Pitch for production of carbon fibers

Details Pitch for production of carbon fibers Pitch for production of carbon fibers

1986-04-18

1987-06-02

Konopka, P. E.

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 44, 264 292, 4234474, 528247, 585 11, 585426, C10C 306, D01F 920

Patent

active

046701290

ABSTRACT:
A pitch having optical anisotropy for use in production of carbon fibers, wherein the pitch is prepared using a compound represented by the formula (I) as a raw starting material and subjecting the compound to thermal modification and then removing light fractions ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 each represents a hydrogen atom or a methyl group or an ethyl group; R.sub.5 represents a hydrogen atom or a methyl group; the total number of carbon atoms of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is from 2 to 4 and the total number of carbon atoms of R.sub.6, R.sub.7, R.sub.8 and R.sub.9 is from 2 to 4; and m is at least 3. The pitch is substantially homogeneous in quality, has a low softening point and has excellent molecular orientation.

REFERENCES:
patent: 2548982 (1951-04-01), Kemp
patent: 2597159 (1952-05-01), May et al.
patent: 2660572 (1953-11-01), Feasley
patent: 2957851 (1960-10-01), Fetterly
patent: 4032430 (1977-06-01), Lewis
patent: 4317809 (1982-03-01), Lewis et al.

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