Screening cosmetic composition comprising one nanopigment of metallic oxide and one fat-soluble screening polymer

Screening cosmetic composition comprising, in a comsmetically acceptable carrier, at least one nanopigment of metallic oxides selected from the group consisting of titanium, zinc, cerium, zirconium and iron oxides and mixtures thereof, with a mean diameter of less than 100 nm, and at least one polymer carrying at least one ultraviolet-absorbing group which is a fat-soluble polymer with a siloxane structure, said polymer with siloxane structure consisting of a diorganopolysiloxane containing in its molecule at least one unit of formula:

• in which
• R′ denotes a saturated or unsaturated C1-C30 hydrocarbon group, a halogenated C1-C8 hydrocarbon group or a trimethylsilyloxy group;
• a=1 or 2;
• X=—A—Y
• where A represents a divalent aliphatic or aromatic hydrocarbon radical containing at least 2 carbon atoms and optionally containing one or more oxygen atoms, and
• Y represents the residue of an ultraviolet radiation-screening molecule, which is a 2-(2′-hydroxyphenyl)benzotriazole residue which is unsubstituted or carrying on one of the aromatic nuclei C1-C8 alkyl, C2-C8 alkenyl, halogen, alkoxy, carboxy, hydroxy or amino substituents.