This invention proposes a lanolin substitute, capable of absorbing up to at least twice its weight of water or aqueous solution or aqueous suspension. It forms true emulsions, stable over time with a capacity for water absorption superior to that of lanolin.It also possesses the known emollient, moisturizing and occlusive properties of lanolin.This substitute is usable in all the present and future areas of application of lanolin: in the cosmetics industry, dermatology, and in industrial applications (polishes, lubricants . . . ).It is obtained by hemi-synthesis from a mixture of unsaturated fatty acids, esters of unsaturated fatty acids, unsaturated hydrocarbons or unsaturated derivatives of the latter and compounds comprising or generating hydroxyl functions, such as glycerol, preferably without a catalyst and in an atmosphere devoid of oxygen.Classical thermal treatment or preferably treatment by dielectric heating.
