COMPOSITIONS COMPRISING AT LEAST ONE COMPOUND CONTAINING A CARBAMOYL SULFONATE GROUP AND USE OF THE SAME AS TANNING AGENTS

摘要

Aqueous composition comprises at least a carbamoylsulfonate group containing compound (a), and at least a non-ionic, ester group containing alkoxylated polyol (b1) with a hydrophilic-lipophilic balance value of 13 and/or alkyl glycoside (b2). Independent claims are included for: (1) the preparation of the aqueous solution comprising at least an organic polyisocyanate with at least a bisulfite in the presence of water, adding (b) and optionally a carboxylic acid and transferring optionally with further additives; (2) tanning skin or fur comprising washing, optionally unhairing, or decalcifying pretreated skin or fur with the aqueous composition; (3) the preparation of leather and/or fur comprising treating prepared pelt material with 0.5-10, preferably 1-4% of (a) in water fleet at 10-60[deg] C and in a pH of 5-10, preferably 7-9 until a tanned intermediate product with a shrink temperature of at least 65[deg] C, preferably 70[deg] C is produced; and (4) the compound (a) obtained by reacting at least an organic isocyanate with at least a bisulfite and at least a carboxylic acid, which is hydroxy-polycarboxylic acid, preferably citric acid in the presence of (b1) and (b2).