http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2017140453-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_78ca80ad4b743c901ec136b21263f093 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-183 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F6-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-785 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-183 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate | 2017-01-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_522c8359b33e2d7e924ca7466806eafd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ff55f4a26f64bd677f921d8bf490ac9 |
| publicationDate | 2017-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2017140453-A1 |
| titleOfInvention | Process for the production of poly(butylene terephthalates) |
| abstract | The present invention relates to a process for the production of poly(butylene terephthalate) comprising the steps of: (i) providing a poly(butylene terephthalate) oligomer having an intrinsic viscosity (IV) of 0.25 – 0.35 dl/g, a carboxylic end group (CEG) content of 25-35 mmol/kg, and a ratio of IV : CEG of ≤ 15 dl/mmol; (ii) introducing said poly(butylene terephthalate) oligomer to a low-pressure reactor; and (iii) performing a polycondensation reaction in said low-pressure reactor by subjecting the poly(butylene terephthalate) oligomer to a pressure of ≥ 0.05 and ≤ 5.0 mbar at a temperature of 235 to 255 °C, for such average residence time to obtain a poly(butylene terephthalate) having a ratio of IV : CEG of ≥ 18 dl/mmol, preferably ≥ 25 dl/mmol and having an IV of ≥ 0.45 dl/g; wherein steps (i), (ii) and (iii) are conducted in that order. Such process allows for the production of poly(butylene terephthalates) having a desired low CEG at given, desired high, IV using a poly(butylene terephthalate) oligomer having a relatively high CEG at given IV. Such process allows for the production of poly(butylene terephthalates) using poly(butylene terephthalate) oligomers obtained from an esterification process using PTA and 1,4-butanediol. |
| priorityDate | 2016-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.