Patent ID: 9139745
Filing Date: 2015-09-22
Classification: B82Y,C01F,C01P,C09D

Abstract:
1. An aggregate of cerium oxide/polymer nanoparticles for an optical device having a high refractive index, the cerium oxide/polymer nanoparticles are spherical core-shell cerium oxide/polymer hybrid nanoparticles having a spherical secondary particle formed by assembled cerium oxide primary particles having a size range of 2 nm to 3 nm serving as the core and a crosslinked polymer serving as the shell, wherein 1) the aggregate is highly concentrated, with a volume fraction of the spherical core-shell cerium oxide/polymer hybrid nanoparticles being at least 32%; 2) the aggregate contains a fixing agent made from a resin; 3) the aggregate is configured such that the fixing agent fills in voids between the spherical core-shell cerium oxide/polymer hybrid nanoparticles; 4) the aggregate has a uniform distribution of the spherical core-shell cerium oxide/polymer hybrid nanoparticles; and 5) the aggregate has the mechanical strength resistant to destruction by scraping with a metal rod and no silane coupling agent or surfactant is present on a surface of the core of the spherical core-shell cerium oxide/polymer hybrid nanoparticles.