Photochromic articles
A photochromic article that includes a host material and a photochromic amount of a benzopyran compound, the benzopyran compound represented by one of the formulas: wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are selected from hydrogen, a stable organic radical, a heterocyclic group, halogen...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A photochromic article that includes a host material and a photochromic amount of a benzopyran compound, the benzopyran compound represented by one of the formulas: wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are selected from hydrogen, a stable organic radical, a heterocyclic group, halogen, a nitrogen-substituted group, and a nitrogen-substituted ring compound. |
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