1
Kleban Martin Dr, Kaplan Ahmet, Reiners Juergen Dr, Winther Henrik: Chrome free waterproof leather. Bayer Chemicals, May 6, 2004: EP1416057-A1 (1 worldwide citation)

Chromium-free leather has a water-proofness measured as DIN 53338 penetration time of at least30 minutes. Independent claims are also included for the use of silicones as hydrophobicizers for chromium-free tanned leather; and production of the leather by treating with a hydrophobicizer, optionally a ...


2
Kleban Martin Dr, Kaplan Ahmet, Markgraf Kirsten Dr, Tegtmeyer Dietrich Dr, Whiteman John D: Condensation products for the retanning of iron-tanned leather. Bayer Chemicals, Rohm & Haas, May 6, 2004: EP1416058-A1 (1 worldwide citation)

Use is claimed in the post-tanning of iron-tanned leather of condensation products of (A) sulfonated aromatics; (B) aldehydes or ketones; and optionally also (C) non-sulfonated aromatics, urea or urea derivatives with the proviso that the content of naphthalenesulfonic acid-formaldehyde condensates ...


3
Kleban Martin, Kaplan Ahmet, Reiners Juergen, Winther Henrik: Chromium-free waterproof leather, preparation method thereof and use of silicone as waterproofing agent for chromium-free waterproof leather. Bayer Aktiengesellschaft, May 8, 2004: KR1020030075025

PURPOSE: Provided are a tanned waterproof leather which is free from chromium for preventing environmental pollution, its preparation method and a use of silicone as a waterproofing agent for a chromium-free tanned leather. CONSTITUTION: The chromium-free waterproof leather has a penetration time of ...


4
Kleban Martin, Kaplan Ahmet, Markgraf Kirsten, Tegtmeyer Dietrich, Whiteman John D: Condensate for re-tanning iron-tanned leather, preparation method of leather using the condensate and leather prepared by the method to improve ductility of leather. Bayer Aktiengesellschaft, Rohm And Haas Company, May 8, 2004: KR1020030074985

PURPOSE: A condensate for re-tanning an iron-tanned leather, a method for preparing leather by using the condensate and leather prepared by the method are provided, to improve ductility, body and color of leather. CONSTITUTION: The condensate is prepared from a sulfonated aromatic compound, an aldeh ...