http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6377991-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4eefac142a032449aa6a1a51fadaf766 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6402b23ab8782152be47b3996e48a4a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10C3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10C3-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10C3-10 |
| filingDate | 1986-09-22^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f8eb322b4b45f4fe270570b7cb429198 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c7ead6137353e3a7dcc41ace5e44345 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd3678d4660ffa9ade150f154133334f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c75838630e3feca1bc746f4ff92397e7 |
| publicationDate | 1988-04-08^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6377991-A |
| titleOfInvention | Production of precursor pitch for carbon fiber |
| abstract | PURPOSE: To prepare the title pitch which has an excellent thermal stability and a low viscosity and is homogeneous, by heat-treating soft or medium pitch free from free carbon under particular conditions. n CONSTITUTION: Coal tar having a quinoline insoluble content of 5wt% or lower is mixed with a 1W5-fold amount of an arom. solvent, such as benzene or toluene. Solvent insolubles, such as free carbon and polymer components, are removed from the mixture by centrifugal separation, filtration or the like at a temperature (40W70°C) lower than the boiling point of the solvent, followed by distillation to remove the solvent and the low-boiling component in the tar, thereby preparing soft or medium pitch having a free carbon content of 0.01wt% or lower. The pitch is heated in an inert gas atmosphere at 450W500°C under a reduced pressure of 0.1W10Torr to prepare precursor pitch for a carbon fiber which exhibits a viscosity of 100P at 385°C or below, a benzene insoluble content of 80vol% or higher, a quinoline insoluble content of 50wt% or lower, and an optically anisotropic component content of 80vol% or higher. n COPYRIGHT: (C)1988,JPO&Japio |
| priorityDate | 1986-09-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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