Patent ID: 7968264
Filing Date: 2011-06-28
Classification: G03G

Abstract:
1. An electrophotographic photoreceptor comprising: a conductive substrate; and a photosensitive layer that comprises a phthalocyanine pigment, a charge-transporting substance and at least one kind of lignophenol derivative, wherein the at least one kind of lignophenol derivative is selected from the group consisting of the following (a) to (c): (a) a lignophenol derivative that is a phenol compound of lignin, which is obtained by solvating a lignin-containing material with a phenol compound, adding thereto an acid, and mixing them; (b) a lignophenol derivative that is a lignophenol second-order derivative, which is obtained by subjecting the lignophenol derivative of (a) to a reaction of introducing an acyl group, a carboxyl group, an amido group or a cross-linkable group or to a reaction of alkali treatment; and (c) a lignophenol derivative that is a lignophenol higher-order derivative, which is obtained by subjecting the lignophenol derivative of (a) to two or more reactions selected from the group consisting of a reaction of introducing an acyl group, a reaction of introducing a carboxyl group, a reaction of introducing an amido group, a reaction of introducing a cross-linkable group and a reaction of alkali treatment.