| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F6-605
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-46 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F6-60 |
| filingDate |
2000-10-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2003-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ea4307df491d1d9af95406e9b7387283
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2e14b926751e15e44ee58d894ce624bc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3846ac67c6779bc348dcfe9271b5cd1c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2560e1be4fafb0df4cac01bc67a22cfe |
| publicationDate |
2003-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6569987-B1 |
| titleOfInvention |
Process for producing meta-aromatic polyamide fiber |
| abstract |
To produce meta aramid filaments having a good quality from a polymer solution of a meta aramid produced by a solution polymerization method, with high efficiency, (1) a meta aramid is prepared by polymerization-reacting a aromatic meta-diamine with a aromatic meta-dicarboxylic acid chloride in a polar organic solvent; (2) hydrogen chloride contained in the resultant polymer solution is neutralized with a neutralizing agent containing an alkali metal hydroxide which can react with hydrogen chloride to produce a salt thereof insoluble in the polymerization solvent; (3) the salt deposited from the polymer solution is removed by filtration; (4) the resultant polymer solution is mixed with water and a polar organic amide solvent to prepare a spinning solution; (5) the resultant meta aramid spinning solution is directly extruded in the form of filamentary streams into an aqueous coagulation liquid, to coagulate the extruded filamentary streams of the polymer solution into the form of filaments; (6) the coagulated filaments are immersed in water to remove the salt and the solvent from the filaments; and (7) the water-washed filaments are drawn and heat-treated. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7998575-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009054620-A1
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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006235104-A1
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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012168983-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009160079-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009160081-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009160080-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009160082-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109537096-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8415417-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103328698-B |
| priorityDate |
1999-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |