Photochromic 3-pyrryl fulgides and fulgimides

Details Photochromic 3-pyrryl fulgides and fulgimides Photochromic 3-pyrryl fulgides and fulgimides

1986-01-24

1988-04-12

Berch, Mark L.

Radiation imagery chemistry: process, composition, or product th

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

Composition or product

430342, 430945, 430962, 548517, 548518, G03C 1733, C07D40506, C07D40906

Patent

active

047374497

ABSTRACT:
A series of novel 3-pyrryl fulgides and fulgimides are disclosed which are photochromic. The photochromic compounds are coloured by subjecting them to irradiation in the near ultraviolet and will revert to the colourless form on exposure to visible light, especially light having a wavelength in 600 to 650 nm band.

REFERENCES:
patent: 4220708 (1980-09-01), Heller

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