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US 4,735,882 AGranted
Trisazo photsensitive member for electrophotography
AssigneeCanon Kabushiki Kaisha
InventorsMasataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
Life of this patent
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Abstract
An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the following general formulae (1) to (5): ##STR1## wherein groups Ar are arylene groups and divalent heterocyclic groups, each of which may contain a substituent; n is 0 or 1; and group A is a coupler residue group having a phenolic OH group.
Claims4
An electrophotographic photosensitive member comprising a photosensitive layer containing an azo pigment selected from the group consisting of the following general formulae (1) to (5):
- ##STR1600## wherein groups Ar are each arylene groups or divalent heterocyclic groups, each of which may contain a substituent;
- n is 0 or 1;
- and group A is a coupler residue group having a phenolic group;
- wherein at least one of the three groups Ar combined with the amine ##STR1601## in the general formula (1) and (3) is a group selected from the group consisting of biphenylene, naphthylene or anthrylene, each of which may have a substituent and a binder.
1 more element
Dependencies are inferred from the claim text.