http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-202115158-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a52af89e67b7b044f04d055c573de211 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-22 |
| filingDate | 2020-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_edcfd89ca75658ff3ae44c6ae23ff740 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_37567dc2dedaaaf28f5274e02fbe7778 |
| publicationDate | 2021-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-202115158-A |
| titleOfInvention | Manufacturing method of polybenzoxazole precursor and polybenzoxazole precursor |
| abstract | The subject of the present invention is to provide a method for obtaining a polybenzoxazole precursor whose residual halogen is sufficiently reduced with good yield while suppressing the discharge of waste liquid.nThe solution is a manufacturing method of polybenzoxazole precursor, which is characterized by including:nThe step of reacting dicarboxylic acid dihalide and bis(o-aminophenol) in an aprotic polar solvent to obtain a crude product of polybenzoxazole precursor;nAccording to the situation, the crude product of the polybenzoxazole precursor obtained is washed with one or more solvents selected from water and methanol, and then dissolved in the first alcohol selected from the group (except methanol) and The step of obtaining an alcohol solution with one or more alcohols of the second-stage alcohol; and,nThe step of adding the obtained alcohol solution to water or an aqueous organic acid solution to precipitate the polybenzoxazole precursor. |
| priorityDate | 2019-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 92.