EP 1576196 B1 20080903 - PROCESS FOR PREPARING A SYNTHETIC ALUMINIUM TANNING AGENT
Title (en)
PROCESS FOR PREPARING A SYNTHETIC ALUMINIUM TANNING AGENT
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES SYNTHETISCHEN ALUMINIUMGERBMITTELS
Title (fr)
PROCÉDÉ DE PRÉPARATION D'UN AGENT DE TANNAGE EN ALUMINIUM DE SYNTHÈSE
Publication
Application
Priority
IB 0205611 W 20021223
Abstract (en)
[origin: WO2004057036A1] A novel synthetic aluminium tanning agent as an alternative for chromium based tanning salts without using formaldehyde was prepared by using aromatic polymeric matrix and aluminium (III) salts as raw materials with suitable masking agents. The preparation of the syntan consists of sulphonation of aromatic molecule, which is incorporated with a polymeric network along with ligands specially designed for the complexation of aluminium (III) salts. The complex can be used as self-tanning agent in leather industry with fairly good filling behavior. The tanned leathers exhibit shrinkage temperature about 85 DEG C. Due to the higher precipitation point of the product, it can be used for tanning directly after deliming thus eliminating the pickling process. This product, unlike the conventional phenol based products, does not undergo photo-oxidation thereby preventing the discoloration of the tanned leathers.
IPC 8 full level
C14C 3/02 (2006.01); C14C 3/04 (2006.01); C14C 3/20 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
Designated extension state (EPC)
AL LT LV MK RO
DOCDB simple family (publication)
WO 2004057036 A1 20040708; AT E407225 T1 20080915; AU 2002348767 A1 20040714; AU 2002348767 B2 20061123; CN 100375789 C 20080319; CN 1720337 A 20060111; DE 60228767 D1 20081016; EP 1576196 A1 20050921; EP 1576196 B1 20080903
DOCDB simple family (application)
IB 0205611 W 20021223; AT 02781713 T 20021223; AU 2002348767 A 20021223; CN 02830145 A 20021223; DE 60228767 T 20021223; EP 02781713 A 20021223