The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1988
Filed:
Jun. 02, 1987
Applicant:
Inventors:
Assignee:
Mitsubishi Oil Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10C / ; D01F / ;
U.S. Cl.
CPC ...
208 44 ; 208 22 ; 208 39 ; 208 40 ; 208 23 ; 106284 ; 1062731 ; 585 11 ; 528247 ; 4234471 ; 4234474 ;
Abstract
A process for producing an optically anisotropic pitch for use in the production of high performance carbon fibers, wherein a compound represented by the formula (1) as a raw starting material is mixed with one of heavy oils and subjected to thermal modification: ##STR1## wherein m is an integer of 2 or more; 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, a methyl group or an ethyl group; and R.sub.5 represents a hydrogen atom or a methyl group. The pitch has a softening point which can be set at discretion and excellent molecular orientation.