http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019219403-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_26c475bcbe0c24b485b6f37c45cd921f |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C2222-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C2222-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-182 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-18 |
| filingDate | 2019-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_251957c62d0627b088f57d9704a6eb46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ab2cd44f0d589bb8998bb450c4821b8b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_18241ea632f28790e341c831acaad6f8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a74eea9ca21ada219b68c60e71f2fe0 |
| publicationDate | 2019-11-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2019219403-A1 |
| titleOfInvention | Passivation composition based on trivalent chromium |
| abstract | The present invention provides an aqueous passivation composition for the treatment of zinc or zinc alloy coatings, said composition having a pH of less than 3 and comprising: i) a source of trivalent chromium (Cr(lll)) ions; ii) at least one ohydroxycarboxylic acid represented by the general formula (I): R1CH(OH)COOH (I) wherein: R1 represents a hydrogen atom, a C1-C4 alkyl group, a C2-C6 alkenyl group, a C1-C6 alkoxy group, a C3-C6 cycloalkyl group or a C6-C10 aryl group; iii) phosphoric acid; iv) at least one water-soluble polyphosphonic acid or a water-soluble salt thereof, wherein said polyphosphonic acid has the general formula (II): in which: n is at least 2; and, Z is a connecting organic moiety having an effective valency of n, said polyphosphonic acid being characterized in that at least two phosphonic groups are separated by an alkylene bridge having 1 or 2 carbon atoms ( C 1 -C 2 alkylene ); and, v) at least one divalent metal cation, wherein said composition is characterized in that it is substantially free of nitrate and fluoride anions and is substantially free of hexavalent chromium (Cr(VI). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-7133889-B1 |
| priorityDate | 2018-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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