http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112194783-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-0208 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-305 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2020-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112194783-B |
| titleOfInvention | A kind of organic base synergizes Ti/Si composite material to catalyze the preparation method of high molecular weight polybutylene carbonate |
| abstract | A method for preparing high molecular weight polybutylene carbonate by catalyzing organic bases in conjunction with Ti/Si composite materials. The invention belongs to the field of polybutylene carbonate polymerization. The invention solves the technical problems of long prepolymerization reaction time, accompanying side reactions and low molecular weight of the obtained APC in the existing method for synthesizing APC. The method of the present invention: 1. Prepolymerization: in an inert gas atmosphere, add 1,4-butanediol, dimethyl carbonate and an organic base catalyst into the reactor, and carry out a transesterification prepolymerization reaction to obtain hydroxyl and methyl groups. Oxygen-terminated low-molecular-weight polybutylene carbonate; 2. Polycondensation: add Ti/Si catalyst to the reactor after step 1 to carry out a polycondensation reaction, and gradually reduce the vacuum degree during the polycondensation reaction to obtain a high molecular weight polymer. Butylene Glycol Carbonate. |
| priorityDate | 2020-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.