http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007327029-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6c8d4dc7bd1a30d8fda907fceaeb4e69 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-80 |
| filingDate | 2007-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a01d93cd96a2f11498833a506130748a |
| publicationDate | 2007-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2007327029-A |
| titleOfInvention | Method for producing polyethylene terephthalate |
| abstract | Low molecular weight PET prepolymer particles are heat-treated and subjected to solid phase polycondensation at a high polycondensation reaction rate without causing particle fusion to efficiently produce high molecular weight PET. A PET prepolymer having an intrinsic viscosity of 0.18 dL / g or more and 0.40 dL / g or less is heat-treated in a solid state in an inert gas atmosphere or under reduced pressure to obtain an intrinsic viscosity of 0.70 dL / g or more. A method for producing PET. A heat treatment is a first-stage solid phase polycondensation step in which the heat treatment temperature (T1) is 190 ° C. or higher and 225 ° C. or lower, and a step in which the temperature is raised from the temperature (T1) or lower to the temperature (T2). In this order, the temperature raising step for raising the temperature from temperature TI (° C.) to (T1 + 15) ° C. within 30 minutes and the second stage solid phase polycondensation step for heat treatment temperature (T3) 190 ° C. to 240 ° C. Including. T1 + 15 ≦ T2 (Formula 1) 205 ° C. ≦ T2 ≦ 240 ° C. (Formula 2) [Selection] Figure 1 |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110095457-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011527363-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9242218-B2 |
| priorityDate | 2006-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 85.