| 摘要 |
PURPOSE:To obtain the title material excellent in light fatigue resistance, high response, and color density by using a specified spiroindolinonaphthoxazine derivative. CONSTITUTION:This material comprises a spiroindolinonaphthoxazine derivative of formula I, wherein A is an arylenedicarbonyl group of, e.g., formula V or an arylene group of, e.g., formula VI; R is a group of any one of formulas II-IV; S1-4 and S'2 are groups known as the substituents of a photochromic spiroindolinonaphthoxazine compound and desirably selected from a halogen atom, a (halogenated) lower alkyl, a lower alkoxyl, a nitro and a cyano. |
