Patent ID: 8647736
Filing Date: 2014-02-11
Classification: C09D,G02B,Y10T

Abstract:
1. An optical article comprising a plastic substrate and a first layer formed on the plastic substrate, the first layer having a refractive index decreasing in a direction away from the plastic substrate, and the first layer being formed using a first composition including two or more kinds of polyurethane resins each having a different average particle diameter, metal oxide particulates, and an organosilicon compound, wherein the first composition includes: (i) a first small-diameter polyurethane resin having an average particle diameter d11, (ii) a second small-diameter polyurethane resin having an average particle diameter d12, and (iii) a large-diameter polyurethane resin having an average particle diameter d2, and the first small-diameter polyurethane resin, the second small-diameter polyurethane resin and the large-diameter polyurethane resin have a different average particle diameter, and d11, d12 and d2 satisfy the following conditional expression: