Substituted phenanthropyrans

The present invention relates to specific photochromic phenanthropyrans as well as to their use in synthetic resin materials of all types, especially for ophthalmic purposes. In particular, the present invention relates to photochromic compounds derived from 2H-phenanthro[2,1-b]pyrans and 3H-phenant...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MELZIG MANFRED, WEIGAND UDO, MANN CLAUDIA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMISTRY CONTACT LENSES FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING HETEROCYCLIC COMPOUNDS LIGHTING MECHANICAL ENGINEERING METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC CHEMISTRY PHYSICS SPECTACLES STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES WEAPONS
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Beschreibung
Zusammenfassung:	The present invention relates to specific photochromic phenanthropyrans as well as to their use in synthetic resin materials of all types, especially for ophthalmic purposes. In particular, the present invention relates to photochromic compounds derived from 2H-phenanthro[2,1-b]pyrans and 3H-phenanthro[3,4-b]pyrans, which in the open form have especially long wavelength absorption maxima, but in the unexcited state are still colorless.