Alpha-type titanyl phthalocyanine composition, method for production thereof, and electrophotographic sensitive material using same
申请人:MITA INDUSTRIAL CO. LTD.
公开号:EP0314100A2
公开(公告)日:1989-05-03
The first aspect of this invention resides in providing an α-type titanyl phthalocyanine composition comprising an α-type titanyl phthalocyanine and metal-free phthalocyanine. This α-type titanyl phthalocyanine composition is stable, wide in range of absorption wavelengths, and high in spectral sensitivity because it contains an α-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 α-type titanyl phthalocyanine composition comprising an α-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 α-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 α-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 α-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.
本发明的第一个方面是提供一种由α型钛酞菁和无金属酞菁组成的α型钛酞菁组合物。这种 α 型钛酞菁组合物稳定,吸收波长范围宽,光谱灵敏度高,因为它含有 α 型钛酞菁和无金属酞菁。
本发明的第二个方面是提供一种生产由 α 型钛酞菁和无金属酞菁组成的 α 型钛酞菁组合物的方法,该方法包括通过酸浆工艺将至少含有钛酞菁的浓硫酸溶液颜料化,酸浆工艺包括将所述浓硫酸溶液倒入水中。通过这种方法,可以很容易地生产出稳定的 α 型钛酞菁组合物,以抵御老化的影响。
本发明的第三个方面是提供一种电致发光感光材料,它在导电基底上叠加了由 α 型钛酞菁和无金属酞菁组成的感光层。这种电致发光感光材料具有优异的充电性能和暗衰减性能,并表现出高灵敏度和无残留电位。
本发明的第四个方面是提供一种电致发光感光材料,该材料在导电基底上叠加有感光层,感光层由 α 型钛酞菁成分和电荷转移材料组成,电荷转移材料的氧化电位在 0.45 至 0.65 eV 之间。这种电致发光感光材料灵敏度高,残留电位低。