http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-756692-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e154ffbfed5c14e0bc942692e7043bd |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2301-26 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-215 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06M13-21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B11-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06M15-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06M11-79 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K3-36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B11-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-215 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06M15-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06M13-21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06M11-79 |
| filingDate | 1953-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-756692-A |
| titleOfInvention | Improvements in or relating to the production of stable dispersions of silicon dioxide in solutions of cellulose ethers and the sizing of textile yarns with such dispersions |
| abstract | A mixture which, when added to water, yields a stable dispersion of colloidal silica in a cellulose ether solution is prepared by adding an aqueous solution of an alkali-metal silicate to the reaction mixture in the preparation of the cellulose ether, the reaction mixture being neutralized with acid either after or both before and after the addition of the silicate solution so that the resulting mixture, when diluted with sufficient water to reduce the concentration of the cellulose ether to 0.25 per cent, gives an aqueous dispersion of colloidal silica having a pH within the range 5-9 and preferably 6-8. In an example, soda cellulose is mixed with sodium monochloracetate, an aqueous solution of sodium silicate is added and the mixture is neutralized with acetic acid and dried. In a second example, a mixture prepared in the same manner is purified by extraction with 60 per cent aqueous ethanol and dried again. In a third example, a mixture of sodium carboxymethyl cellulose and sodium silicate is prepared as in the first example and suspended in 60 per cent aqueous ethanol containing sufficient hydrogen chloride to neutralize the mixture. The suspension is then centrifuged and the solids thus separated and dried. Mixtures of the compositions with water may be used for the sizing of textile threads (see Group IV (c)). U.S.A. Specification 2,570,830 is referred to.ALSO:Textile threads are sized with an aqueous solution of a cellulose ether containing dispersed colloidal silica. The solution is made by adding water to a composition prepared by adding an aqueous solution of an alkali - metal silicate to the reaction mixture in the preparation of the cellulose ether, the reaction mixture being neutralized with acid either after or both before and after the addition of the silicate solution so that the resulting mixture when diluted with sufficient water to reduce the concentration of the cellulose ether to 0.25 per cent, gives an aqueous dispersion of colloidal silica of pH 5-9 and preferably 6-8 (see Group IV(a)). In an example woollen yarn is sized with an aqueous solution of sodium carboxy methyl cellulose containing dispersed colloidal silica prepared as described above. U.S.A. Specification 2,570,830 is referred to |
| priorityDate | 1952-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.