CS236048B1 - Mixed dye stuff for dyeing and printing of synthetic textile materials - Google Patents

Abstract

Mixed azo dye for synthetic dyeing textile materials and printing synthetic textile materials wherein X is COOCH2 and COOC6H2 is prepared so that it is a diazotizing component a mixture of ethyl and methyl esters is used p-aminobenzoic acid in a 2: 1 molar ratio up to 1 t 2. The dye is applicable for application for coloring polyester, polyamide, acetate and triacetate textile materials and classical dyeing of these materials by transfer textile printing.

Description

The present invention provides a blend dye for dyeing polyester, polyamide, acetate and triacetate textile materials.

The hitherto known dyes for the above-mentioned use have been formed on the basis of a methyl ester of p-arainobenzoic acid (Cl Disperse Yell 60). The crystalline forms in which, for example, the dye can be prepared do not suit the liquid formulations due to poor theological properties. A mixed dye of constitution has now been found

N = N-C-C-CH.

where X denotes -COOC! _I? a-C00C to water of the starting components, forming mixed crystals and prepared by simultaneous diazotization of the starting esters of p-arainobenzoic acid as diazotizing components in a molar ratio of 2: 1 to 1: 2, preferably 1: 1, followed by coupling with 1 phenyl-3-methyl-5-pyrazolo [iota] 4 in the presence of nonionic surfactants eliminating substantially the above-mentioned drawbacks of the present dye when applied. Deho physical characteristics are advantageous for the preparation of liquid final forms.

The mixed dye according to the invention forms mixed crystals which are formed during the azocopulation of a mixture of diazotized methyl and ethyl esters of p-arainobenzoic acid in an aqueous solution medium.

236 048 hydrochloric acid with 1-phenyl-3-methyl-5-pyrazolone in the range of pH 3 to 9 at a reaction temperature of 15 to 50 ° C and in the presence of non-ionic surfactants.

Preferably, fatty alcohol oxyethylation products containing 20 to 40 ethyleneoxy units or 10 to 30 ethyleneoxy unit alkyl phenols may be used. The resulting dye according to the invention prepared under the above reaction conditions is characterized by an advantageous texture which allows easy processing by fine grinding in pearl mills and long-term shelf life of liquid final forms with a low content of excipients. The crystalline modification is sufficiently thermodynamically stable and is not subject to recrystallization or phase transitions under storage and dyeing conditions.

The subject matter of the invention is further illustrated by the following example of a fractogram in the accompanying drawing, in which the x-axis is plotted d in A ° in% intensity and on the y-axis inter-plane distance.

0.5 mole of methyl p-aminobenzoate and 0.5 mole of ethyl p-aminobenzoate are dissolved in 2000 ml of water containing 2.5 mole of HCl and the solution is cooled to -3 to -5 ° C at which perform diazotization by addition of 1.02 mol of alkaline nitrite. The mixture of diated components is further coupled with 1-phenly-3-methyl-5-pyrazolone (1mol), dissolved in 6000 ml of water with 1.25 moles of alkali hydroxide and 3 g of oxyethylation product of fatty alcohols containing 12 carbon atoms. After the azocopulation reaction is complete, the reaction mixture is heated to a temperature of SC2C for 30 to 40 minutes. The crystalline dye is obtained in a yield of 97-99%, characterized by the X-ray diffractogram in the attached drawing. The dye obtained is finalized to a powder form by the addition of 2 dfp dispersants based on ligninsulfone3

236 04S for 1 part of the starting pigment by finely grinding in a pearl mill and spray drying or liquid form, containing approx. . The liquid form is suitable for textile transfer printing.

Claims (1)

SUBJECT OF THE INVENTION 236 048 Mixed dye for dyeing and printing synthetic textile materials in the form of mixed crystals of the formula wherein X denotes -COOCH and 3 COOC 2 H 5 in a ratio of 2: 1 to 1: 2.