GB406686A - Improvements in or relating to the treatment of textile and other materials - Google Patents

Abstract

Cellulose esters or ethers, dyeing; unspecified types of dyes, dyeing with; dye preparations; cellulose carboxylates; cellulose ethers.--The fastness of colourations on textile or other materials, especially the fastness to the combined action of light and of acid fumes, is improved by incorporating therein compounds which contain an acidylamino or an acid amide group as a substituent in an aryl nucleus and which contain also (a) an additional substituent in the aryl nucleus, said substituent bearing a non-aromatically linked basic amino group or (b) a non-aromatically linked basic amino group as a substituent in the acidyl group of the said acidylamino group. Specified bases are o -diethylaminoacetanilide, di-(o -diethylaminoacetyl) - p - phenylenediamine, p - acetylaminobenzyldiethylamine p - benzoylamino - benzyldiethylamine and 4 - (diethylaminomethyl) benzamide. Other substances capable of improving the fastness, such as those of Specifications 243,841, [Class 15 (ii)], 340,541, 340,572, 355,726, 361,362, 361,381, 373,628, or 378,473, with or without inorganic compounds having an alkaline reaction, such as sodium carbonate, borax, disodium hydrogen phosphate, sodium acetate, sodium palmitate or sodium oleate, may be used in conjunction with the bases. The bases may in some cases be absorbed from aqueous solutions of their salts; they may also be applied as aqueous dispersions produced, for example, by the methods of Specifications 219,349, 224,925, 242,393, 242,711, 269,960, 273,819, 273,820, 322,737, or 323,788, [all in Class 15 (ii)]. Compositions containing the bases and the dyestuffs in dispersed form may be prepared for use in dyeing. In the application to cellulose ester or ether artificial materials the bases may be incorporated in the spinning solutions used. The following examples are specified: (1) a cellulose acetate fabric, dyed with 1 : 4-dimethylaminoanthraquinone, is treated in an aqueous bath containing p-acetylaminobenzyldiethylamine dispersed with turkey red oil and soap, the temperature being raised from 15 to 50 DEG C. during \ba3/4\be hour and thereafter maintained at about 80 DEG C. for a further \ba3/4\be hour; the treatment improves the resistance of the dyeing to the combined action of light and acid fumes; (2) a scoured cellulose acetate fabric is entered into a cold or luke warm aqueous bath containing 1-amino-4-methylaminoanthraquinone and di-(o -diethylaminoacetyl)-p-phenylenediamine dispersed with turkey red oil and soap and the temperature is slowly raised to 80 DEG C and there maintained for about \ba3/4\be hour; the dyeing has improved fastness to the combined action of light and acid fumes; (3) a solution of cellulose acetate containing di-(o -diethylaminoacetyl-p-phenylenediamine is dry spun to form filaments and a fabric made therefrom is dyed in a bath containing a dispersion of 1 : 4-diethanolaminoanthraquinone and benzylethylaniline and thereafter washed, hydroextracted, treated with a dilute solution of borax and dried; the incorporation of the base in the spinning solution gives the dyeing improved resistance to fading under acid conditions. The invention is applicable also to wool, cotton, silk and other fibres. p-Acetylamino- and p-benzoylamino-benzyl-diethylamines are obtained by acetylating and benzoylating respectively the products obtained by reducing the nitro group of the condensation product of p-nitrobenzyl chloride with diethylamine. Di-(o -diethylaminoacetyl)-p-phenylenediamine is obtained by condensing diethylamine with the product of condensation of p-phenylenediamine (1 mol.) with chloracetyl chloride (2 mols.).