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Abstract

The present invention is to provide an oil-in-water emulsion cosmetic having excellent in emulsion stability, temporal emulsion stability, and feeling in use such as the free of stickiness. An oil-in-water emulsion cosmetic is characterized by comprising the following components (a) to (d):

(a) one or more amphipathic substances selected from (a1) to (a3): (a1) an amphipathic protein,(a2) a copolymer of 2-acrylamido-2methylpropane sulfonic acid or a salt thereof and vinylpyrrolidone,(a3) a microgel that is obtained, in the dispersing phase, by radical polymerization of water-soluble ethylenically unsaturated monomers dissolved in the dispersing phase of the composition wherein an organic solvent or oil is the dispersion medium and water is the dispersing phase, and the microgel is obtained by radical polymerization of dimethylacrylamide and 2-acrylamido-2-methylpropane sulfonic acid under the conditions that the microgel forms a one-phase microemulsion or a fine W/O emulsion with a surfactant, (b) particles with the average particle size of less than 500 nm,(c) an oil component, and(d) an aqueous component.

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First Claim