http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2000501766-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2696 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20 |
| filingDate | 1996-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2000-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2000501766-A |
| titleOfInvention | Improved process for producing diacetate of polytetramethylene ether |
| abstract | (57) [Summary]nTetrahydrofuran (THF), optionally with one or more comonomers (eg, 3-methyl THF, ethylene oxide, propylene oxide, etc.), and a solid acid catalyst [eg, Nafion®] and carboxylic anhydride as a molecular weight regulator Involves the polymerization using a carboxylic acid with the product (eg, acetic acid with acetic anhydride), by setting the reactor pressure while simultaneously operating under solvent / monomer evaporative reaction conditions. An improved process for producing diesters of polytetramethylene ether, wherein achieving heat removal effectively controls the reaction temperature. Such a method is useful for producing high purity commercial grade PTMEA which advantageously avoids the problems caused by high heats of reaction when the method is scaled up to commercial levels. |
| priorityDate | 1995-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.