Patent GB-458501-A (GB)
Title: Process for producing fast tints on vegetable fibres
IPC: D06P3/64
Filed: 1935-03-14
Abstract: Dyeings specially fast to water are obtained upon vegetable fibres by treating the fibres in an aqueous bath containing in a finely-subdivided, preferably colloidal, form a complex metal compound of a direct cotton azo dyestuff, the sodium salt of which compound is sparingly soluble or insoluble in the baths customarily used for dyeing with direct cotton azo dyestuffs.  The dyeing may be effected in presence of a dispersing, wetting or emulsifying agent or of ammonia or an amine.  Specified assistants are pyridine, alkylamines, ethanolamines, cyclohexylethanolamines, butylethanolamines, alkylated benzene- or naphthalene-sulphonic acids, alcohols, e.g. glycerol, alcohol sulphonates, soluble condensation products of amines with higher fatty acids or with ethylene oxide, oxyoleic acids, sulphoricinates, glue, sulphite cellulose liquor, dextrin, albumen degradation products such as protalbinic or lysalbinic acid, polymerized aldehydes and soluble degradation products of cellulose.  In many cases it is advantageous to develop the dyeings in a bath at 50--75 DEG  C. containing soap or soap and sodium carbonate.  The following examples are specified:--(1) cotton is entered into an aqueous bath at 30--40 DEG C. containing sodium carbonate and a colloidal solution of the copper compound of the dyestuff, 4 : 4<1>-diaminodiphenylurea \sQ salicylic acid (2 mols.), such solution being obtained by mixing with water a viscid mass produced by heating an aqueous paste of the compound with triethanolamine and evaporating a part of the water, the dyebath is then heated during 30 minutes to 90--100 DEG  C., sodium sulphate is added and dyeing is continued for 30--40 minutes, the cotton being then rinsed, soaped, rinsed and dried; the triethanolamine may be replaced by ethylene diamine or polyalkylene diamines and the dyestuff by the copper compound of one of the following, viz. 4 : 4<1>-diaminostilbene-3 : 3<1>-dicarboxylic acid \sQ acetoacetanilide (1 mol.) and acetoacet-2<1>-carboxyanilide (1 mol.), 2 mols of (p-aminosalicylic acid --> cresidine) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylurea, 2 mols. of (p-aminosalicylic acid --> aminohydroquinonedimethylether or cresidine) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine, p-aminosalicylic acid --> cresidine --> 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine \sM aminohydroquinonedimethylether \sM p-aminosalicylic acid, or 2 mols. of (p-aminosalicylic acid --> 2-methoxy-1-aminonaphthalene or aminohydroquinonedimethylether) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylurea; (2) cotton is entered into a boiling aqueous bath containing sodium carbonate and a finely ground paste of the copper compound of the dyestuff, 2 mols. of (p-aminosalicylic acid --> aminohydroquinone dimethylether) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine, boiling is continued for 1\ba1/2\be hours with or without an addition of sodium sulphate after 1 hour and the cotton is then rinsed, soaped, rinsed and dried; sulphite cellulose liquor may advantageously be present in the dyebath; (3) cotton is handled for 1--1\ba1/2\be hours in a boiling aqueous bath containing sodium carbonate, Marseilles soap and the finely subdivided copper compound of the dyestuff, 2 mols. of (p-aminosalicylic acid --> cresidine) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine, sodium sulphate is added, boiling is continued for \ba1/2\be hour and the cotton is then rinsed, soaped, rinsed and dried; the Marseilles soap may be replaced by turkey red oil, sulphite cellulose liquor, sodium 1-isopropylnaphthalene-3-sulphonate or lauryl alcohol-sulphonate; (4) cotton is entered into an aqueous bath at 40 DEG  C. containing sodium sulphate and a colloidal solution of the copper compound of the dyestuff, 2 mols. of (p-aminosalicylic acid --> aminohydroquinone diethyl ether) \sQ 5 : 5-<1> dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine, such solution being obtained by adding a mixture of the copper compound, glycocoll and sodium carbonate to boiling water, the dyebath is then heated during \ba1/2\be hour to 95 DEG  C and so maintained for 1 hour and the cotton is then rinsed, soaped, rinsed and dried; (5) boiled-off jute yarn, wood-bast fibre or straw plait is treated for 1 hour in a boiling aqueous bath containing sodium sulphate and a colloidal solution, obtained as in (1), of the copper compound of the dyestuff, 4 : 4<1>-diaminodiphenylurea \sQ salicylic acid (2 mols.); (6) a colloidal solution of the copper compound in (3) dispersed with triethanolamine is mixed with a cellulose paper pulp, aluminium sulphate and rosin size are added and the mass is worked up into paper; (7) an aqueous solution of the dyestuff, 2 mols. of (p-aminosalicylic acid --> aminohydroquinonedimethylether) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine is mixed with copper glycocollate solution at 70--80 DEG  C. and the colloidal solution of the copper compound thus obtained or obtained by salting out, drying and mixing with water is similarly employed for colouring a cellulose paper pulp; (8) jute yarn or coconut fibre is treated for 1 hour in an aqueous bath at 95 DEG  C. containing sodium sulphate and a colloidal solution of the copper compound of the dyestuff obtainable according to Specification 348,283 by condensation of 1 mol. of dinitrostilbene disulphonic acid with 2 mols. of (p-aminosalicyclic acid --> 1 : 3-phenylenediamine) in presence of caustic soda, such solution being obtained by boiling the parent dyestuff with copper glycocollate solution; (9) cotton is entered into an aqueous bath at 30--40 DEG  C. containing sodium carbonate and a mixture obtained by grinding the copper compound of the dyestuff, 4 : 4<1>-diaminodiphenylurea \sQ salicylic acid (2 mols.), or the copper compound in (2) or (3) with the sodium salt of the sulphonated condensation product from benzyl chloride and naphthalene, the bath is brought to the boil during \ba1/2\be hour, sodium sulphate is added, the dyeing is continued for 1 hour at 95--100 DEG  C. and the cotton is then washed and dried; (10) cotton is similarly dyed with the copper compound in (3) added to the bath in the form of an aqueous paste, or a dried and ground product therefrom, obtained by suspending an aqueous press cake of the compound in water, adding an emulsifier prepared from monopole soap and glue, and heating with stirring; the emulsifier may be replaced by a pyridine solution of castor oil sulphonate; (11) cotton is similarly dyed with the copper compound of the dyestuff, 4 : 4<1>-diaminodiphenylurea \sQ salicylic acid (2 mols.), added to the bath in the form of a mixture of an aqueous suspension of the compound with the sulphonated condensation product from stearic acid and p-phenylenediamine; the condensation product may be replaced by the above emulsifier from glue and monopole soap or by sodium isopropylnaphthalenesulphonate; (12) cotton is similarly dyed with the copper compound of the dyestuff obtainable according to Specification 348,283 by condensation of dinitrostilbenedisulphonic acid with 4-amino-acetanilide --> salicylic acid in presence of caustic soda, such compound being added to the bath in the form of a dispersion obtained by adding dithioglycol to an aqueous paste of the compound, diluting with water and stirring for 10 hours; (13) cotton is similarly dyed with the copper compound of the dyestuff, 3 : 3<1>-diamino-4 : 4<1>-dioxydiphenylsulphone \sQ 2 mols. of (5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-di naphthylamine \sM 5-nitro-2-aminophenol), such compound being added to the bath in the form of a dispersion obtained by grinding it with the sodium salt of the diamyl ester of sulphophthalic acid (cf. Specification 371,144) and boiling with water; (14) cotton is entered into an aqueous bath at 30--40 DEG  C. containing sodium carbonate, sodium sulphate, the sodium salt of the diamyl ester of sulphophthalic acid as dispersator and the nickel or cobalt compound of the dyestuff, 5-nitro-2-aminophenol --> 5 : 5<1>-dioxy-7 : 7-diulpho-2 : 2<1>-dinaphthylamine \sM aniline \sM p-aminosalicylic acid, the bath is brought to the boil during \ba1/2\be hour and so maintained for \ba3/4\be--1 hour and the cotton is then rinsed and dried; the dispersator may be replaced by the sodium salt of the sulphonated condensation product from benzyl chloride and naphthalene or the emulsifier from monopole soap and glue; (15) cotton is similarly dyed with the cobalt compound of the dyestuff, 2 mols. of (p-aminosalicylic acid --> cresidine) \sQ 5 : 5<1>-dioxy-7 : 7<1>-sulpho-2 : 2<1>-dinaphthyl urea; (16) cotton is dyed as in (9) with the copper compound of the dyestuff obtainable according to Specification 348,283 by condensation of 1 mol. of dinitrostilbenedisulphonic acid with 2 mols. of (p-aminosalicylic acid --> 1 : 3-phenylenediamine) in presence of caustic soda, such compound being added to the bath in a colloidally soluble form made by grinding it with sodium glycocollate; (17) cotton is dyed with a mixture of the copper and nickel compounds of the dyestuff, 2 mols of (p-aminosalicylic acid --> aminohydroquinonedimethylether) \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylamine, such mixture being produced in the bath in a colloidal soluble form, prior to entering the cotton, by adding to the hot dye-bath, containing sodium carbonate and sodium sulphate, a ground mixture of the sodium salt of the parent dyestuff with copper glycocollate and nickel glycocollate; (18) cotton is dyed as in (14) with a mixture of the nickel and cobalt compounds of the dyestuff, 2 mols. of salicylic acid-azo-aniline \sQ 5 : 5<1>-dioxy-7 : 7<1>-disulpho-2 : 2<1>-dinaphthylurea, such mixture being added to the dyebath in admixture with Marseilles soap and glue; (19) cotton is dyed as in (17) with a mixture of the nickel and cobalt compounds of the