http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-527318-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b8be6a6c990669567cc455d32b00535e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-143 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-146 |
| filingDate | 2000-06-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2003-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_098a127a6cb59958eb10f54d190ca955 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d28e0bb3e93798c05183fc2bff0bc411 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b616fec66fa886c93bd8156b6071ae9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba3faea0ea696fd67f2ca3146ac6f326 |
| publicationDate | 2003-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-527318-B |
| titleOfInvention | Silica-based sols |
| abstract | The invention relates to an aqueous sol containing silica-based particles which has an S-value within the range of from 10 to 45%, a viscosity within the range of from 5 to 40 cP, and a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1, or a silica content of at least 10% by weight. The invention further relates to a process for the production of silica-based particles comprising the steps of (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol, (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight to, (c) allowing particle growth of the alkalised sol for at least 10 minutes, or heat-treating the alkalised sol at a temperature of at least 30 DEG C, and then (d) alkalising the obtained sol to a pH of at least 10.0. The invention further relates to silica-based particles obtainable by the process, the use of the silica-based particles as drainage and retention aids in the production of paper as well as a process for the production of paper from an aqueous suspension containing cellulosic fibres, and optional filler, in which silica-based particles and at least one charged organic polymer are added to the cellulosic suspension. |
| priorityDate | 1999-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.