Leather treatment and process for treating leather
AssigneeDaikin Industries, Ltd.
InventorsTetsuya Masutani, Masahiko Maeda, Norio Yanagisawa, Masato Kuroi
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Abstract
A tanned leather treated with a fatliquoring agent in combination with a fluorine-containing oil, which has good touch, water resistance, water- and oil-repellency, washing resistance, and which is not discolored or faded by dry cleaning.
Claims32
A leather treatment composition comprising a fatliquoring agent and a fluorine-containing oil, wherein said fluorine-containing oil is at least one stable oil selected from the group consisting of a perfluoropolyether comprising repeating units of the formula:
- ##STR10## a perfluoropolyether comprising repeating units of the formula:
- ##STR11## wherein p, q and r are integers the sum of which is not smaller than 2 and not larger than 200, a poyfluoroether comprising repeating units of the formula:
- --(CH.sub.2 CH.sub.2 CH.sub.2 O).sub.a --(CHClCF.sub.2 CF.sub.2 O).sub.b -(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c --
- (CHFCF.sub.2 CF.sub.2 O).sub.d --(CFClCF.sub.2 CF.sub.2 O).sub.e --(CF.sub.2 CF.sub.2 CF.sub.2).sub.f --
- wherein a, b, c, d, e and f are 0 or positive integrs and satisfy the equations:
- 2.ltoreq.a+b+c+d+e+f.ltoreq.200 and a+c+d+f .gtoreq.1, and a compound comprising repeating units of the formula:
- [--(CF.sub.2 CFCl).sub.n --]--(CF.sub.2 CFCl)--
A process for treating leather, comprising treating leather with a leather treatment comprising a fatliquoring agent and a fluorine-containing oil, wherein said fluorine-containing oil is at least one stable oil selected from the group consisting of a perfluoropolyether comprising repeating units of the formula:
- ##STR19## a perfluoropolyether comprising repeating units of the formula:
- ##STR20## wherein p, q and r are integers the sum of which is not smaller than 2 and not larger than 200, a polyfluoroether comprising repeating units of the formula:
- --(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a --(CHClCF.sub.2 CF.sub.2 O).sub.b --(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c --(CHFCF.sub.2 CF.sub.2 O).sub.d --(CFClCF.sub.2 CF.sub.2 O).sub.e --(CF.sub.2 CF.sub.2 CF.sub.2).sub.f --
- wherein a, b, c, d, e and f are 0 are positive integers and satisfy the equations:
- 2.ltoreq.a+b+c+d+e+f.ltoreq.200 and a+c+d+f .gtoreq.1, and a compound comprising repeating units of the formula:
- [--(CF.sub.2 CFCl).sub.n --]--(CF.sub.2 CFCl)--
A process for treating a leather comprising fatliquoring a leather and then treating a fatliquored leather with a leather treatment composition which comprises a fluorine-containing oil.
Dependencies are inferred from the claim text.