| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_824448eec22bc414e8c5bd3143473df1 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2201-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2800-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-45
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-455
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F222-385
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L39-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J11-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-44 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-45
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-18 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-34 |
| filingDate |
2015-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_74dcb1900b952a83914689f2735d01d3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_da7e174114e06347ef1136250dc92a7c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_10997238c00566144de4c8de59992b04 |
| publicationDate |
2015-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2933976-A1 |
| titleOfInvention |
Aqueous solution of cationic copolymers derived from acrylamide, preparation method and use |
| abstract |
The present invention relates to a method for preparing an aqueous polymer solution containing at least one cationic or amphoteric (co)polymer, said method comprising the following steps: carrying out a degradation reaction, referred to as a Hofmann reaction, on a (co)polymer based on at least one non-ionic monomer selected from the group comprising acrylamide, methylacrylamide, N,N-dimethylacrylamide and acrylonitrile; post-treating the obtained aqueous polymer solution having viscosity V1; characterised in that the post-treatment comprises the following consecutive steps: obtaining an aqueous polymer solution containing at least one cationic or amphoteric (co)polymer from the Hofmann degradation reaction; post-treating said aqueous polymer solution; characterised in that the post-treatment comprises the following consecutive steps: a) adjusting the pH of the aqueous polymer solution to a value no lower than 5.5; b) lowering the pH of the aqueous polymer solution to a value of 2 to 5. The invention also relates to the use of said polymer solution as a flocculation, retention and/or drainage agent and a dry strength agent in the paper industry. |
| priorityDate |
2014-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |