PROBLEM TO BE SOLVED: To provide a skin care preparation obtained by mixing silver ion-carrying antimicrobial zeolite with water and a polymer having a polyacrylic acid amide skeleton, which has remarkably improved dispersion stability of silver ion-carrying antimicrobial zeolite powder without causing discoloring and a liquid skin care preparation especially mixed with a large amount of water, which secures discoloration stability and/or dispersion stability and is stable.SOLUTION: The skin care preparation comprises the polymer having the polyacrylic acid amide skeleton that is a thickener composed of microgel obtained by dissolving dimethylacrylamide and 2-acrylamide-2-methylpropanesulfonic acid or its salt in a dispersion phase and performing radical polymerization in the dispersion phase in a composition comprising an organic solvent or an oil as a dispersion medium and water as the dispersion phase under a condition that the composition contains a surfactant and forms a single phase microemulsion or a fine W/O emulsion.COPYRIGHT: (C)2012,JPO&INPIT【課題】銀イオン担持抗菌性ゼオライトと水とポリアクリル酸アミド骨格を有する重合体を配合する皮膚外用剤において、その変色を引き起こさずに、銀イオン担持抗菌性ゼオライト粉末の分散安定性を著しく向上せしめた皮膚外用剤であり、特に水を多量に配合した液状の皮膚外用剤において、変色及び/又は分散安定性を確保する安定な皮膚外用剤の提供。【解決手段】ポリアクリル酸アミド骨格を有する重合体が、有機溶媒若しくは油分を分散媒とし水を分散相とする組成物において、前記組成物が界面活性剤を含有し一相マイクロエマルションあるいは微細W/Oエマルションを形成する条件下において、ジメチルアクリルアミドと2-アクリルアミド2-メチルプロパンスルホン酸又はその塩とを分散相に溶解し分散相中にてラジカル重合して得られるミクロゲルからなる増粘剤皮膚外用剤。【選択図】図1
