http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-531246-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| filingDate | 1939-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1941-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-531246-A |
| titleOfInvention | Improvements in and relating to colour forming developers and processes of colour development |
| abstract | 531,246. Photographic colour development. KODAK, Ltd. (Eastman Kodak Co.). March 31, 1939, Nos. 10130/39, 18746/39, 7376/40 and 7377/40. Drawings to Specification. [Class 98 (ii)] [Also in Group IV] A process of colour development comprises developing a reducible silver salt image with an aromatic amino-developing agent in the presence of a colour coupler having the general formula where X is an aryl group connected to an arylacetamino, cyanacetamino, acylacetyl, or cyanaracetyl group and Y and Z are hydrogen or a monovalent organic substituent such as alkyl. aryl, or a homocyclic or heterocyclic ring and where Y and Z may be the same or different and, when both are attached to the nitrogen atom, may be members of a common ring structure such as a piperidine ring. The colour coupler may be a sulphonyl derivative of a secondary amine. The colour coupler may be resistant to diffusion, such as 4-(p-laurylbenzenesulphonamino)#-benzoylacetanilide or the compounds produced by reacting the sulphochlorides of colour couplers with high molecular aminocompounds such as polyaminostyrene or gelatin. Numerous examples of colour couplers are given. Specifications 427,472, 427,516, 427,518,427,520, 440,032, 440,089, 447,092, 458,664, 499,185, 500,611, 500,718, 500,826, 503,752, 503,814. 503,817, 503,818, 503,819, 503,820, 503,821, 503,827, 503,939, 503,940, 524,154, 524,554, 524,555, and 531,312 are referred to. p-Benzoyl-acetamino benzenesulphonyl chloride is prepared by the reaction of benzoylacetanilide with chlorosulphonic acid. 2-cyanacetylcoumarone-5-sulphonyl chloride, cyanacetyl diphenyleneoxidesulphonyl chloride, α- or #- cyanacetylnaphthalenesulphonyl chloride, cyanacetyldiphenylsulphonyl chloride, p-anisoylacetaminobenzenesulphonyl chloride, 2-acetylnaphthalenesulphonyl chloride, p-acetaminobenzenesulphonyl chloride, and 1-carbethoxvnaphthol-4-sulphonyl chloride, are similarly prepared Sulphonamides may be prepared by condensing the above sulpho-chlorides with ammonia or primary or secondary amines in acetic acid solution using sodium acetate or excess of the amine as the condensing agent. 2-Acetylnaphthalenesulphonyl chloride may be condensed with ammonia or a primary or secondary amine, and the sulphonamide brominated to give the #-bromacetyl derivative and this derivative reacted with potassium cyanide to give the #-cyanacetyl compound. p-Acetaminobenzenesulphonyl chloride may be converted into a sulphonamide as above, hydrolysed, and reacted with ethyl benzoylacetate to give the benzoylacetamino derivative. Specification 527,493 also is referred to. |
| priorityDate | 1939-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.