The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 1994
Filed:
Jan. 22, 1993
Alain Lauton, Saint-Louis, FR;
Markus Hess, Steinen-Hofen, DE;
Gunter Streicher, Weil am Rhein, DE;
Alois Puntener, Rheinfelden, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
A process for pickling and pretanning raw hides which comprises (I), pickling a raw hide in an aqueous liquor A which is devoid of salts and contains (a) a reaction product of phenol and a sulfonating agent, the molar ratio of (phenol):(SO.sub.3) being (1):(1.1-2.2), and (II), pretanning the pickled raw hide in the same bath by addition of an aqueous formulation B comprising (b) a reductive saccharide having a dextrose equivalent of 10 to 100, and (c) an aliphatic dialdehyde containing 2 to 8 carbon atoms. The combined one-bath pickling/pretanning process makes it possible to prepare, in treatment baths free from neutral salts and heavy metals, readily shaveable wet white leathers that are suitable for further processing by all conventional tanning methods.