Jo Cosmetics Co., Ltd.

Nissin Chemical Industry Co., Ltd.

Shogo Kato

Kentaro Watanabe

Kazumi Kondo

An aqueous liquid cosmetic containing 1 to 20% by mass of (A) a flake aluminum powder coated with a layer containing a silicon compound; 0.5 to 10% by mass of (B) a polycarboxylic acid-based dispersant having a mass-average molecular weight of 10,000 or less; and 1 to 40% by mass of (C) a film-forming polymer emulsion in terms of a solid content is provide. Normally, the aqueous liquid cosmetic contains at least 40% by mass of water, and further may optionally contain (D) a color pigment as another ingredient. This aqueous liquid cosmetic is suitable for eye makeup applications such as eyeliners, eyebrows, eye colors, and the like.

Aqueous liquid cosmetic

One of the purposes of the present invention is to provide an aqueous dispersion for cosmetics comprising black iron oxide, which has excellent dispersion stability, scarcely causes clogging to a pen type container for a long period of time, achieves good color development as a liquid cosmetic, and is capable of imparting the resulting film with water resistance. The other purpose of the present invention is to provide a liquid cosmetic comprising the aqueous dispersion. The present invention provides an aqueous dispersion comprising a black iron oxide, water and hydroxypropylmethyl cellulose phthalate, wherein the black iron oxide is surface-silylated with an alkyltriethoxysilane. The present invention further provides a method for preparing an aqueous dispersion containing the black iron oxide having a surface-silylated with an alkyltriethoxysilane.

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Tokyo, Japan

Shogo Kato