Optical article comprising a dye resistant to photo-degradation
AssigneeEssilor International
InventorsHaipeng ZHENG, Prakhar KASTURE
Life of this patent
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Abstract
The present invention relates to optical articles and optical filtering coatings comprising at least one absorbing dye comprising one of the groups of formulae of formulae (I), (II), (III) and (IV), wherein R represents an aryl or alkyi group, and the groups of formulae (I), (II), (III) and (IV) have at least one carbon atom substituted with a group chosen from —OH, —CN, bromo, —NO2, alkoxy, aryloxy, —COOH, —CHO, —COalkyl, —COaryl, haloalkyl, —SH, —S-alkyl, —S-aryl, —SO2alkyl, —OSO2alkyl, —SO2aryl, —OSO2aryl and sulfonamide, or have at least two carbon atoms substituted with a chloro group.
Claims16
-15. (canceled)
An optical article comprising at least one absorbing dye comprising any one of the following formulae:
- wherein R represents an aryl or alkyl group, X1 and X2 independently represent O or a N-R1 group with R1 representing an alkyl or aryl group, and the groups of formulae (I), (II) and (III) have at least one carbon atom substituted with a group chosen from —OH, —CN, bromo, —NO2, alkoxy, aryloxy, —CO2H, —CHO, —COalkyl, —COaryl, haloalkyl, —SH, —S-alkyl, —S-aryl, —SO2alkyl, —OSO2alkyl, —SO2aryl and —OSO2aryl, or have at least two carbon atoms substituted with a chloro group, and wherein the dye of formula (III) does not comprise any SO3H group or a salt thereof, and the dye of formula (II) is not a compound having any one of the following formulae:
An optical filtering coating for an optical article comprising at least one absorbing dye comprising any one of the following formulae:
- wherein R represents an aryl or alkyl group, X1 and X2 independently represent O or a N-R1 group with R1 representing an alkyl or aryl group, and the groups of formulae (I), (II), (III) and (IV) have at least one carbon atom substituted with a group chosen from —OH, —CN, bromo, —NO2, alkoxy, aryloxy, —CO2H, —CHO, —COalkyl, —COaryl, haloalkyl, —SH, —S-alkyl, —S-aryl, —SO2alkyl, —OSO2alkyl, —SO2aryl, —OSO2aryl and sulfonamide, or have at least two carbon atoms substituted with a chloro group, and wherein the dye of formula (III) does not comprise any SO3H group or a salt thereof.
A process for at least partially inhibiting transmission of light in at least one selected wavelength range, comprising the incorporation in an optical article of an absorbing dye comprising any one of the following formulae:
- wherein R represents an aryl or alkyl group, X1 and X2 independently represent O or a N-R1 group with R1 representing an alkyl or aryl group, and the groups of formulae (I), (II) and (III) have at least one carbon atom substituted with a group chosen from —OH, —CN, bromo, —NO2, alkoxy, aryloxy, —CO2H, —CHO, —COalkyl, —COaryl, haloalkyl, —SH, —S-alkyl, —S-aryl, —SO2alkyl, —OSO2alkyl, —SO2aryl and —OSO2aryl, or have at least two carbon atoms substituted with a chloro group, and wherein the dye of formula (III) does not comprise any SO3H group or a salt thereof, and the dye of formula (II) is not a compound having any one of the following formulae:
Dependencies are inferred from the claim text.