Verfahren zur Herstellung von echten Faerbungen oder Drucken auf Fasern oder Geweben aus natuerlicher oder regenerierter Cellulose

摘要

Dyestuffs containing at least once the residue wherein X is CO or SO2, Y is a saturated or unsaturated alkylene group, Z is SO2, SO, S or O, R is hydrogen or alkyl and R1 is alkyl, aralkyl, cycloalkyl or aryl, are used to dye cellulosic materials. Their dyeings or prints on cellulose are fixed by formation of a chemical bond, if desired, in the presence of salts or organic or inorganic acids, especially those having an alkaline reaction. Specified dyestuffs belong to the nitro, azine, anthraquinone, phthalocyanine and, especially, azo dyestuff series. The dyes may be prepared by allowing halides of sulphonic or carboxylic acids of the formula Hal-X-Y-Z-R1 or the corresponding carboxylic acid anhydrides, wherein X, Y, Z and R1 are as defined above, to react with dyestuffs or dyestuff intermediates containing primary or secondary amino groups and, where necessary, the dyestuff intermediates may then be used for the synthesis of dyestuffs. Numerous residues which may be so introduced are specified. The dyestuffs to be used are preferably water-soluble and may contain, in complex linkage, metals, especially Cu, Ni Co or Cr. In the examples a number of dyes are specified.ALSO:Cellulosic materials are dyed or printed by treating them with solutions, suspensions or printing pastes of dyestuffs containing at least once the residue wherein X is CO or SO2, Y is a saturated or unsaturated alkylene group, Z is SO2, SO, S or O, R is hydrogen or alkyl and R1 is alkyl, aralkyl, cycloalkyl or aryl, and by fixing the dyeing or prints on the cellulose by formation of a chemical bond, if desired, in the presence of salts of organic or inorganic acids, especially those having an alkaline reaction, and other usual auxiliaries either by heating in the dry state above 100 DEG C., by steaming or in the presence of alkaline reacting agents below or above 100 DEG C. The dyestuffs may belong to the nitro, nitroso, azine, oxazine, thiazine, triarylmethane, quinoline, acridine, perinone, indigoid, anthraquinone, azomethine, phthalocyanine and, especially, azo dyestuff series and may be prepared by allowing halides of sulphonic or carboxylic acids of the formula Hal-X-Y-Z-R1 or the corresponding carboxylic acid anhydrides, wherein X, Y, Z and R1 are as defined above, to react with dyestuffs or dyestuff intermediates containing primary or secondary amino groups and, where necessary, the dyestuff intermediates may then be used for the synthesis of dyestuffs. Numerous residues which may be so introduced are specified. The dyestuffs to be used are preferably watersoluble and may contain, in complex linkage, metals, especially Cu, Ni, Co or Cr or the dyeings or prints may be after-treated with metal salts, especially Cu salts. Printing may be effected with an aqueous paste which may contain usual auxiliaries such as alginate, tragacanth, urea and dinaphthylmethane sulphonic acids. Suitable alkaline-reacting agents are ammonium acetate, sodium acetate, carbonate and bicarbonate, ammonium and alkali metal phosphates, sodium and potassium hydroxides, ammonia and soluble ammonium compounds. The impregnation with the dye solution and with the metal salts may be effected from the same or separate baths.