The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 1996
Filed:
Apr. 11, 1995
Chen-Jen Yang, Hsinchuang, TW;
Tsong-Shin Jean, Hsinchu, TW;
Lung-Tarn Wu, Ping Tung Hsien, TW;
Ching-Liang Yang, Hsinchu, TW;
Kuei-Fei Teng, Kaohsiung, TW;
Sinonar Corp., Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu Hsien, TW;
Abstract
An ammonia-modified titanyl phthalocyanine for use in preparing charge generating layer of a photoreceptor is disclosed. The ammonia-modified titanyl phthalocyanine is obtained by a process comprising the following steps: (a) reacting titanium tetrachloride with halogen-containing naphthalene to obtain an unmodified titanyl phthalocyanine; (b) dispersing the unmodified titanyl phthalocyanine in an organic solvent; and (c) subjecting the unmodified titanyl phthalocyanine to an ammonia-induced complexation-mediated crystal transformation so as to obtain the ammonia-modified titanyl phthalocyanine. The ammonia-induced complexation-mediated crystal transformation step can be achieved by either bubbling ammonia gas through the titanyl phthalocyanine-containing organic solution or by adding an ammonia-saturated aqueous solution to the titanyl phthalocyanine-containing organic solution. The ammonia-modified titanyl phthalocyanine is characterized by having Bragg diffraction angles of 7.5, 9.3, 13.6, 14.3, 17.9, 24.0, 27.2, and 29.1 degrees, and vibrational absorption resonances at 1492 cm.sup.-1, 1416 cm.sup.-1, 1333 cm.sup.-1, 1120 cm.sup.-1, 1072 cm.sup.-1, 962 cm.sup.-1, 894 cm.sup.-1, 752 cm.sup.-1, and 731 cm.sup.-1. The photoreceptor shows excellent spectral sensitivity at wavelengths in the near-infrared range (750-825 nm), and excellent cyclic stability evidenced by the observed negligible changes in the dark development potential after prolonged exposure cycles.