MIXTURE CONTAINING HOLLOW MICROSPHERES AND SOFTENING RETANNING AGENT, ITS USE FOR RETANNING LEATHER

Retanning leather comprises: (a) treating a tanned leather in aqueous liquor in the presence of hollow micro spheres filled with blowing agent, (b) drying the leather obtained in step (a) after further optional retanning steps and (c1) treating with hot water steam at 80-120[deg] C, preferably at 80...

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Bibliographic Details
Main Authors VORLAENDER, OTTO, TEGTMEYER, DIETRICH, ZEYEN, WERNER, REINERS, JUERGEN
Format Patent
LanguageEnglish
French
German
Published 30.05.2012
Subjects
APPARATUS THEREFOR
CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING,IMPREGNATING, FINISHING
CHEMISTRY
COMPOSITIONS FOR TANNING
HIDES
LEATHER
METALLURGY
PELTS
SKINS
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Summary:Retanning leather comprises: (a) treating a tanned leather in aqueous liquor in the presence of hollow micro spheres filled with blowing agent, (b) drying the leather obtained in step (a) after further optional retanning steps and (c1) treating with hot water steam at 80-120[deg] C, preferably at 80-100[deg] C, or (c2) treating with infrared radiation having a wavelength of 0.7-100 mu m, where a finishing step (b1) and/or a milling step (b2) can be carried out, after the drying step (b). Independent claims are included for: (1) the leather obtained by the process; and (2) a mixture containing micro hollow balls filled with blowing agent, preferably a liquid having boiling point of less than 60[deg] C in normal pressure and chrome tanning agent and/or synthetic retanning agent.
Bibliography:Application Number: EP20100197154