http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4196279-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-84 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-84 |
| filingDate | 1978-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1980-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_205b121f36f7ae0d5b0508ae0db918a2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1727548283a2828587cd490626d670c8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_647ca6c8d8f0308aa11dbc8971411480 |
| publicationDate | 1980-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4196279-A |
| titleOfInvention | Process for producing polyesters having a high degree of polymerization |
| abstract | An improved process for producing a linear polyester having a high degree of polymerization which comprises first preparing a prepolymer of polyester and then polycondensing the prepolymer. In the first step, a prepolymer having an intrinsic viscosity of at least 0.2 is prepared, and the subsequent polycondensation is carried out in the presence of an organic boron compound of the formula <IMAGE> wherein R1, R2, R3 and R4 represent an alkyl, aralkyl or aryl group having 6 to 20 carbon atoms, and M represents a monovalent metal. According to this method, the polycondensation can be performed at atmospheric pressure, and a substantially linear polyester having an intrinsic viscosity of at least 0.5 and superior thermal stability can be obtained rapidly. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4269762-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5709916-A |
| priorityDate | 1977-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 342.