Photochromic compound and articles containing the same

Details Photochromic compound and articles containing the same Photochromic compound and articles containing the same

1988-05-17

1990-06-26

Terapane, John F.

Compositions

Light transmission modifying compositions

Displaying color change

252582, 544 70, 544 71, G02B 523

Patent

active

049369954

ABSTRACT:
Described are novel spiro(benzindolino) benzoxazine compounds and compositions containing such compounds. Photochromic sprio(benzindolino) benzoxazines may be incorporated into plastic host materials to produce photochromic articles.

REFERENCES:
patent: 3291604 (1966-12-01), Michel et al.
patent: 3562172 (1971-02-01), Ono et al.
patent: 3578602 (1971-05-01), Ono et al.
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4637698 (1987-01-01), Kwak et al.
patent: 4719296 (1988-01-01), Irie et al.
Galbershtan, M. A. et al, Khim Geterotsikl Soedin, 1976, No. 6, 815-16.

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