Hoechst Aktiengesellschaft

Hubert Herdt

Rolf Kleber

Karl Hintermeier

Frank Wehowsky

Werner Lotz

Manfred Muller

Heinrich Bathelt

Winfried Ehrl

Jan-Hilbert Mast

Josef Hurt

Lothar Jackel

Wolfgang Glenz

The invention relates to a process for dyeing fur skins with oxidation dyes following a pretreatment, which comprises pretreating the fur skins with a metal mordant that contains glyoxylic acid.

Process for dyeing fur skins with oxidation dyes

The novel urethanes correspond to the formula I below ##STR1## in which a denotes a number from 5 to 17 and b denotes a number from 1 to 7. These urethanes are prepared by reacting the corresponding perfluoroalkylethanol/epichlorohydrin adducts with toluelene diisocyanates. The novel aqueous dispersions are essentially composed of the novel urethanes, cationic or betaine emulsifiers and non-ionic emulsifiers, water-insoluble carboxylic and/or dicarboxylic acid esters and alkanediols or polyalkanediols which can be etherified on one or both sides, in water. The novel urethanes and the novel aqueous dispersions are used to impart an oleophobic and hydrophobic finish to textiles, leather and furs. They are also suitable for the treatment of unpainted timber, for example unpainted furniture.

Urethanes containing perfluoroalkyl and epichlorohydrin groups

Growing community of inventors

Offenbach, Germany

Hubert Herdt