The invention relates to a high-power
sunscreen lotion and a preparation method thereof. The high-power
sunscreen lotion is a
silicone oil-in-water
emulsion. The composition comprises a continuous
oil phase, a dispersed water phase, a
solid-phase component and a film-forming agent, the
mass ratio of the water phase to the
oil phase is (1: 10)-(1: 1); the continuous
oil phase comprises
silicone oil and a chemical sun-screening agent, and the chemical sun-screening agent comprises an oil-soluble chemical sun-screening agent; the dispersed aqueous phase comprises water and a water-soluble chemical sun-screening agent; the
solid-phase component is dispersed in the continuous oil phase; the
solid phase component comprises a physical sun-screening agent for
silicon surface treatment and a
powder composite sun-screening agent; the
powder composite sun-screening agent is composite particles of porous silica loaded with a chemical sun-screening agent; the film-forming agent is a
silane film-forming
polymer which is dissolved or swelled in a continuous oil phase; the film-forming agent, the continuous oil phase and the solid phase jointly form a three-dimensional network, so that a continuous, uniform and water-resistant sunscreen film can be formed on the surface of
skin after the sunscreen is smeared and dried; in addition, when the smearing amount of the
sunscreen lotion is 1mg / cm < 2 >, the SPF value is not lower than 50.