http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-889654-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3982d649dc40b2e9edf68cc78d984308 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-51 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-90 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B33-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C1-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H19-385 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H19-40 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B33-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H19-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H19-38 |
| filingDate | 1958-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-889654-A |
| titleOfInvention | Improvements in or relating to calcined clay products |
| abstract | A calcined kaolin, having a low abrasion value and suitable as a filler for paper or synthetic resins, is prepared by calcining kaolin, from which coarse impurities have been removed, and then fractionating the calcined kaolin to produce a fraction 80% by weight of which has a particle size below 2 microns. Alternatively, if the uncalcined kaolin powder contains at least 90% by weight of particles of 2 microns, calcination will produce the desired product without fractionating. The calcined powder, before or after fractionation, may be subjected to frictional working, by wet or dry milling, to lower the clay-water viscosity and the adhesive demand, namely the proportion of casein or other adhesive which is necessary to secure good adhesion of a coating of said kaolin to paper. The initial kaolin is normally crushed and mixed with an alkaline aqueous solution of a flocculating agent and the abrasive impurities sedimented. The resulting cleaned kaolin may be calcined at 980 DEG to 1030 DEG C., preferably in a multi-hearth furnace, the temperatures of which rise from 302 DEG C. to a maximum of about 1000 DEG C. The calcined aggregates, after cooling, are pulverized in a hammer mill and thereafter frictionally worked as an aqueous slurry having a pH from 7 to 10. For example, the calcined kaolin may be mixed, before or after fractionating, with sodium tripolyphosphate or tetrasodium pyrophosphate and ball milled, after which the clay is flocculated by adding alum to bring the pH to about 4. The low abrasion, calcined kaolin may be employed as a filler for paper in association with other known fillers, such as uncalcined kaolin. The calcined powder should constitute at 15% and generally at least 50% by weight of such total filler. Alternatively, the calcined low abrasion kaolin may be used as the sole filler, for example in cigarette paper, in amounts of 2-3% by weight. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108676386-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108676386-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5169443-A |
| priorityDate | 1957-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.