METHOD FOR PREPARING PAEONIA LACTIFLORA EXTRACTS CONTAINING TAXIFOLIN-3-GLUCOSIDE AND COSMETIC COMPOSITION CONTAINING PREPARING PAEONIA LACTIFLORA EXTRACTS

摘要

PURPOSE: A cosmetic material and an external use skin composition containing a Paeonia lactiflora extract with high content taxifolin are provided to improve whitening, anti-wrinkling, anti-inflammatory, and antibacterial effects, to treat atopic dermatitis, and protect skin from UV ray. CONSTITUTION: A method for preparing a Paeonia lactiflora extract containing taxifolin comprises the steps of: extracting Paeonia lactiflora with a solvent; drying the extract by reduced pressure and concentrating to obtain primarily concentrated powder; dissolving the primarily concentrated powder in water and adding an organic solvent to fraction according to polarity; removing the solvent and concentrating to obtain a secondarily concentrated powder; dissolving the secondarily concentrated powder in a solution and removing pigments and chlorophyll using a column; crystallizing the extract at ultralow temperature or ultra high pressure; and spray-drying or freeze-drying the recrystallized extract to obtain powdery Paeonia lactiflora extract containing taxifolin-3-glucoside. [Reference numerals] (AA) Extraction step of eluting taxifolin-3-glucoside from Paeonia lactiflora; (BB) Concentration step of drying the eluted extract by reduced pressure; (CC) Fraction step of isolating the concentrated extract by polarity; (DD) Concentration step for removing an organic solvent from the fraction liquid; (EE) Column step for removing pigments and chlorophyll from the concentrated fractioned powder; (FF) Recrystallizing step of precipitating the column liquid using temperature and pressure; (GG) Step of acquiring recrystallized precipitate