Eastman-kodak Company

Thomas R Klose

Khe C Nguyen

Michael T Regan

Louis J Rossi

Frank G Webster

Yann Hung

An electrophographic recording element comprising a combination of photoconductive titanyl phthalocyanine and titanyl fluorophthalocyanine pigments. The pigments or charge-generation materials are dispersed in a binder to form a layer having excellent photosensitivity and resistance to abrasion.

Electrophotographic recording elements containing a combination of

An electrophotographic recording element having a layer formed from a liquid composition comprising polymeric binder and dispersed photoconductive titanyl phthalocyanine particles. The titanyl phthalocyanine particles have a particle size up to about 0.2 micrometer and are characterized by certain X-ray diffraction characteristics and the layers are characterized by certain spectral absorption ranges. The coating composition comprises finely-divided photoconductive titanyl phthalocyanine particles dispersed in a solvent solution of polymeric binder and is prepared by the steps of (1) milling a titanyl phthalocyanine pigment with milling media comprising inorganic salt and non-conducting particles under shear conditions in the substantial absence of the solvent to provide pigment having a particle size up to 0.2 micrometer, (2) continuing the milling at higher shear at a temperature up to about 50.degree. C. to achieve a perceptible color change of the pigment particles, (3) rapidly increasing the temperature of the milled pigment by at least 10.degree. C., (4) separating the milled pigment from the milling media and (5) mixing the milled pigment with the solvent solution of polymeric binder to form the coating composition.

Electrophotographic recording elements containing titanyl phthalocyanine

Near infrared sensitive photoconductive elements are made from fluorine-substituted titanylphthalocyanine pigments which can be dispersion coated.

Photoconductive phthalocyanine pigments, electrophotographic elements

Electrically photosensitive materials and elements comprising an electrically photosensitive compound of the structure: ##STR1## wherein: n represents zero, 1 or 2;

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Fairport, NY, United States of America

Thomas R Klose