L'oreal

Karl Boutelet

Didier Candau

Raluca Lorant

Laure Fageon

Carole Guiramand

Nathalie Seyler

Vincent Grandjon

Marie-Lise Chiron

Sandrine Therouin-Koely

Cosmetic emulsion containing a gemini surfactant and a lipophilic polymer The invention relates to a composition in the form of an emulsion, in particular in the form of an oil-in-water emulsion, comprising a gemini surfactant having a specific chemical structure with at least two fatty amide groups and at least one lipophilic polymer comprising at least hydroxyethyl acrylate units and acrylate units bearing a lipophilic group, wherein the weight ratio of the sum of all the hydroxyethyl acrylate units to the sum of all the acrylate units bearing a lipophilic group ranges from 1:30 to 1:1 and wherein the lipophilic polymer has a number-average molecular weight Mn ranging from 2000 to 9000 g/mol. The composition in accordance with the invention makes it possible to obtain a cosmetic emulsion having an increased sun protection factor, while at the same time having good cosmetic properties, such as a non-greasy and non-tacky feel, while at the same time being stable, in particular from the physicochemical viewpoint.

Cosmetic emulsion containing a gemini surfactant and a lipophilic polymer

Emulsion comprising an anionic acrylic copolymer and a lipophilic polymer A subject of the present invention is a composition in the form of an emulsion, preferably in the form of an oil-in-water emulsion, comprising at least one hydrophilic gelling polymer chosen from anionic acrylic copolymers and at least one lipophilic polymer comprising at least hydroxyethyl acrylate units and acrylate units bearing a lipophilic group, wherein the weight ratio of the sum of all the hydroxyethyl acrylate units to the sum of all the acrylate units bearing a lipophilic group ranges from 1:30 to 1:1 and wherein the lipophilic polymer has a number-average molecular weight Mn ranging from 2000 to 9000 g/mol. The composition in accordance with the invention makes it possible to obtain emulsions which are homogeneous (the emulsion is macroscopically smooth and has no grains, after storage in a pot for 24 hours at ambient temperature (25&#xb0; C.)), which have a variable viscosity (very fluid to very thick), which are stable over time, and which have good sensory properties, in particular which are non-tacky, non-shiny and non-greasy on the skin.

Emulsion comprising an anionic acrylic copolymer and a lipophilic polymer

The present invention relates to a composition for topical application comprising at least one fatty phase; at least one volatile hydrocarbon-based oil; and at least one lipophilic polymer comprising at least hydroxyethyl acrylate units and acrylate units bearing a lipophilic group, the weight ratio of the sum of all the hydroxyethyl acrylate units to the sum of all the acrylate units bearing a lipophilic group ranging from 1:30 to 1:1 and the lipophilic polymer having a number-average molecular weight Mn ranging from 2000 to 9000 g/mol. The composition in accordance with the invention has improved sensory properties, allowing faster and more complete absorption into the skin. In particular, the composition in accordance with the invention leaves a non-greasy and non-tacky feel on the skin, during and after application, even in the presence of solid fatty substances such as waxes.

Composition comprising a fatty phase, a lipophilic polymer and a volatile hydrocarbon-based oil

A cosmetic composition in the form of an emulsion comprising at least one aqueous phase and at least one fatty phase, at least one superabsorbent polymer and at least one surfactant of formula (I): Wherein: Rand Rdenote, independently of each other, an alkyl radical containing from 1 to 25 carbon atoms; Rdenotes a spacer formed from a linear or branched alkylene chain containing from 1 to 12 carbon atoms; X and Y denote, independently of each other, a group &#x2014;(CHO)&#x2014;(CHO)Z, in which Z denotes a hydrogen atom or a radical &#x2014;CH&#x2014;COOM, &#x2014;SOM, &#x2014;P(O)(OM), &#x2014;CH&#x2014;SOM, &#x2014;CH&#x2014;SOM or &#x2014;CH(CHOH)CHOH, in which M, M' represent H or an alkali metal, alkaline-earth metal, ammonium or alkanolammonium ion, a ranges from 0 to 15, b ranges from 0 to 10, and the sum of a+b ranges from 1 to 25; and n ranges from 1 to 10 is provided.

Composition comprising a superabsorbent polymer and a gemini surfactant

Topically applicable cosmetic/dermatological UV protection compositions having enhanced SPF contain at least one organic UV screening agent and/or at least one inorganic screening agent, such compositions also containing at least the following constituents (A) and (B):

Sun protection compositions comprising semi-crystalline polymers and hollow latex particles

Photoprotective cosmetic/dermatological compositions well suited for the UV-photoprotection of human skin and/or hair, comprise (a) particulates of at least one insoluble mineral and/or organic UV-screening agent having a particle size ranging from 5 nm to 5 &#x3bc;m and (b) a stabilizing amount of at least one amphiphilic polymerizate of at least one ethylenically unsaturated monomer which comprises a sulfonic group, whether in the free acid or in partially or totally neutralized state, and which amphiphilic polymerizate also comprises at least one hydrophobic moiety.

Photoprotective/cosmetic compositions comprising sulfonic/hydrophobic amphiphilic polymers

Photoprotective cosmetic/dermatological compositions well suited for the UV-photoprotection of human skin and/or hair, comprise (a) at least one organic UV-screening agent and (b) an SPF-improving amount of at least one amphiphilic polymerizate of at least one ethylenically unsaturated monomer which comprises a sulfonic group, whether in the free acid or in partially or totally neutralized state, and which amphiphilic polymerizate also comprises at least one hydrophobic moiety.

Photoprotective compositions comprising sulfonic/hydrophobic amphiphilic polymers

Photoprotective compositions well suited for the photoprotection of the skin, lips and/or hair against the damaging effect of UV-radiation comprise at least one aqueous phase and at least one system for screening out UV-radiation, and which also contain:

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Paris, France

Karl Boutelet