http://rdf.ncbi.nlm.nih.gov/pubchem/patent/PL-159388-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B33-28 |
| filingDate | 1989-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1992-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | PL-159388-B1 |
| titleOfInvention | Method for the production of dyeing agents for brown leather with a drain and yellow color PL |
| abstract | Method for the production of coloring agents for brown leather with a yellow shade, being multi-component mixtures and having the characteristics of Uniform mixtures, which as main components contain azo dyes of the formulas 1,2, 3.4 1 5 next to azo compounds of the formulas 6, 7,81 9 and other colored compounds with an unidentified structure, while the dyes included in the agents may be partially complexed with iron, by subsequent conjugation with resorcinol of the diazonium compounds: 1-amino-8-hydroxynaphthalene disulfonic acid 3.6. 4-nitroaniline and 4-nitro-2-aminophenol in an alkaline environment, and then an optional treatment of the obtained dye mixture with ferrous salts, characterized in that 1-amino-8-hydroxynaphthalenedisulfonic acid-3,6 is diazotized. preferably in the presence of dispersing agents and / or wetting agents, using it in an amount corresponding to 1.5 - 1.6 moles, especially 1.54 - 1.56 moles for the total amount of 1 mole of resorcinol later used, and to the resulting gingiva suspension 0.40-0.55 moles, preferably 0.46-0.47 moles of resorcinol, and after mixing, the pH is adjusted to 10.5-11.0 by rapid addition of sodium liquor, and then stirred at a temperature below 10 ° C for 20 - 40 minutes and 1 mol. Is introduced into the reaction mixture. preferably 0.54 - 0.53 mol of resorcinol (the total amount of resorcinol used for coupling is 1 mol per 1.5 - 1.6 mol of 1-amino-8-hydroxynaphthalene-disulfonic acid-3.6) and the coupling is continued at a pH above 11.5, especially at pH = 12.0 - 12.5, and after the first coupling to the obtained solution was completed (43) The application was announced: 01.10.1990 BUP 20/90 (45) The patent was granted on: 31.12.1992 WUP 12/92 pattern 1 PL |
| priorityDate | 1989-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.