http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2001122953-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-181 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate | 1999-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f39e76752d0043958f14fa0830fce46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3563b6617f3a1eeaeaf91e3572d8452 |
| publicationDate | 2001-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2001122953-A |
| titleOfInvention | Method for producing isophthalate-based polyester |
| abstract | PROBLEM TO BE SOLVED: To provide a method for producing an isophthalate-based polyester which is practical in terms of cost and productivity and has a sufficient degree of polymerization as a molding material with a low quality of oligomer by-products. I do. SOLUTION: When bis (2-hydroxyalkyl) isophthalate and / or an oligomer thereof are heated and polycondensed to produce an isophthalate-based polyester, bis-2-hydroxyalkyl oxalate of the following formula (1) is converted to isophthalic acid. The polycondensation reaction is carried out by adding the polycondensation reaction at a ratio of 1 to 50 mol% with respect to the acid structural unit. When the polycondensation reaction is almost completed, the oxalic acid-based active ester compound represented by the following formula (2) is mixed with the polymerization mixture. The polymer having a sufficient degree of polymerization can be efficiently produced by adding 0.1 to 10 mol% to the mixture and causing a chain extension reaction. HO-R-O-C (O) -C (O) -OR-OH {(1) Ar-OC (O) -C (O) -O-Ar '} (2) [ R in the above formula (1) is the same alkylene group as the alkylene group constituting the diol component of the polyester; Ar and Ar ′ in the formula (2) are the same or different, and are mononuclear aromatic hydrocarbon groups which may be substituted with a nucleus. ] |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2001131273-A |
| priorityDate | 1999-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 93.