公开(公告)号：BR0315817A

公开(公告)日：2005-09-13

申请号：BR0315817

申请日：2003-11-25

Applicant: BASF AG

Inventor： HUEFFER STEPHAN ,  SCHROEDER STEFAN ,  CARLE JUERGEN ,  RODLER THORSTEN ,  BACH VOLKER ,  TAEGER TILMAN LUEDECKE

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：BR0313072A

公开(公告)日：2007-07-17

申请号：BR0313072

申请日：2003-08-08

Applicant: BASF AG

Inventor： HUEFFER STEPHAN ,  SCHROEDER STEFAN ,  WAGNER EINHARD ,  RODLER THORSTEN ,  VILL KARL

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.

公开(公告)号：BRPI0406655A

公开(公告)日：2005-12-06

申请号：BRPI0406655

申请日：2004-01-28

Applicant: BASF AG

Inventor： LUNKWITZ RALPH ,  DANISCH PETER ,  RODLER THORSTEN ,  JANSON WERNER ,  SATTLER FRIEDRICH

IPC: C14C9/02

Abstract: Water repellency is imparted to leather and fur skins by a process in which leather or fur skin is treated, before, during or after the retanning, with one or more formulations comprising from 1 to 30% by weight, based on the formulation, of a mixture of polysiloxanes comprising from 10 to 90% by weight, based on the mixture, of one or more carboxyl-containing polysiloxanes, from 90 to 10% by weight, based on the mixture, of one or more carboxyl-free polysiloxanes and from 3 to 25% by weight, based on the formulation, of at least one emulsifier.