EP 3286342 B1 20210728 - SKINS TANNING PROCESS
Title (en)
SKINS TANNING PROCESS
Title (de)
GERBVERFAHREN FÜR HÄUTE
Title (fr)
PROCÉDÉ DE TANNAGE DE PEAUX
Publication
Application
Priority
- IT TV20150055 A 20150421
- IB 2016052282 W 20160421
Abstract (en)
[origin: WO2016170503A1] A skins tanning process comprises a tanning step and a retanning step; the tanning step comprises the steps of: treating the skin in a drum with a bath containing a tanning product comprising an acid naphthalene tannin, an acid phenolic tannin and sodium sulphate; and optionally a synthetic ester; and the retanning step comprises the steps of: treating the skin in a rotary drum with a retanning bath containing an aqueous solution of a di-aldehyde, in particular a C4-C6 linear di-aldehyde; adding a fatliquor; adding a liquid tanning product containing sulphone-based synthetic tannins, in particular phenolsulphone-based and/or di-idroxy-diphenilsulphone-based; adding a vegetal-base filler.
IPC 8 full level
C14C 3/18 (2006.01); C14C 3/16 (2006.01); C14C 3/20 (2006.01); C14C 3/22 (2006.01); C14C 3/28 (2006.01); C14C 9/02 (2006.01)
CPC (source: CN EP)
C14C 3/16 (2013.01 - CN EP); C14C 3/18 (2013.01 - CN EP); C14C 3/20 (2013.01 - CN EP); C14C 3/22 (2013.01 - CN EP); C14C 3/28 (2013.01 - CN EP); C14C 9/02 (2013.01 - CN EP)
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 2016170503 A1 20161027; CN 107743525 A 20180227; CN 107743525 B 20201229; EP 3286342 A1 20180228; EP 3286342 B1 20210728; ES 2887790 T3 20211227; IT TV20150055 A1 20161021
DOCDB simple family (application)
IB 2016052282 W 20160421; CN 201680023111 A 20160421; EP 16723529 A 20160421; ES 16723529 T 20160421; IT TV20150055 A 20150421