Abstract: Esters of 1,3-dihydroxyethyl group-containing-hydantoins having the structural formula ##STR1## wherein each of R.sub.3 and R.sub.4 separately is hydrogen, lower alkyl, cycloalkyl, or alkoxy and when either or each of R.sub.3 and R.sub.4 is alkyl, cycloalkyl or alkoxy, they jointly have at most 7 carbons, or R.sub.3 and R.sub.4 jointly are the divalent tetramethylene or pentamethylene chain; either one of R.sub.1 and R.sub.2 is hydrogen, and the other one or each of them is acetoyl, benzoyl, isostearoyl, oleoyl, linoleoyl, linolenoyl, or saturated fatty acyl having from 2 to about 22 carbons or a mixture of saturated fatty acyl groups having from 8 to about 22 carbons or a mixture of any of said saturated fatty acyl groups with any of oleoyl, linoleoyl and linolenoyl, palmitoleoyl and myristoleoyl; and each of x and y varies from each of them being 1 to their sum averaging from 2 to about 100; and mixtures of any of said esters.