The present invention provides: a microemulsion having emulsified particles of a small particle diameter, having a narrow particle diameter distribution, having improved uniformity in particle diameter, and having excellent stability; a composition for preparing such a microemulsion; methods for producing the microemulsion and the composition; and an object using the microemulsion. A microemulsion is prepared with use of a composition that contains: a surfactant component which contains at least one selected from polysorbate 80 and a polyoxyethylene castor oil; an oil; and a poorly water-soluble functional component in a predetermined proportion.

The invention relates to transparent, stable, film-forming oil-in-water microemulsions, and the use of the microemulsions in leave-on products or wash-off products of hair care application. The microemulsions contain an aminoalkyl-functional organopolysiloxane, a silicone resin, optionally a low viscosity oil, and a surfactant composition, are storage stable, and form coherent crosslinked films upon drying.

The invention relates to a composition in the form of a nanoemulsion or microemulsion, comprising: —a first fatty acid ester of polyglycerol which is chosen from a fatty acid ester of polyglycerol formed from at least one acid comprising an alkyl or alkenyl chain containing from 12 to 20 carbon atoms and from 3 to 6 glycerol units; —a second fatty acid ester of (poly)glycerol (c) which is chosen from a fatty acid ester of (poly)glycerol formed from at least one acid comprising an alkyl or alkenyl chain containing from 6 to 18 carbon atoms and from 1 to 3 glycerol units; —at least one organopolysiloxane elastomer; —at least two acrylic acid-based polymers that are different from one another; —at least one amphiphilic polymer comprising at least one 2-acrylamidomethylpropanesulfonic acid (AMPS) unit; —at least one oil; —water. The invention also relates to a cosmetic treatment process for keratin materials such as the skin, by application of such a composition.

A composition intended for the remodelling treatment of a scar, by means of topical application, in particular, as a massage adjuvant. The composition takes the form of a microemulsion, preferably with a gel texture, containing a lipophilic compound, a wound healing agent, a humectant and an emulsifying agent, as well as a small amount of water.

Provided herein are magnetically-responsive, photosensitizer based antimicrobial microemulsions and photodynamic nanoplatforms in which a photosensitizer functionally associated with a plurality of superparamagnetic iron oxide nanoparticles are encapsulated. Also provided are methods and processes utilizing the antimicrobial microemulsions and photodynamic nanoplatforms to treat an oral disease, to reduce a microbial population in a pathogenic oral biofilm and to improve the efficacy of a photosensitizer during an antimicrobial photodynamic therapy treatment of an oral disease.

Disclosed are stable, non-irritating, skin treatment active agents containing formulations and delivery systems for topical application to the skin. The disclosed topical formulations and delivery systems provide controlled, gentle release of the active agents into the skin for the treatment of amenable skin conditions as well as for improvement of aesthetic skin properties. Also provided are methods for the formulation, manufacture and use of the disclosed formulations and delivery systems.

The application relates to an emulsifying composition, in particular for cosmetic use, allowing an oil-in-water emulsion (O/W) to be obtained, the emulsion comprising at least one cyclodextrin and at least one O/W emulsifier of natural origin with a hydrophilic-lipophilic balance value (HLB) of more than 8. The O/W emulsifier of natural origin can be selected from alkyl polyglucosides, mixtures of at least one alkyl polyglucoside and at least one fatty alcohol, and non-ethoxylated polyol fatty esters. The application also relates to a composition of the Pickering emulsion type, in particular for cosmetic use, containing the emulsifying composition according to the invention, and to the process for preparing such a composition of the O/W Pickering emulsion type, in particular at low temperatures.

A microemulsion composition containing: (A) a polyether-modified organopolysiloxane shown in the following general formula (1) having an HLB of 8.0 or more calculated by Griffin's method; (B) a polyether-modified organopolysiloxane shown in the following general formula (7) having an HLB of 5.0 or less calculated by Griffin's method; (C) a glycerol derivative shown in the following general formula (8); (D) a polyhydric alcohol other than the (C); (E) a silicone oil having a kinematic viscosity of 20 mm.sup.2/s or less at 25° C.; and (F) water, where a ratio (A)/(B) of a mass of the (A) to a mass of the (B) satisfies 1.0 to 15.0 and the microemulsion composition has a transparent to translucent appearance at 25° C. This provides a microemulsion composition having a transparent to translucent appearance.

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One object is to provide a cosmetic composition having high transparency, high stability, good feeling of use and high cleansing power. There is provided a cosmetic composition in a form of an oil-in-water type microemulsion, comprising: (a) at least one type of an oil; (b) a polyglycerol fatty acid monoester having an HLB value of 11 to 18; (c) a polyglycerol fatty acid diester or a polyglycerol fatty acid triester having an HLB value of 10 to 13 and having an alkyl chain or an alkenyl chain of ten to fourteen carbon atoms; (d) an anionic surfactant; and (e) water, wherein a mass ratio of the (c) polyglycerol fatty acid diester or polyglycerol fatty acid triester to the (b) polyglycerol fatty acid monoester is 0.01 to 1.65, and a ratio of a total mass of the (b) the polyglycerol fatty acid monoester and the (c) polyglycerol fatty acid diester or polyglycerol fatty acid triester to a mass of the (a) oil is 1 to 550.

Disclosed are compositions for treating and conditioning keratinous substrates, comprising a cationic agent comprising quaternary ammonium compounds; a modified starch; silane compounds, a cationic vinylpyrrolidone polymer and water. Also disclosed are methods treating and conditioning keratinous substrates using the composition.