These surface-treated metal oxide particles are metal oxide particles surface-treated with a silane coupling agent having an alkoxy group, in which the metal oxide particles have an ultraviolet shielding property, a weight loss of the surface-treated metal oxide particles on drying at 105° C. for 3 hours is 0.5% by mass or less, a peak derived from the alkoxy group is not detected in a reflection spectrum of the surface-treated metal oxide particles in 900 cm.sup.−1 to 1300 cm.sup.−1, which is measured by a Fourier transform infrared spectrophotometer, and a value (D98/BET converted diameter) obtained by dividing a dry particle size D98 (μm) thereof by a BET-converted particle diameter (nm) thereof is 0.01 or more and 5.0 or less.

The present invention relates to an emulsion not containing any emulsifying surfactant, in particular to an oil-in-water emulsion not containing any emulsifying surfactant, characterized in that it comprises, especially in a physiologically acceptable medium, at least composite particles comprising a core comprising at least organic or inorganic particles A; said core being covered at the surface, continuously or discontinuously, with an envelope comprising at least organic or inorganic particles B; said particles A and B having different polarities.

The present invention also relates to the use of the composite particles as defined previously as emulsion stabilizer, in particular as stabilizer for an emulsion not containing any emulsifying surfactant, and more particularly as stabilizer for an oil-in-water emulsion not containing any emulsifying surfactant.

The present invention also relates to a cosmetic process for treating a keratin material, which consists in applying to the keratin material an emulsion as defined previously.

Particles are prepared in an emulsion using a method that includes providing a first reactant having at least two unsaturated carbon-carbon moieties and a second reactant having at least two Si—H moieties, so long as at least one of the unsaturated carbon-carbon moieties of the first reactant or the Si—H moieties of the second reactant is pendant. The method also includes providing a third reactant having a silicon atom and a condensable reactive group bonded to the silicon atom and also having an unsaturated carbon-carbon moiety and/or a Si—H moiety, providing a hydrosilylation catalyst, and providing a polar liquid. The method further includes combining the first, second, and third reactants to form particles that have a cross-linked network wherein the condensable reactive group is disposed on the particles, and adding a silane having an organic moiety and a condensation leaving group to form the particles.

An embossed effect pigment includes a metallic substrate in platelet form with embossed structure having a periodic pattern with diffractive elements, said substrate having been produced by PVD methods, wherein the substrate has an elemental metal content of 80% to 100% by weight, based on the substrate, and wherein the effect pigment has been treated with a leafing additive for surface modification. A method of manufacture of an embossed effect pigment includes suspending a metallic substrate in in at least one solvent, adding a leafing additive to the suspension including the metallic substrate in the at least one solvent and stirring the suspension including the leafing additive, and separating the embossed effect pigment from the at least one solvent.

Provided is a treated platy substrate, a method of making it, and methods of using it. The substrate can be synthetic mica, optionally comprising metal-oxide layers. The treated platy substrate is useful in cosmetic compositions.

A composition for external preparation for skin including the following components (A), (B), and (C). (A) includes from 1 to 30 mass % of a polymer having a silicone moiety in which a ratio of deformation is 0.3 or more and 1 or less, and in a bend resistance test using a cylindrical mandrel method a minimum diameter of a cylindrical mandrel which causes no cracks in a polymer film is 2 mm or longer and 25 mm or shorter. (B) includes a volatile oil having a volatilization rate of 14% or more after drying at 1 atmosphere, at 40° C., and an R.H. of 60% for 30 minutes. (C) includes a cation-modified clay mineral and a mass ratio of the component (A) to the component (C), (A)/(C), is from 5 to 23.

A water-in-oil emulsified sunscreen cosmetic including the following components (A1), (A2), (B), and (C), with a content of (D) a non-volatile silicone oil being 0.1 mass % or more and 4 mass % or less, (A1) 5 mass % or more of a hydrophobized titanium dioxide fine particle, (A2) 10 mass % or more of a hydrophobized zinc oxide fine particle, (B) a divalent polyol, and (C) 2 mass % or more and 14 mass % or less of a non-volatile hydrocarbon oil, wherein each mass % is with respect to 100 mass % of the water-in-oil emulsified sunscreen cosmetic.

A composition, in particular a cosmetic composition, for making up and/or caring for keratin materials, including at least one aqueous phase gelled with at least one non-starchy hydrophilic gelling agent; at least one oily phase gelled with at least one non-cellulose-based lipophilic gelling agent other than apolar hydrocarbon-based waxes with a melting point of greater than 75.0° C. and silicone polyamides; the phases forming therein a macroscopically homogeneous mixture; the composition also including at least one UV-screening agent.

The subject of the present invention is a cosmetic composition of oil-in-water type comprising: (1) hydrophobic silica aerogel particles having a specific surface area per unit of mass (S.sub.M) ranging from 500 to 1500 m.sup.2/g and a size, expressed as volume-average diameter (D[0.5]), ranging from 1 to 1500 μm ; (2) at least one gemini surfactant of formula (I): ##STR00001##
in which R.sub.1 and R.sub.3 denote, independently of one another, an alkyl radical containing from 1 to 25 carbon atoms; R.sub.2 denotes a spacer consisting of a linear or branched alkylene chain containing from 1 to 12 carbon atoms; X and Y denote, independently of one another, a —(C.sub.2H.sub.4O).sub.a—(C.sub.3H.sub.6O).sub.bZ group; n ranges from 1 to 10 ; and (3) at least one fatty phase comprising at least one fatty substance chosen from solid fatty substances and pasty fatty substances. The composition in accordance with the invention makes it possible to make good the lack of cutaneous lipids in dehydrated skin, and to provide comfort and persistent nutrition, while at the same time having sensory properties, for example a non-greasy and non-tacky effect and a matt skin appearance, and also good skin penetration properties, even with a high level of solid fatty substance.

A reduction treatment agent made of a powder with a particle size within a range of 1500 to 3000 mesh, the powder containing: 20 to 40 parts of a mixed-oxide powder containing magnesium oxide and zinc oxide; and 60 to 80 parts of an organic acid powder containing calcium, ascorbic acid, citric acid and salt. The reduction treatment agent may further contain one to six kinds of metal powder selected from the group of copper, molybdenum, nickel, cobalt, iron and aluminum, each in an amount of one part. Due to this configuration, the reduction treatment agent can be easily mixed with various substances when added to those substances. Even if the target substance is not water, the agent can entirely and uniformly change that substance into a reduced state. Additionally, the reduction treatment agent can act as a surfactant, and therefore, can be used as cosmetics or food.