| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f8877d26e7e712d48efb03a75bd073f3 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-025
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-0263
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-0259
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-0204
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-0254 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-0263 |
| filingDate |
2015-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2020-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f853bd46df02cdae9b2ae2c1eb4acc20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b44a7cce4732dbdfd2c1d60741489d03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a21782c4b1a9b7df9d2d83353d5b7563
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a3d290ba7c66e374fd153f528c433e2c |
| publicationDate |
2020-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-10647818-B2 |
| titleOfInvention |
Polyarylene sulfide production method and polyarylene sulfide |
| abstract |
A method of producing a polyarylene sulfide (PAS) includes a preparation step of preparing a charged mixture containing an organic amide solvent, a sulfur source, water, and a dihalo aromatic compound; a first-stage polymerization step of performing a polymerization reaction on the charged mixture at a temperature of from 170 to 280° C. to produce a prepolymer having a conversion ratio of the dihalo aromatic compound of 50% or greater; and a second-stage polymerization step of continuing the polymerization reaction in a phase-separated state at a temperature of from 245 to 290° C. in a reaction system containing the prepolymer, and includes adding a polyfunctional compound to the reaction system in the phase-separated state. A PAS having a melt viscosity (310° C., shear rate: 1216 sec−1) of from 0.1 to 8000 Pa·s is produced by the method. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11407861-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11319441-B2 |
| priorityDate |
2015-01-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |