Abstract: A method for producing a ceramide microparticle dispersion causes a first mixture in a liquid state containing a ceramide and sterols and a second mixture in a liquid state containing water to separately flow, merges the first and second mixtures together, and passes a fluid formed by merging the first and second mixtures together through a small hole having a hole diameter of 0.03 mm or larger and 20 mm or smaller. A mass ratio of a content of a water-soluble organic solvent to a content of the ceramide in the first mixture is 0 or more and 30 or less.

Abstract: A method for manufacturing hydrogel particles includes a step of cooling an aqueous solution, in which a gel agent forming a non-crosslinked hydrogel is dissolved, down to a temperature lower than the gel point of the aqueous solution. In the step of cooling, a cooled substance of the aqueous solution is stirred at least at the gel point, and after the gel point has been reached, a stirring energy of 400 kW·s/m3 or higher is applied to the cooled substance of the aqueous solution with stirring at a required stirring power per unit volume of 0.8 kW/m3 or higher.

Abstract: Disclosed herein is a method for producing hydrogel particles including the steps of: solidifying an aqueous solution in which a gel agent forming a non-crosslinked hydrogel is dissolved and which has a gel point of 30° C. or more by putting the aqueous solution into a liquid phase having a temperature of equal to or lower than the gel point; and crushing a solidified product obtained by solidifying the aqueous solution in which the gel agent is dissolved.

Abstract: Disclosed herein is a method for producing hydrogel particles including the steps of: solidifying an aqueous solution in which a gel agent forming a non-crosslinked hydrogel is dissolved and which has a gel point of 30° C. or more by putting the aqueous solution into a liquid phase having a temperature of equal to or lower than the gel point; and crushing a solidified product obtained by solidifying the aqueous solution in which the gel agent is dissolved.

Abstract: Hydrogel particles include: a continuous phase of non-crosslinked hydrogel; and a dispersed phase dispersed in the continuous phase. The dispersed phase includes a crystalline organic UV absorber and a solid fat having an organic value (OV) of 310 or more and an inorganic value (IV) of 130 or more on an organic conceptual diagram. The content of the crystalline organic UV absorber in the dispersed phase is 15-70 mass %.

Abstract: Hydrogel particles include a continuous phase portion of non-crosslinked hydrogel and disperse phase portions dispersed in the continuous phase portion. Each of the disperse phase portions contains a solid oil and a liquid oil as an oil component, and titanium oxide particles dispersed therein. The solid oil of the oil component contains a higher alcohol and a solid paraffin, and the content of the solid oil in the disperse phase portion is 1 to 12 mass %. The hydrogel particles have a volume-average particle diameter of 10 to 300 ?m.

Abstract: Hydrogel particles include: a continuous phase of non-crosslinked hydrogel; and a dispersed phase dispersed in the continuous phase. The dispersed phase includes a crystalline organic UV absorber and a solid fat having an organic value (OV) of 310 or more and an inorganic value (IV) of 130 or more on an organic conceptual diagram. The content of the crystalline organic UV absorber in the dispersed phase is 15-70 mass %.

Abstract: Hydrogel particles include: (A) a water-insoluble complex containing catechins; (B) a compound which forms chelate together with divalent or trivalent metal ions; (C) a divalent or trivalent metal salt; (D) a gel-forming agent; and (E) water.

Abstract: Hydrogel particles include a continuous phase portion of non-crosslinked hydrogel and disperse phase portions dispersed in the continuous phase portion. Each of the disperse phase portions contains a solid oil and a liquid oil as an oil component, and titanium oxide particles dispersed therein. The solid oil of the oil component contains a higher alcohol and a solid paraffin, and the content of the solid oil in the disperse phase portion is 1 to 12 mass %. The hydrogel particles have a volume-average particle diameter of 10 to 300 ?m.

Abstract: A method for producing a pearly luster composition containing a fatty acid glycol ester, a surfactant, and water, and further containing as a crystallization additive any one selected from the group consisting of (1) a fatty acid, (2) an aliphatic alcohol, (3) a fatty acid monoglyceride, and (4) an aliphatic ether, the method including the step of cooling a molten mixture solution containing the fatty acid glycol ester, the surfactant, water, and the crystallization additive, wherein a representative heat-removal rate per unit mass during crystallization in the cooling step is from 9 to 36 [W/kg]. The pearly luster composition obtained by the method of the present invention can be suitably used for shampoos, conditioners, body shampoos, liquid detergents, and the like.

Abstract: The present invention provides a process for producing 2-(1-hydroxyalkyl)cycloalkanone and/or 2-(1-hydroxyaryl)cycloalkanone in high yield and selectivity, as well as a process using the same to produce a cycloalkanone derivative useful as a perfume material and a physiologically active substance. Disclosed is a process for producing compound (3), which includes subjecting a cycloalkanone, and aldehyde (2) containing carboxylic acid (1), to aldol condensation in the presence of water and a basic catalyst, wherein the molar amount (referred to hereinafter as A) of the basic catalyst added is not less than the molar amount (referred to hereinafter as B) of the carboxylic acid (1) contained in the aldehyde (2) and the difference between A and B, that is, (A?B) is 0.06 mol or less per mol of the aldehyde (2), as well as a process for producing compounds (7) and (8) by using the compound (3) obtained by the above process.

Abstract: The present invention provides a process for producing 2-(1-hydroxyalkyl)cycloalkanone and/or 2-(1-hydroxyaryl)cycloalkanone in high yield and selectivity, as well as a process using the same to produce a cycloalkanone derivative useful as a perfume material and a physiologically active substance. Disclosed is a process for producing compound (3), which includes subjecting a cycloalkanone, and aldehyde (2) containing carboxylic acid (1), to aldol condensation in the presence of water and a basic catalyst, wherein the molar amount (referred to hereinafter as A) of the basic catalyst added is not less than the molar amount (referred to hereinafter as B) of the carboxylic acid (1) contained in the aldehyde (2) and the difference between A and B, that is, (A-B) is 0.06 mol or less per mol of the aldehyde (2), as well as a process for producing compounds (7) and (8) by using the compound (3) obtained by the above process.