| abstract |
PCT No. PCT/EP92/02525 Sec. 371 Date May 13, 1994 Sec. 102(e) Date May 13, 1994 PCT Filed Nov. 4, 1992 PCT Pub. No. WO93/10072 PCT Pub. Date May 27, 1993Esters of fatty acids with ethoxylated polyols are prepared by (a) ethoxylating polyols in the presence of basic catalysts at high temperatures with 80 to 150 moles ethylene oxide per mol polyol and then (b) reacting the reaction product with 1 to 1.3 moles fatty acids per mole of hydroxyl groups contained in the original polyol, in the presence of acid catalysts. These esters are useful as thickeners of aqueous solutions of surface active agents. |