公开(公告)号：AU3927395A

公开(公告)日：1996-06-06

申请号：AU3927395

申请日：1995-11-03

Applicant: BASF AG

Inventor： BRETH MANFRED ,  CARLE JURGEN ,  BIRKHOFER HERMANN ,  KNEIP MICHAEL

IPC: C14C3/16 ,  C14C3/22 ,  C14C3/28

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.