http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2566400-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2277519e0ae57d944d595debd6d1e688 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-31678 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-239 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-256 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-2982 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K3-015 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K3-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K3-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-08 |
| filingDate | 2008-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2016-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0e4c416df590749b2aeadd66fe3859d9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22b5cdecf7c1a98c5134ac123c82afc4 |
| publicationDate | 2016-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2566400-T3 |
| titleOfInvention | Antimicrobial plastic product, and procedure for its preparation |
| abstract | Process for producing a product of antimicrobial plastic material, comprising (a) Providing a solution of a silver salt in aqueous ammonia, (b) adding phosphoric acid under precipitation of silver orthophosphate as a solid, which is contained in the suspension until that the pH value of the suspension is between 6.0 and 8.0, (c) separate the solid material, and as well as the following steps according to alternative 1 (d1) the solid material is suspended in deionized water, (e1 ) adding aqueous ammonia to the suspension and heating the mixture at a temperature in the range of 40-90 ° C, in which the amount of ammonia is such that at the temperature selected in the range of 40 to 90 ° C, 1 % by weight to 80% by weight of silver ions comes into solution, (f1) adding a reducing agent at the temperature chosen in the range of 40 to 90 ° C in an amount sufficient to reduce the silver ions in solution to metallic silver, so that a partially reduced silver orthophosphate is formed as a suspended solid (g1) to separate the solid material, (h1) repeated washing of the solid with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after the separation of the solid material has a value below 20 μS / cm, or the following steps according to alternative 2 (d2) suspend the solid in deionized water, (e2) add a reducing agent at the temperature chosen in the interval from 40 to 90 ° C in a sufficient amount, from 1% to 65% by weight, to reduce the silver orthophosphate contained in the suspension of the solid to metallic silver, so that a partially reduced silver orthophosphate is formed as solid (f2) separating the solid material, (g2) repeatedly washing the solid material with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after separation of The solid has a value below 20 μS / cm, or the following steps according to alternative 3 (d3) repeatedly wash the solid material with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after solid separation shows a value of less than 50 μS / cm, (e3) the solid material is suspended in deionized water, (f3) adding aqueous ammonia to the suspension and heating the mixture at a temperature in the range of 40 to 90 ° C, the amount of ammonia being such that at the temperature selected in the range of 40 to 90 ° C, a solution of 1% to 80% 45 by weight of the silver ions enters, ( g3) adding a reducing agent at the temperature chosen in the range of 40 to 90 ° C in an amount sufficient to reduce silver ions in solution to metallic silver, so that a partially reduced silver orthophosphate is formed as solid . (h3) separating the solid material, (i3) repeatedly washing the solid material with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after separation of the solid has a value of less than 20 μS / cm, or the following steps according to alternative 4 (d4) repeatedly wash the solid with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after separation of the solid has a value of less than 50 μS / cm, (e4) the solid material is suspended in deionized water (f4) add a reducing agent at the temperature chosen in the range of 40 to 90 ° C in an amount sufficient to reduce to metallic silver 1 to 65% by weight of the silver orthophosphate contained in the suspension of the solid., so that a partially reduced silver orthophosphate is formed as a solid, (g4) separating the solid material, (h4) repeatedly washing the mat solid waste with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after separation of the solids yields a value below 20 μS / cm, or the following steps according to the alternative 5 (d5) wash the separated solid material several times with portions of deionized water until the specific conductivity at 25 ° C of the last portion of the wash water after separation of the solid has a value below 50 μS / cm, preferably less than 20 μ / cm, (e5) dry the solid material, (f5) optionally crushing the dried solid material, (g5) suspend the solid material in deionized water and heat the suspension at a temperature in the range of 70 ° C to 100 ° C, (h5) dissolve citrate, preferably trisodium citrate, in deionized water and heating the aqueous solution at a temperature in the range of 70 ° C to 100 ° C, where the amount of citrate is dimensioned in such a way that it is sufficient to reduce the crushed silver orthophosphate contained in the suspension of the solid material (i5) to the metallic silver by adding 1% of the aqueous citrate solution in one portion to the suspension and stir the suspension at a temperature in the range of 70 ° C to 100 ° C forming a partially reduced silver orthophosphate as a solid, thereby maintaining the temperature within said range by means of heat supply, (k5) terminate the heat supply and continue stirring the suspension until it has cooled to room temperature, (l5) separating the solid material, (m5) repeated washing of the solid material with portions of deionized water until the specific conductivity at 25 ° C of the last portion of wash water after separation of the solid material has a value below 20 μS / cm, and the additional steps of (n) drying the solid material, (or) incorporating The solid material in a plastic precursor, which has not been treated with or contains a colloidal metal, and (p) molding of the plastic product. |
| priorityDate | 2007-07-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 110.