Low melting mesophase pitches

Details Low melting mesophase pitches Low melting mesophase pitches

1982-06-14

1984-04-17

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 40, 208 44, 208 45, 4234472, 4234474, 4234476, 423448, C10C 118, C10C 308, C10C 300

Patent

active

044433247

ABSTRACT:
A low melting point, low molecular weight, heptane insoluble, 1,2,4-trichlorobenzene soluble mesophase pitch useful in carbon fiber spinning as such or as a plasticizer in a carbon fiber spinning composition is obtained by heating chrysene, triphenylene or paraterphenyl as well as mixtures thereof and hydrocarbon fractions containing the same, dissolving the resulting heat treated material with 1,2,4-trichlorobenzene, and separating the insolubles, and then contacting the 1,2,4-trichlorobenzene soluble fraction with a sufficient amount of heptane to precipitate the low melting point, low molecular weight mesophase pitch.

REFERENCES:
patent: Re27794 (1973-10-01), Otani et al.
patent: 2698280 (1954-12-01), Hersberger
patent: 2847359 (1958-08-01), Beuther et al.
patent: 2915370 (1959-12-01), Mitchell
patent: 3080245 (1963-03-01), Herman et al.
patent: 3629379 (1971-12-01), Otani
patent: 3718574 (1973-02-01), Araki et al.
patent: 4016247 (1977-04-01), Otani et al.
patent: 4115527 (1978-09-01), Otani et al.
patent: 4209500 (1980-06-01), Chwastiak
patent: 4273675 (1981-06-01), Shuki et al.
patent: 4277325 (1981-07-01), Greenwood
Carbons Produced from known Org. Comp. Ianthracene and Phenanthrene Carbon, 1967, V, pp. 13-17, Walker.
Carbon-base Fiber Reinforced Plastics, Chem. Eng. Prog., vol. 58, No. 10, Oct. 1962, pp. 42-80, Schmitt.

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