Photochromic composition

Details Photochromic composition Photochromic composition

1994-02-01

1995-07-11

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430343, 430962, 430281, 430286, 430280, 430338, 252586, 522 53, 522 63, G03C 173, G03F 7004

Patent

active

054320496

ABSTRACT:
Compounds of the formula I ##STR1## in which X is O, S, SO, SO.sub.2 or NR.sub.13, R.sub.13 is, for example, methyl, and R.sub.1 to R.sub.12, independently of one another, are, for example, H, C.sub.1 -C.sub.12 alkyl, C.sub.1 14 C.sub.12 alkoxy, halogen or --CN. The compounds are photosensitive and photochromic and as suitable are photosensitizers and simultaneously as colour indicators, and as photoswitchable colour filters.

REFERENCES:
patent: 3706768 (1972-12-01), Bays et al.
patent: 3752813 (1973-08-01), Shen et al.
patent: 4506083 (1985-03-01), Kirta et al.
patent: 4585876 (1986-04-01), Fischer et al.
patent: 4681950 (1987-07-01), Fischer et al.
Derw. Abst. 83-744573/34 (1983).
B. K. Manukian, Helv. Chim Acta. vol. 59, 2609 (1976).
Chem. Abst. vol. 53 (1959) 411c.

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