Method for the reactive coloring of leather

A process, comprising contacting leather with a float that comprises at least one dye F which has at least one group represented by formula A:

• where
• - - - - denotes the bond to the dye molecule;
• X is an electron-attracting radical, wherein at least one radical X is present and is an SO3H group;
• k is 1, 2 or 3;
• n is 0 or 1;
• and
• B is a CH═CH2 group or a CH2—CH2-Q group, where Q is an alkaline-detachable group, wherein during said contacting said float has a pH of from 8.5 to 11, or during said contacting said float initially has a pH of from 3.5 to 7.4 which is then set to a value of from 8.5 to 11 to fix the dye to said leather, and wherein
• said at least one dye is selected from the group consisting of
• Dk1-N═N-Kk1[-N═N-Dk2]m;
• (I)
• Dk1-N═N-Napht1-N═N-Tk1-N═N-Kk1[-N═N-Dk2]n (IIb)
• Dk1-N═N-Napht1-N═N-Tk1-N═N-Kk1-N═N-Tk2-N═N-Napht2-N═N-Dk2;
• (III)
• Dk1-N═N-Kk1-N═N-Tk1-N═N-Kk2-N═N-Dk2;
• (IV)
• Dk1-N═N—[P—N═N-]pNapht1-[-N═N—R]r—NH-Tr1—NH-Dk2;
• (V)
• Dk1-N═N—P—NH-Tr1-NH—R—N═N-Dk2;
• (VI)
• Dk1-N═N-Napht1-N═N-Tk1-N═N—P—NH-Tr1-NH-Dk2;
• (VII)
• Dk1-N═N-Napht1-NH-Tr1-NH—P—NH-Tr2—NH-Napht2-N═N-Dk2;
• (VIII)
• Dk1-N═N-Napht1—NH-Tr1-NH-Tk1-NH-Tr2-NH-Napht2-N═N-Dk2;
• (IX)
• Dk1[-N═N-L]k-NH-Tr1-NH-M-N═N-Napht1-N═N—P—NH-Tr2-NH—[R—N═N-]nDk2;
• (X)
• Dk1-N═N-Kk1-N═N-Tk1-NH-Tr1-NH-Dk2;
• (XI)
• Dk1-N═N-Pyr-A;
• (XIII)
• Kk3-N═N-Tk1-N═N-Kk1-N═N-A;
• (XIV)
• Dk1-N═N—P—N═N-Kk1-N═N—R—N═N-Dk2;
• (XV), and
• a metal complex thereof,
• where
• k, n′, p and r are independently 0 or 1;
• m is 0, 1 or 2;
• each of Dk1 and Dk2 independently represents an aromatic amine radical or represents a group of formula A where, in each of the formulae I, IIb, III-XI and XIII-XV, at least one of Dk1 and Dk2 represents a radical of formula A;
• each of Kk1 and Kk2 independently represents a monovalent, a divalent or a trivalent aromatic radical selected from the group consisting of benzene;
• naphthalene;
• pyrazole;
• quinoline;
• diphenylamine;
• diphenylmethane;
• pyrimidine;
• pyridine;
• and diphenyl ether, where each optionally has at least one substituent selected from the group consisting
• SO3H, COOH, CN, CONH2, OH, NH2, NO2, halogen, C1-C4-alkyl, C1-C4-hydroxyalkyl, carboxy-C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylamino, C1-C4-dialkylamino, C1-C4-alkylaminocarbonyl, C1-C4-dialkylaminocarbonyl, C1-C4-alkylcarbonylamino, N—(C1-C4-alkylcarbonyl)-N—(C1-C4-alkylcarbonyl)amino, C1-C4-alkylaminocarbonyloxy, C1-C4-dialkylaminocarbonyloxy, C1-C4-alkylaminocarbonylamino, C1-C4-dialkylaminocarbonylamino, phenylaminocarbonyloxy, phenylaminocarbonylamino, C1-C4-alkoxycarbonylamino, C1-C4-hydroxy-C1-C4-alkylamino, carboxy-C1-C4-alkylamino, phenylcarbonylamino, C1-C4-alkylsulfonyl, hydroxy-C1-C4-alkylsulfonyl, C1-C4-alkylaminosulfonyl, C1-C4-alkylsulfonylamino, phenylsulfonyl, phenylsulfonylamino, formamide, and a radical represented by formula SO2NR56R57,
• where each of R56 and R57 independently represent hydrogen;
• C1-C4-alkyl;
• formyl;
• C1-C4-alkylcarbonyl;
• C1-C4-alkyloxycarbonyl;
• NH2—CO-alkylaminocarbonyl;
• C1-C4-alkylaminocarbonyl;
• C1-C4-alkylaminosulfonylamino;
• di-C1-C4-alkylaminosulfonylamino;
• phenylsulfonylamino which may be substituted on the phenyl ring by 1 or 2 substituents selected from the group consisting of C1-C4-alkyl, C1-C4-alkoxy and halogen;
• or a 5- or 6-membered heterocyclyl, which is optionally substituted by 1, 2 or 3 radicals selected from the group consisting of OH, halogen, C1-C4-alkyl, C1-C4-phenyl, and a 5-membered aromatic heterocyclyl optionally bearing on the nitrogen a phenyl or naphthyl group which can optionally have 1 or 2 radicals selected from the group consisting of OH, SO3H, C1-C4-alkyl, and C1-C4-alkoxy;
• Kk3 is a monovalent radical selected from the group consisting of benzene, pyrimidine, pyridine, and naphthalene, which optionally has
• 1 or 2 hydroxysulfonyl groups as substituents,
• and optionally 1, 2 or 3 further substituents selected from the group consisting of SO3H, COOH, CN, CONH2, OH, NH2, NO2, halogen, C1-C4-alkyl, C1-C4-hydroxyalkyl, carboxy-C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylamino, C1-C4-dialkylamino, C1-C4-alkylaminocarbonyl, C1-C4-dialkylaminocarbonyl, C1-C4-alkylcarbonylamino, N—(C1-C4-alkylcarbonyl)-N—(C1-C4-alkylcarbonyl)amino, C1-C4-alkylaminocarbonyloxy, C1-C4-dialkylaminocarbonyloxy, C1-C4-alkylaminocarbonylamino, C1-C4-dialkylaminocarbonylamino, phenylaminocarbonyloxy, phenylaminocarbonylamino, C1-C4-alkoxycarbonylamino, C1-C4-hydroxy-C1-C4-alkylamino, carboxy-C1-C4-alkylamino, phenylcarbonylamino, C1-C4-alkylsulfonyl, hydroxy-C1-C4-alkylsulfonyl, C1-C4-alkylaminosulfonyl, C1-C4-alkylsulfonylamino, phenylsulfonyl, phenylsulfonylamino, formamide, and a radical of the formula SO2NR56R57,
• where R56 and R57 independently represent hydrogen;
• C1-C4-alkyl;
• formyl;
• C1-C4-alkylcarbonyl;
• C1-C4-alkoxycarbonyl;
• NH2—CO-alkylaminocarbonyl;
• C1-C4-alkylaminocarbonyl;
• C1-C4-alkylaminosulfonylamino;
• di-C1-C4-alkylaminosulfonylamino;
• phenylsulfonylamino which may be substituted on the phenyl ring by 1 or 2 substituents selected from the group consisting of C1-C4-alkyl, C1-C4-alkoxy and halogen;
• or a 5- or 6-membered heterocyclyl, which is optionally substituted by 1, 2 or 3 radicals selected from the group consisting of OH, halogen, C1-C4-alkyl, C1-C4-phenyl, and a 5-membered aromatic heterocyclyl optionally bearing on the nitrogen a phenyl or naphthyl group which can optionally comprise 1 or 2 radicals selected from the group consisting of OH, SO3H, C1-C4-alkyl, and C1-C4-alkoxy;
• each of Tk1 and Tk2 independently represents a divalent aromatic radical selected from the group consisting of benzene, diphenylamine, biphenyl, diphenylmethane, 2-phenylbenzimidazole, phenylsulfonylbenzene, phenylaminosulfonylbenzene, stilbene and phenylaminocarbonylbenzene, where each optionally has at least one substituent selected from the group consisting of SO3H, COOH, OH, NH2, NO2, halogen, and C1-C4-alkyl;
• each of L, M, P and R independently represents a divalent aromatic radical selected from the group consisting of benzene and naphthalene, where each optionally has at least one substituent selected from the group consisting of SO3H, COOH, CN, CONH2, OH, NH2, NO2, halogen, C1-C4-alkyl, C1-C4-hydroxyalkyl, carboxy-C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylamino, C1-C4-dialkylamino, C1-C4-alkylaminocarbonyl, C1-C4-dialkylaminocarbonyl, C1-C4-alkylcarbonylamino, N—(C1-C4-alkylcarbonyl)-N—(C1-C4-alkylcarbonyl)amino, C1-C4-alkylaminocarbonyloxy, C1-C4-dialkylaminocarbonyloxy, C1-C4-alkylaminocarbonylamino, C1-C4-dialkylaminocarbonylamino, phenylaminocarbonyloxy, phenylaminocarbonylamino, C1-C4-alkoxycarbonylamino, C1-C4-hydroxy-C1-C4-alkylamino, carboxy-C1-C4-alkylamino, phenylcarbonylamino, C1-C4-alkylsulfonyl, hydroxy-C1-C4-alkylsulfonyl, C1-C4-alkylaminosulfonyl, C1-C4-alkylsulfonylamino, phenylsulfonyl, phenylsulfonylamino, formamide, and a radical of the formula SO2NR56R57,
• where R56 and R57 independently represent hydrogen;
• C1-C4-alkyl;
• formyl;
• C1-C4-alkylcarbonyl;
• C1-C4-alkoxycarbonyl;
• NH2—CO-alkylaminocarbonyl;
• C1-C4-alkylaminocarbonyl;
• C1-C4-alkylaminosulfonyl amino;
• di-C1-C4-alkylaminosulfonylamino;
• phenylsulfonylamino which may be substituted on the phenyl ring by 1 or 2 substituents selected from the group consisting of C1-C4-alkyl, C1-C4-alkoxy and halogen;
• or 5- or 6-membered heterocyclyl, which is optionally substituted by 1, 2 or 3 radicals selected from the group consisting of OH, halogen, C1-C4-alkyl, phenyl, and a 5-membered aromatic heterocyclyl optionally bearing on the nitrogen a phenyl or naphthyl group which can optionally have 1 or 2 of radicals selected from the group consisting of OH, S O3H, C1-C4-alkyl, and C1-C4-alkoxy;
• Napht1, Napht2 independently represent a naphthalene radical having 1 or 2 hydroxysulfonyl groups and may optionally have 1, 2 or 3 further substituents selected from the group consisting of OH, NH2, C1-C4-alkylamino, C1-C4-dialkylamino, C1-C4-alkylsulfonylamino, phenylsulfonylamino, 4-methylphenylsulfonylamino, C1-C4-alkylaminosulfonyl, di-C1-C4-alkylaminosulfonyl, phenylaminosulfonyl, 4-methylphenylaminosulfonyl, and a NHC(O)Rx radical, where Rx hydrogen, C1-C4-alkyl, maleyl or phenyl;
• Pyr represents pyrazole-1,4-diyl which attaches through the nitrogen atom to the A group and optionally has 1 or 2 substituents selected from the group consisting of halogen, C1-C4-alkyl, hydroxyl and C1-C4-alkoxy;
• and
• Tr1, Tr2 independently represent a 1,3,5-triazine-2,4-diyl radical which optionally has at least one substituent selected from the group consisting of a halogen atom, a methyl group and a methoxy group.