Patent DE-102009047183-A1 (DE)
Title: Dye mixture, useful for coloring leather, comprises a first anionic dye, a second anionic dye, and third anionic dye, where the first and third anionic dye are azo dyes, and the second anionic dye is the azo dye or napthalene-azo dye
Inventor: ZAMPONI ANDREA
IPC: D06P3/02
Filed: 2009-11-26
Abstract: Dye mixture comprises a first anionic dye; a second anionic dye, which exhibits different color from the first anionic dye; and optionally third anionic dye, which exhibits different color from the first and second anionic dye, where: the first anionic dye is an azo dye (I)-(III), the second anionic dye is (I)-(III) or their salt or metal complex or napthalene-azo dye of formula (IV) or its salt or metal complex, and the third anionic dye is (II)-(IV) or their salt or metal complex. Dye mixture comprises a first anionic dye; a second anionic dye, which exhibits different color from the first anionic dye; and optionally third anionic dye, which exhibits different color from the first and second anionic dyes, where: the first anionic dye is an azo dye of formulae (I)-(III), the second anionic dye is (I)-(III) or their salt or metal complex or napthalene-azo dye of formula (IV) or its salt or metal complex, and the third anionic dye is (II)-(IV) or their salt or metal complex. Dk : SO 3H; n : 0 or 1; A : SO 3H or substituted benzene group of formula (A1); X : H or SO 3H; Y 1>H, halo, 1-4C-alkyl, CN or SO 3H; B 1>CH=CH 2or CH 2-CH 2-Q; Q : a group, which is cleavable under alkali conditions; Dk : phenyl or naphthyl (both optionally substituted by 1-3 R1a); R1a : 1-4C-alkylaminosulfonylamino, di-1-4C-alkylaminosulfonylamino, phenylamino, phenylaminocarbonyl, phenoxy, phenylsulfonyl, phenylsulfonylamino, phenylaminosulfonyl, phenylcarbonylamino, phenylaminocarbonyloxy or phenylaminocarbonylamino (all optionally substituted by 1-4C-alkyl, OH, COOH, 1-4C-alkoxy, 1-4C-alkylcarbonyloxy, 1-4C-alkylcarbonylamino, 1-4C-alkoxycarbonyl, NH 2, NO 2, SO 3H or halo at the phenyl ring), SO 3H, COOH, CN, CONH 2, OH, NH 2, NO 2, halo, 1-4C-alkyl, 1-4C-hydroxyalkyl, carboxy-1-4C-alkyl, 1-4C-alkoxy, 1-4C-alkylamino, 1-4C-dialkylamino, 1-4C-alkylaminocarbonyl, 1-4C-dialkylaminocarbonyl, 1-4C-alkylcarbonylamino, N-(1-4C-alkylcarbonyl)-N-(1-4C-alkylcarbonyl)amino, 1-4C-alkylaminocarbonyloxy, 1-4C-dialkylaminocarbonyloxy, 1-4C-alkylaminocarbonylamino, 1-4C-dialkylaminocarbonylamino, 1-4C-alkoxycarbonylamino, 1-4C-hydroxy-1-4C-alkylamino, carboxy-1-4C-alkylamino, 1-4C-alkylsulfonyl, hydroxy-1-4C-alkylsulfonyl, 1-4C-alkylaminosulfonyl, 1-4C-alkylsulfonylamino, aminocarbonyl, SO 2NR 1>1>R 1>2>, or 5- or 6-membered heterocyclyl (optionally substituted by one or two of OH, halo, 1-4C-alkyl or phenyl (optionally substituted by 1-4C-alkyl, OH, COOH, 1-4C-alkoxy, 1-4C-alkylcarbonyloxy, 1-4C-alkylcarbonylamino, 1-4C-alkoxycarbonyl, NH 2, NO 2, SO 3H or halo)); R 1>1>, R 1>2>H, 1-4C-alkyl, formyl, 1-4C-alkylcarbonyl, 1-4C-alkyloxycarbonyl, NH 2-CO or 1-4C-alkylaminocarbonyl; Ar 1>a bivalent residue of benzene or naphthalene (optionally substituted by 1-4 substituents of R1b); R1b : R1a; R 1>NH 2or OH; R 2>OH, NH 2, 1-4C-alkoxy, 1-4C-alkylamino, 1-4C-hydroxyalkylamino, (HO 3S-1-4C-alkyl)amino, 1-4C-dialkylamino, 1-4C-alkylcarbonylamino, N-(1-4C-alkyl)-N-(1-4C-alkylcarbonyl)amino, 1-4C-alkylaminocarbonyloxy, 1-4C-dialkylaminocarbonyloxy, 1-4C-alkylaminocarbonylamino, 1-4C-dialkylaminocarbonylamino, 1-4C-alkoxycarbonylamino, carboxy-1-4C-alkylamino, 1-4C-alkylsulfonylamino, phenylaminocarbonyloxy, phenylaminocarbonylamino, phenylcarbonylamino or phenylsulfonylamino (where the phenyl ring is optionally substituted by 1-3 OH, NO 2, halo, 1-4C-alkoxy, 1-4C-alkyl or SO 3H); either m-s : 0 or 1; or n+q : 0 or 1; or r+s : 1 or 2; k : 0-2; Ar 2>Ar 1>; R2x : R 2>; T : SO 3H or a bivalent residue of formula (T1); R 3>, R3a : H, halo, COOH, OH or SO 3H; D 1>a chemical bond, 1-4C-alkan-1,1-diyl, ethen-1,2-diyl, O, NH, C(O), S(O) 2, C(O)NH, NHC(O)NH or S(O) 2NH; KK : coupling component; X : R 1>; Y 2>H or R 2>; and T 1>T. Where: at least one of A or Dk contains SO 3H group, and k is not equal to 0. An independent claim is included for a method for coloring leather comprising treating the leather with an aqueous dye bath having a pH of 7.5-11 and containing the dye mixture. [Image] [Image] [Image] [Image].