Disazo electrophotographic photosensitive member
AssigneeCanon Kabushiki Kaisha
InventorsKazuharu Katagiri, Katsunori Watanabe, Shozo Ishikawa, Makoto Kitahara
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Abstract
An electrophotographic photosensitive member is characterized by having a photosensitive layer containing at least one disazo pigment represented by the formula ##STR1## wherein Cp represents a coupler residue; B.sub.1, B.sub.2, B.sub.1 ', and B.sub.2 ' independently of one another represent atoms or groups selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A represents ##STR2## (D.sub.1 and D.sub.2 represent single bond between two ##STR3## or between two ##STR4##
Claims41
An electrophotographic photosensitive member characterized by having a conductive support, a charge transport layer and a charge generation layer which contains at least one disazo pigment of the formula:
- ##STR162## wherein Cp is a coupler residue;
- B.sub.1, B.sub.2, B'.sub.1, and B'.sub.2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl;
- and A is ##STR163## wherein D.sub.1 and D.sub.2 each is a single bond between two ##STR164## or between two ##STR165##
An electrophotographic photosensitive member characterized by having a photosensitive layer containing a binder, a hole-transporting material and at least one disazo pigment of the formula;
- ##STR175## wherein Cp is a coupler residue;
- B.sub.1, B.sub.2, B'.sub.1, and B'.sub.2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl;
- and A is ##STR176## wherein D.sub.1 and D.sub.2 each is a single bond between two ##STR177## or between two ##STR178##
An electrophotographic photosensitive member characterized by having a conductive support, a charge transport layer, and a charge generation layer which contains at least one disazo pigment represented by the formula:
- ##STR179## wherein Cp is a coupler residue;
- B.sub.1, B.sub.2, B'.sub.1, and B'.sub.2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl;
- and A is ##STR180##
An electrophotographic photosensitive member characterized by having a layer containing a hole-transporting material and at least one disazo pigment represented by the formula ##STR184## wherein Cp is a coupler residue;
- B.sub.1, B.sub.2, B'.sub.1, and B'.sub.2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl;
- and A is ##STR185##
Dependencies are inferred from the claim text.