Photochromic naphthopyran compositions of improved fatigue resistance
作者： Michael S. Misura
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摘要: Describes a composition of carrier, e.g., organic solvent or polymeric host material, photochromic naphthopyran and stabilizer system comprising (a) polyphenolic antioxidant (b) ultraviolet light absorber (c) hindered amine for said material. The is selected used in amounts sufficient to provide at least 30 % reduction photopic fatigue the weight ratio from 2.5:1 1.5:1. can comprise 5 50 percent absorbent, 10 90 stabilizer.
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