Process for producing pitch-based carbon fiber

Details Process for producing pitch-based carbon fiber Process for producing pitch-based carbon fiber

1992-07-13

1994-05-03

Lewis, Michael

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234471, 208 39, D01F 912

Patent

active

053085990

ABSTRACT:
There is disclosed a process for producing pitch-based carbon fiber which comprises melt spinning an optically isotropic pitch or a mesophase pitch to form pitch fiber; subjecting the pitch fiber to liquid-phase oxidative polymerization in a solvent in the presence of an acid catalyst and a crosslinking agent to form infusibilized fiber; and carbonizing the infusiblized fiber. The above process enables low temperature and short time infusibilizing treatment of optically isotropic pitch fiber having a low softening point which has heretofore been difficult because of failure to preserve the original fibrous shape during infusibilization, and also efficient production of mesophase pitch-based carbon fibers as well as optically isotropic pitch-based carbon fibers each being improved in physical properties.

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