POLYMER MICROPARTICLE COMPOSITION AND USE THEREOF AS LIGHT DIFFUSING AGENT

摘要

The present invention addresses the problem of providing a high-refractive-index acrylic microparticle composition for contributing to increased functionality of a light-diffusing sheet substrate used in a liquid crystal display device or the like in which reduced thickness and increased luminance are sought, and the abovementioned problem is solved through use of a polymer microparticle composition having an average particle diameter in the range of 1-5 µm and a refractive index in the range of 1.60-1.62, the polymer microparticle composition being obtained by copolymerization of 98-70% by mass of an ethoxylated-o-phenylphenol (meth)acrylate compound and 2-30% by mass of a divinyl compound having a smaller molecular weight than the aforementioned compound (the total of both compounds being 100% by mass).