Abstract: The invention relates to a photoprotective composition containing as liquid phase, an oil-in-water emulsion, emulsified with at least one dimeric surfactant comprising two surfactant units, which may be identical or different, each consisting of a hydrophilic head and a hydrophobic tail and connected to each other, via the hydrophilic heads, by means of a spacer group, at least one photoprotective system capable of screening out UV rays, containing at least one mineral nanopigment based on metal oxide, and optionally at least one organic, preferably hydrosoluble or liposoluble UV-A and/or UV-B screening agent, and at least one associative polymer comprising at least one C8-40 fatty chain, and also to a process for preparing such a photoprotective composition.

Abstract: The invention relates to a photoprotective composition containing as liquid phase, an oil-in-water emulsion, emulsified with at least one dimeric surfactant comprising two surfactant units, which may be identical or different, each consisting of a hydrophilic head and a hydrophobic tail and connected to each other, via the hydrophilic heads, by means of a spacer group, at least one photoprotective system capable of screening out UV rays, containing at least one mineral nanopigment based on metal oxide, and optionally at least one organic, preferably hydrosoluble or liposoluble UV-A and/or UV-B screening agent, and at least one associative polymer comprising at least one C8-40 fatty chain, and also to a process for preparing such a photoprotective composition.

Abstract: The invention concerns a cosmetic or dermatological composition structured by a polyamide, characterized in that it comprises at least an organic UV filter, and at least an amino acid N-acylated ester, its use in or for preparing compositions, in particular cosmetic and dermatological compositions for protecting the skin and/or the lips and/or skin appendages against ultraviolet radiation, in particular solar radiation. The invention also concerns a cosmetic treatment or protection method which consists in applying a cosmetic composition and, the use of at least an amino acid N-acylated ester in compositions structured by a polyamide containing an organic UV filter for enhancing solar protection factor of said composition.

Abstract: Oil-in-water photoprotective emulsions containing gemini surfactants and associative polymers The invention relates to a photoprotective composition containing as liquid phase, an oil-in-water emulsion, emulsified with at least one dimeric surfactant comprising two surfactant units, which may be identical or different, each consisting of a hydrophilic head and a hydrophobic tail and connected to each other, via the hydrophilic heads, by means of a spacer group, at least one photoprotective system capable of screening out UV rays, containing at least one mineral nanopigment based on metal oxide, and optionally at least one organic, preferably hydrosoluble or liposoluble UV-A and/or UV-B screening agent, and at least one associative polymer comprising at least one C8-40 fatty chain, and also to a process for preparing such a photoprotective composition.