Patent GB-431649-A (GB)
Title: Process for colouring organic solvents, laquers, fats, oils, resins, waxes and products obtained therefrom
IPC: C11C5/00
Filed: 1934-01-12
Abstract: Azo dyes.--Organic solvents, e.g. benzine or benzene, lacquers, fats, oils, resins and waxes are coloured in clear shades, fast to sublimation, by incorporating therein an azo dyestuff obtainable by coupling a diazo compound of the benzene series, containing no nitro, free sulphonic or free carboxylic group, with a 4-oxy-2-quinolone substituted at the N-atom by an aliphatic residue.  A table is given showing the increased solubilities in benzene and in linseed oil of the dyestuffs, aniline --> N-methyl-4-oxy-2-quinolone, aniline --> N-butyl-4-oxy-2-quinolone and 2 : 5-dichloraniline --> N-butyl-4-oxy-2-quinolone, as compared with the solubilities of the dyestuffs, aniline --> 2 : 4-dioxyquinoline, 4-nitraniline --> N-methyl-4-oxy-2-quinolone and 4-nitraniline --> N-butyl-4-oxy-2-quinolone.  The following examples are specified. (1) 0,02 per cent of the dyestuff, aniline --> N-(n-butyl)-4-oxy-2-quinolone, is dissolved in a mixture of equal parts of stearic acid and paraffin wax to colour it a clear greenish yellow.  (2) 0,5 per cent of the dyestuff, the p-toluenesulphonic ester of 2-aminophenol --> N-(n-butyl)-4-oxy-2-quinolone, is dissolved in a cellulose ether varnish to colour it a clear greenish yellow.  (3) 0,2 per cent of the dyestuff, the cyclohexyl ester of 3-aminobenzoic acid --> N-methyl-4.oxy-2-quinolone, is dissolved in a nitrocellulose varnish to colour it a clear greenish yellow (4) 0,4 per cent of the dyestuff, aniline --> N-methyl-4-oxy-2-quinolone, is dissolved in a spirit varnish to colour it yellow; similar colourings are obtained with the substitution of halogenanilines for the aniline; somewhat redder colourings are obtained with the substitution for the aniline of toluidines, xylidines, &c. Specification 327,394, [Class 2 (iii)], is referred to.ALSO:Organic solvents, e.g. benzine or benzene, lacquers, fats, oils, resins, and waxes are coloured in clear shades, fast to sublimation, by incorporating therein an azo dyestuff obtainable by coupling a diazo compound of the benzene series, containing no nitro, free sulphonic or free carboxylic group, with a 4-oxy-2-quinoline substituted at the N-atom by an aliphatic residue.  A table is given showing the increased solubilities in benzene and in linseed oil of the dyestuffs, aniline --> N-methyl-4-oxy-2-quinoline, aniline --> N-butyl-4-oxy-2-quinoline and 2 : 5-dichloraniline --> N-butyl-4-oxy-2-quinoline, as compared with the solubilities of the dyestuffs, aniline --> 2 : 4-dioxyquinoline, 4-nitraniline --> N-methyl-4-oxy-2-quinolone and 4-nitraniline N-butyl-4-oxy-2-quinolone.  The following examples are specified. (1) 0,02 per cent of the dyestuff, aniline --> N-(n-butyl)-4-oxy-2-quinolone, is dissolved in a mixture of equal parts of stearic acid and paraffin wax to colour it a clear greenish yellow.  (2) 0,5 per cent of the dyestuff, the p-toluenesulphonic ester of 2-aminophenol --> N-(n-butyl)-4-oxy-2-quinolone, is dissolved in a cellulose ether varnish to colour it a clear greenish yellow.  (3) 0,2 per cent of the dyestuff, the cyclohexyl ester of 3-aminobenzoic acid --> N-methyl-4-oxy-2-quinolone, is dissolved in a nitrocellulose varnish to colour it a clear greenish yellow.  (4) 0.4 per cent of the dyestuff, aniline --> N-methyl-4-oxy-2-quinolone, is dissolved in a spirit varnish to colour it yellow; similar colourings are obtained with the substitution of halogenanilines for the aniline; somewhat redder colourings are obtained with the substitution for the aniline of toluidines, xylidines, &c. Specification 327,394, [Class 15 (ii)], is referred to.