Photochromic composition resistant to fatigue including...

Details Photochromic composition resistant to fatigue including... Photochromic composition resistant to fatigue including...

G - Physics

02

B

31/163

G02B 1/04 (2006.01) G03C 1/685 (2006.01) G03C 1/73 (2006.01)

Patent

CA 1181978

PHOTOCHROMIC COMPOSITION RESISTANT TO FATIGUE ABSTRACT The organic photochromic composition of this invention comprises spiro [indoline-2,3'-[3H]-naphth [2,1-b] [1,4] oxazine] (SO) dye and an unconventional ultraviolet stabilizer. The ultraviolet stabilizer improves the light fatigue resistance of the SO dye and will not hinder the photocolorability of the pho- tochromic composition. -1-

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