Products of the polyaddition of propylene - oxide, containing carboxyl groups, their process of preparation and their use as auxiliary dye products

摘要

A propylene oxide polyadduct containing carboxyl groups, or a salt thereof, obtained from (a) an adduct of propylene oxide and an aliphatic alcohol having 3 to 10 carbon atoms which is at least trihydric, (b) an aliphatic dicarboxylic acid or the anhydride thereof having 2 to 10 carbon atoms or a mono- or di-lower alkylester of said dicarboxylic acids, (c) an aliphatic diol having an average molecular weight of at most 2,000, (d) a fatty acid having 8 to 22 carbon atoms and (e) an aromatic dicarboxylic acid or the anhydride thereof having 8 to 12 carbon atoms; it is in particular useful as dyeing assistant for the dyeing of fibrous material made of or containing wool with anionic dyes.