| abstract |
A photochromic plastic article that uses a photochromic coating, eliminates the need to introduce a photochromic compound into a plastic substrate, eliminates the need to develop a special optical resin material to be used with the photochromic compound, and Provided are coating compositions and articles thereof that facilitate the preparation of An article having a polyanhydride photochromic coating. This coating has a Fischer microhardness of 50 to 130 N / mm 2 and exhibits desirable photochromic properties, ie darker active color formation and faster rate of photochromic activity and fading upon UV irradiation. . [Selection figure] None |