http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-361511-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B63-005 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B63-00 |
| filingDate | 1930-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1931-11-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-361511-A |
| titleOfInvention | Manufacture of colour lakes |
| abstract | Azo-dyestuff lakes are made by treating the azo dyestuff 2-amino-4-sulpho-1-benzoic acid --> b -naphthol with a suitable salt of an alkaline earth metal, or by making the dyestuff in presence of a quantity of such a salt sufficient to convert the dyestuff into the lake. The lakes have red tints and are fast to light. In examples (1) the disodium salt of the dyestuff in aqueous solution is run into a solution of calcium and sodium chlorides to form the calcium lake, (2) and (3) strontium and barium chlorides are used instead of calcium chloride, (4) 2-amino-4-sulpho-1-benzoic acid is diazotized using calcium nitrite and coupled with b -naphthol in the presence of milk of lime or chalk to form the di-calcium salt. The lakes may be produced in presence of a distributing agent, e.g. Turkey red oil as well as in the presence of substrata. |
| priorityDate | 1930-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.