EP 3440227 B1 20211201 - COMPOSITION AND PROCESS FOR TANNING BASED ON ACETAL OF ALDEHYDIC TANNING AGENT
Title (en)
COMPOSITION AND PROCESS FOR TANNING BASED ON ACETAL OF ALDEHYDIC TANNING AGENT
Title (de)
ZUSAMMENSETZUNG UND VERFAHREN ZUR GERBUNG BASIEREND AUF EINEM ACETAL EINES ALDEHYDISCHEN GERBSTOFFES
Title (fr)
COMPOSITION ET PROCÉDÉ DE TANNAGE BASÉ SUR DES ALDÉHYDES SOUS FORME DES ACÉTALS COMME AGENT DE TANNAGE
Publication
Application
Priority
- DE 102016004192 A 20160406
- EP 2017000381 W 20170329
Abstract (en)
[origin: WO2017174181A1] 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.
IPC 8 full level
C14C 3/16 (2006.01)
CPC (source: EP US)
C14C 3/16 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2017174181 A1 20171012; BR 112018067719 A2 20190108; BR 112018067719 B1 20221129; CN 108884500 A 20181123; CN 108884500 B 20220819; DE 102016004192 A1 20171012; EP 3440227 A1 20190213; EP 3440227 B1 20211201; EP 3561081 A1 20191030; ES 2906793 T3 20220420; MX 2018011665 A 20190110; PT 3440227 T 20220303; US 10604813 B2 20200331; US 2019106758 A1 20190411
DOCDB simple family (application)
EP 2017000381 W 20170329; BR 112018067719 A 20170329; CN 201780020837 A 20170329; DE 102016004192 A 20160406; EP 17715042 A 20170329; EP 19167730 A 20170329; ES 17715042 T 20170329; MX 2018011665 A 20170329; PT 17715042 T 20170329; US 201716089523 A 20170329