A method for producing a precursor pitch for carbon fiber
Precursor pitch to be used for formation of carbon fiber is produced by heating a coal tar soft or middle pitch at a temperature of 350-500 DEG C at a first stage to form mesophase, extracting the thus treated pitch with a solvent, separating and removing the solvent insoluble portion including meso...
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| creator | YUDATE, KOZO NAKASAWA, KEN |
| description | Precursor pitch to be used for formation of carbon fiber is produced by heating a coal tar soft or middle pitch at a temperature of 350-500 DEG C at a first stage to form mesophase, extracting the thus treated pitch with a solvent, separating and removing the solvent insoluble portion including mesophase to obtain a pitch containing no free carbon and further at the second stage heat-treating the pitch containing no free carbon in an inert gas atmosphere under atmospheric pressure or a reduced pressure under the following condition 600-1.2 T |
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fre ; ger</language><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS ; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS ; NATURAL OR ARTIFICIAL THREADS OR FIBRES ; SPINNING ; TEXTILES</subject><creationdate>1986</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19860305&DB=EPODOC&CC=EP&NR=0172955A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19860305&DB=EPODOC&CC=EP&NR=0172955A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YUDATE, KOZO</creatorcontrib><creatorcontrib>NAKASAWA, KEN</creatorcontrib><title>A method for producing a precursor pitch for carbon fiber</title><description>Precursor pitch to be used for formation of carbon fiber is produced by heating a coal tar soft or middle pitch at a temperature of 350-500 DEG C at a first stage to form mesophase, extracting the thus treated pitch with a solvent, separating and removing the solvent insoluble portion including mesophase to obtain a pitch containing no free carbon and further at the second stage heat-treating the pitch containing no free carbon in an inert gas atmosphere under atmospheric pressure or a reduced pressure under the following condition 600-1.2 T </= theta </= 8 1,800-3.6 T (provided that 350 </= T </= 500) wherein T( DEG C) is the temperature of the heat treatment and theta (min) is the time for which said temperature is held, to form bulk mesophase pitch containing 20-60% by weight of quinoline insoluble portion.</description><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</subject><subject>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</subject><subject>NATURAL OR ARTIFICIAL THREADS OR FIBRES</subject><subject>SPINNING</subject><subject>TEXTILES</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1986</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLB0VMhNLcnIT1FIyy9SKCjKTylNzsxLV0gEslOTS4uKQaKZJckZYPnkxKKk_DyFtMyk1CIeBta0xJziVF4ozc2g4OYa4uyhm1qQH59aXJCYnJqXWhLvGmBgaG5kaWrqaGhMhBIAre8t2A</recordid><startdate>19860305</startdate><enddate>19860305</enddate><creator>YUDATE, KOZO</creator><creator>NAKASAWA, KEN</creator><scope>EVB</scope></search><sort><creationdate>19860305</creationdate><title>A method for producing a precursor pitch for carbon fiber</title><author>YUDATE, KOZO ; 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| language | eng ; fre ; ger |
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| subjects | APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES |
| title | A method for producing a precursor pitch for carbon fiber |
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