http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2000510878-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J21-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J21-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-08 |
| filingDate | 1996-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2000-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2000510878-A |
| titleOfInvention | Method for producing polytetramethylene ether glycol diester over aluminum-magnesium silicate catalyst |
| abstract | (57) Abstract: fixed bed - by polymerization of tetrahydrofuran in the presence of a polymerization catalyst and a carboxylic acid anhydride of the formula: R-CO-O (-CH 2 -CH 2 -CH 2 -CH 2 -O) n - An improved process for preparing a polytetramethylene ether glycol diester represented by COR 1 wherein R and R 1 are the same or different and represent an alkyl group or a derivative of an alkyl group. By using neutral or weakly basic magnesium-aluminum-hydrosilicate catalysts in place of the known acidic montmorillonite-, zeolite- or kaolin catalysts, heavy polymerizations with higher polymerization rates, uniform properties and narrow molecular weight distributions are obtained. Coalescence can be obtained even with industrial quality tetrahydrofuran. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2016196587-A |
| priorityDate | 1995-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.