Process for obtaining a photochromic compound and products obtai

Details Process for obtaining a photochromic compound and products obtai Process for obtaining a photochromic compound and products obtai

1997-07-03

1999-06-29

Tucker, Philip

Compositions

Light transmission modifying compositions

Displaying color change

252584, 430266, 430568, G02B 523

Patent

active

059164875

ABSTRACT:
The invention relates to a process for obtaining a photochromic compound based on a transparent polymer matrix, in which:

REFERENCES:
patent: 3672901 (1972-06-01), Ohkubo et al.
patent: 3708304 (1973-01-01), Hiller
patent: 3957490 (1976-05-01), Libber et al.
patent: 4049567 (1977-09-01), Chu et al.
patent: 4332889 (1982-06-01), Siga et al.
patent: 5015416 (1991-05-01), Reid
patent: 5073303 (1991-12-01), Reid
patent: 5256337 (1993-10-01), Reid et al.

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