Patent ID: 8808398
Filing Date: 2014-08-19
Classification: C07D,C14C

Abstract:
1. A process for the production of tanned leather, skin or pelt 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 a sulpho-group-containing dichloro-diazine selected from the group of consisting of compounds of formula (I) of formula (II) of formula (III) and mixtures thereof, wherein R1 is hydrogen, methyl, methoxy, benzoyl, naphthoyl, mono- or di(C R2-(SO R3 is hydrogen, C m is 1 or 2, n is 1 or 2 and M is hydrogen, an alkali metal cation or an ammonium cation, the ammonium cation being a protonated tertiary amine or a quaternary ammonium cation, in a tanning bath, the tanning bath having a pH of from 6 to 10 at the beginning of tanning step.