Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula ?where n is an integer between 2 and 6, inclusive; R1 and R2 are, independently, H, halogen, carboxyl, hydroxyl, thiol, cyano, nitro, aldehyde group, ketone group, an ether group, an ester group, a carbonyl group, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups can be optionally replaced by O, S, C?O, O?S?O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR3 group, a CHR4 group, or a CR5R6 group where R3, R4, R5, and R6 are, independently, H, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; Y comprises a bond, C, N, O, S, a branched or linear —(CH2)p— gr

Abstract: This invention includes an organophotoreceptor having an electrically conductive substrate and photoconductive element on the electrically conductive substrate, the photoconductive element having a) a polymeric charge transport composition with the formula where Y1 and Y2 are, each independently, a bond, a —CR1?N—NR2— group, or a —CR3?N—N?CR4— group; R, R?, R?, R1, R2, R3, and R4 comprise, each independently, H, an alkyl group, an alkenyl group, a heterocyclic group, an aromatic group, or a part of a ring group; X1 and X2 are, each independently, a linking group; T2 comprises a thiiranyl group, H, an alkyl group, an alkenyl group, or an aromatic group; Ar comprises an aromatic group; Z is a bridging group; and n is a distribution of integers between 1 and 100,000 with an average value at least 2; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging processes are also described.

Abstract: This invention relates to a novel organophotoreceptor that includes a photoconductive layer having a) a novel charge transport compound having the formula ?where R1 is a carbazole group, a julolidine group, or a p-(N,N-disubstituted)arylamine, R2, R3, R4, R5 and R6 are, independently, an alkyl group or an aryl group, R7 and R8 are, independently, hydrogen, an alkyl group, or an aryl group, X is oxygen, sulfur, or a NR? group where R? is hydrogen, an alkyl, or an aryl group, and Y is a trivalent aryl group; (b) a charge generating compound; and wherein the at least one photoconductive layer is carried on an electrically conductive substrate.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula ?where n is an integer between 2 and 6, inclusive; R1 and R2 are, independently, H, halogen, carboxyl, hydroxyl, thiol, cyano, nitro, aldehyde group, ketone group, an ether group, an ester group, a carbonyl group, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups can be optionally replaced by O, S, C?O, O?S?O, urethane, urea, an ester group, a NR3 group, a CHR4 group, or a CR5R6 group where R3, R4, R5, and R6 are, independently, H, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; Y comprises a bond, C, N, O, S, a branched or linear —(CH2)p— group where p is an integer between 0 and 1

Abstract: A liquid ink for developing electrophotography images comprises: a) a carrier liquid having a Kauri-Butanol number less than 30; b) a grafted co-polymer comprising a (co)polymeric steric stabilizer covalently bonded to a thermoplastic (co)polymeric core that is insoluble in the carrier liquid, wherein the grafted co-polymer is derived from at least a polymerizable organic compound having at least one acid group or at least one acid group; c) a dispersant having, respectively, at least an amine group or at least one acid group to form an acid-base copolymer-dispersant system or a base-acid copolymer-dispersant system, wherein the mole ratio of the amine group to the acid group is between 0.3 and 1.5 in the base-acid copolymer-dispersant system and the mole ratio of the acid group to the base group in the acid-base copolymer dispersant system is between 0.3 and 1.

Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport material comprising a fluorenone hydrazone having a) at least two fluorenone alkylsulfonylphenylhydrazone groups, b) at least two fluorenone pyrrolylhydrazone groups, c) at least two fluorenone benzotriazolylhydrazone groups, d) at least two fluorenone sulfolanylhydrazone groups, e) at least two fluorenone pyrazolylhydrazone groups, f) at least two fluorenone naphthylhydrazone groups, g) at least two fluorenone tetrazolylhydrazone groups, h) at least two fluorenone stilbenylhydrazone groups, or i) at least two fluorenone (9H-fluoren-9-ylidene)benzylhydrazone groups. Some of these fluoreneones may be represented by the formula where n is an integer between 2 and 6, inclusive; R1 is hydrogen, an alkyl group, or an aryl group; R2 is an alkylsulfonylphenyl or one of its derivatives; X is a linking group.

Abstract: Charge transport compounds are described that have a multiple number of hydrazone-bridged (N,N-disubstituted)arylamine groups connected by a central bridging group. Examples of charge transport compounds of this invention are those having the following generic formula: (R-Q)n-Y where R is an (N,N-disubstituted)arylamine group; Q comprises an aromatic hydrazone linking group; Y comprises a bridging group between R-Q- groups; and n is an integer between 2 and 6. An organic photoreceptor includes (a) that compound and (b) a charge generating compound; and (c) an electrically conductive substrate.

Abstract: A photoreceptor with good mechanical and physical properties is provided with an overcoat layer comprising a copolymer of an ?,?-ethylenically unsaturated carboxylic acid and an ?,?-ethylenically unsaturated monomer wherein the weight percent of the ?,?-ethylenically unsaturated carboxylic-acid is at least 25% up to 99% of the copolymer. The copolymer may comprise an ?,?-ethylenically unsaturated carboxylic acid and an ?,?-ethylenically unsaturated monomer wherein the copolymer has an acid value of at least 150 mg KOH/g the copolymer. The copolymer may be present in a blend with a second polymer or copolymer comprised of units derived from a second ?,?-ethylenically unsaturated monomer that is different from the an ?,?-ethylenically unsaturated carboxylic acid and/or the ?,?-ethylenically unsaturated monomer.

Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula where the average n is between 1 and 1000; R1, R2, R3, and R4 are, independently, hydrogen, a branched or linear alkyl group (e.g., a C1-C30 alkyl group), a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group (e.g. a cyclohexyl group), or an aryl group (e.g., a phenyl or naphthyl group); X is a divalent carbazole group or a divalent biscarbazole alkane group; Y is a divalent sulfonyldiphenylene group; Z is C(R4)—X—C(R3)?O double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N; and Q is O or N—N(R1)—Y—N(R2)—NH2; (b) a charge generating compound; and (c) an electrically conductive substrate over which the charge transport composition and the charge generating compound are located.

Abstract: Improved organophotoreceptors have: (a) a charge transport compound having the formula where R1 and R2 are, independently, an (N,N-disubstituted) arylamine group, such as a julolidine group, a triphenyl amine group, or an N-substituted carbazole group; R3 and R4 are, independently, an alkylsulfonylphenyl group; and X is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups is optionally replaced by an oxygen atom, a carbonyl group, urethane, urea, an ester group, a —NR5 group, a CHR6 group, or a CR7R8 group where R5, R6, R7, and R8 are, independently, H, an alkyl group, or aryl group; (b) a charge generating compound; and (c) an electrically conductive substrate over which the charge transport compound and the charge generating compound are located.

Abstract: Improved organophotoreceptors have: (a) a charge transport compound having the formula: where R1 is hydrogen, a branched or linear alkyl group, a branched or linear unsaturated hydrocarbon group, an ether group, or an aryl group; and R2 and R3 independently have a structure of: in which Ar is selected form the group consisting of; R4 is a hydrogen, or an aromatic group; (b) a charge generating compound; and (c) an electrically conductive substrate.

Abstract: Improved organophotoreceptor include: (a) a charge transport compound having the formula where R1 has a structure of: in which Ar is selected form the group consisting of; R4 is a hydrogen or an aromatic group and R2 and R3 are, independently, an (N,N-disubstituted) arylamine group; (b) a charge generating compound; and (c) an electrically conductive substrate. Additional improved charge transport compounds have the formula where R1 has a structure of and R2 is a julolidene group or a carbazole group.

Abstract: This invention includes an improved organophotoreceptor having an electrically conductive substrate and a photoconductive element on the electrically conductive substrate where the photoconductive element comprises:

Abstract: A crystalline phase of titanyl oxyphthalocyanine, referred to herein as the S-phase, has an internal blend of lattice arrangements is provided by treatment of the gamma-form of titanyl oxyphthalocyanine. The S-phase is a truly new phase, and not a mixture of particles of various phases (e.g., combinations of the beta-phase and the gamma-phase), with internal lattice distributions of atoms and molecules forming a new, non-continuous, non-uniform lattice structure. The x-ray spectrum shows a blend of diffraction peaks, having peaks that have previously been distinctly present only collectively among various crystalline forms of titanyl oxyphthalocyanine, but can now be provided in a single crystalline form. The visible spectra show significant absorption differences. The novel S-form titanyl oxyphthalocyanine is also used in a photoconductor displaying major peaks of Bragg's 2 theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5±0.2 degrees, 9.7±0.

Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula where the average n is between 1 and 1000; R1 and R2 are, independently, hydrogen, a branched or linear alkyl group (e.g., a C1-C30 alkyl group), a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group (e.g. a cyclohexyl group), or an aryl group (e.g., a phenyl or naphthyl group); X is a bis(fluorene-4-carboxyl)alkane group; Y is a divalent sulfonyldiphenylene group; Z is X═O where X is double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N; and Q is O or N—N(R1)—Y—N(R2)—NH2; (b) a charge generating compound; and (c) an electrically conductive substrate over which said charge transport composition and said charge generating compound are located.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:

Abstract: This invention relates to a liquid ink for developing electrophotographic images comprising: a) a carrier liquid having a Kauri-Butanol number less than 30; b) a plastisol; c) a dispersant; and d) a charge director wherein: a. for a positive charge director, the dispersant has amine groups and the plastisol comprises polymeric particles having acid groups and an acid value between 30 and 150 mg KOH/g such that the mole ratio of the amine groups to the acid groups is between 0.075 and 0.3; and b. for a negative charge director, the plastisol comprises a polymer having an amine value between 5 and 200 mg KOH/g and the dispersant has acid groups such that the mole ratio of the acid groups to the amine groups is between 0.075 and 0.3.

Abstract: This invention relates to a novel organophotoreceptor that includes:

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:

Abstract: This invention relates to a novel organophotoreceptor that comprises an electrically conductive substrate and photoconductive element on the electrically conductive substrate, the photoconductive element having