EP 0201054 B1 19880817 - TANNING PROCESS SAVING CHROME
Title (en)
TANNING PROCESS SAVING CHROME
Publication
Application
Priority
DE 3516842 A 19850510
Abstract (en)
[origin: ES8800727A1] Economy chrome tanning process wherein the pelts are pretreated before the tanning with 0.1 to 2% of an aldehyde- or keto-acid, preferably with glyoxylic acid or pyruvic acid, and are then tanned by customary methods. In this pretreatment, which is preferably carried out in the pickle, the tanning requires a chromium supply of only 1.25 to 1.5% of Cr2O3 on weight of pelt. Despite this reduced amount of chrome tannin the results obtained are boil-resistant leathers with uniform chromium distribution, excellent color levelness and very good physical properties.
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0201054 A1 19861112; EP 0201054 B1 19880817; BR 8602098 A 19870113; DE 3516842 A1 19861113; DE 3660552 D1 19880922; ES 554783 A0 19871116; ES 8800727 A1 19871116; JP H022920 B2 19900119; JP S61261400 A 19861119; KR 860009131 A 19861220; KR 940006073 B1 19940706; US 4715861 A 19871229; YU 43898 B 19891231; YU 74786 A 19871231
DOCDB simple family (application)
EP 86106024 A 19860502; BR 8602098 A 19860509; DE 3516842 A 19850510; DE 3660552 T 19860502; ES 554783 A 19860508; JP 10398286 A 19860508; KR 860003582 A 19860508; US 86110086 A 19860508; YU 74786 A 19860508