Disclosed herein are core-shell particles and process for preparing the same. The core-shell particles include a functional core, a multilayer or porous shell surrounding the functional core and polymeric tails extending from the shell. The functional core includes an antimicrobial agent or an antitumor agent. Also disclosed herein are pharmaceutical or health care compositions containing the core-shell particles.

A composition comprising a pigment particle that is coated with a cationic material and isopropyl titanium tri-isostearate. The pigment particle can be included in a cleansing composition for deposition on a surface, such as skin.

The present invention relates to a method of producing a composite powder. A porous powder is physically covered by collagen and chitosan sequentially, thereby forming the composite powder. The composite powder has good dispersity, an ability of moisture retention and a low greasiness while being added in an oil-in-water emulsion base or a hydrogel base to form a cosmetic composition.

A biodegradable resin particle, includes: a base particle containing a biodegradable resin; a first layer on a surface of the base particle, the first layer containing at least one cationic resin of a polyalkyleneimine, a polyallylamine and a polyvinylamine; and a second layer on the first layer, the second layer containing an anionic or nonionic hydrophobic compound.

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.

Multi-coated nanoparticles including multiple coating layers of chitosan and polyglutamic acid, composition for skin care including the same, and method of manufacturing the same are provided. The nanoparticles have a liposome core layer and coating layers. The core layer includes a bioactive particle and a core hydrogel. Not only is it easy to mass-produce, but also has the effect of steadily releasing bioactive particles for a long period of time due to its high sealing rate and high stability.

A population of capsules, the capsules can include a core including a benefit agent and a shell surrounding the core, wherein the shell can include a first shell component.

This invention relates to a cosmetic composition comprising, in a physiologically acceptable medium, at least one microcapsule comprising at least: —a core, —a first laminated coating surrounding said core comprising at least 45% by weight of the total weight, of a microcapsule of multilayer interference particles comprising at least one iron oxide, and —a second laminated coating surrounding said first coating, comprising between 10 and 40% by weight of titanium dioxide relative to the total weight of a microcapsule, said multilayer interference particles being released from said microcapsule(s) only when said composition is applied on a keratin material such as keratin fibers or the skin.

A method of forming microcapsules having improved physical properties and release control as well as the microcapsules formed by the process wherein the capsule wall is formed by the concurrent polymerization of monomers, oligomer and/or prepolymers on the inside of the capsule wall and different monomers, oligomers and/or prepolymers on the exterior of the capsule wall as it forms.

Zinc oxide particles are prepared as a dry powder through a vapor phase formed by a plasma process, or by introducing defects into stoichiometric zinc oxide particles in a liquid carrier through mechanical stress. The zinc oxide has an O:Zn ratio of at least 0.99, an average particle size of 10 to 300 nm, and a sufficient concentration of oxygen vacancies and zinc vacancies to give a dispersion of the particles in C12-C15 alkyl benzoate an orange to tan color corresponding to a ΔE value of at least 15 in a Dispersion Color Test. The particles contain no aggregates and have no detectable particles 500 nm or larger, on a number-weighted basis