Oxytitanium phthalocyanine, process for producing same and electrophotographic photosensitive member using same
US5593805A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1992 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Apr 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0696
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A new crystalline form of oxytitanium phthalocyanine is characterized by main peaks specified by Bragg angles (2.theta..+-.0.2 degrees) of 7.4 degrees, 10.2 degrees, 12.5 degrees, 15.0 degrees. 16.3 degrees, 18.3 degrees, 22.4 degrees, 24.2 degrees, 25.2 degrees and 28.5 degrees in X-ray diffraction pattern based on CuK.alpha. characteristic X-rays. The oxytitanium phthalocyanine is formed by treating amorphous oxytitanium phthalocyanine with a solvent selected from the group consisting of monohydric alcohols having at least two carbon atoms, cellosolves, diethylene glycol monoethers and diacetone alcohol. The oxytitanium phthalocyanine is useful as a charge generating material for providing an electrophotographic photosensitive member, which shows a stably high sensitivity to long wavelength light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.