GB890753A - Process for modifying cellulosic textile materials - Google Patents

Abstract

Cellulosic textile materials, i.e. natural and regenerated cellulose, e.g. cotton and viscose rayon, and secondary cellulose acetate, are treated in the presence of an acid-binding agent with an aqueous suspension of a halogeno-1:3:5-triazine which is free from chromophoric and solubilizing groups, and are simultaneously or subsequently heated. Specified acid-binding agents are the oxides, hydroxides, carbonates and bicarbonates of the alkali and alkaline-earth metals, alkali-metal salts of weak acids, e.g. boric acid, and certain alkali metal phosphates. The triazines may contain alkyl, cycloalkyl, aralkyl or aryl groups attached to the triazine ring or an organic radical attached to the triazine nucleus through a nitrogen, oxygen or sulphur atom, and the aqueous suspensions may be made by stirring or milling the triazine with an anionic, cationic or non-ionic dispersing agent. The textile material may be treated with the aqueous suspension of the triazine either by an exhaustion technique at a temperature up to the boiling point of the bath or by padding followed by drying or heating at temperatures up to 200 DEG C. in the presence or absence of steam. The acid-binding agent may be applied simultaneously with or before or after the triazine, if desired with an intermediate drying stage. From 0,1 to 10% by weight of the triazine may be applied to the textile material. The textile material may be treated with urea, a water-soluble thiocyanate or sulphite, e.g. potassium thiocyanate or sodium sulphite, or a quaternary ammonium salt, e.g. cetyl trimethyl ammonium bromide, before, during or after treatment with the triazine and acid-binding agent. The application of the halogeno-1:3:5-triazines together with a water-sensitive finishing agent, as claimed in Specification 849,368, and the use of halogeno-1:3:5-triazines containing as a substituent on the triazine ring an NH- alkyl group containing more than 10 carbon atoms, as claimed in Specification 818,492, are disclaimed. Specifications 729,448 and 846,503 also are referred to.ALSO:Cellulosic textile materials, i.e. natural and regenerated cellulose, e.g. cotton and viscose rayon and secondary cellulose acetate, are treated in the presence of an acid-binding agent with an aqueous suspension of a halogeno-1 : 3 : 5-triazine which is free from chromophoric and solubilising groups, and are simultaneously or subsequently heated to modify their dyeing properties with direct dyestuffs and their handle, crease recovery properties and dimensional stability. Specified acid-binding agents are the oxides, hydroxides, carbonates and bicarbonates of the alkali and alkaline-earth metals, alkali-metal salts of weak acids, e.g. boric acid, and certain alkali metal phosphates. The triazines used may contain alkyl, cycloalkyl, aralkyl, or aryl groups attached to the triazine ring or an organic radical attached to to the triazine nucleus through a nitrogen, oxygen or sulphur atom, and the aqueous suspensions may be made by stirring or milling the triazine with an anionic, cationic or nonionic dispersing agent. The textile material may be treated with the aqueous suspension of the triazine either by an exhaustion technique at a temperature up to the boiling point of the bath or by padding followed by drying or heating at temperatures up to 200 DEG C. in the presence or absence of steam. The acid binding agent may be applied simultaneously with or before or after the triazine, if desired with an intermediate drying stage. From 0.1% to 10% by weight of the triazine may be applied to the textile material. The textile material may be treated with urea, a water-soluble thiocyanate, e.g. potassium thiocyanate, a water-soluble sulphite, e.g. sodium sulphite, or a quaternary ammonium salt, e.g. cetyl trimethyl ammonium bromide, before, during or after treatment with the triazine and the acid binding agent. Examples are given in in which cotton and viscose rayon fabrics, after treatment as described above, are stained on immersion in a solution of the diazonium salt, Brentamine Fast Black K Salt. The application of the halogen-1 : 3 : 5 triazines together with a water-sensitive finishing agent, as claimed in Specification 849,368, and the use of halogeno-1 : 3 : 5 triazines containing as a substituent on the triazine ring an NH alkyl group containing more than 10 carbon atoms, as claimed in Specification 818,492, are disclaimed. Specifications 729,448 and 846,503 also are referred to.