http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109593188-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-5407 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C227-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-54 |
| filingDate | 2018-11-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109593188-B |
| titleOfInvention | Method for preparing polycarbonate based on strong-basicity ionic liquid high-efficiency catalysis |
| abstract | The invention relates to a method for preparing polycarbonate by high-efficiency catalysis based on strongly alkaline ionic liquid, which is characterized in that the aromatic or aliphatic polycarbonate is prepared by high-efficiency catalysis of reaction taking dihydroxy compounds and carbonic acid diester as raw materials by using ionic liquid which is formed by taking quaternary phosphorus as cations and taking amino acid radicals as anions as catalysts. The dosage of the ionic liquid catalyst is 1 x 10 of the mass of the dihydroxy compound ‑6 About 2 percent, the reaction temperature is 100 to 200 ℃, the pressure is 20kPa to normal pressure, and the reaction time is 0.5 to 6 hours in the prepolymerization stage; in the polycondensation stage, the reaction temperature is 220-280 ℃, the pressure is 20-300 Pa, and the reaction time is 0.1-5 h. The synthesis method has the characteristics of good intermiscibility of the catalyst and raw materials, small using amount, high activity and high molecular weight of the product polycarbonate. |
| priorityDate | 2018-11-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 206.