| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_114e4423ec77cbc8dab9d0a98909704e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-85
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-87 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-87
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate |
1993-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1994-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_99eb02ebf41af462f752a0b30b95f617
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_006113930e60127b13215ae216fc70be
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dc340912506d925f02fdcab86e0d5d67
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_abfa8e9a326fed5ccec6854fc10c2fa1 |
| publicationDate |
1994-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5340908-A |
| titleOfInvention |
Process for the preparation of aromatic polyesters |
| abstract |
This invention relates to a process for the preparation of aromatic polyester(s) having an intrinsic viscosity greater than 0.4 dL/g in chloroform at 30° C. which comprises (a) reacting diarylesters of tere and isophthalic acid(s) and dihydric phenol(s) in the melt phase in an inert atmosphere in the presence of a catalyst selected from alkoxides of Group IV B metals and derivatives of Group IV A metals and in the presence of an organic solvent at a temperature in the range of 100°-300° C. to form a prepolymer having intrinsic viscosity in the range of 0.1 to 0.3 dL/g in chloroform at 30° C. (b) purifying the prepolymer using conventional solvent extraction methods and (c) Polycondensing the purified prepolymer at a temperature in the range of 300°-350° C. in presence of a catalyst selected from alkoxides of Group IVB metals and derivatives of Group IVA metals under reduced pressure. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5852164-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5731401-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19715682-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5714567-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100934312-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9814501-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1310516-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6150493-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0807655-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6653440-B2 |
| priorityDate |
1993-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |