Patent ID: 7582749
Filing Date: 2009-09-01
Classification: C07D,C09B,C09K,G02B,G02F,G03C

Abstract:
1. A non-thermally reversible photochromic compound represented by one of Formula X and Formula XI: wherein: (a) A is chosen from naphthol benzo, phenanthro, fluorantheno, antheno, quinolino, thieno, furo, indolo, indolino, indeno, benzofuro, benzothieno, thiopheno, indeno-fused naphthol, heterocyclic-fused naphthol, and heterocyclic-fused benzo; (b) Y′ is chosen from: —(Y (c) B is chosen from: (d) i is an integer chosen from 0 to 4, and each R provided that the non-thermally reversible 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 (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 1.