Use of aqueous solutions or dispersions of copolymers of carboxyl-group-containing monomers, ethylenically unsaturated acetals, ketals or orthocarboxylic acid esters and optionally other copolymerizable monomers as leather tanning agents
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United States of America Patent
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Mar 7, 2000
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N/A
app pub date -
Jun 10, 1998
filing date -
Dec 12, 1995
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Expired
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Abstract
The use of aqueous solutions or dispersions of copolymers composed of A) from 5 to 95 mol % of ethylenically unsaturated mono- or dicarboxylic acids having 3 to 10 carbons, their anhydrides, their alkali metal, alkaline earth metal or ammonium salts, or mixtures thereof, B) from 5 to 95 mol % of ethylenically unsaturated acetals, ketals or orthocarboxylic esters of the formula I ##STR1## where R.sup.1 to R.sup.12 independently are hydrogen or an organic radical and a to d independently are 0 or 1, and C) from 0 to 70 mol % of other copolymerizable monomers or their hydrolysis products or polymer-analogous reaction products, as tanning agents for the self-tanning, pretanning or assist tanning of leather pelts and skin pelts or for the retanning of leather and skins.
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