EP 0024014 B1 19820519 - METHOD OF RETANNING MINERAL TANNED LEATHER WITH AROMATIC SULFONIC ACIDS
Title (en)
METHOD OF RETANNING MINERAL TANNED LEATHER WITH AROMATIC SULFONIC ACIDS
Publication
Application
Priority
DE 2932688 A 19790811
Abstract (en)
[origin: EP0024014A1] 1. Process for re-tanning mineral-tanned leathers, characterised in that sulphonic acids, and salts thereof, of the general formula see diagramm : EP0024014,P5,F5 wherein R represents the radical see diagramm : EP0024014,P5,F6 see diagramm : EP0024014,P5,F7 see diagramm : EP0024014,P5,F8 R1 represents hydrogen or methyl, X represents hydrogen, an alkali metal ion, in particular a sodium or potassium ion, or an ammonium ion and n represents a number from 1-4, and wherein SO3 X is bonded to phenyl, are used as the re-tanning agents.
IPC 1-7
IPC 8 full level
C14C 3/26 (2006.01); C14C 3/04 (2006.01); C14C 3/08 (2006.01); C14C 3/28 (2006.01); D06P 1/62 (2006.01); D06P 3/32 (2006.01)
CPC (source: EP)
C14C 3/08 (2013.01); C14C 3/28 (2013.01); D06P 1/625 (2013.01); D06P 3/32 (2013.01)
Designated contracting state (EPC)
BE CH DE FR GB IT
DOCDB simple family (publication)
EP 0024014 A1 19810218; EP 0024014 B1 19820519; AR 220483 A1 19801031; BR 8005016 A 19810224; DE 2932688 A1 19810226; DE 3060449 D1 19820708; ES 494117 A0 19810316; ES 8104420 A1 19810316; JP S5628300 A 19810319; JP S6318640 B2 19880419
DOCDB simple family (application)
EP 80104522 A 19800731; AR 28211880 A 19800811; BR 8005016 A 19800808; DE 2932688 A 19790811; DE 3060449 T 19800731; ES 494117 A 19800808; JP 10779880 A 19800807