Abstract: A water-in-oil emulsion composition includes: an external oil phase, in which a first hydrophobic powder is dispersed; and an internal aqueous phase, in which a second hydrophobic powder is dispersed, in which, among the first hydrophobic powder and the second hydrophobic powder, at least the second hydrophobic powder is a metal oxide treated with trimethylethoxysilane, in which the water-in-oil emulsion composition further includes a dispersant that disperses the second hydrophobic powder in the internal aqueous phase, and in which the dispersant is at least one of a silicone-based surfactant and a cationic surfactant.

Abstract: 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 (A) an ultraviolet protectant; and (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; wherein the (B) (i) alkylene oxide derivatives are polyoxyalkylene/polyoxyethylene copolymer dialkyl ethers represented by the following formula (I): R1O-[(AO)m(EO)n]—R2??(I) wherein R1 and R2, each independently, denote a hydrogen atom or a hydrocarbon group having one to four carbon atoms, AO denotes an oxyalkylene group having three or four carbon atoms, EO denotes an oxyethylene group, 1?m?70, 1?n?70 and m+n?40; and the oil-based cosmetic has a water content of 5% by mass or less.

Abstract: 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.

Abstract: 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.

Abstract: 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° C.

Abstract: An objective of the present invention is to provide 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 prescribed alkylene oxide derivative, and (C) an ester oil.

Abstract: 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 (A) an ultraviolet protectant; and (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; wherein the (B) (i) alkylene oxide derivatives are polyoxyalkylene/polyoxyethylene copolymer dialkyl ethers represented by the following formula (I): R1O-[(AO)m(EO)n]—R2 ??(I) wherein R1 and R2, each independently, denote a hydrogen atom or a hydrocarbon group having one to four carbon atoms, AO denotes an oxyalkylene group having three or four carbon atoms, EO denotes an oxyethylene group, 1?m?70, 1?n?70 and m+n?40; and the oil-based cosmetic has a water content of 5% by mass or less.

Abstract: 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.

Abstract: 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 (1) a step of preparing a sample composition containing (A) an ultraviolet protectant and (B) one or more humectants that have an IOB of 5.

Abstract: 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.

Abstract: 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° C.