| 摘要 |
PCT No. PCT/EP91/01995 Sec. 371 Date Jun. 30, 1993 Sec. 102(e) Date Jun. 30, 1993 PCT Filed Oct. 21, 1991 PCT Pub. No. WO92/07962 PCT Pub. Date May 14, 1992.The invention is an aqueous softening filler for leather and a process for softening leather which utilizes the softening filler. The softening filler comprises thermoexpansible microcapsules. The thermoexpansible microcapsules are impregnated into the leather from an aqueous dispersion or from a mixture containing the thermoexpansible microcapsules and fat liquor. After the leather is impregnated with the thermoexpansible microcapsules, the leather is heated to a temperature above which the thermoexpansible microcapsules expand. The process improves the softness of the leather.
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