Photochromic articles

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1997-07-17

1998-11-24

Lambkin, Deborah C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

252586, 351163, G02B 523, C07D31178, C07D40510

Patent

active

058409262

ABSTRACT:
A photochromic article that includes a host material and a photochromic amount of a naphthopyran compound, the naphthopyran compound represented by the formula: ##STR1## wherein R.sub.1 ', R.sub.2 ', R.sub.3 ', R.sub.4 ', R.sub.5 ', R.sub.6 ', R.sub.7 ', R.sub.8 ', R.sub.9 ', R.sub.10 ', R.sub.1 ", R.sub.2 ", R.sub.3 ", R.sub.4 ", R.sub.5 ", R.sub.6 ", R.sub.7 ", R.sub.8 ", R.sub.9 ", and R.sub.10 " are each selected from the following group: a stable organic radical, a heterocyclic group, halogen, a nitrogen-substituted group, and a nitrogen-substituted ring compound.

REFERENCES:
patent: 3567607 (1971-03-01), Saunders et al.
patent: 4818096 (1989-04-01), Heller et al.
patent: 4931221 (1990-06-01), Heller
patent: 5066818 (1991-11-01), Gemert et al.
patent: 5106998 (1992-04-01), Tanaka et al.
patent: 5238981 (1993-08-01), Knowles
patent: 5244602 (1993-09-01), Van Gemert
patent: 5274132 (1993-12-01), VanGemert
patent: 5464567 (1995-11-01), Knowles et al.

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