Photochromic 3H-naphtho[2,1-b]-pyran compounds and photochromic articles produced therewith

Specific photochromic 3H-naphtho[2,1-b]-pyran compounds useful with various types of synthetic resin materials to form photochromic articles, especially ophthalmic lenses, and photochromic articles formed with such compounds. The compounds of the invention have especially long-wave absorption maxima...

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Bibliographische Detailangaben

Hauptverfasser:	Mann, Claudia, Melzig, Manfred, Weigand, Udo
Format:	Patent
Sprache:	eng
Online-Zugang:	Volltext bestellen
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