Abstract: The present invention provides an aggregate of spherical core-shell cerium oxide/polymer hybrid nanoparticles, a process for producing the same, and a product such as an anti-reflection film having a high refractive index layer.

Abstract: The invention provides a method for manufacturing spherical, monodispersed core-shell type ceria-polymer hybrid nanoparticles including, a mixing step in which a cerium salt and a polymer are mixed together in a high-boiling-point organic solvent to obtain a mixture, and a heating and reflux step in which this mixture is heated and refluxed at a temperature of 110° C. or more to thereby generate a boiling phenomenon in the heating and reflux step, and rapidly cooling the mixture after the heating and reflux step to precipitate cerium oxide, and a liquid dispersion thereof.

Abstract: Disclosed herein are core-shell type zinc oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion. As disclosed herein, the core-shell type zinc oxide microparticles have an average particle diameter of from 50 to 1,000 nm. The core is a secondary particle of spherical shape to the surface of which a polymer is attached as a shell. Methods for making the microparticles include the steps of: mixing together a zinc salt and a polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type zinc oxide microparticles to precipitate, wherein the zinc salt is zinc acetate; and uses such as cosmetics, resins and fibers which contain the core-shell type zinc oxide microparticles and have an ultraviolet light blocking action.

Abstract: The present invention provides an aggregate of spherical core-shell cerium oxide/polymer hybrid nanoparticles, a process for producing the same, and a product such as an anti-reflection film having a high refractive index layer.

Abstract: The objects of the present invention are to provide core-shell type cobalt oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion, and the invention is directed at: core-shell type cobalt oxide microparticles having an average particle diameter of from 50 to 200 nm, wherein the core is a secondary particle of spherical shape to a surface of which an organic polymer is attached as the shell; a dispersion of such cobalt oxide microparticles; a dry powder obtained from such a cobalt oxide microparticle dispersion; a process for producing core-shell type cobalt oxide microparticles or a dispersion thereof, which process includes the steps of: mixing together a cobalt salt and an organic polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type cobalt oxide microparticles to precipitate, wherein the cobalt salt is cobalt acetate; and u

Abstract: The objects of the present invention are to provide core-shell type zinc oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion, and the invention is directed at: core-shell type zinc oxide microparticles having an average particle diameter of from 50 to 1,000 nm, wherein a core is a secondary particle of spherical shape to the surface of which a polymer is attached as a shell; a dispersion of such zinc oxide microparticles; a dry powder obtained from such a zinc oxide microparticle dispersion; a process for producing core-shell type zinc oxide microparticles or a dispersion thereof, which process includes the steps of: mixing together a zinc salt and a polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type zinc oxide microparticles to precipitate, wherein the zinc salt is zinc acetate; and uses such as cosmetics, resins and fi

Abstract: The invention provides a method for manufacturing spherical, monodispersed core-shell type ceria-polymer hybrid nanoparticles including, a mixing step in which a cerium salt and a polymer are mixed together in a high-boiling-point organic solvent to obtain a mixture, and a heating and reflux step in which this mixture is heated and refluxed at a temperature of 110° C. or more to thereby generate a boiling phenomenon in the heating and reflux step, and rapidly cooling the mixture after the heating and reflux step to precipitate cerium oxide, and a liquid dispersion thereof.