Process for tanning hides and compounds for use therein

摘要

PCT No. PCT/AU92/00154 Sec. 371 Date Oct. 7, 1993 Sec. 102(e) Date Jan. 18, 1994 PCT Filed Apr. 9, 1992 PCT Pub. No. WO92/18456 PCT Pub. Date Oct. 29, 1992.An organic polyol ester of a polycarboxylic acid having formulae (Para) and/or (Meta) and/or (Ortho), wherein R6 is -(COOR1)x, or (I)1R7 is H; or R6 and R7 together for (II); R1 and R2 are hydrogen or -OR1 and -OR2 together form an anhydride (-0-) bond; x is an integer of 0 or 1; Z is an integer ranging from 1 to the number of hydroxy groups on the polyol and D is a polyol residue. Also disclosed are processes for the preparation of these polyol esters, a tanning composition comprising a metallic salt and a polyol ester, and a method of tanning using said composition.