http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103804670-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate | 2012-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2016-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2016-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103804670-B |
| titleOfInvention | The synthesis technique of polyester diol |
| abstract | The invention discloses a kind of synthesis technique of polyester diol, this synthesis technique in turn includes the following steps: (1) synthesis under normal pressure: at normal pressure, nitrogen or protection of inert gas, 150-200 DEG C, dibasic alcohol and diprotic acid or dibasic acid anhydride generation esterification, record aquifer yield, when aquifer yield reaches more than 50% of theoretical aquifer yield, be warming up to 200-250 DEG C and continue esterification, when aquifer yield is greater than 90% of theoretical aquifer yield, detect acid value, when acid value is 15-50mgKOH/g, keep constant temperature, carry out vacuum reaction; (2) vacuum reaction: be less than the vacuum condition of 0.01MPa at pressure under, continues esterification and detects acid value, and stop esterification when acid value is less than 0.50mgKOH/g, obtained hydroxyl value is the polyester diol of 25-130mgKOH/g.Synthesis technique of the present invention is by this number of processes process, and the synthesising stability of polyester diol improves greatly, when fixed feeding area than, acid value and hydroxyl value can be controlled simultaneously. |
| priorityDate | 2012-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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