PHOTOCHROMIC MULTIPLE RING-FUSED NAPHTHOPYRANS HAVING EXTREME LONGWAVE ABSORPTION EXTENDING FAR INTO THE VISIBLE WAVELENGTH RANGE

The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.

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Bibliographic Details
Main Authors WEIGAND, Udo, ZINNER, Herbert
Format Patent
LanguageEnglish
French
German
Published 07.10.2020
Subjects
ADHESIVES
CHEMISTRY
DYES
HETEROCYCLIC COMPOUNDS
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORGANIC CHEMISTRY
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
PHYSICS
POLISHES
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Summary:The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.
Bibliography:Application Number: EP20170731064