Surface-coated metallic pigment, water base paint containing the same, and coated product to which water base paint has been applied

Abstract

A surface-coated metallic pigment according to the present invention includes base particles and a coating layer constituted of one layer, or two or more layers formed on a surface of the base particles, the coating layer having an outermost layer composed of a first compound obtained by polymerizing one monomer or oligomer, or two or more monomers or oligomers having one or more polymerizable double bonds, the outermost layer having a surface to which one surface modifier or two or more surface modifiers is/are bonded, and the surface modifier being a monomer or an oligomer having a bridged ring structure containing 9 to 12 carbon atoms and having one or more polymerizable double bonds.

1 . A surface-coated metallic pigment comprising:
 base particles; and   a coating layer constituted of one layer, or two or more layers formed on a surface of the base particle, wherein   said coating layer has an outermost layer composed of a first compound obtained by polymerizing one monomer or oligomer, or two or more monomers or oligomers having one or more polymerizable double bonds,   said outermost layer has a surface to which one surface modifier or two or more surface modifiers is/are bonded, and   said surface modifier is a monomer or an oligomer having a bridged ring structure containing 9 to 12 carbon atoms and having one or more polymerizable double bonds.   
     
     
         2 . The surface-coated metallic pigment according to  claim 1 , wherein
 said bridged ring structure is any of a dicyclopentanyl group that is substituted or unsubstituted, a dicyclopentenyl group that is substituted or unsubstituted, an isobornyl group that is substituted or unsubstituted, and an adamantyl group that is substituted or unsubstituted.   
     
     
         3 . The surface-coated metallic pigment according to  claim 1 , wherein
 said surface modifier is contained at a ratio of 0.005 to 10 parts by mass with respect to 100 parts by mass of said base particles.   
     
     
         4 . The surface-coated metallic pigment according to  claim 1 , wherein
 said first compound is obtained by polymerizing two or more monomers or oligomers, at least one of which is a monomer or an oligomer having a bridged ring structure containing 9 to 12 carbon atoms and having two or more polymerizable double bonds.   
     
     
         5 . The surface-coated metallic pigment according to  claim 4 , wherein
 said bridged ring structure of said first compound is a dicyclopentanyl group that is substituted or unsubstituted.   
     
     
         6 . The surface-coated metallic pigment according to  claim 4 , wherein
 said first compound is obtained by polymerizing two or more monomers or oligomers, in which the monomer or oligomer having a bridged ring structure containing 9 to 12 carbon atoms and having two or more polymerizable double bonds is contained at a ratio of 10 to 70 mass %.   
     
     
         7 . The surface-coated metallic pigment according to  claim 1 , wherein
 said base particle has a structure including a substrate, and an inorganic pigment and/or an organic pigment adhered to a surface of the substrate.   
     
     
         8 . The surface-coated metallic pigment according to  claim 1 , wherein
 said base particle includes a substrate, and one or more inorganic compound layers or metal layers having an interferential action and formed on a surface of the substrate.   
     
     
         9 . A water base paint comprising at least one type of the surface-coated metallic pigment according to  claim 1 . 
     
     
         10 . A coated product to which the water base paint according to  claim 9  has been applied.