Optically anisotropic carbonaceous pitch

Details Optically anisotropic carbonaceous pitch Optically anisotropic carbonaceous pitch

1985-09-03

1987-04-07

Metz, Andrew H.

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 44, 4234472, C01C 300, D01F 912, D01F 920

Patent

active

046559027

ABSTRACT:
In a process for producing an optically anisotropic carbonaceous pitch having a low softening point for the production of carbon material starting oil to be used is a tar-like substance which is a mixture of compounds not substantially containing chloroform insolubles but containing components having a boiling point of 540.degree. C. or more as principal components and consisting principally of carbon and hydrogen. The tar-like substance has a content of n-heptane insolubles of up to 1 wt % and contains an aromatic oil fraction and a resin fraction as the principal components of n-heptane soluble components. The aromatic carbon fraction, fa, is at least 0.7, the number-average molecular weight is up to 1,000 and the maximum molecular weight is up to 2,000 for each of the aromatic oil and resin fractions.

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patent: 4454020 (1984-06-01), Izumi et al.
patent: 4533461 (1985-08-01), Izumi et al.
patent: 4601813 (1986-07-01), Izumi et al.

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