| abstract |
An electrophotographic photoreceptor comprising a support having thereon at least one photoconductive layer containing at least inorganic photoconductive particles and a binder resin, wherein said binder resin has a weight average molecular weight of from 1 x 10³ to 5 x 10⁴ and comprises (A) at least one resin comprising, as a polymerization component, (a-i) not less than 30% by weight of at least one repeating unit represented by formula (I) or (II):n wherein X₁ and X₂, which may be the same or different, each represents a hydrogen atom, a hydrocarbon group having from 1 to 10 carbon atoms, a chlorine atom, a bromine atom, -COY₁ or -COOY₂, wherein Y₁ and Y₂ each represents a hydrocarbon group having from 1 to 10 carbon atoms, provided that both X₁ and X₂ do not simultaneously represent a hydrogen atom; and W₁ and W₂ each represents a bond or a linking group containing from 1 to 4 linking atoms which connects -COO- and the benzene ring, with at least one acidic group selected from n(i) -PO₃H₂, (ii) -SO₃H, (iii) -COOH,n wherein R represents a hydrocarbon group having from 1 to 10 carbon atoms or -OR′, wherein R′ represents a hydrocarbcn group having from 1 to 10 carbon atoms, and (v) a cyclic acid anhydride-containing group, being bonded to only one of the terminals of the polymer main chain thereof. The photoreceptor exhibits excellent electrostatic characteristics, image formation performance as well as printing suitability irrespective of variations in environmental conditions or the kind of sensitizing dyes used in combination with the photoreceptor. |