http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2376435-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-183 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-183 |
| filingDate | 2000-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a626188b1ec4b5871078e1a6ea4b074 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79edd0e113a1b6ddcf18d0b975c83c98 |
| publicationDate | 2001-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2376435-A1 |
| titleOfInvention | Preparation of poly(trimethylene terephthalate) |
| abstract | In one embodiment, the invention is a process for the preparation of poly(trimethylene terephthalate) comprising: a) contacting terephthalic acid with 1,3-propanediol in the presence of an organic tin catalyst to form a bi s- (3-hydroxypropyl)terephthalate monomer; and b) polymerizing said monomer in the presence of organic titanate polycondensation catalyst to obtain the poly(trimethylene terephthalate). In another embodiment, the invention is a process for the preparation of poly(trimethylene terephthalate) containing less than 1.6 mol % of DPG said process comprising contacting terephthalic acid with a 1.6 to 1 to 2:1 molar amount of 1,3-propanediol in the presence of 20 to 120 ppm (as tin), by weight of the poly(trimethylene terephthalate), o f a organic tin catalyst, to form a bis(3-hydroxypropyl)terephthalate monomer and polymerizing said monomer to obtain the poly(trimethylene terephthalate) . The invention is also directed to poly(trimethylene terephthalate) produced by the processes. |
| priorityDate | 1999-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.