The present invention relates to self-assembly type Janus microparticles and a preparation method therefor. The present invention can be used for preparing Janus microparticles in which a degree of phase separation is precisely controlled, for realizing stable interfacial orientation by selectively coating only one side of particles with a metal oxide, and for mass-producing Janus microparticles which have a degree of phase separation precisely controlled and exhibit extreme amphiphilicity in an anisotropic structure. Therefore, the Janus microparticles and the preparation method therefor according to the present invention can be widely used in various fields, thus contributing to industrial development.

A multistage colored polymer particle is provided, having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer; an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer; a monoethylenically unsaturated carboxylic acid inner shell monomer; optionally, an aliphatic inner shell monomer; and, optionally, a first polymerizable dye monomer; an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer; a monoethylenically unsaturated non-carboxylic acid outer shell monomer; optionally, a second polymerizable dye monomer; and, optionally, an aliphatic outer shell monomer; wherein the core, when dry, contains at least one void; and wherein the multistage colored polymer particle comprises polymerized units of polymerizable dye monomer. Skin care formulations comprising multistage colored polymer particles and methods of using same are also provided.

The present invention relates to a method for preparing multilayer spherical particles and, more specifically, to a method for preparing multilayer spherical particles comprising the steps of: (i) preparing a core component comprising an active ingredient and a shell solution comprising a first polymer component; (ii) forming the core component and shell solution of step (i) into core-shell particles by electro-coextrusion; (iii) drying the core-shell particles obtained from step (ii); and (iv) capsulizing the dried core-shell particles of step (iii) by means of a second polymer. Further, the present invention relates to a cosmetic composition comprising multilayer spherical particles prepared by the method.

Disclosed are multi-staged acrylic emulsion polymers and their use as rheology modifiers in the formulation of liquid personal care cleansers for the skin and hair. More particularly, the present technology relates to liquid cleansing compositions that possess the necessary rheology properties to stably suspend particles and insoluble materials within the cleanser but may also be used with pump dispensers to generate and dispense a creamy foam without fouling the pump mechanism.

A suncare formulation comprising: a dermatologically acceptable organic carrier; a UV radiation absorbing agent; and an SPF booster; wherein the SPF booster comprises a multistage polymeric particle having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer; an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer; a monoethylenically unsaturated carboxylic acid inner shell monomer and an aliphatic inner shell monomer; an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer; an aliphatic outer shell monomer; a monoethylenically unsaturated non-carboxylic acid outer shell monomer and an ethylenically unsaturated surfactant outer shell monomer; wherein the core, when dry, contains a void; wherein the multistage polymeric particle has an average particle size, when dry, of 50 to 1,000 nm.

The present invention relates to a process for the elongation and/or densification of fibers, on a keratin material, characterized in that it employs a composition, especially a cosmetic composition, in particular a makeup composition, comprising at least: one volatile hydrocarbon-based oil, particles of at least one polymer surface-stabilized with a stabilizer, and a hydrophobic film-forming polymer, chosen from hydrocarbon-based block copolymers, hydrocarbon-based resins, and mixtures thereof.

Cured silicone particles are disclosed. The cured silicone particles are obtained by curing a curable silicone composition comprising at least components (A) through (C), wherein components (A) and (B) are polyorganosiloxanes having certain average formulas, and component (C) is a catalyst. The average particle size of the cured silicone particles is from 0.1 to 500 m. Related methods and a cosmetic material comprising the cured silicone particles are also disclosed.

Methods of making personal care compositions including microcapsules and methods of enhancing the efficacy of the microcapsules in said personal care compositions.

A composition, especially a cosmetic composition, in particular for making up and/or caring for keratin materials, including at least one aqueous phase gelled with at least one hydrophilic gelling agent; and at least one oily phase gelled with at least one lipophilic gelling agent chosen from organopolysiloxane elastomers; said phases forming therein a macroscopically homogeneous mixture. The composition also includes a dispersion of solid aggregates, said aggregates being formed from 10% to 80% by weight of wax(es), relative to their total weight. Also disclosed is a process for preparing such a composition.

The present invention relates to a cosmetic method for improving the surface appearance of skin having relief, skin having spots or aging related irregularities, comprising applying to human skin in need thereof a composition comprising particles of three-dimensional ordered porous structure comprising spheroidal pores, said pores having an average pore diameter ranging from 50 nm to 500 nm, the pore diameter varying by no greater than 15%, said particles having an average largest dimension ranging from 1 to 50 m, and wherein said inorganic material comprising a continuous phase being obtained from (a) at least a metal oxide of metal having a valency between 1 and 6, (b) at least SiO.sub.2 or Si.sub.xO.sub.y with x and y comprised independently from another between 0.1 and 2 or (c) a network of covalently bonded metal oxide and metalloid, the metal oxide and the metalloid being of (a) and (b). It furthers relates to a particular organic material and a process of manufacturing the same.