Patent GB-452482-A (GB)
Title: Improvements in printing textile materials
IPC: D06P1/12
Filed: 1935-02-21
Abstract: Azo dyes, forming on the material; printing.--Printings of insoluble azo dyestuffs are obtained by printing the fibre with a paste containing a substantive coupling component, a water-soluble diazoamino compound from an aromatic diazo compound, and a compound capable of splitting off acid when steamed, and thereupon developing the dyestuff by steaming.  Specified substantive coupling components are naphthols, arylides of 2 : 3-oxynaphthoic acid, pyrazolones, arylides of b -keto-carboxylic acids, e.g. of acetoacetic, benzoylacetic, terephthaloyldiacetic acids, diacylacetylarylamines, e.g. di-(acetoacetyl)-benzidine or -tolidine and arylides of 2 : 3-oxyanthracenecarboxylic, o-oxycarbazolecarboxylic and o-oxybenzocarbazolecarboxylic acids. Specified water-soluble diazoamino compounds are those described in Specifications 320,324, 329,353, [both in Class 15 (ii)], 427,803, 433,878, and 443,222 and those in which the solubility is due to the presence of several hydroxy groups, e.g. as obtainable from a diazotized amine and dipropanediolamine or an alkylglycamine.  The following examples are specified: (1) a fabric is printed with an aqueous paste containing caustic soda, the sodium salt of sulphonated castor oil, wheat starch tragacanth thickening, a mixture of the diazoamino compound from 5-chloro-2-methoxyaniline and sarcosine with the 4<1>-chloranilide of 2 : 3-oxycarbazolecarboxylic acid and, as the compound yielding acid, diethylsuccinate, diethyl malonate or diethyl thiodiglycollate, and the print is dried, steamed for 10--30 minutes, rinsed, soaped at the boil, rinsed and dried; (2) a fabric is similarly printed with the use, for colouring, of a mixture of the diazoamino compound from 5-chloro-2-methylaniline and 4-sulpho-2-aminobenzoic acid with the 2<1>-phenetidide of 2 : 3-oxynaphthoic acid and, as the compound yielding acid, of ethyllevulinate; (3) a fabric is similarly printed with the use, for colouring, of a mixture of the diazoamino compound from 5-methyl-4-benzoylamino-2-methoxyaniline and sarcosine with the anilide of 2 : 3-oxynaphthoic acid and, as the compound yielding acid, of chloralisovaleramide in dilute alcoholic soda; (4) a fabric is printed with an aqueous paste containing caustic soda, the sodium salt of sulphonated castor oil, thiodiglycol, wheat starch tragacanth thickening, a mixture of the diazoamino compound from 4 - benzoylamino - 2 : 5 - diethoxyaniline and sarcosine with the 2<1>-toluidide of 2 : 3-oxyanthracenecarboxylic acid and, as the compound yielding acid, malonamide in dilute alcoholic soda, and the print is further treated as in (1); (5) a fabric is printed with an aqueous paste containing caustic soda, the sodium salt of sulphonated castor oil, wheat starch, a mixture of the diazoamino compound from 5-chloro-2-methylaniline and 4-sulpho-2-aminobenzoic acid with the 2<1>-toluidide of 2 : 3-oxynaphthoic acid and, as the compound yielding acid, potassium fluorosulphonate, and the print is further treated as in (1); (6) a fabric is printed as in (1) with the use, for colouring, of a mixture as in (5) and, as the compound yielding acid, of oxamide in dilute alcoholic soda containing a mixture of polyglycols or of p-nitroformanilide in dilute soda containing pyridine; (7) a fabric is similarly printed with the use, for colouring, of a mixture of the diazoamino compound from 4 - chloro - 2 - methylaniline and 4 - sulpho - 2 - aminobenzoic acid with the 4<1>-methoxy-2<1>-methylanilide of 2 : 3-oxynaphthoic acid and, as the compound yielding acid, of dibutyl glycollate or ethyl hippurate; (8) a fabric is printed with an aqueous paste containing caustic soda, alcohol, starch tragacanth thickening, zinc oxide, a mixture of the diazoamino compound from 5-chloro-2-methylaniline and 4-sulpho-2-aminobenzoic acid with di-(acetoacetyl)tolidine and, as the compound yielding acid, ethyl hippurate, and the print is further treated as in (1); (9) a fabric is printed with an aqueous paste containing caustic soda, alcohol, thiodiglycol, starch tragacanth thickening, urea, zinc oxide, a mixture of the diazoamino compound from 4-benzoylamino-2 : 5-dimethoxyaniline and methyltaurine with the anilide of 2 : 3-oxynaphthoic acid and, as the compound yielding acid, the ester of 3-butoxy-1-butanol with diglycollic acid or ethyl hippurate, and the print is further treated as in (1); (10) a fabric is printed as in (2) with the use, as the compound yielding acid, of potassium monomethyl oxalate or maleate or sodium 1-acetoxyethane - 2 - sulphonate; (11) a fabric is printed as in (6) with the use, as the compound yielding acid of sodium bromacetate; (12) a fabric is printed as in (1) with the use, for colouring, of a mixture of the diazoamine compound from 4 - benzoylamino - 2 : 5 - diethoxyaniline and methylglucamine and the anilide of 2 : 3-oxynaphthoic acid and, as the compound yielding acid, of potassium fluorosulphonate.  Other compounds specified as capable of splitting off acid when steamed are methylene sulphate, glycerol monoformate, glycol monoand di-formates, methyl lactate, dimethyl tartrate, diacetamide and esters of phosphoric and boric acids.  The diglycollic acid ester of 3-butoxy-1-butanol is prepared by heating the acid and alcohol in presence of toluene and distilling away the water formed.