Patent GB-393408-A (GB)
Title: A process of dyeing and printing
Filed: 1932-05-09
Abstract: Insoluble azo-dyestuffs are made on the fibre by first treating the material with an azo-dyestuff preparation, padding in an acid solution and developing by passing over heated drying cylinders or through a heated chamber or by drawing through a container filled with steam.  The process may be used for printing with azo-preparations alone or together with printings by means of ester salts of leuco vat-dyestuffs, and to the production of coloured resists under dyeings from aniline black preparations and/or from ester salts of leuco-vat dyestuffs.  Azo-dyestuff preparations specified are those containing diazoamino compounds (see Specifications 320,324, 324,041 and 334,529, [all in Class 2 (iii), Dyes &c.], or nitrosamines (see Specifications 9102/14, [Class 15 (ii), Dyeing, Processes &c. for], 6663/15, 217,594, 328,383, [all in Class 2 (iii), Dyes &c.], and 340,534) and the usual coupling components free from sulphonic carboxyl groups. The acid solution may be one containing one or more organic acids, e.g. acetic, formic, glycollic or oxalic acids, or phosphoric acid, or one or more easily dissociated metal salts of inorganic acids, e.g. sulphates or chlorides of magnesium, zinc or aluminium, or one or more salts which are capable of yielding acid, e.g. ammonium salts of organic acids, or mixtures of these substances.  The following examples are given: (1) a fabric is printed with a mixture of the diazoamino compound from 4-chloro-2-toluidine and 4-sulpho-2-aminobenzoic acid with diacetoacetyl-o-tolidine, dried, padded on the reverse side with one of the acid solutions specified and thereupon directly dyed on a cylinder drying machine and finished; (2) a fabric is printed with a mixture of the diazoamino compound from 1-amino-4-benzoylamino2 : 5-dimethoxybenzene and n-butylaminoacetic acid and treated as in (1); (3) a fabric is printed with a preparation containing the nitrosamine sodium salt of 5-chloro-2-anisidine, sodium hydroxide, sodium acetate and diacetoacetyl-o-tolidine or 2<1> : 3<1>-oxynaphthoyl-o-anisidine and finished as above; (4) the material is printed with a mixture containing the diazoamino compound from 4-chlor-2-toluidine and 4-sulpho-2-aminobenzoic acid with the sodium salt of 2<1> : 3<1>-oxynaphthoyl-o-phenetidine, dried, padded with an aniline black liquor containing aniline salt, aniline oil, tragacanth, potassium ferrocyanide, sodium chlorate, acetic and formic acids, dried at once on a cylinder drying machine, steamed, treated in an acid chromate bath, rinsed and soaped; (5) cotton or viscose is printed with a preparation containing the nitrosamine sodium salt of 2 : 5-dichloraniline, sodium hydroxide and acetate and 2 : 3-hydroxynaphthoyl-o-anisidine, dried, padded with the aniline black liquor and finished as in (4); (6) the material is padded with a solution containing the esterified leucocompound of the formula:-- <FORM:0393408/IV/1> (from the corresponding leuco-vat dye, chlorosulphonic acid and pyridine), ethylenethiodiglycol, sodium nitrite, ammonia and tragacanth, dried, printed with a resist paste containing the dyestuff preparation prescribed in (1), caustic soda, alcohol, tragacanth, zinc white and sodium thiosulphate, dried, padded with a solution of oxalic and formic acids and Glauber's salt, and directly dried on a drying cylinder machine; (7) the material is padded as in (6), printed with a resist paste containing the nitrosamine sodium salt of 5-chloro-2-anisidine, sodium hydroxide and acetate and diacetoacetyl-o-tolidine and finished as in (6); (8) the material is padded with a solution containing the sodium salt of the sulphuric acid ester of leuco 4 : 5 : 7-4<1> : 5<1> : 7<1>-hexabromindigo, ethylenethiodiglycol, tragacanth, sodium chlorate, ammonium vanadate, dried, printed with a resist paste containing 2 : 3-oxynaphthoyl-o-anisidine and the diazoamino compound from 4-chloro-2-anisidine and methylaminoacetic acid, dried, padded with a solution containing acetic and formic acids and aluminium sulphate and developed as in (6); (9) the material is padded as in (8), dried, printed with a resist paste containing the nitrosamine sodium salt of 5-chloro-2-toluidine and 2 : 3-oxynaphthoyl-o-toluidine and finished as in (8); (10) the material is printed with a resist paste containing the azo-components in (4), dried, padded with a solution containing the ester salt of the leuco-vat dye in (6), ethylenethiodiglycol, tragacanth, ammonia, acetic acid, ammonium oxalate, sodium chlorate and ammonium vanadate, dried on a cylinder drying machine to develop the azo dye, and steamed to develop the vat dye; (11) the material is printed with a resist paste containing the nitrosamine sodium salt of 5-chloro-2-anisidine and 2 : 3-oxynaphthoyl-o-anisidine, dried, padded with a solution as in (10) and similarly finished; (12) the following two printing colours are printed on the material in different designs: (a) a mixture of the diazoamino compound from 4-chloro-2-toluidine and 4-sulpho-2-aminobenzoic acid with the sodium salt of 2 : 3-oxynaphthoyl-o-phenetidine, and (b) the sulphuric acid ester of the leuco-compound of dimethoxydibenzanthrone, sodium nitrite, ethylenethiodiglycol, ethyleneglycol, dioxyethylene glycolmonomethylether, starch tragacanth and urea and after drying the printed material is padded in a solution containing oxalic and formic acids and Glauber's salts and dried on a cylinder drying machine; (13) a mixture of the nitrosamine sodium salt from 2 : 5-dichloraniline, sodium hydroxide and acetate and 2 : 3-oxynaphthoylaniline is used as in (12) instead of the diazoamino preparation; (14) material is printed in different designs with (a) the dyestuff preparation containing 2<1> : 3<1>-oxynaphthoyl-p-anisidine and the diazoamino compound from 4 : 6-dichloro-2-toluidine and 4-sulpho-2-aminobenzoic acid, (b) a paste containing the sulphuric acid ester of the leucocompound of 5 : 7 : 5<1> : 7<1>-tetrabromindigo, ethylenethiodiglycol, starch tragacanth, sodium chlorate and ammonium vanadate, dried, padded with a solution of acetic and formic acids and aluminium sulphate and finally dried on heated cylinders or in a heated chamber; (15) a mixture of the nitrosamine sodium salt of 4-chloro-2-toluidine with the sodium salt of 2 : 3-oxynaphthoyl-o-toluidine is used instead of the diazoamino preparation in (14); (16) white cotton material is printed with the pastes containing the following: (a) the azodyestuff preparation in (14) and zinc white, (b) the sulphuric acid ester of the leuco-compound of 5 : 7 : 5<1> : 7<1>-tetrabromindigo and zinc white, dried, padded with aniline black liquor, immediately dried on a cylinder drying machine, steamed and treated with a solution containing sodium nitrite, formic and sulphuric acids; (17) the nitrosamine printing colour of (13) is used instead of the diazoamino compound in (16); sodium bichromate may also be used in the oxidizing bath instead of sodium nitrite; (18) material is printed in different designs with pastes containing (a) diacetoacetyl-o-tolidine and the diazoamino compound of 4-chloro-2-toluidine and 4-sulpho-2-aminobenzoic acid, the sulphuric ester of the leuco-compound of dimethoxydihydrodibenzanthrone (obtained by alkali fusion of Bz2-methoxybenzanthrone) and zinc white, (b) the diazoamino compound from 4-chloro-2-anisidine and methylaminoacetic acid, 2 : 3-oxynaphthoyl-o-anisidine, zinc white and the usual additions, dried and treated as in (16) and (17); (19) the following nitrosamine colours are used instead of the diazoamino preparations in (18): (a) the nitrosamine sodium salt 4-chloro-2-anisidine, sodium hydroxide and acetate, and diacetoacetyl-o-tolidine, (b) the nitrosamine sodium salt of 2 : 5-dichloraniline, sodium hydroxide and acetate, and the sodium salt of 2 : 3-oxynaphthoyl-aniline.  Specifications 211,772 and 211,814, [both in Class 2 (iii), Dyes &c.], also are referred to.