| abstract |
Provided are core-corona polymer particles that are superior in terms of emulsion stability and the sensation upon the use thereof, a cosmetic ingredient using said particles, and an oil-in-water emulsion cosmetic.　The core-corona polymer particles are obtained by radical polymerization, under (A) to (D) conditions, of a polyethylene oxide macromonomer represented by general formula (1) and of one or more hydrophobic monomers represented by general formulas (2) and (3). |