Patent ID: 7579022
Filing Date: 2009-08-25
Classification: C07D,C09B,C09K,G02B,G02F,G03C

Abstract:
1. A photochromic compound represented by Formula XII: wherein: (a) A is chosen from naphtho, benzo, phenanthro, fluorantheno, antheno, quinolino, thieno, furo, indolo, indolino, indeno, benzofuro, benzothieno, thiopheno, indeno-fused naphtho, heterocyclic-fused naphtho, and heterocyclic-fused benzo; (b) Y is N; (c) SP is a spiro-group chosen from indolino and benzindolino; and (d) i is an integer chosen from 0 to the total number of available positions on A, r is an integer chosen from 0 to the total number available positions on SP, provided that the sum of i+r is at least one, and each R provided that the photochromic compound comprises at least one lengthening agent L and each lengthening agent L is independently chosen for each occurrence from a compound represented by Formula I: wherein: (a) each Q (b) c, d, e, and f are each independently chosen from an integer ranging from 0 to 20, inclusive; and each S provided that when two spacer units comprising heteroatoms are linked together the spacer units are linked so that heteroatoms are not directly linked to each other and when S 1 and S 5 are linked to PC and P, respectively, they are linked so that two heteroatoms are not directly linked to each other; (c) P is chosen from: aziridinyl, hydrogen, hydroxy, aryl, alkyl, alkoxy, amino, alkylamino, alkylalkoxy, alkoxyalkoxy, nitro, polyalkyl ether, (C (d) d′, e′ and f′ are each independently chosen from 0, 1, 2, 3, and 4, provided that a sum of d′+e′+f′ is at least 2.