http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9902775-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_47a9da1ed075696a22485fde63555046 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e7637d5b4543ba229a5c4f8aa14ffa15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_861097986a4b0a9ac1c42889dfff204c |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-53 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-10 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-53 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-10 |
| filingDate | 1998-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1d851c41e963bc5962ac249f83dc574b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b348d128628992eece8bb61344969211 |
| publicationDate | 1999-01-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9902775-A1 |
| titleOfInvention | Retention agent |
| abstract | A method and an agent for improving the retention when dewatering a cellulosic fibre suspension are disclosed. In the method, there is added to the suspension a retention agent containing a phenol-formaldehyde resin and a polyethylene oxide, and the method is characterised in that a modified phenol-formaldehyde resin containing cationic groups is added to the suspension. The modified phenol-formaldehyde resin preferably has a cationicity of about 5-85 % and the cationic groups preferably consist of amine groups. The polyethylene oxide in the retention agent preferably has a molecular weight of about 0.5-20 x 106. The modified phenol-formaldehyde resin and the polyethylene oxide are preferably added to the suspension in a weight ratio of modified phenol-formaldhyde resin:polyethylene oxide of from 1:5 to 50:1, and the amount of polyethylene oxide added preferably is about 10-1000 ppm, based on the dry solids content of the suspension. Preferably first the modified phenol-formaldehyle resin is added to the suspension and then the polyethylene oxide. |
| priorityDate | 1997-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.