Emulsion polymer particles comprising from 25 to 45 wt % polymerized residues of at least one C.sub.3-C.sub.6 carboxylic acid monomer and from 0.1 to 2 wt % polymerized residues of at least one crosslinker, wherein the particles have a Tg which occurs over a range of at least 60° C.

The present invention relates to a lipolysis composition comprising a biocompatible polymer that is surface-modified by an adipocyte-targeting or cell-penetrating peptide; and surface-modified gas-generating nanoparticles that contain fine-grained calcium carbonate crystals enclosed in the biocompatible polymer.

Hydrogel particles are provided that include a crosslinked polymer and a drug conjugated to the crosslinked polymer. The hydrogel particles may include a pH sensitive moiety and a redox sensitive moiety. The hydrogel particles also may be dispersed in a host hydrogel. Kits and methods of drug delivery and treatment also are provided.

Disclosed are compositions for treating and conditioning keratinous substrates, comprising a silane compound; hydrophobic silica aerogel particles; a first organic acid; a cationic surfactant chosen from fatty dialkylamines; a second organic acid; a fatty alcohol; water; and optionally, a silicone compound other than the silane compound. Also disclosed are methods for treating and conditioning keratinous substrates using the composition.

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.

This disclosure relates generally to a sunscreen composition containing visibly transparent biocompatible ultraviolet blocking polymer nanoparticles. The sunscreen composition comprising polydimethylsiloxane (PDMS) nanoparticles, at least one flavoring agent, at least one coloring agent, at least one stabilizer, and at least one preservative, in a defined form, wherein size of the PDMS nanoparticles ranging from 200 to 1200 nm. The size of the PDMS nanoparticles ranging from 200 to 500 nm for air medium and from 800 to 1200 nm for water medium. The PDMS nanoparticles comprise a PDMS polymer having terminal functional group selected from alkyl, alkoxy, vinyl, hydroxyl, or a combination thereof. The sunscreen composition is available in the defined form selected from a group consisting of a skin cream, a skin lotion, a powder, a gel, and a sprayable liquid.

In a cosmetic composition according to the present invention, a coating membrane with a multilayer lamella structure is formed on the outside of ceramide particles by using phytosphingosine, and therefore, the cosmetic composition is stably present without ceramide precipitation even in formulations with low viscosity as well as high viscosity although the particles contain a high content of ceramide, and a cosmetic composition showing an excellent skin barrier recovery effect can be provided.

A redispersible three-layer cosmetic comprising an aqueous phase, an oil phase a polysaccharide gel particles having a mean particle size of 0.1 to 1000 μm.

The present invention relates to inorganic powder coated with biocompatible polymer and a cosmetic composition comprising same. More particularly, the present invention relates to an organic/inorganic composite powder in which the rough surface of the inorganic powder is treated with biocompatible polymer, thereby improving dispersibility and feeling of use and to a cosmetic composition comprising said composite powder so as to achieve improved feeling of use and tight adhesion when applied to the skin.

The invention provides a particle having an uneven structure on a surface thereof, and containing cellulose or a cellulose derivative and a clay mineral as main components, and a method for producing the same. Such a particle is soft and excellent in light scattering properties, and in particular, is excellent in a defocusing effect when it is formulated in cosmetics such as foundations, so that it is useful as cosmetics.