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Photochromic Performance Of Spiroindolinonaphthoxazines In Plastics

Spiroindolinonaphthoxazine compounds exhibit good photochromic effect and excellent light fatigue resistance in organic solvents as well as in plastics. Further improvement in the light fatigue resistance can be achieved by organo-nickel light stabilizers without impairing the photocolorability of the photochromic compound. The photochromic performance of a spiroindolinonaphthoxazine derivative in CAB including darkening and fading kinetics, temperature dependence, and fatigue characteristics is presented in detail.