Photochromic chromene compounds

Details Photochromic chromene compounds Photochromic chromene compounds

1990-07-23

1993-04-06

Stoll, Robert L.

Compositions

Light transmission modifying compositions

Displaying color change

252589, 544179, 544180, 544182, 544238, 544333, 544336, 544358, 546196, 546269, 546339, 549 60, 549389, 549390, 549391, 549398, 549399, 549406, 549408, 548100, 548146, 548214, G02B 523, C07D31180, C07D31104, C07D25100

Patent

active

052001164

ABSTRACT:
Described are a series of novel photochromic benzopyran and naphthopyran compounds substituted with (1) a cyclopropyl group and (2) a phenyl, substituted phenyl, or 5-member aromatic heterocyclic group at the 2-position of the benzopyran or naphthopyran ring. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic or plano lenses that incorporate the novel pyran compounds or combinations of the novel pyran compounds with other complementary photochromic compounds are described.

REFERENCES:
patent: 3562172 (1971-02-01), Ono et al.
patent: 3567605 (1971-03-01), Becker
patent: 3578602 (1971-05-01), Ono et al.
patent: 3627690 (1971-12-01), Casella
patent: 3973966 (1976-08-01), Flannery et al.
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4238501 (1980-12-01), Kabbe et al.
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4563458 (1986-01-01), Widdig et al.
patent: 4637698 (1987-01-01), Kwak et al.
patent: 4816584 (1989-03-01), Kwak et al.
patent: 4818096 (1989-04-01), Heller et al.
patent: 4826977 (1989-05-01), Heller et al.
patent: 4931221 (1990-06-01), Heller
patent: 4946880 (1990-08-01), Costanzi
patent: 4990287 (1991-02-01), Bennion et al.
Padwa et al. J. Org. Chem. vol. 40, No. 8, 1975, 1142.

Affiliated with

Also associated with

Rating

Photochromic chromene compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photochromic chromene compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photochromic chromene compounds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-534294