http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-816585-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14f86e164bb6ab1032c519b42ff81a64 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B41-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B41-00 |
| filingDate | 1956-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1959-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-816585-A |
| titleOfInvention | Production of azoic pigments |
| abstract | A process for the production of azo pigments comprises coupling a diazotized primary aromatic amine devoid of water-solubilizing sulphonic and carboxylic acid groups with an acylacetarylide, pyrazolone or aromatic hydroxy compound also devoid of such watersolubilizing groups, in an aqueous bath containing a water-soluble anionic surface active agent which is an organic sulphate or sulphonate of at least 9 carbon atoms, and then heating the aqueous bath at a temperature of about 90 DEG to 103 DEG C. until the azo pigment is produced in a readily filterable flocculent form, said surface active agent being employed in an amount ranging from about 25 to 175 g. per gram. mol. of azo pigment. Specified coupling components include aceto- or furoyl- or terephthaloyl-bis-acetic acid arylides, 1-phenyl- or -(p-chloro- or - nitro - phenyl) - 3 - methyl - 5 - pyrazolone, 1-phenyl - or - methyl - 5 - pyrazolone, phenols, 1 - and 2 - naphthols and 3 - hydroxy - 2-naphthoic or -anthroic acid acrylides. Specified primary amines include 4-chloro-2-nitroaniline, 4 - nitro - o - toluidine, 4 - benzamido - 2 : 5-diethoxy-aniline and 1-naphthylamine. Many other diazo and coupling components are specified. The diazo compound may be used in the form of a stabilized diazoamino compound, or a complex salt with, for example, zinc chloride or sulphate, cadmium chloride or tin tetrachloride or as a salt with an organic sulphonic acid such as benzenedisulphonic, a -naphthalenesulphonic and naphthalenetrisulphonic acids. The coupling component is dissolved in aqueous alkali which may also contain a water-soluble solvent such as ethyl or isopropyl alcohols and ethylene glycol or its monoethyl ether. Specified surface active agents are dodecylbenzene, isopropylnaphthalene and diisobutylnaphthalene sulphonates; N-oleoyl- or -tallowacyl- or -palmitoyl-N-methyl-taurine and N-tall oil acyl-N-ethyl-taurine; lauryl sulphate, tridecyl sulphate, sulphonated and sulphated castor oil, fatty acid esters of isethionic acid, diamyl- or dioctyl-sulphosuccinate and, preferably, formaldehyde naphthalene sulphonates. In examples a 5-diethylsulphamyl-o-anisidine is diazotized and to the aqueous solution thereof is added a polyoxyethylene ether of a higher fatty alcohol, a solution of 3-hydroxy-2-naphthoic acid-51-chloro-21 : 41-dimethoxyanilide containing sodium formaldehyde naphthalene sulphonate is slowly added thereto, the mixture is boiled and filtered and the pigment is finished by mixing it with an aqueous solution of the sodium formaldehyde naphthalene sulphonate, passing it over a roller mill and screening it. The azo pigments 2-nitro-p-toluidine or 6-nitro-m-toluidine --> acetoacetanilide and 4-chloro-o-toluidine-->4-chloro-2:5-dimethoxyacetoacetanilide are prepared similarly. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103450699-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103450699-B |
| priorityDate | 1955-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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Total number of triples: 75.