Disclosed herein are oil-in-water dispersions and sunscreen compositions that contain them, which exhibit high in vivo sun protection factor (SPF) efficiency due to the ability of the dispersions to both absorb and scatter ultraviolet (UV) light. These high efficiency sunscreen compositions include discrete oil particles that are enclosed within a solid coating and dispersed in an aqueous phase, wherein each oil particle contains an organic ultraviolet A (UVA) and/or an organic ultraviolet B (UVB) absorbing compound, and optionally a photostabilizer.

Disclosed are pigment powders containing only coated BiOCl flakes, which flakes area) BiOCl flakes having a coating containing yellow iron oxide Fe.sub.2O.sub.3*xH.sub.2O, optionally a colorant, optionally an adjuvant, and optionally SiO.sub.2, b) BiOCl flakes having a coating containing SiO.sub.2, optionally a colorant, and optionally an adjuvant, c) BiOCl flakes having a coating containing a colorant, SiO.sub.2, optionally yellow iron oxide Fe.sub.2O.sub.3*xH.sub.2O, and optionally an adjuvant, or d) BiOCl flakes having a coating containing Fe.sub.3O.sub.4 and optionally SiO.sub.2, to a process for the preparation of the pigment powders, and to the use thereof especially in cosmetic formulations.

The present invention relates to a cosmetic composition comprising: a) at least one UV filter; b) at least one composite particle in spherical form, having a mean size of between 0.1 and 30 m comprising at least one particulate UV-screening agent and a core constituted of at least one inorganic material and/or of at least one organic material; c) at least one anti-oxidation active ingredient chosen from I) a compound according to formula (I) wherein each X independently represents OPO.sub.3Y, wherein Y is selected from hydrogen, Li, Na and K; II) a dimer peptide according to formula (II); III) a tocopherol or its derivatives; and IV) a mixture thereof. ##STR00001##

The present invention relates to a cosmetic composition comprising a physiologically acceptable medium, in the form of an oil-in-water emulsion, containing at least one associative polyurethane complying with formula (I) and pigment and/or nacre particles coated with at least one lipophilic compound, the average size of said particles being greater than 100 nm.

There currently exists no needle capable of delivering pharmaceutical or cosmetic ingredient(s) into deep layers of integumental tissue (e.g. skin, scales, bark), nor any needle device designed to facilitate the precise administration of a desired dose, and to limit inflammation, pain, and other side effects associated with the needle(s). The present invention relates to an integumental dissolving needlewhich houses micronized cosmetic/pharmaceutical ingredient(s), encapsulated by a coating agent absorbed into the integumentarranged on the surface or surfaces of a poultice. Needle thickness and length may be varied according to the biological species of interest. In addition, dosage(s) is/are printed on each section of the device to make explicit how many milligrams of the ingredient are present per unit area; these sections may be separated from one another along groove(s) or other markers on the device. The present invention is a needle device consisting of the above components.

A coated powder comprises (a) particles, and (b) a coating on the surface of the particles including (1) silica moieties, (2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and (3) poly(dialkyl)siloxane moieties. The amount by weight in SiO.sub.2 equivalents of the organo oxysilane moieties and the silica moieties is at least 0.0625% of the total coated powder weight per m.sup.2/g of the specific surface area of the particle to be coated.

A coated powder comprises (a) particles, and (b) a coating, on the surface of the particles. The surface coating comprises (1) optionally silica moieties, (2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and (3) optionally organo-substituted polysiloxane moieties. The organo oxysilane moieties each have the formula R.sub.nSiO.sub.4-n, with n=1, 2 or 3, and each R group is independently selected from the group consisting of alkyl, alkenyl, alkynyl, esters, amides, and at least one aromatic moiety having an absorption band maximum in the region of 280 nm to 780 nm.

The present invention relates to a composition for coating keratin materials, more particularly for making up and/or caring for keratin materials, containing: at least one aqueous phase gelled with at least one hydrophilic gelling agent selected from synthetic polymeric gelling agents, mixed silicates, fumed silicas, and mixtures thereof; and at least one oily phase gelled with at least one lipophilic gelling agent; said phases forming therein a macroscopically homogeneous mixture and said composition also comprising: at least one hydrophobic-coated pigment; and at least one liquid fatty acid of formula (1) below:

##STR00001##

in which R is chosen from:
a) a saturated, branched C.sub.14-C.sub.22, preferably C.sub.18, alkyl group, or
b) an alkyl group comprising at least one linear or branched C.sub.14-C.sub.22, preferably C.sub.18, double bond; and/or at least one glycol compound of formula (2) below:

CH.sub.3[CH.sub.2CH.sub.2].sub.m[COO].sub.nCH.sub.2CH(OH)CH.sub.2OH (2)

in which: m is between 2 and 4 n is equal to 0 or 1; said gelled oily phase comprising at least one polar oil when the composition comprises at least one glycol compound of formula (2); said gelled aqueous phase comprising at least one synthetic polymeric gelling agent and said gelled oily phase comprising at least one polar oil when the composition comprises at least one glycol compound of formula (2).

A method of preparing hydrophobic porous silica includes adding an alcohol to a solvent in which a porous silica particle including a hydrophilic group is dispersed and stirring the same to form a mixture, drying the mixture including the porous silica particle in a vacuum, and condensation reacting the hydrophilic group of the porous silica particle with the alcohol on the surface of the porous silica particle to modify the surface of the porous silica particle to be hydrophobic.

Treatment of skin tissue with photoactive materials and light, such as nanoparticles and formulations which are useful for cosmetic, diagnostic and therapeutic applications to mammals such as humans. In particular, embodiments of thermal treatment of the skin surface with metal nanoparticles in surfactant containing solutions are disclosed.