| abstract |
Disclosed are aqueous dispersions (A), comprising a micronized organic UV filter (a) selected from (a 1 ) the micronized compound of formula (1), wherein R 1 and R 2 independently from each other are C 1 -C 20 alkyl; C 2 -C 20 alkenyl; C 3 -C 10 cycloalkyl; C 3 -C 10 cycloalkenyl; or R 1 and R 2 together with the linking nitrogen atom form a 5- or 6-membered heterocyclic ring; A is— N(R 3 )-; −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 *— CH 2 — C≡=C— CH 2 —*; or the divalent radical *-B-* corresponds to the formula (1a), wherein n 1 is a number from 1 to 3; A is —N(R 3 )-; or −O-; and R 3 is hydrogen; C 1 -C 5 alkyl; or hydroxy-C 1 -C 5 alkyl; (a 2 ) the micronized compound of formula (2), wherein T 1 is hydrogen; C 1 -C 12 alkyl; preferably iso-octyl, or C 1 -C 4 alkyl substituted by phenyl; (a 3 ) the micronized compound of formula (3a); wherein R 4 and R 5 independently from each other are hydrogen; C 1 -C 18 alkyl; or C 6 -C 12 acryl; R 6 , R 7 and R 8 independently from each other, are hydrogen; C 1 -C 18 alkyl; or a radical of formula (3b); wherein R 9 , R 10 and R 11 independently from each other, are hydrogen; or C 1 -C 18 alkyl; (a 4 ) the micronized compound of formula (4); wherein R 12 and R 13 , independently from each other, represent hydrogen; halogen; C 1 -C 12 alkyl: C 1 -C 18 hydroxy; C 1 -C 18 alkoxy; poly(ethoxy)-alkoxy with a C 1 -C 4 alkyl fragment and an ethoxy number ranging from 1 to 4; C 1 -C 4 mono- or dialkyl amino, R 14 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 C 1 -C 12 alkoxy or cyano or C 1 -C 7 alkyl-amino group; and (b) a vinylpyrrolidone copolymer or homopolymer. |