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US 4,755,187 AGranted
Method for producing waterproof leather
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHans-Herbert Friese, Uwe Ploog, Wolfgang Prinz
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Abstract
A process for leather tanning having the improvement of imparting waterproof properties to the leather by incorporating a sulfosuccinic monoester in the fatliquor.
Claims29
In a process for the tanning of leather, comprising at least the steps of dyeing and/or tanning, retanning, and fatliquoring, the improvement of imparting waterproof properties to said leather by:
- (a) treating said leather, after retanning, with an aqueous fatliquoring composition consisting essentially of a water-proofing effective amount of at least one salt of a C.sub.12-24 aliphatic sulfosuccinic acid monoester or its salt;
- (b) acidifying the treated leather by contacting it with an acidifying effective amount of at least one leather-compatible acid;
- and then,
- (c) fixing the treated and acidified leather by contacting it with a fixing-effective amount of at least one water-soluble chromium salt, or aluminum salt, or a mixture thereof.
1 more element
The process for the tanning of leather, comprising at least the steps of dyeing and/or tanning, retanning, and fatliquoring, the improvement of imparting waterproof properties to said leather by
- (a) treating said leather, after retanning, with an aqueous fatliquor composition containing a waterproofing effective amount of at least one waterproofing agent selected from the group consisting essentially of:
- C.sub.16-18 -alkyl sulfosuccinic acid monoester, Na salt;
- C.sub.16-22 -fatty acid +1 P.O., sulfosuccinic acid monoester, NH.sub.4 salt;
- C.sub.16-24 -alkyl sulfosuccinic acid monoester, Na salt;
- C.sub.16-18 -alkyl sulfosuccinic acid monoester, NH.sub.4 salt;
- and
- C.sub.16-18 -fatty acid +1 P.O., sulfosuccinic acid monoester, NH.sub.4 /Na salt.
4 more elements
Dependencies are inferred from the claim text.