Compositions – Electrically conductive or emissive compositions – Light sensitive
Patent
1990-08-30
1992-04-21
Shah, Mukund
Compositions
Electrically conductive or emissive compositions
Light sensitive
540140, 540141, 430 76, 430 78, H01C 1302, G03G 506
Patent
active
051065363
ABSTRACT:
A stable .alpha.-type titanyl phthalocyanine composition including an .alpha.-type titanyl phthalocyanine and a metal-free phthalocyanine is disclosed having a wide range of absorption wavelengths and high in spectral sensitivity. The method for making the phthalocyanine composition is carried out by pigmenting a concentrated sulfuric acid solution containing at least titanyl phthalocyanine by an acid paste process. The concentrated sulfuric acid solution is poured into water to produce an .alpha.-type titanyl phthalocyanine composition which is stable to withstand the impact of aging. Also disclosed is an electrophotographic sensitive material which includes a sensitive layer having the .alpha.-type titanyl phthalocyanine composition superposed on an electroconductive substrate. This electrophotographic sensitive material excels in its charging property and its dark attenuation property and exhibits high sensitivity and low residual potential. The electrophotographic sensitive material having a sensitive layer comprising the .alpha.-type titanyl phthalocyanine composition and an electric charge transferring material can also be superposed on an electroconductive substrate. This electrophotographic photosensitive material exhibits an oxidation potential in the ranage of 0.45 to 0.65 eV, enjoys high sensitivity, and shows low residual potential.
REFERENCES:
patent: 3252991 (1966-05-01), Schmidt et al.
patent: 3816118 (1974-06-01), Byrne
patent: 4106935 (1978-08-01), Petruzzella
patent: 4664997 (1987-05-01), Suzuki et al.
patent: 4971877 (1990-11-01), Miyamoto et al.
European Search Report, The Hague, Apr. 25, 1990.
Maeda Tatsuo
Miyamoto Eiichi
Mutou Nariaki
Nakazawa Tooru
Gupta Y. N.
Mita Industrial Co. Ltd.
Shah Mukund
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