| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1139562b85064a01a57a7fd052ebfd57 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-585 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-508
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-5083 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-508
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-58 |
| filingDate |
2019-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2022-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_23318536804ff1ac3272ae7a80604534
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1287bf5a679b99bed5a3e943e9273dc7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_16d52a7f4b591b7814aae90e524546fd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_716e877ce6233f27c4bcc6c8e3f8b47b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f0f40f1c4559afdebe2d4f6e9eb4ad3 |
| publicationDate |
2022-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-11447589-B2 |
| titleOfInvention |
Temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer and preparation method thereof |
| abstract |
A main chain of a temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer is composed of the following repeating unit (I): n nIn the repeating unit (I): x:y:z=(20˜80):(20˜80):(2˜30); the R 1 and R 2 groups are alkylamines having a multi-branched structure. The beneficial effect of the multi-branched polymer fluid loss reducer is: introducing cheap acrylamide branch monomer into the polymer monomer system of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid, the preparation process is simple, the reaction conditions are mild, and the production cost is significantly reduced. |
| priorityDate |
2019-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |