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:
Aug. 12, 2014
Filed:
Oct. 05, 2011
Claus Reineking, Waldenbuch, DE;
Roberta Gamarino, Casale Monferrato, IT;
Licia Trimarco, Saronno, IT;
Maurizio Quaglierini, Chianni, IT;
Markus Gisler, Rheinfelden, CH;
Rainer Nusser, Neuenburg, DE;
Claus Reineking, Waldenbuch, DE;
Roberta Gamarino, Casale Monferrato, IT;
Licia Trimarco, Saronno, IT;
Maurizio Quaglierini, Chianni, IT;
Markus Gisler, Rheinfelden, CH;
Rainer Nusser, Neuenburg, DE;
Stahl International B.V., Waalwijk, NL;
Abstract
Tanned leather, skin or pelt is produced by non-metal tanning, comprising the step of tanning a bated hide, skin or belt with a tanning agent (A) of at least a mixture of compounds of formula (I) and formula (II), wherein Hal signifies fluorine or chlorine, R1 signifies hydrogen, C-alkyl or an alkyleneoxy radical of formula (III), —(—Calkylene-O—)—H (III); R2 signifies a) phenyl, mono- or di-substituted with SOM or COOM and optionally substituted also with hydroxyl, C-alkyl C-alkoxy; b) naphthyl, mono- or di- or tri-substituted with SOM and optionally substituted also with hydroxyl; c) C-alkylene, substituted with (SOM) or (COOM); d) aradical of formula (IV), —(—Calkylene-O—)—Y (IV) or e) a radical of formula (IVa) —(Calkylene-O)—Calkylene-SOCH2CHO—Y (IVa), M signifies 1 or 2, p signifies 0 or 1, Y signifies hydrogen or —SOM, q signifies 1 to 10, M signifies hydrogen, an alkali metal cation or an ammonium cation being aprotonated tertiary amine or a quaternary ammonium cation, R3 signifies hydrogen or chlorine. In a tanning bath having a pH of from 6 to 10 at the beginning of tanning step.