http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-436096-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/C09B19-005 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B19-00 |
| filingDate | 1934-04-04^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1935-10-04^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-436096-A |
| titleOfInvention | The manufacture of dyestuffs of the gallocyanine series |
| abstract | Gallocyanine dyes are prepared by condensing gallic acid or a derivative thereof such as gallamide, gallic acid arylamides, gallic acid esters or pyrogallic acid, with nitroso compounds of secondary or tertiary aromatic amines of the formula <FORM:0436096/IV/1> wherein R stands for hydrogen, alkyl or substituted alkyl and "alk" for an alkyl group of at least three carbon atoms. In examples: (1) gallic acid is condensed with nitrosobutylphenylaminopropane sulphonic acid (prepared by reacting propylene oxide with butylaniline, converting the b -oxypropylaniline to the sulphuric ester and this in turn to the sulphonic acid by means of sodium sulphite and nitrosating the product); printed as a chromium lake it yields blue shades; (2) gallamide is condensed with nitrosobutylphenylamino - b - oxypropane - g - sulphonic acid (prepared by reacting chloroxypropane sulphonic acid with butylaniline and nitrosating the product) (dyes green-blue). The Specification as open to inspection under Sect. 91 relates to the manufacture of the above gallocyanine dyes by methods known per se but this subject-matter does not appear in the Specification as accepted. |
| priorityDate | 1933-04-05^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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