Patent ID: 8518305
Filing Date: 2013-08-27
Classification: C07F,C09K,G03C

Abstract:
1. A photochromic material comprising, a photochromic compound comprising a photochromic substituent selected from the group consisting of photochromic pyrans, photochromic oxazines, and thermally reversible photochromic fulgides, wherein the photochromic substituent has bonded thereto at least one pendent silane group selected from the group consisting of, (i) pendent silane groups represented by the following general formula I, (ii) pendent silane groups represented by the following general formula II, and combinations thereof, wherein Z, R, R 1 , m, n and L are each independently as described with regard to general formula (I), R a is a divalent linking group selected from divalent organic moieties, R b is selected from hydrogen or C 1 -C 10 hydrocarbyl, t is 0, 1 or 2, and y is 1, 2 or 3, provided that the sum of t and y is 3, wherein said divalent linking group of each L is independently selected from the group consisting of, wherein each R R R p is from 1 to 100, and p′ is from 1 to 10.