Patent ID: 8323535
Filing Date: 2012-12-04
Classification: C09D,Y10T

Abstract:
1. A photochromic composition comprising multifunctional (meth)acrylate-based monomers having two or more functional groups, a photochromic dye and an aromatic vinyl compound, wherein the content of the aromatic vinyl compound is more than 30% by weight and 70% by weight or less, and the content of the multifunctional (meth)acrylate-based monomers having two or more function groups is more than 30% by weight, wherein the multifunctional (meth)acrylate-based monomers having two or more functional group further comprises one or mixtures of two or more selected from the group consisting of dipentaerythritol hexaacrylate (DPHA), dipentaerythritol hydroxy pentaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, trimethylene propyl triacrylate (TMPTA), propoxyate glycerol triacrylate and trimethylpropane ethoxy triacrylate; and wherein the photochromic composition further comprises a stabilizer, and the total content of the photochromic due and the stabilizer is 1.5% by weight to 5% by weight.