Process for producing mesophase pitch

Details Process for producing mesophase pitch Process for producing mesophase pitch

1974-10-31

1977-04-12

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

106277, 106284, 2523115, 264 291, 4234474, C08L 9500

Patent

active

040173275

ABSTRACT:
An improved process for producing pitch which is transformed, in part, to a liquid crystal or so-called "mesophase" state. According to the process, the mesophase content of the pitch is formed while agitating the pitch so as to produce a homogeneous emulsion of the immiscible mesophase and non-mesophase portions of the pitch. Mesophase pitches prepared in this manner have been found to possess a lesser amount of high molecular weight molecules in the mesophase portion of the pitch and a lesser amount of low molecular weight molecules in the non-mesophase portion of the pitch, and thus a smaller differential between the average molecular weights of the mesophase and non-mesophase portions of the pitch, than mesophase pitches having the same mesophase content which have been prepared in the absence of such agitation.

REFERENCES:
patent: 3629379 (1971-12-01), Otani
patent: 3716607 (1973-02-01), Otani
patent: 3787541 (1974-01-01), Grindstaff et al.
patent: 3812240 (1974-05-01), Whittaker et al.
patent: 3814566 (1974-06-01), Stroup

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