VINYL POLYMER MICROPARTICLES, METHOD FOR PRODUCING SAME, RESIN COMPOSITION, AND OPTICAL MATERIAL

摘要

The purpose of the present invention is to provide vinyl polymer microparticles that are ideal as an additive for a film as the particles have a specific grain size distribution, but the number of coarse particles is reduced. Also provided is a method for producing these microparticles. Moreover, the present invention provides a resin composition comprising the microparticles, an optical film obtained from the resin composition, and a light-diffusing film. With respect to these vinyl polymer microparticles, the particle diameter variation coefficient of a volume standard is at least 10% and the number of coarse particles having a particle diameter that is at least twice the volume-average particle diameter is no more than 180 out of 1 million microparticles.