A method for preparation of oil-in-water type cosmetic containing retinoids having improved stability

摘要

PURPOSE: A manufacturing process for hydrophilic cosmetic material containing stability-improved retinoid is provided, which maintains 82% of retinoid after storing the hydrophilic cosmetic material for 4weeks at 45deg.C. CONSTITUTION: The manufacturing process for hydrophilic cosmetic material containing stability-improved retinoid comprises the steps of: (1) mixing surfactant showing phase-reverse temperature at 45deg.C 0.5-20wt.%, fatty alcohol 0.1-10wt.% and cholesterol 0.1-10wt.%, adding distilled water at 70deg.C, mixing to emulsify, and adding retinoid as inner phase, cooling to room temperature to get SWLC(Super Wide Liquid Crystal) base of 3,000-50,000nm size; (2) emulsifying by adding surfactant for forming liquid-crystal to water phase, cooling to room temperature, and adding water-soluble polymer to get gel-type base; and (3) mixing the SWLC base of (1) to the gel-type base of (2) to get the hydrophilic cosmetic material.