Patent ID: 6113812
Filing Date: 2000-09-05
Classification: C07D,G02B

Abstract:
A photochromic article comprising a host material and a photochromic amount of a benzopyran compound, the benzopyran compound represented by the formula: ##STR8## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.6 ', R.sub.7 ', R.sub.8 ', and R.sub.9 ' are selected from the group consisting of hydrogen, alkyl, alkoxy, substituted phenyl, unsubstituted phenyl, substituted phenoxy, unsubstituted phenoxy, naphthyl, naphthoxy, cycloalkyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, halogen, amino, dialkyl amino, nitro, morpholino, piperidino, and piperazino, provided that:at least one of R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, and R.sub.9 is selected from the group consisting of substituted phenyl, unsubstituted phenyl, substituted phenoxy, unsubstituted phenoxy, naphthyl, naphthoxy, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, nitro, morpholino, piperidino, and piperazino.