Abstract: An electrophotographic photoconductor comprising at least an electroconductive support and a photoconductive layer which is formed on said electroconductive support, the outermost layer of the photoconductor contains particles comprising a polyorganosiloxane-containing phase which contains polyorganosiloxane and an organic polymer-containing phase which contains organic polymer without silicon and has a polyorganosiloxane content which is less than the polyorganosiloxane-containing phase, each phase being exposed at the top surface of the photoconductor.

Abstract: A method of producing an aromatic polycarbonate resin includes the step of carrying out solution polymerization of a diphenol compound having a triarylamine structure with a diol compound of formula (I): wherein R1 and R2 are each independently a substituted or unsubstituted alkyl croup, a substituted or unsubstituted aryl group, or a halogen atom; a and b are each independently an integer of 0 to 4: and Y is —COO— or in which Z is a substituted or unsubstituted bivalent aliphatic group or a substituted or unsubstituted arylene group. In addition, an electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon containing as an effective component the above-mentioned aromatic polycarbonate resin prepared by the solution polymerization.

Abstract: An electrophotographic photoconductor having an electroconductive support, and a photoconductive layer formed thereon and containing an aromatic polycarbonate resin having a structural unit of formula (3) shown in the specification. The polycarbonate resin is produced from a diphenol compound of the formula (1) shown in the specification.

Abstract: An image bearing material including a matrix resin and, within the matrix resin, a core/shell graft copolymer including a core including one or more polymers and a shell including a graft polymer which has a linear chain connected with the core and which is formed from one or more monomers. The image bearing material is preferably used for a surface layer of an electrophotographic photoreceptor, an intermediate transfer medium, and the like image bearing members to improve the abrasion resistance thereof.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (2) and a structural unit with charge transporting properties, each of the structural units being contained in an amount of 5 wt. % or more of the total weight of the polycarbonate resin. There is disclosed an aromatic polycarbonate resin having a structural unit of formula (1) and the structural unit of formula (2), with the relationship between the composition ratios being 0<k/(k+j)<1 when the composition ratio of the structural unit (1) is k and that of the structural unit (2) is j, or an aromatic polycarbonate resin having a repeat unit of formula (3). The formulas (1) to (3) are specified in the specification.

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), two structural units of formulae (I) and (II), or a repeat unit of formula (III): wherein Ar1 to Ar7, Y, X, and n are as specified in the specification.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed thereon and contains an aromatic polycarbonate resin including at least a structural unit of formula (1): wherein a, b, c and d are each independently an integer of 0 to 4; n is an integer of 0 or 1; and R1, R2, R3 and R4 are each independently a halogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group, and R1, R2, R3 and R4 may each be the same or different when a, b, c and d are each an integer of 2, 3 or 4. Further, there are provided aromatic polycarbonate resins each including the structural unit of formula (1) and a structural unit with charge transporting properties.

Abstract: An image bearing material including a matrix resin and, within the matrix resin, a core/shell graft copolymer including a core including one or more polymers and a shell including a graft polymer which has a linear chain connected with the core and which is formed from one or more monomers. The image bearing material is preferably used for a surface layer of an electrophotographic photoreceptor, an intermediate transfer medium, and the like image bearing members to improve the abrasion resistance thereof.

Abstract: An electrophotographic photoconductor includes an electroconductive support and a photoconductive layer formed thereon which contains a compound having a charge generating moiety and a charge transporting moiety in the molecule thereof. As such a compound for use in the electrophotographic photoconductor, various compounds having a charge generating moiety derived from an azo compound and a charge transporting moiety derived from a triarylamine compound are proposed. Bisazo and trisazo compounds serving as such compounds are also proposed, together with intermediates for producing the bisazo and trisazo compounds.

Abstract: An electrophotographic photoconductor has an electroconductive support and a photoconductive layer formed thereon, a surface top portion of the photoconductor containing a high-molecular charge transport material including a polycarbonate copolymer synthesized from (a) a bisphenol monomer with an ionization potential of 6.0 eV or less, having a positive hole transporting function, and (b) a bisphenol monomer having a substituent at the o-position with respect to at least one hydroxyl group thereof, the substituent being bulkier than a fluorine atom. A process cartridge holds the above-mentioned photoconductor therein, and an electrophotographic image forming apparatus is provided with the above-mentioned photoconductor or process cartridge.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed on the support and contains as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), or the structural unit of formula (I) and a structural unit of formula (II): wherein Ar1 to Ar5, R1, and X are as specified in the specification.

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): wherein Ar1 to Ar3, X, n, k and j are as specified in the specification.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed thereon and contains an aromatic polycarbonate resin including at least a structural unit of formula (1): wherein a, b, c and d are each independently an integer of 0 to 4; n is an integer of 0 or 1; and R1, R2, R3 and R4 are each independently a halogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group, and R1, R2, R3 and R4 may each be the same or different when a, b, c and d are each an integer of 2, 3 or 4. Further, there are provided aromatic polycarbonate resins each including the structural unit of formula (1) and a structural unit with charge transporting properties.

Abstract: A method of producing an aromatic polycarbonate resin includes the step of carrying out solution polymerization of a diphenol compound having a triarylamine structure with a diol compound of formula (I): wherein R1 and R2 are each independently a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a halogen atom; a and b are each independently an integer of 0 to 4; and Y is —COO— or in which Z is a substituted or unsubstituted bivalent aliphatic group or a substituted or unsubstituted arylene group.

Abstract: An electrophotographic photoconductor includes an electroconductive support and a photoconductive layer formed thereon which contains a compound having a charge generating moiety and a charge transporting moiety in the molecule thereof. As such a compound for use in the electrophotographic photoconductor, various compounds having a charge generating moiety derived from an azo compound and a charge transporting moiety derived from a triarylamine compound are proposed. Bisazo and trisazo compounds serving as such compounds are also proposed, together with intermediates for producing the bisazo and trisazo compounds.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed thereon and contains as an effective component an aromatic polycarbonate resin having a structural unit of formula (1), two structural units of formula (1) and (2), or a repeat unit of formula (3): wherein R1 and R2, Ar1 to Ar8, X, Y, s and n are as specified in the specification. The above-mentioned aromatic polycarbonate resin is provided with charge transporting properties.

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), or in combination with a structural unit of formula (II); ##STR1## wherein R, R.sup.1, and X are as specified in the specification.

Abstract: An electrophotographic photoconductor includes an electroconductive support and a photoconductive layer formed thereon which contains a compound having a charge generating moiety and a charge transporting moiety in the molecule thereof. As such a compound for use in the electrophotographic photoconductor, various compounds having a charge generating moiety derived from an azo compound and a charge transporting moiety derived from a triarylamine compound are proposed. Bisazo and trisazo compounds serving as such compounds are also proposed, together with intermediates for producing the bisazo and trisazo compounds.

Abstract: An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon, which photoconductive layer includes a polycarbonate resin. Aromatic polycarbonate resins not only for the electrophotographic photoconductor, but also for the materials for liquid display panels, optical cards, optical discs, varieties of films having high transparency and heat resistance, deposited plastic reflecting mirrors, and lenses are disclosed.

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.