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1. (WO2017174181) TANNING COMPOSITION AND METHOD BASED ON AN ACETAL OF AN ALDEHYDIC TANNING AGENT

Pub. No.:    WO/2017/174181    International Application No.:    PCT/EP2017/000381
Publication Date: Fri Oct 13 01:59:59 CEST 2017 International Filing Date: Thu Mar 30 01:59:59 CEST 2017
IPC: C14C 3/16
Applicants: TFL LEDERTECHNIK GMBH
Inventors: GABAGNOU, Catherine
SCHULTE, Nina
HERTA, Grigore Daniel
FENNEN, Jens
Title: TANNING COMPOSITION AND METHOD BASED ON AN ACETAL OF AN ALDEHYDIC TANNING AGENT
Abstract:
The invention relates to a composition containing an acetal of an aldehydic tanning agent for tanning hides and/or pelts and to a method for tanning hides and/or pelts in order to produce leather, wherein an acetal of an aldehydic tanning agent is used. By lowering the pH value, the aldehydic tanning agent can be released, whereby a tanning step is initiated. The composition and the method according to the invention are characterized by a lower toxicity compared to conventional compositions and tanning methods based on aldehydic tanning agents. Furthermore, an improved penetration of the tanning agents into deeper layers of the hide and/or the pelt is facilitated such that a particularly homogeneous tanning is achieved.