公开(公告)号：AU2003294721A1

公开(公告)日：2004-06-18

申请号：AU2003294721

申请日：2003-11-25

Applicant: BASF AG

Inventor： RADLER THORSTEN ,  BACH VOLKER ,  TAEGER TILMAN LUDECKE ,  HUFFER STEPHAN ,  SCHROEDER STEFAN ,  CARLE JURGEN

IPC: C14C3/16 ,  C14C3/28

Abstract: A semifinished leather product is produced from an animal hide by pretanning with the use of a chromium-free tanning agent and of a clay mineral which, after stirring for 30 minutes in water at 50° C. at a circumferential rotor speed of from 5 to 25 m/s, has a number average particle diameter of less than 2 μm or a bimodal particle 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, a proportion of the first, finely divided fraction being from 10 to 90% by weight, and drying of the pretanned animal hide to a water content of from 5 to 45%, based on the total weight of the semifinished leather product.

公开(公告)号：AU2003260394A1

公开(公告)日：2004-03-29

申请号：AU2003260394

申请日：2003-08-08

Applicant: BASF AG

Inventor： SCHROEDER STEFAN ,  WAGNER EINHARD ,  RADLER THORSTEN ,  VILL KARL ,  HUFFER STEPHAN

IPC: C14C3/16 ,  C14C3/28

Abstract: Use is claimed as a tanning agent (or an intermediate for a tanning agent) of a clay mineral which, after 30 minutes intensive stirring in water at 50degreesC, gives a laser and light scattering-determined ISO 13320-1 number average particle diameter (D) below 2 mu or a bimodal distribution of (i) 10-90 wt.% of a fraction with D below 0.5 mu and (ii) a coarser fraction of D below 5 mu. An Independent claim is also included for a formulation for use in chromium-free or chrome tanning comprising (a) a clay mineral as above and (b) one or more of an organic polymer, an aldehyde-, sulfone- , resin-, phenol- or vegetable-tanning agent, dubbing material, dye or pigment.