| abstract |
(57) [Summary] [Structure] A 5-allylpentadienoic acid silicon derivative represented by the general formula 1 (wherein A is a substituent represented by the formula 2), an ultraviolet absorber and one or more kinds thereof. A skin external preparation containing. [Chemical 1] [Chemical 2] [Effect] The 5-allylpentadienoic acid silicon derivative of the present invention is oily at room temperature, exhibits high solubility in nonpolar oils, and has excellent water resistance and UV-A absorption ability. Therefore, by blending the above-mentioned derivative, it is possible to obtain an external preparation for skin which is excellent in ultraviolet protection effect, water resistance, feeling of use and product stability. |