PURPOSE: A condensate for re-tanning an iron-tanned leather, a method for preparing leather by using the condensate and leather prepared by the method are provided, to improve ductility, body and color of leather. CONSTITUTION: The condensate is prepared from a sulfonated aromatic compound, an aldehyde and/or a ketone and optionally at least one compound selected from the group consisting of non-sulfonated aromatic compound, urea and urea derivative, and the content of a naphthalenesulfonic acid/formaldehyde condensate and a phenol and formaldehyde-based condensate is less than 25 wt%, preferably less than 5 wt% based on the total amount of condensates. The amount of the condensate to be used is 1-20 wt% based on the iron-tanned leather. The leather has a ductility more than 15 unit measured according to IUP/36.

Title
Condensate for re-tanning iron-tanned leather, preparation method of leather using the condensate and leather prepared by the method to improve ductility of leather
Application Number
1020030074985
Publication Number
1020040038694
Application Date
October 27, 2003
Publication Date
May 8, 2004
Inventor
Whiteman John D
Tegtmeyer Dietrich
Markgraf Kirsten
Kaplan Ahmet
Kleban Martin
Assignee
Rohm And Haas Company
Bayer Aktiengesellschaft
IPC
C14C 03/20