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. 10, 2010
Filed:
Aug. 08, 2003
Stephan Hueffer, Ludwigshafen, DE;
Stefan Schroeder, Neuleiningen, DE;
Einhard Wagner, Speyer, DE;
Thorsten Raedler, Ludwigshafen, DE;
Karl Vill, Korschenbroich, DE;
Stephan Hueffer, Ludwigshafen, DE;
Stefan Schroeder, Neuleiningen, DE;
Einhard Wagner, Speyer, DE;
Thorsten Raedler, Ludwigshafen, DE;
Karl Vill, Korschenbroich, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A formulation for use in chrome-free or chrome tanning is proposed, comprising a clay mineral which, after vigorous stirring for 30 minutes in water at 50° C., has a number average particle diameter of less than 2 μm or a bimodal size distribution with a first, finely divided fraction whose number average particle diameter is less than 0.5 μm and a second, coarser fraction whose number average particle diameter is less than 5 μm, determined in each case by the method according to ISO 13320-1, by combined laser light diffraction and light scattering, the amount of the first, finely divided fraction being from 10 to 90% by weight, and one or more substances from one or more of the following groups: organic polymers, aldehyde tanning agents, sulfone tanning agents, resin tanning agents, phenol tanning agents, fatliquoring agents, vegetable tanning agents, dyes and pigments.