Disclosed are aqueous dispersions (A), comprising a micronized organic UV filter (a) selected from (a1) the micronized compound of formula (1), wherein R1 and R2 independently from each other are C1-C20alkyl； C2-C20alkenyl； C3-C10cycloalkyl； C3-C10cycloalkenyl； or R1 and R2 together with the linking nitrogen atom form a 5- or 6-membered heterocyclic ring； A is— N(R3)-； −O-； or the direct bond； B is a bivalent radical selected from alkylene, cycloalkylene alkenylene or phenylene radical which is optionally substituted by a carbonyl- or carboxy group； a radical of formula *— CH2— C≡=C— CH2—*； or the divalent radical *-B-* corresponds to the formula (1a), wherein n1 is a number from 1 to 3； A is —N(R3)-； or −O-； and R3 is hydrogen； C1-C5alkyl； or hydroxy-C1-C5alkyl； (a2) the micronized compound of formula (2), wherein T1 is hydrogen； C1-C12alkyl； preferably iso-octyl, or C1-C4alkyl substituted by phenyl； (a3) the micronized compound of formula (3a)； wherein R4 and R5 independently from each other are hydrogen； C1-C18alkyl； or C6-C12acryl； R6, R7 and R8 independently from each other, are hydrogen； C1-C18alkyl； or a radical of formula (3b)； wherein R9, R10 and R11 independently from each other, are hydrogen； or C1-C18alkyl； (a4) the micronized compound of formula (4)； wherein R12 and R13, independently from each other, represent hydrogen； halogen； C1-C12alkyl: C1-C18hydroxy； C1-C18alkoxy； poly(ethoxy)-alkoxy with a C1-C4 alkyl fragment and an ethoxy number ranging from 1 to 4； C1-C4mono- or dialkyl amino, R14 represents halogen； hydroxy； amino； phenyl which is optionally substituted 1 to 3 times by a hydroxy radical situated at least in a para or phenyl position, possibly 1 to 3 times substituted in an ortho, meta or para position by a C1-C12alkoxy or cyano or C1-C7alkyl-amino group； and (b) a vinylpyrrolidone copolymer or homopolymer.La présente invention concerne des dispersions aqueuses (A), comprenant un filtre UV organique micronisé (a) choisi parmi (a1) le composé
