Patent ID: 8303858
Filing Date: 2012-11-06
Classification: C08G,G02B

Abstract:
1. A process comprising: contacting a first monomer with at least one photochromic monomer in a first solvent in the presence of a first base to form at least one polymer precursor; and contacting a second monomer with the at least one polymer precursor in a second solvent in the presence of a second base to form a photochromic polymer, wherein the first base and the second base are the same or different and are selected from the group consisting of pyridine, 1,8-Diazabicyclo[5.4.0]undec-7-ene and 4-(dimethylamino)pyridine, wherein the first solvent and the second solvent are the same or different and are selected from the group consisting of dichloromethane, chloroform, tetrachloromethane, benzene, toluene, and xylene; and wherein the second monomer is selected from the group consisting of bisphenols, diols, and combinations thereof.