Particles obtainable by polymerization of a siloxane which has at least one (meth)acrylate group of the formula (I)
—O—C(O)—CR═CH.sub.2  (I)
where R=—H or —CH.sub.3, which are characterized in that the siloxane has an average molar ratio of groups of the formula (I) to Si atoms of less than 0.1 are provided.

A hydrophilic inorganic powder having excellent self-dispersibility in water or an aqueous solvent, which could not be conventionally achieved, and a cosmetic preparation containing the hydrophilic inorganic powder are provided by combining a hydrophilic surfactant and lipophilic surfactant. There is provided the hydrophilic inorganic powder comprising an inorganic powder as a base material; a hydrophobic-coat that covers the surface of the inorganic powder; and a hydrophilic-coat that covers the hydrophobic-coat, wherein ingredients of the hydrophilic-coat comprises both a hydrophilic surfactant and a lipophilic surfactant, and each of the hydrophilic surfactant and the lipophilic surfactant has a branched alkyl moiety in their molecules, wherein the hydrophilic inorganic powder has self-dispersibility in water or an aqueous solvent.

The present invention relates to a core-shell network structure formed using a biocompatible biopolymer and to a composition comprising same. Said structure can be used as an alternative to synthetic chemical materials, such as polyethylene glycol (PEG), to effectively disperse an insoluble effective substance within a composition, thus addressing safety issues, and formulations can be preserved stably for a long time through said network structure. Furthermore, said structure and the composition comprising same may provide useful benefits for the skin in terms of skin barrier enhancement, skin moisturization, skin regeneration, or the like.

Ultraviolet radiation sun protective compositions are reported which feature micronized metal oxide inorganic particles selected from zinc oxide, titanium dioxide and mixtures thereof, the inorganic particles being coated with an adduct of a hydroxy cinnamate and a silanol, amounts of the adduct to the inorganic particles being in a relative weight ratio of 1:200 to 1:4.

Skin tightening compositions for application to the skin for providing an instantaneous and dramatic improvement to the appearance of skin. The skin tightening compositions typically include an aqueous phase comprising about 5 to about 40 wt. % of water, one or more water dispersible pigments; and an oil phase comprising at least 5 wt. % of one or more hydrophobic film forming polymers, from about 1 to about 40 wt. % of one or more thickening agents, from about 30 to about 85 wt. % of one or more volatile hydrocarbon oils.

The present invention provides compositions with increased color shade stability comprising organic pigments and rutile TiO.sub.2. The combination of specific ingredients disclosed herein prevents the color migration often associated with organic pigments including azo based dyes and lakes.

Provided is a core-shell structure that can achieve both improvement in transdermal absorption of an active ingredient and reduction in skin irritation at a high level. A core-shell structure 10 includes: a core portion 11 containing an active ingredient, the core portion being solid; and a shell portion 12 containing both a first surfactant having a melting point of less than 35° C. and a second surfactant having a melting point of 35° C. or more, the first surfactant and the second surfactant each having an HLB value of 4 to 14, the first surfactant and the second surfactant each containing at least one selected from the group consisting of sorbitan fatty acid esters, glycerin fatty acid esters, propylene glycol fatty acid esters, and fatty acid alkanolamides.

Ultraviolet radiation sun protective compositions are reported which feature micronized metal oxide inorganic particles selected from zinc oxide, titanium oxide and mixtures thereof, the inorganic particles being coated with poly[C.sub.8-C.sub.20 hydroxycarboxylic acid], the coated particles measured at a 10% loading in dodecane and 1 minute elapsed time having a Zeta Potential ranging from 2 to 10 mv, amounts of the poly[C.sub.8-C.sub.20 hydroxycarboxylic acid] to the inorganic particles being in a relative weight ratio of 1:100 to 1:10.

The embodiments relate to cosmetic powder materials and compositions containing them that provide a high coverage to the skin and high near infrared/nitrated (NIR/IR) reflectance. The compositions include optionally surface treated titanate crystals used as cosmetic powders, and a cosmetically acceptable carrier. The compositions may be useful as a foundation and/or as a composition to correct skin discoloration, and may be used protect the skin from sun exposure.

An unground N.sup.ε-long chain acyl lysine crystal production method that includes: preparing a solution having at least one type of N.sup.ε-long chain acyl lysine dissolved in an acidic or basic solvent including water and/or one type selected from water-soluble organic solvents; dipping the solution into an acidic solution having a pH of at least 0.2 and less than 2.0, at a temperature of no more than 20° C.; and crystallizing N.sup.ε-long chain acyl lysine crystals.