METHOD FOR HYDROPHOBISATION OF LEATHER-FUR SEMI-FINISHED PRODUCT Russian patent published in 2010 - IPC C14C9/00 C14C11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of processing fur material and leather for giving the leather-fur semi-finished product water-repellant properties. The method for hydrophobisation of a leather-fur semi-finished product involves treatment with a fluorine-containing compound. The fluorine-containing compound used is 2,2,3,3,4,4,5,5,6,6,7,7,7-tridecafluoro-N-[3-(triethoxysilyl)propyl]-heptanamide in a solvent medium. The solvent is removed after treatment. The fluorine-containing compound is then fixed by ironing the hair coat of the semi-finished product or by treating the hair coat and/or leather material of the semi-finished product with hot air. The solvent used can be ethanol or supercritical carbon dioxide. If ethanol is used, treatment is done by dipping or spraying the surface of the hair coat and/or leather material of the semi-finished product with a solution of the water-repellent agent using a spray device. The leather-fur semi-finished product used is wool sheepskin.

EFFECT: leather-fur semi-finished product hydrophobisated in accordance with the invention provides good hygienic properties, has water-repellent properties characterised by limiting wetting angle, hygroscopicity, water absorption, moisture-retention capacity and moisture absorption; the hair coat of the hydrophobisated semi-finished product has a pleasant silky texture, and the leather material of the semi-finished product has a soft feel.

21 cl, 9 dwg, 1 tbl, 4 ex