Dilutable aluminum triformate tanning agents in the form of highly concentrated, storable aqueous solutions and their use
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Mar 14, 1994
filing date -
Jul 15, 1991
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Abstract
Described is the use of at least substantially storage-stable supersaturated and acidified aqueous solutions of mixtures of aluminum triformate and alkali-metal and/or alkaline-earth formates as a means of supplying a water-dissolved mineral tanning agent based on aluminum formate for the tanning of leather and/or hides using little or no chromium. The invention thus concerns, in particular, storage-stabilized supersaturated and acidified aqueous solutions of this kind which also contain small quantities of stabilizers, preferred stabilizers being 1,2,3,4-butanetetracarboxylic acid and/or xanthane gum. The invention also concerns the use of such stabilized supersaturated aqueous forms of aluminum triformate solutions for use as tanning auxiliaries with a fixing and/or tanning action in the tanning or finishing of leather and hides.
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