Chromene compounds and photochromic materials

Details Chromene compounds and photochromic materials Chromene compounds and photochromic materials

1996-12-06

1998-09-15

Gerstl, Robert

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

252586, 359885, 546196, 548203, 548235, 548525, 549 58, 549389, C07D40901

Patent

active

058081003

ABSTRACT:
A photochromic compound which is initially colored less, exhibits excellent durability and features high color density and high color fading rate, and a photochromic material thereof. The photochromic compound basically has two aromatic heterocyclic groups or an aromatic heterocyclic group and a naphthyl group at the third position, and has a benzene ring that is condensed at the f-th position.

REFERENCES:
patent: 3567605 (1971-03-01), Becker
patent: 5200116 (1993-04-01), Heller
patent: 5238981 (1993-08-01), Knowles
patent: 5543533 (1996-08-01), Allegrini
Patent Abstracts of Japan, vol. 95, No. 11, 26 Dec. 1995 and JP 07 206858 A (Hodogaya Chem. Co.), 8 Aug. 1995.

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