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Primary Examiner: Louie, Jr., Won H.
Assistant Examiner:
Attorney: Cooper, Dunham, Clark, Griffin & Moran

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Title: Photochromic method involving an aromatic amine

Abstract: Photochromic method utilizing photochromic compositions in which the intensity of color generation is not proportional to light intensity which are produced by incorporating an aromatic amine with a low ionization potential, up to 7.6 EV so that it can be ionized by biphotonic absorption into a stabilizing polymer matrix.

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Inventors: Ozaki, Masaru (Fuji, JP)
Mori, Koichi (Fuji, JP)
Yoshino, Masatsugu (Fuji, JP)

Application Number: 034279
Filing Date: 1979-04-30
Publication_date: 1980-06-03
Assignee: Asahi Kasei K. K. (JP)
Primary Class(es): 430/340 359/241, 359/242, 428/919, 430/444, 430/944, 430/945
Other Classes:
US Patent Ref:

2410644	Nov, 1946	Fierke et al.	96/95.
3227550	Jan, 1966	Whitmore et al.	96/3.
3322542	May, 1967	Ullman et al.	96/90.
3635544	Jan, 1972	Stamm et al.	96/90.
3767393	Oct, 1973	Fox	96/1.
3825427	Jul, 1974	Inoue et al.	96/90.

Other Refs: Other References: Gailite et al., Zh. Vses Khim Obshchest, May, 1973, 18(2), 237-238.
Myer, J. Phys. Chem., May, 1970, 74(10), 2122-2126.
Chem. Abs., vol. 74, 1971, 54881j.
Chem. Abs., vol. 66, 1967, 120822d.
Cadogan et al., The Journal of Physical Chemistry, vol. 72, No. 3, Mar., 1968, 929-944.
Meyer, The Journal of Physical Chemistry, vol. 74, No. 10, May, 1970, 2118-2121.