0314100-A2 is referenced by 30 patents and cites 5 patents.

The first aspect of this invention resides in providing an alpha -type titanyl phthalocyanine composition comprising an alpha -type titanyl phthalocyanine and metal-free phthalocyanine. This alpha -type titanyl phthalocyanine composition is stable, wide in range of absorption wavelengths, and high in spectral sensitivity because it contains an alpha -type titanyl phthalocyanine in combination with metal-free phthalocyanine. The second aspect of this invention resides in providing a method for the production of an alpha -type titanyl phthalocyanine composition comprising an alpha -type titanyl phthalocyanine and a metal-free phthalocyanine, which method comprises pigmenting a concentrated sulfuric acid solution containing at least titanyl phthalocyanine by the acid paste process consisting in pouring said concentrated sulfuric acid solution into water.; By this method, an alpha -type titanyl phthalocyanine composition stable to withstand the impact of aging can be easily produced. The third aspect of this invention resides in providing an electrophotographic sensitive material having superposed on an electroconductive substrate a sensitive layer comprising an alpha -type titanyl phthalocyanine and a metal-free phthalocyanine. This electro photographic sensitive material excels in charging property and dark attenuation property and exhibits high sensitivity and sparing residual potential. The fourth aspect of this invention resides in providing an electrophotographic sensitive material having superposed on an electroconductive substrate a sensitive layer comprising an alpha -type titanyl phthalocyanine composition and an electric charge transferring material exhibiting oxidation potential in the range of 0.45 to 0.65 eV.; This electrophotographic sensitive material enjoys high sensitivity and shows sparing residual potential.

Title
Alpha-type titanyl phthalocyanine composition, method for production thereof, and electrophotographic sensitive material using same.
Application Number
EP19880117838 19881026
Publication Number
0314100 (A2)
Application Date
October 26, 1988
Publication Date
May 3, 1989
Inventor
Maeda Tatsuo
Nakazawa Tooru
Mutou Nariaki
Miyamoto Eiichi
Assignee
Mita Industrial
JP
IPC
G03G 05/06
C09B 69/00
C09B 67/50
C09B 67/22
C09B 67/16
C09B 47/04
G03G 05/06
C09B 67/00
C09B 47/04
G03G 05/06
C09B 67/54
C09B 67/50
C09B 67/22
C09B 67/16
C09B 47/04
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