| 摘要 |
PURPOSE:The titled base, containing sterol ester of lanolin fatty acid as an active constituent, having improved emulsifiability, water holding and humectant properties, easily compatible with the skin, giving softness and moisture to the skin, and readily adsorbable without allergic problems. CONSTITUTION:A cosmetic base containing sterol ester of lanolin fatty acid as an active constituent. The above-mentioned active constituent is obtained by esterifying lanolin fatty acid with sterol. The esterification reaction is carried out by heating a mixture of the lanolin fatty acid with the sterol at about 100- 250 deg.C in the absence or presence of a catalyst, e.g. p-toluenesulfonic acid or tin chloride. The lanolin fatty acid has about 21 average carbon atoms and about 320 average molecular weight, and consists of a branched fatty acids such as isofatty acids or anteiso fatty acids and hydroxy fatty acids. Cholestero is preferably used as the sterol. |
