ULTRAVIOLET RAY ABSORBER WATER-BASED COATING COMPOSITION

[Problem] The present invention provides: a water-based coating composition containing an ultraviolet ray absorber, which has excellent transparency and satisfactorily blocks ultraviolet ray; and a method for producing the water-based coating composition. [Solution] Provided is a water-based coating...

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1. Verfasser: IDE Yasuhiro
Format: Patent
Sprache:eng ; fre ; jpn
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Zusammenfassung:[Problem] The present invention provides: a water-based coating composition containing an ultraviolet ray absorber, which has excellent transparency and satisfactorily blocks ultraviolet ray; and a method for producing the water-based coating composition. [Solution] Provided is a water-based coating composition containing an ultraviolet ray absorber, the water-based coating composition being characterized by comprising at least an ultraviolet ray absorber, a dispersing agent and a resin component all present in a water-based solvent, in which the ultraviolet ray absorber is a compound represented by general formula (I). In general formula (I), R1 and R1' may be the same as or different from each other and each independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, a perfluoroalkyl group having 1 to 12 carbon atoms, a R3SO- group, or a R3O2- group; R2 and R2' may be the same as or different from each other and each independently represent an alkyl group having 1 to 12 carbon atoms, an alkyl group having 1 to 12 carbon atoms which is substituted by a CO2H group, a phenyl group, a phenylalkyl group in which 1 to 4 carbon atoms are contained in an alkyl group moiety, or a cycloalkyl group having 5 to 8 carbon atoms; R3 represents an alkyl group having 1 to 20 carbon atoms, a hydroxyalkyl group having 2 to 20 carbon atoms, an alkyl group which is substituted by an alkoxycarbonyl group having 2 to 9 carbon atoms, an alkenyl group having 3 to 18 carbon atoms, a cycloalkyl group having 5 to 12 carbon atoms, a phenylalkyl group having 7 to 15 carbon atoms, an aryl group having 6 to 10 carbon atoms, or the aryl group which is substituted by one or two alkyl groups each having 1 to 4 carbon atoms, or a 1,1,2,2-tetrahydroperfluoroalkyl group (in which a perfluoroalkyl moiety in this group is composed of 6 to 16 carbon atoms). Le problème décrit par la présente invention est de fournir : une composition de revêtement à base d'eau contenant un absorbeur de rayons ultraviolets, qui présente une excellente transparence et bloque de manière satisfaisante les rayons ultraviolets ; et un procédé de production de la composition de revêtement à base d'eau. La solution selon l'invention porte sur une composition de revêtement à base d'eau contenant un absorbeur de rayons ultraviolets, la composition de revêtement à base d'eau étant caractérisée en ce qu'elle comprend au moins un absorbeur de rayons ultraviolets, un agent de dispersion et un compo