Patent DE-102006022228-A1 (DE)
Title: Use of decolorizing agent comprising sulfinic acid derivative and an oxidative dye comprising developer component and coupling agent, to decolorize substrates with natural- and/or synthetic dyes e.g. paper, fibers and textiles
Inventor: MUELLER BURKHARD
IPC: A61Q5/10
Filed: 2006-05-11
Abstract: Use of a decolorizing agent (A) comprising at least a sulfinic acid derivative (I) in a carrier, and an oxidative dye comprising at least a developer component (E1) and at least a coupling agent (K1) or their salt in another carrier, for the decolorization of substrates. Use of a decolorizing agent (A) comprising at least a sulfinic acid derivative of formula (I) in a carrier, and an oxidative dye comprising at least a developer component of formula (E1) and at least a coupling agent of formula (K1) or their salt in a carrier, for the decolorization of substrates. R : a peptide derivative, alkyl compound of formula (R2>-C(Y1>)(R1>)-), (M1>-SO-C(Y2>)(R1>4>)-X-C(Y1>)(R1>)-), R1>0>-NH-CO-, R1>3>-SO2-NH-C(R1>1>)(R1>2>)- or a phenyl compound of formula (IV); Y1>, Y2>OH, -NH2 group or -NR3>R4>; R3>, R4>2-6C alkenyl, 1-6C (hydroxy)alkyl, 2-6C polyhydroxyalkyl, aryl or aryl-1-6C alkyl; X : a direct bond or an organic residue with two free valency; either R1>, R1>4>H, 1-6C alkyl or carboxyalkyl-(CH2)m-COOM2>; and R2>H, 1-6C alkyl, carboxyalkyl-(CH2)n-COOM3>, 1-6C alkyloxycarbonyl, sulfonic acid, carbamoyl, N,N-di(1-6C alkyl)carbamoyl, N,N,N-tri(1-6C alkyl)ammonium-1-6C alkyl, carboxy-2-6C alkenyl, cyano-1-6C alkyl, 1-6C alkoxycarbonyl-1-6C alkyl, aliphatic or aromatic heterocyclic, which is substituted, or (IV); or R2>R1>aliphatic 5-7-membered ring containing at least a cationic, quaternary nitrogen atom as a heteroatom, where the cationic load is compensated optionally through an equivalent mono- or polyvalent anion; R7>carboxy group, sulfonic acid group, 1-6C alkoxycarbonyl, sulfonamide, cyano, nitro, carboxy-1-6C alkyl, carboxy-1-6C alkoxy or an amine group of formula (-N+>RaRbRc); Ra, Rb, Rc : 1-6C alkyl, 2-6C alkenyl, aryl-1-6C alkyl or 1-6C hydroxyalkyl; M, M1>-M3>H or an equivalent of mono- or polyvalent cation; R8>, R9>H, 1-6C alkyl, 2-6C alkenyl, 1-6C hydroxyalkyl, 2-6C polyhydroxyalkyl, 1-6C alkoxy, OH, amino, carboxy, nitro, cyano or halo; R1>0>1-6C alkyl, optionally substituted aryl, optionally substituted heteroaryl, carboxy-1-6C alkyl, carboxy-2-6C alkenyl, 1-6C alkoxycarbonyl or 1-6C alkoxycarbonyl-1-6C alkyl; R1>1>-R1>3>H, 1-6C alkyl, 2-6C alkenyl, perfluorinated 1-6C alkyl, 3-6C cycloalkyl, optionally substituted (hetero)aryl, 1-6C hydroxyalkyl, 2-6C polyhydroxyalkyl, aryl-1-6C alkyl, carboxy-1-6C alkyl, carboxy-2-6C alkenyl or 1-6C alkoxycarbonyl-1-6C alkyl; Ra1>, Ra2>, Ra7>, Ra8>H or methyl; R3>H or amino; R4>, R5>H, methyl or 2-hydroxyethyl; R6>OH or -NR9>R1>0>; either Ra9>, Ra1>0>H or methyl; or Ra9>Ra1>0>unsaturated 5-6 membered ring; n : 0-6; and m : 0-2. Where R1> and R2> are not simultaneously H. Independent claims are included for: (1) a process of decolorizing a substrate comprising applying (A) on the colored substrate, and then washing; and (2) a sales unit (kit-of-parts) comprising a first container with at least a dye comprising (I), and a second container with at least a dye comprising (E1) and (K1). [Image].