Photochromic [3H]naphtho[2,1-b]pyran compounds containing an acetylenic substituent, process for their manufacture, and photochromic materials and articles obtained
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsMichel Frigoli, Corinne Moustrou, André Samat, Robert Guglielmetti
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Abstract
The present invention relates to photochromic [3H]naphtho[2,1-b]pyran compounds containing an acetylenic substituent, process for their manufacture, and photochromic materials and articles obtained therefrom. The invention, in some specific aspects, relates to photochromic compounds having a [3H]naphtho-[2,1-b]pyran structure and bearing an acetylenic group in one of the positions 7 to 10 of the naphthopyran ring structure.
Claims15
Photochromic compound having [3H]naphtho-[2,1-b]pyran structure and bearing an acetylenic group directly linked to one of the positions 7 to 10 of the naphthopyran ring structure through a carbon of the acetylenic group.
Dependencies are inferred from the claim text.