Patent ID: 6114090
Filing Date: 2000-09-05
Classification: G02B

Abstract:
A method of thermally stabilizing an optically transparent waveguide, which waveguide comprises a patterned photopolymer on a substrate formed by photopolymerizing a photopolymerizable composition, the photopolymerizable composition comprising one or more unsaturated monomers selected from the group consisting of 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, ethoxylated trimethylolpropane triacrylate, glyceryl, propoxylated triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate and di(trimethylolpropane) tetraacrylate, and at least one photoinitiator capable of activating polymerization of said monomers when said photopolymerizable composition is exposed to actinic radiation the method comprising incorporating into said photopolymerizable composition from about 35% to about 99.9% by weight of the photopolymerizable composition of at least one ethylenically unsaturated monomer selected from the group consisting of ethoxylated bisphenol A diacrylate, ethoxylated hexafluorobisphenol A diacrylate, and propoxylated bisphenol A diacrylate wherein said photopolymer exhibits a coloration on the Gardner Color Scale equal to or less than 8 as determined by ASTM D1544-80 upon exposure to a temperature of 190.degree. C. in air for 24 hours.