olefinically unsaturated fatty alcohol preferably from 12 to 18 carbon atoms are present therein c a c 1 c 3 alkyl ester of a c 8 c 24 mono or di olefinically unsaturated fatty acid preferably the fatty acid portion thereof contains from 12 to 18 carbon atoms the methyl ester is preferred although the ethyl and propyl esters can also be employed d a glyceride of a c 8 c 24 mono or di olefinically unsaturated fatty acid preferably the fatty acid portion contains from 12 to 18 carbon atoms the glyceride can be a mono di or triglyceride e a c 8 c 24 mono or di olefin preferably containing from 12 to 18 carbon atoms the introduction of one or more epoxide groups is carried out in known manner for example by reacting the above compounds with hydrogen peroxide in the presence of formic acid the above compounds are preferably substantially fully epoxidized although compounds that contain at least one epoxy group and contain remaining unsaturation can also be used herein preferred compounds for use herein are the fully epoxidized products of unsaturated c 12 c 18 fatty acids unsaturated c 12 c 18 fatty alcohols and c 1 c 3 esters of unsaturated c 12 c 18 fatty acids for example unsaturated c 12 c 18.