http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5767629-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/D01F6-62 |
| filingDate | 1980-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2989e6f8415e932109f0c9d62ac79558 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dc3e98cdbf31c9e294b6964c6dcb1308 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0aa8c7cf08f4f3625221f6f68a1d5804 |
| publicationDate | 1982-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5767629-A |
| titleOfInvention | Preparation of polyester |
| abstract | PURPOSE: To carry out the melt polymerization of a polyester, in high efficiency, using a raw material containing water and decomposable components, by keeping at least a part of the raw material in the absence of a catalyst at a temperature between the melting point and the decomposition temperature of the raw material. n CONSTITUTION: A dicarboxylic acid lower alkyl ester (e.g. dimethyl sebacate) and a glycol (e.g. hexamethylene glycol), or an oxycarboxylic acid lower alkyl ester (e.g. hydroxyethoxybenzoic acid) are charged in a reactor as the raw materials, and heated at a temperature at or above the melting point and below the decomposition temperature of the raw material (e.g. 120W145°C) under inert gas stream for a definite time interval to distill off at least a part of the low-boiling component such as water or the decomposition product in the raw material. After the treatment, the raw material are subjected to the melt polymerization in the presence of a catalyst (e.g. tetrabutyl titanate). n COPYRIGHT: (C)1982,JPO&Japio |
| priorityDate | 1980-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.