http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109134731-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2020-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2205-024 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2205-022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2030-08 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-64048 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-642 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M143-04 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10N30-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10N30-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10M143-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-642 |
| filingDate | 2017-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109134731-B |
| titleOfInvention | Lubricating oil viscosity index improver and preparation method thereof |
| abstract | The invention relates to the field of viscosity index improvers, and discloses a lubricating oil viscosity index improver and a preparation method thereof. The lubricating oil viscosity index improver contains an ethylene copolymer, wherein the weight average molecular weight of the ethylene copolymer is 50,000-150,000, and the molecular weight distribution is 1.5-3; the ethylene copolymer contains a structural unit derived from ethylene and a structural unit derived from an alpha-olefin, and the content of the structural unit derived from ethylene is 40 to 70% by weight based on the total amount of the ethylene copolymer. The method comprises contacting ethylene and alpha-olefin with a catalyst and a molecular weight regulator under olefin polymerization conditions in the presence of an organic solvent, wherein the catalyst contains a catalyst precursor with a structure shown in a formula (1) and alkyl aluminoxane. The viscosity index improver provided by the invention can show excellent thickening performance and high-temperature shear resistance, and has good low-temperature performance. |
| priorityDate | 2017-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.