http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113416303-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-141 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-42 |
| filingDate | 2021-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113416303-B |
| titleOfInvention | Polycarbonate diol and preparation method thereof |
| abstract | The invention relates to the technical field of fine chemicals, in particular to a polycarbonate diol and a preparation method thereof. The preparation method of the polycarbonate diol includes the following steps: using polyol and carbonate as main raw materials, and preparing a crude product of the polycarbonate diol through transesterification polycondensation reaction; collecting polycarbonate with a molecular weight of 600-1100 Diol crude product; mixing polycarbonate diol crude product with molecular weight of 600-1100, organic dibasic acid and dehydrating agent, stirring reaction, suction filtration, to prepare polycarbonate diol. The preparation method of the invention can increase the molecular weight of the low molecular weight polycarbonate diol crude product within a controllable range, thereby meeting application requirements. |
| priorityDate | 2021-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.