http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113429555-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-0208 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/C08G64-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2021-07-20-04:00^^<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-113429555-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: mixing polyol, carbonate and sodium alkoxide catalysts, carrying out a transesterification polycondensation reaction to obtain a product intermediate; mixing the product intermediate and an acidic reagent, heating at 160° C. The reaction is carried out at an ambient temperature of ~200° C., and then pressure-filtered at an ambient temperature of not less than 100° C. to remove the solid; the acidic reagent is selected from an aqueous phosphoric acid solution or an aqueous hydrochloric acid solution. The preparation method of the invention is simple to operate, convenient, energy-saving and environmentally friendly, greatly reduces labor and material costs in industrial production, saves production costs, and has better catalyst removal effect. The catalyst content is low. |
| priorityDate | 2021-07-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.