| abstract |
PCT No. PCT/GB92/01769 Sec. 371 Date Aug. 3, 1993 Sec. 102(e) Date Aug. 23, 1993 PCT Filed Sep. 25, 1992 PCT Pub. No. WO93/06249 PCT Pub. Date Apr. 1, 1993.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 (HORPRn1Om)xXy wherein R is a C1-C24 alkyl or a C1-C24 alkylene; R1 is a C1-C26 alkyl, a C1-C24 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. |