GB554998A - Improvements in photographic light sensitive diazotype materials - Google Patents

Abstract

554,998. Photographic diazotype material. KODAK Ltd. Oct. 15, 1941, No. 11332/43. Convention date Oct.15,1940. Divided out of 554,921. [Class 98 (ii)] Diazotype material comprises a support carrying a light sensitive compound which is a diazo derivative of a compound of the general formula wherein Q is oxygen or CH 2 and R is alkyl or alkoxy. The phenyl group may also contain one or more nuclear monovalent substituents, e.g. methyl, ethyl, n- or iso-propyl, n- or iso-butyl, methoxy, ethoxy, n- or iso-propoxy, n- or iso-butoxy, or sulphonic acid groups, or chlorine, bromine, iodine, or fluorine atoms. The diazo compounds couple with separate coupling components or with their own partial decomposition products in the presence of alkaline substances. The support may be paper, cloth, organic cellulose derivative, synthetic resin (e.g. polyvinyl alcohol), regenerated cellulose, glass or metal, and the sensitizing materials may be applied by coating, dipping, brushing, spraying, or dusting. The diazo compounds are applied from solutions containing them, a solution of a coupling component being applied separately, or the diazo compound and coupling component may be dissolved in a common solvent, usually with an acidic compound as stabilizer. A thickening or emulsifying agent (e.g. gelatin, polyvinyl alochol, gum tragacanth, or a higher fatty acid glycerylsulphate) may be added to the solution or solutions. In example 1, paper is treated with a solution of diazotized N-(3-methyl-4-aminophenyl)- morpholine sulphate and then with a solution of #- naphthol in ethyl alcohol. The sensitized paper is exposed behind a positive to a quartz mercury vapour arc, and developed in an atmosphere of ammonia. In example 2, the sensitizer is diazotized N-(3-methoxy-4-aminophenyl)-morpholine, and the coupling component 2:4-dichloro-1-naphthol. In example 3, the sensitizer is N-(3-methyl-4-aminophenyl)-poperidine, and the coupling component phloroglucinol. Other coupling components are as described in Specification 554,921. Specification 538,869 also is referred to. The aminophenylpiperidine compounds are prepared by reducing the corresponding nitrophenylpiperidine compounds. The aminophenylmorpholine compounds are prepared by condensing the appropriate aniline compound with a haloalkyl ether such as #:#<SP>1</SP>-dichlorodiethyl ether or symm.-dichloro-di-isopropyl ether.