Shiseido Company, Limited

Kei Ujimoto

Kouichi Nagai

Yuko Nagare

Satoshi Yamaki

Marianne Ayaka Touati

Ryoya Ito

Keita Nishida

Takumi Kurashima

Momoka Kojiri

Toshihiko Matsukura

An objective of the invention is to provide a water-in-oil emulsion skin cosmetic having the property wherein contact with moisture, such as water or perspiration, increases the ultraviolet protection effects over those immediately after application, and also having an excellent feeling in use. The present invention relates to a water-in-oil emulsion skin cosmetic comprising (A) (a-1) a copolymer having silanol groups, and oxypropylene groups (PO) or oxyethylene groups (EO), and/or (a-2) a silylated peptide; and (B) an ultraviolet protectant.

Water-in-oil emulsion cosmetic preparation for skin

Provided is an emulsion cosmetic having the innovative, unprecedented property in which the ultraviolet protection effects do not decrease, and conversely increase, due to heat applied in a usage environment. The present invention pertains to an emulsion cosmetic comprising (A) an ultraviolet protectant, (B) a polyhydric alcohol having an IOB value of 5.0 or lower, and (C) an ester oil having an IOB value of 0.3 or higher.

Emulsion cosmetic

The present invention relates to a cosmetic in which the ultraviolet protection effects are increased by heat, and a method for manufacture thereof. The manufacturing method of the present invention includes

Cosmetic product

The present invention relates to an oil-based cosmetic having the innovative, unprecedented property in which the ultraviolet protection effects increase due to heat. The oil-based cosmetic of the present invention contains

Oil-based cosmetic

The present invention relates to a cosmetic having the innovative, unprecedented property in which the ultraviolet protection effects do not decrease, but conversely increase, due to coming into contact with moisture such as water or perspiration, and due to heat applied in the usage environment. The cosmetic of the present invention contains (A) an ultraviolet protectant; (B) at least one compound that is water-soluble and that has an IOB of 5.0 or lower, selected from among (i) alkylene oxide derivatives and (ii) polyhydric alcohols; and (C) an oil phase thickener; wherein 

Cosmetic preparation

The purpose of the present invention is to newly provide a method with which it is possible to appropriately evaluate the protective effect of an external preparation for skin such as a sunscreen cosmetic, particularly to evaluate how a UV-ray protective effect is affected by heat. This evaluation method is characterized by including (1) a step for forming a coating film of an external preparation for skin on a substrate, (2) a step for heat-treating the coating film of the external preparation for skin, and (3) a step for measuring the UV-ray protective effect of the heat-treated coating film of the external preparation for skin. The heat treatment is preferably carried out for at least one minute at a temperature of 30-70&#xb0; C. The step for measuring the UV-ray protective effect preferably includes at least one selected from testing methods that involve comparing some kind of UV-ray protective effect with SPF measurement, UVAPF or PFA measurement, critical wavelength measurement, absorbance measurement, and transmittance measurement. This evaluation method can also be performed in vivo or in vitro.

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Kanagawa, Japan

Kei Ujimoto