Photochromic spironaphthopyran compounds
AssigneeVision-Ease Lens, Inc.
InventorsFrank J. Hughes, Edward A. Travnicek
Life of this patent
Estimating the term…
Abstract
A naphthopyran compound represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are each selected from the group consisting essentially of hydrogen, a stable organic radical, a heterocyclic group, a halogen, a nitrogen-substituted group, and a nitrogen-substituted ring compound and wherein A is a substituted divalent aromatic radical that includes substituents selected from the group consisting essentially of hydrogen and the stable organic radical.
Claims33
A photochromic article comprising a host material and a photochromic amount of a naphthopyran compound, the naphthopyran compound represented by the formula:
- ##STR22## wherein, R.sub.1, R.sub.2, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are each selected from the group consisting of hydrogen, alkyl, alkoxy, phenyl, naphthyl, cycloalkyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, a heterocyclic group, a halogen, amino, nitro, morpholino, piperidino, and piperazino;
- and
- A is a substituted divalent aromatic radical, the substituents of the divalent aromatic radical selected from the group consisting of hydrogen, alkyl, alkoxy, phenyl, naphthyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, and cycloalkyl with the proviso that cyclopentyl and cyclohexyl are excluded.
The photochromic article of claim 19 wherein the first aromatic ring radical and the second aromatic ring radical are selected from the group consisting of phenyl and naphthyl.
A naphthopyran compound, the naphthopyran compound represented by the formula:
- ##STR28## wherein, R.sub.1, R.sub.2, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are each selected from the group consisting of hydrogen, a heterocyclic group, halogen, alkyl, alkoxy, phenyl, naphthyl, cycloalkyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, amino, nitro, morpholino, piperidino, and piperazino;
- and
- A is a substituted divalent aromatic radical, the substituents of the divalent aromatic radical selected from the group consisting of hydrogen, alkyl, alkoxy, phenyl, naphthyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, and cycloalkyl with the proviso that cyclopentyl and cyclohexyl are exluded.
Dependencies are inferred from the claim text.