Aqueous dye preparations

Claim 1

A storage-stable aqueous dye preparation consisting essentially of, relative to the total amount of the preparation: 5to 50 percent by weight of at least one water-soluble dye; 0.1 to 5 percent by weight of a dispersing agent; 0.1 to 30 percent by weight of at least one further additive, said further additive being an auxiliary selected from the group consisting of: (a) glycine, 1-aminopropionic acid, 2-aminopropionic acid, betaine hydrate, choline, potassium glutamate, N-methyl glucamine, 2-amino-2-methyl-propanediol-1,3,2-amino-2-ethyl-propanediol-1, 3,tris-(hydroxymethyl)-aminomethane, and hydrolysed proteins having a molecular weight up to 10,000; (b) ethylenediaminetetraacetic acid, nitrilotriacetic acid, N-hydroxyethyl-ethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, N,N-(dihydroxyethyl)-glycine, N-(hydroxyethyl)-iminodiacetic acid, amino-tri-(methylenephosphonic acid), 1-hydroxyethane-1,1-diphosphonic acid, α-aminoethanediphosphonic acid, methylenediphosphonic acid, ethylenediphosphonic acid, and the Na, K, NH 4 , Li, mono-, di- and triethanolammonium salts thereof; (c) maltose, saccharose-monolaurate, adducts of 1 mol of methyl glucoside with 5 to 20 mols of ethylene oxides, and xanthane gum; (d) potassium salts, lithium salts, ammonium salts, choline salts, and amine salts optionally substituted by lower alkyl or hydroxy-lower-alkyl, of lactic acid, α-hydroxy-isobutyric acid, gluconic acid, glycolic acid, pyrrolidone-2-carboxylic acid, pyridine-3-carboxylic acid, and pyridine-2,6-dicarboxylic acid;