| 摘要 |
Tanned leather, skin or pelt is produced by non-metal tanning, comprising the step of tanning a bated hide, skin or pelt with a tanning agent (A), the tanning agent (A) being at least a mixture of compounds of formula (I) and formula (II), wherein Hal signifies fluorine or chlorine, R1 signifies hydrogen, C1-8-alkyl or an alkyleneoxy radical of formula (III), -(-C2-3 alkylene-O-)q-H(III) R2 signifies a) phenyl, mono- or di-substituted with SO3M or COOM and optionally substituted also with hydroxyl or C1-4-alkyl or C1-4-alkoxy, or b) naphthyl, mono- or di- or tri-substituted with SO3M and optionally substituted also with hydroxyl, or c) C1-8-alkylene, substituted with (SO3M) or (COOM), or d) a radical of formula (IV), -(-C2-3 alkylene-O-)p-Y(IV) e) or a radical of formula (IVa), -(C2-3 alkylene-O)p-C2-3 alkylene-SO2CH2CH2O-Y(IVa) m signifies 1 or 2, p signifies 0 or 1, Y signifies hydrogen or -SO3M, q is of from 1 to 10, M signifies hydrogen or an alkali metal cation or an ammonium cation, the ammonium cation being a protonated tertiary amine or a quaternary ammonium cation, R3 signifies hydrogen or chlorine, in a tanning bath, the tanning bath having a pH of from 6 to 10 at the beginning of tanning step.
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