http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-750031-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/G03C1-83 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-83 |
| filingDate | 1954-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-750031-A |
| titleOfInvention | Photographic elements containing antihalation or filter layers |
| abstract | Yellow dyes are the Schiff's bases from an o-hydroxy aromatic aldehyde and a 1-naphthylamine substitute in the 8-position by a halogen, sulpho, cyano, alkoxy, alkyl, carboxy, or nitro group. They are prepared by adding to 1 mol of the aldehyde in a minimum quantity of boiling acetic acid, 3 mols of pyridine and less than 1 mol of the 1-naphthylamine. After boiling for 3-5 minutes the mixture is poured into a large volume of ether and the precipitated dye filtered off. The aldehyde may be potassium - 5 - formyl - 6 - hydroxynaphthalene - 2 - sulphate, salicyl aldehyde, 2-methyl-4. 6-dihydroxybenzaldehyde, 2-hydroxy-1-naphthaldehyde, 2-formyl - 3 - hydroxyquinoline, 1 - formyl - 2-hydroxy - 6-stearoylaminonaphthalene - 4 - sulphonic acid, 2 - hydroxy - 5 - methylbenzaldehyde, 2 - hydroxy - 1 - formyl - naphthalene - 6 - potassium sulphonate, 2 - 5 - dihydroxybenzaldehyde, 1 - formyl - 2 - hydroxynaphtnalene - 6 - carboxylic acid and 2 - hydroxy - 3 - dodecylaminobenzaldehyde. The naphthylamine may be 1-aminonaphthalene - 4, 8 - disulphonic acid, 1 - aminonaphthalene - 8 - sulphonic acid, 1 - amino - 3 - carboxynaphthalene - 8 - sulphonic acid, 1 - amino - 8 - chloronaphthalene - 6 - sulphonic acid, 8 - nitro - 1 - naphthylamine, 1 - amino - 8 - naphthoic acid, 1 - amino - 8 - naphthonitrile, 8 - ethoxy - 1 - naphthylamine, 8 - methyl - 1-naphthylamine, 8 - bromo - naphthylamine, 1 - amino - 5 - acetylaminonaphthalene - 8-sulphonic acid, 1 - aminonaphthalene - 3, 6 8 - trisulphonic acid and 8 - chloro - 1 - naphthylamine. Specification 747,682 and U.S.A. Specification 2,695,233 are referred to. |
| priorityDate | 1953-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 61.