Patent GB-558599-A (GB)
Title: Photographic articles and compositions
IPC: G03C1/043
Filed: 1942-07-09
Abstract: 558,599. Photographic materials and processing baths. DU PONT DE NEMOURS & CO., E. I. July 9, 1942, No. 9565. Convention date, June 30, 1941. [Class 98 (ii)] In the production or treatment of photographic films, plates, papers, and similar materials, there is incorporated in one or more layers of the materials or in a processing bath for the materials or there is applied to the surface of the materials, a condensation product of an alkylol cyanamide or alkoxyalkylol cyanamide, or polymer thereof, with a monocarboxylic acid containing at least two carbon atoms obtained by heating the reactants together at 110-160‹ C. The alkylol group may be the residue of ethylene glycol or of a poyethylene glycol obtained by removing one hydroxyl group therefrom, and the monocarboxylic acid may be a fatty acid containing at least nine carbon atoms. The condensation product may be incorporated in a lightsensitive emulsion layer, e.g. a gelatino silver halide emulsion layer, an antihalation, filter or antistatic layer, a subbing layer, or a lubricant coating. The support may be of paper, glass, cellulose derivative ,synthetic resin, or nylon. The condensation product may also be incorporated in developing solutions, including acid solutions of sodium hydrosulphite, and in fixing, bleaching, stop, dyeing, toning, and washing baths. The condensation product may be mixed directly with the materials of the layers or added in an alcohol-water bath or applied by beading or transfer rollers to the desired surface, or the continuous film may be made to pass between rollers, at least one of which acts as a transfer roller. Solutions containing the condensation product may be sprayed on the desired surface. From .05-1.0 per cent by weight may be incorporated in emulsions, from .001-.1 per cent in developers, from .5 to 1.0 per cent in impregnating solutions, and .05-1.0 per cent in coating solutions. The condensation product may be applied in aqueous solution or dispersion or in a solution in a volatile hydrocarbon or in an alcohol. In example 1, to a gelatino silver halide emulsion is added before coating on a cellulose nitrate support a 2 per cent ethanol solution of the condensation product from 2 mols of monoethylol cyanamide and stearic acid. The exposed material may be processed in a metolhydroquinone developer containing borax. In example 2, to an emulsion is added before coating on a cellulosic support the condensation product from monethylol cyanamide and palmitic acid. In example 3, to an emulsion sensitized with a thiocarbocyanine iodide is added before coating on a cellulose acetate support the condensation product from monoethylol cyanamide and lauric acid. In example 4, the condensation product from ethoxyethylol cyanamide and palmitic acid is added to the emulsion. In example 5, to a polyvinyl alcohol-silver halide emulsion containmg sensitizing compounds is added the condensation product of example 2. In example 6, an emulsion is coated with an antiabrasion coating comprising gelatin and the condensation product from monoethylol cyanamide and palmitic acid. In example 7, the back of a cellulose nitrate support is coated with an antihalation layer from a solution containing gelatin, nigrosine, and the condensation product from monoethylol cyanamide and stearic acid. In example 8, to a developing solution containing metol, hydroquinone, potassium carbonate, sodium sulphite, and potassium bromide is added the condensation product from monoethylol cyanamide and lauric acid. In example 9, to a developing solution containing p-phenylenediamine, glycine, and sodium sulphite is added the condensation product from ethoxyethylol cyanamide and acetic acid. In example 10, processed kinematograph film is coated with a lubricating solution containing the condensation product of example 1, ethylene glycol, ethyl alcohol, and water. In example 11, a reversal developer comprises phenylhydrazine, the condensation product of ethylol cyanamide, with lauric acid, and water. Other condensation products that may be used may be derived from monoisopropyl cyanamide, mono-n-butylol cyanamide, triethoxyethylol cyanamide, mono-2:3-dihydroxypropyl cyanamide, and mono-2-hydroxy-3-chloropropyl cyanamide, and their reaction products with alkylene oxides. Acids include acetic, propionic, butyric, caproic, heptoic, caprylic, nonylic. capric, and margaric acids and mixtures thereof, and mixtures e g. benzoic and o-toluic acids and coconut oil fatty acid. Mixtures of two or more condensation products may be used. Other wetting agents, e.g. the higher alkyl betaines of the C -and N- types disclosed in Specification 523,478, saponin, and the wetting agents of Specifications 547,632, 547,633, 547,740, 548,019, 548,347 and 548,532. The condensation products may also be used in the treatment and processing of silver halide-collodion layers or layers of polymeric substances containing silver halides or in bichromated-colloid and diazotype layers, or in emulsion layers containing salts of leuco bases and esters of leuco bases. The condensation products impart antistatic properties. Specifications 522,161 and 540,376, [Group IV] , also are referred to.