Method to treat animal skins prior to tanning
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United States of America Patent
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Dec 27, 1994
Grant Date -
N/A
app pub date -
May 21, 1993
filing date -
Sep 27, 1991
priority date (Note) -
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Abstract
A method for treating animal skins, prior to tanning including contacting animal skins with an aqueous degreasing solution containing brine and an effective amount of a shrink inhibitor, the shrink inhibitor being (a) at least one hydroxyalkyl phosphine compound of the formula (HORPR.sub.n.sup.1 O.sub.m).sub.x X.sub.y wherein R is a C.sub.1 -C.sub.24 alkyl or a C.sub.1 -C.sub.24 alkylene; R.sup.1 is a C.sub.1 -C.sub.26 alkyl, a C.sub.1 -C.sub.24 alkenyl or ROH; X is an anion, whereby the hydroxyalkyl phosphine compound is at least sparingly soluble in water; x is a whole number equal to the valency of X; n=2 or 3 and m=0 or 1, whereby (n+m)=2 or 3; y=0 or 1, whereby (n+y)=2 or 4; or (b) a condensate of at least one of the compound (a), the condensate being at least sparingly water-soluble.
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