic compound and a hydrogen donating compound at a mole ratio of the latter to the former in the range of 0.1 to 10, polymerizing the resulting mixture at a temperature of 50.degree. to 400.degree. C. in the presence of a Lewis acid as catalyst, then removing the catalyst, thereafter heat-treating the resulting polymer to obtain a pitch containing 5-40% of anisotropic spheres of 5-60 .mu.m, having a total amount of aliphatic hydrogen of 25-50% and an amount of aliphatic hydrogen after .beta. of 5-25% and containing not more than 30% of oriented carbon based on a total amount of aromatic carbon, then spinning said pitch, then making the resulting pitch fiber infusible and subjecting the pitch fiber thus rendered infusible to a carbonization treatment.

REFERENCES:
patent: 4005183 (1977-01-01), Singer
patent: 4209500 (1980-06-01), Chwastiak
patent: 4620919 (1986-11-01), Uemura et al.
patent: 4986893 (1991-01-01), Seo et al.
H. F. Volk (1977) "High Modulus Pitch-Based Carbon Fibers", pp. 1-6. (no month).
Leonard S. Singer (1977) "The Mesophase and High Modulus Carbon Fibers from Pitch", pp. 408-415. (no month).

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