http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-547633-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9799ffcda2dbb45041a5ab0fd08dd5fe |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-38 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-38 |
| filingDate | 1941-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1942-09-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-547633-A |
| titleOfInvention | Photographic materials |
| abstract | 547,633. Photographic emulsions. KODAK, Ltd. March 3, 1941, No. 2880. Convention date, March 2, 1940. [Class 98 (ii)] A spreading-agent for incorporation in a sensitive emulsion or in any other predominantly aqueous solution of gelatine or other hydrophilic colloid to be applied to a photographic. support comprises a water-soluble mono-ester of a polyglycerol containing at least 4 glycerol residues with an aliphatic acid containing from 8 to 18 carbon atoms or with an alicyclic acid. From 0.002-0.2 per cent of the ester by weight may be employed. The ester may be a monoester of tetraglycerol, and may be an ester of lauric, myristic, pelargonic, lauroxyacetic, oleic, ricinoleic, naphthenic, abietic, hydroabietic, #-thiolaurylacetic, or dihydroxystearic acid. The sensitive emulsion or other solution containing the ester may be applied to the support and set by chilling, and before drying, a predominantly aqueous solution of gelatine or other hydrophilic colloid may be applied over the layer produced. If more than one predominantly aqueous solution of gelatine or other hydrophilic colloid is applied to the support, any or all of the layers may contain the ester. The incorporation of the ester may also improve the ageing qualities of the emulsion, increase its speed, and reduce storage fog. The emulsions are also more readily wetted by the developer. Other hydrophilic colloids referred to are watersoluble cellulose derivatives such as well-hydrolysed cellulose acetate, cellulose esters of lactic, glycollic, and other hydroxy-monocarboxylic acids, and salts of cellulose esters of dicarboxylic acids such as phthalic acid; polyvinyl alcohol such as hydrolysed polyvinyl acetate ; and watersoluble polyvinyl acetals. Specifications 531,579, 542,703, and 542,704 are referred to. |
| priorityDate | 1940-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.