With Cellulose Liberation Liquor Patents (Class 8/94.31)
  • Aqueous formulation for pretanning raw hides
    Patent number: 6251414
    Abstract: There is disclosed an aqueous formulation for pretanning leather, which formulation comprises (a) a reductive saccharide having a dextrose equivalent of 10 to 100, and (b) an aliphatic dialdehyde containing 2 to 8 carbon atoms, and which is devoid of mineral salts. The leather treated with the novel aqueous composition (wet white leather) is eminently suitable for further processing, especially for the manufacture of leathers which are devoid of heavy metals.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: June 26, 2001
    Assignee: TFL Ledertechnik GmbH & Co. KG
    Inventors: Alain Lauton, Markus Hess, Günter Streicher, Alois Püntener