| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28a869d6fc950d50f6df03f549ca3afa |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-0254 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-0209
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-0254
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-02 |
| filingDate |
1987-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cb570f7157473390478b2b94e227f666
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_15c2de3e3576dd70dc6c366c2b7239d9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f8b1c0f12c15bdd804c8b283a6ee363
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8adca4a712c2fd79c938b33a3e57731c |
| publicationDate |
1988-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0259984-A1 |
| titleOfInvention |
Process for producing a polyarylene sulfide |
| abstract |
High-molecular-weight or ultra-high-molecular-weight PAS is prepared by:n (1) a preliminary polymerization step of subjecting an alkali metal sulfide and a dihalo aromatic compound to dehalogenation and sulfidation in a system where the amount of an aprotic organic polar solvent used is from 0.2 to 5 kg per mol of the alkali metal sulfide charged and where from 0.5 to 5 mol of water is present per kg of the organic polar solvent, until the conversion of the dihalo aromatic compound charged reaches from 50 to 98 mol% and the melt viscosity of the resultant prepolymer reaches from 0.5 to 30 Pas (from 5 to 300 poise) (as measured at 310°C under a shear rate of 200 sec⁻¹); and (2) a two phase separated polymerization step comprising:n (I)n (i) adding water to the resultant reaction mixture such that from 5.5 to 15 mol of water is present per kg of the organic polar solvent in the reaction system without separating the resultant prepolymer from the reaction system, or (ii) separating the resultant prepolymer, dispersing the thus separated prepolymer in an aprotic organic polar solvent containing from 5.5 to 15 mol of water per kg of the organic polar solvent such that from 0.5 to 3.5 mol of arylene group(s) therein is present per kg of the organic polar solvent; and (II)n (i) heating and maintaining the reaction system for at least 10 minutes at a temperature (T₁) of from 257 to 290°C while stirring, the reaction system from step (I) (ii) being in a strongly alkaline condition (pH of the 10-fold diluted dispersion with water being not less than |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1586601-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1586601-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7767783-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5241043-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0598449-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0667368-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0323175-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0323175-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1550686-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5777069-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1550686-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0798330-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0667368-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5554723-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0798330-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6982312-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6369191-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0598449-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7504476-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5475081-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1324070-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004009674-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5688908-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0565269-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0435209-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0435209-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7220817-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1375541-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5894072-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1375541-A4 |
| priorityDate |
1986-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |