Process for producing mesophase pitch
US4017327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1974 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Oct 31, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/90
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.