http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110785445-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-001 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2400-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-08 |
| filingDate | 2018-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110785445-B |
| titleOfInvention | Preparation method of copolymer |
| abstract | The present invention provides a method for preparing a copolymer, comprising: 1) initiating polymerization by adding an aromatic vinyl-based monomer and a vinyl cyanide-based monomer into a reactor in batches; and 2) after the initiating polymerization The polymerization is carried out by continuously adding an aromatic vinyl-based monomer to the reactor at a predetermined rate, wherein the continuous addition of the aromatic vinyl-based monomer starts when the polymerization conversion rate is 10% or less, and starts at a polymerization conversion rate of 10% or less. The conversion rate is terminated when the conversion rate is 80% to 90%, and step 2) includes a first temperature section and a second temperature section, the first temperature section and the second temperature section are respectively maintained at a constant temperature, wherein the second temperature section is The temperature of the temperature zone is higher than the temperature of the first temperature zone, so that a copolymer having a small standard deviation of vinyl cyanide-based unit composition and excellent transparency can be produced. |
| priorityDate | 2018-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 89.