http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110121518-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1053 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1078 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1071 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1003 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L79-08 |
| filingDate | 2017-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-09-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-09-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110121518-B |
| titleOfInvention | Preparation method of polyetherimide |
| abstract | A method for preparing polyetherimide, comprising: in the presence of solvent and polymer additive, under imidization reaction temperature and pressure, make diamine, 4-halogen having four bonds between amine groups Phthalic anhydride and 3-halophthalic anhydride react to produce 3,3'-bis(halophthalimides), 3,4'-bis(halophthalimides) dicarboximide), 4,4'-bis(halophthalimide), a mixture of solvents and polymer additives in which 3-halophthalic anhydride and 4-halophthalic anhydride The molar ratio of diformic anhydride is 95:05 to 60:40; the mixture is reacted with an alkali metal salt of a dihydroxyaromatic compound to produce a cyclic compound content of less than 6 wt% based on the total weight of the polyetherimide A polyetherimide having a glass transition temperature greater than or equal to 220° C. and a weight average molecular weight greater than or equal to 25,000 Daltons; wherein the polymer additive is dissolved in a solvent at the imidization reaction temperature and pressure. |
| priorityDate | 2016-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 152.