C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 311/92 (2006.01) C09K 9/02 (2006.01) G02B 5/23 (2006.01) G03C 1/73 (2006.01)
Patent
CA 2667905
Various photochromic materials are provided that are essentially free of polymerizable unsaturated groups, and comprise: a) an indeno[2',3':3,4]naphtho[1,2-b]pyran; and b) an electron-withdrawing, non-conjugating group bonded at the 11-position of the indeno[2',3':3,4]naphtho[1,2-b]pyran. Alternative embodiments include various substituents at other positions of the indeno[2',3':3,4]naphtho[1,2-b]pyran. Also provided are photochromic articles including a substrate and one of the above photochromic materials, in contact with at least a portion of the substrate.
L'invention concerne divers matériaux photochromes qui sont sensiblement exempts de groupements insaturés polymérisables et qui comprennent : a) un indéno[2',3':3,4]naphto[1,2-b] pyrane ; et b) un groupement accepteur d'électrons, non conjuguant, relié à la position 11 de l'indéno[2',3':3,4]naphto[1,2-b] pyrane. D'autres modes de réalisation comprennent divers substituants à d'autres positions de l'indéno[2',3':3,4]naphto[1,2-b] pyrane. L'invention concerne également des articles photochromes comprenant un substrat et un des matériaux photochromes précédents, en contact avec au moins une partie du substrat.
Brown Patrick M.
Chopra Anu
Borden Ladner Gervais Llp
Transitions Optical Inc.
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