An object of the present invention is to provide an aqueous dispersion for use in a cosmetic, which has both the flexibility and hair styling properties (hair set retention properties), and which allows for easily re-styling hair when the hair style once set has been disturbed; and a cosmetic including the same. In the above mentioned aqueous dispersion and the cosmetic, a polyurethane is used, which is obtainable from a polyol component including at least one type of a polyether polyol and a polyester polyol, and a polyvalent isocyanate component, wherein the polyol component includes: a polyether polyol containing as a major component a structural unit derived from a polyalkylene glycol having from 2 to 4 carbon atoms, and having a number average molecular weight of 400 or more and 4,000 or less; or a polyester polyol containing a structural unit derived from at least one type of dicarboxylic acid selected from the group consisting of phthalic acid, isophthalic acid and terephthalic acid.

Silica-including microcapsule resin particles including an outer shell constituted of a crosslinked polymer and a cavity partitioned with the outer shell, in which the silica-including microcapsule resin particles contain inside the cavity a porous structure in which silica particles are mutually connected, and have a volume average particle diameter of 0.5 to 100 m.

A dispersible powder includes a powder treated with a surface treatment agent, and the surface treatment agent contains a (meth)acrylic polymer having a repeating unit with a phosphorylcholine group. Thus, provided are: a dispersible powder having excellent dispersibility in an aqueous medium and high dispersion stability; and a cosmetic blended with this powder, the cosmetic being capable of forming a uniform cosmetic film and having favorable spreadability upon application, stretchability, adhesiveness, and feeling on use as well as high stability.

A treatment agent for a cosmetic powder is provided. The treatment agent contains a reactive organosiloxane represented by the following general formula (1) as a main ingredient: ##STR00001##
In general formula (1): each R.sup.1 is independently an alkyl group having 1 to 30 carbon atoms; each R.sup.2 is independently an alkyl group having 1 to 20 carbon atoms; R.sup.3 is a divalent alkylene group; n is an integer of 1 to 200; and p is an integer of 1 to 3. The treatment agent for a cosmetic powder of this disclosure is capable of imparting excellent lipophilicity. A cosmetic raw material having cosmetic effect and giving an excellent feeling of use, and a cosmetic are also provided.

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.

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.

The present invention relates to a mousse composition including water, at least one C2-C5 alcohol, at least one salt, at least one amphiphilic polymer, and at least one hydrophobic surface-treated pigment, as well as to methods for making-up and enhancing the appearance of keratinous materials using the mousse composition.

A microcapsule suspension for treating a protein-containing surface includes droplets of a dispersed water-immiscible core phase, an aqueous continuous phase, and a wall surrounding each core phase droplet. The wall includes the salt formed from at least one Lewis base reactant and at least one Lewis acid reactant, wherein at least one Lewis base reactant or Lewis acid reactant is amphiphilic and wherein at least one Lewis acid reactant is selected from the group consisting of proteins, protein hydrolysates, charged amino acids, and water-soluble salts of any of these.

The present invention relates to a composition comprising particles of at least one polymer that is surface-stabilized with a stabilizer, the polymer of the particles being a C.sub.1-C.sub.4 alkyl (meth)acrylate polymer; the stabilizer being an isobornyl (meth)acrylate polymer chosen from isobornyl (meth)acrylate homopolymer and statistical copolymers of isobornyl (meth)acrylate and of C.sub.1-C.sub.4 alkyl (meth)acrylate present in an isobornyl (meth)acrylate/C.sub.1-C.sub.4 alkyl (meth)acrylate weight ratio of greater than 4, at least one hydrocarbon-based oil and at least one amorphous hydrocarbon-based block copolymer obtained by polymerization of at least one monomer of unsaturated hydrocarbon type comprising 2 to 5 carbon atoms and containing one or two ethylenic unsaturations. The invention also relates to a process for making up and/or caring for keratin materials, in which said composition is applied.

The present invention relates to a particularly effective protective coating for metallic objects, the coating method, and the special applications thereof. The particularly high protective effect is achieved by the adaptation of the inorganic fraction and the organic polymer fraction of the coating to the specific surface of the object. Further adjustments of the coating can be used for further optimization, for example of the protection properties or other product properties.