Cosmetic and dermatological compositions, including color changing compositions, are provided which typically include a plurality of synthetic particles having a size in the micrometer or nanometer range. Each synthetic particle typically includes one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and a stabilizing material which has a refractive index larger than 1.45; the aggregates having a size larger than about 100 nm and the composition being biodegradable and biocompatible.

Disclosed is a non-spherical microcapsule comprising a core comprising a benefit agent, and a shell comprising nanoparticles having a diameter of 10 to 300 nm and polyurea.

Hornificated microfibri Mated cellulose (MFC) particles are provided, which are useful as an abrasive material in personal care products. Personal care products comprising such particles are also provided.

The present invention provides a gel for injection containing controlled degradation polyester microspheres. The gel for injection consists of crosslinked sodium hyaluronate gel, non-crosslinked sodium hyaluronate gel, polyester microspheres wrapped with hard fat and a balanced salt solution. The polyester microspheres are separated from water by means of wrapping and hydrophobic effect of the hard fat, and accordingly the present invention solve the problem that polyester materials are prone to degradation in gel. In the meantime, the hard fat has the characteristic of low melting point (melting point being 33° C.-39° C.), after the product is injected into human body, the hard fat is molten and separated under the action of human body temperature, and the wrapped polyester microspheres are released so that the microspheres can be degraded in the human body to achieve controlled degradation.

Semisolid oral dispersions for improving the health and/or appearance of the oral cavity. The semisolid oral dispersions include hydrophilic active agent particles in hydrophobic phase. The hydrophilic active agent particles can include bleaching agents, antimicrobial agents, anticalculus agents, and/or combinations thereof. The hydrophilic active agent particle can have a solubility in water of at least about 20 parts, by weight of the particles, in about 100 parts, by weight, of water. The hydrophobic phase can be semisolid petrolatum.

Disclosed is the preparation of injectable collagen suspensions, to the method for preparing the suspensions, and to the uses thereof, particularly for forming dense collagen matrices.

Disclosed is a modified biopolymer having the formula A-XY wherein: (a) A is a starting material selected from the group consisting of a polysaccharide, a protein and a cellulose; (b) X is a first moiety bearing a functionality co-reactive with A; (c) Y is a second moiety covalently bound to X, capable of undergoing free radical polymerization and bearing at least two ethylenically unsaturated functional groups; (d) the starting material A and the first moiety X are linked covalently through linkages selected from the group consisting of an ester, an amide, a urethane, a urea, a sulfonate ester, a phosphate ester and an ether; and (e) a degree of substitution of the starting material A with the first moiety X is less than 0.5 but more than 0.1. Compositions including the modified biopolymer and methods for making them are also disclosed.

Cosmetic and dermatological compositions, including color changing compositions, are provided which typically include a plurality of synthetic particles having a size in the micrometer or nanometer range. Each synthetic particle typically includes one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and a stabilizing material which has a refractive index larger than 1.45; the aggregates having a size larger than about 100 nm and the composition being biodegradable and biocompatible.

The present invention relates to an emulsion not containing any emulsifying surfactant, in particular to an oil-in-water emulsion not containing any emulsifying surfactant, characterized in that it comprises, especially in a physiologically acceptable medium, at least composite particles comprising a core comprising at least organic or inorganic particles A; said core being covered at the surface, continuously or discontinuously, with an envelope comprising at least organic or inorganic particles B; said particles A and B having different polarities.

The present disclosure relates to a biodegradable polymer dispersion containing a lactic acid-based polymer, a lactic acid-based polymer and polyethylene glycol-containing block copolymer (PEG-PLA), and a hyaluronic acid mixture, wherein the biodegradable polymer dispersion has excellent physiological activity by itself, has excellent dispersion stability of the lactic acid-based polymer, and is capable of effectively supporting active ingredients. In addition, the present disclosure relates to a composition containing the biodegradable polymer dispersion and a skin improvement system.