TEMPERATURE STABLE AND SUNLIGHT PROTECTED PHOTOCHROMIC ARTICLES

摘要

Described is a photochromic composition which is a polymerizate of acrylate monomer(s), a cross-linking amount of anhydrous acrylic anhydride and/or anhydrous methacrylate anhydride and a photochromic amount of pyrido benzoxazine. Depending on the amount of cross-linking agents and the other components selected to form the polymerizate, the polymerizate will exhibit improved temperature stability with regard to photocolorability and/or prevention of activation in sunlight.