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US 2004/0063017 A1Published application
Single layered electrophotographic photoreceptor
AssigneeSamsung Electronics Co., Ltd.
InventorsHwan koo Lee, Saburu Yokota, Kyung-yol Yon, Beouj-jun Kim, Hae-ree Joo, Nam-Jeong Lee
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Abstract
A single layered electrophotographic photoreceptor has a photoreceptor layer comprising polyester resin as a binder resin having biphenyl fluorene units in the main chain, and specific phenolic compounds as antioxidants. The electrophotographic photoreceptor according to the present invention enables obtaining a better image by suppressing a decrease in dark decay and charged electric potential due to repeated use and has an extended electrical lifetime.
Claims20
An electrophotographic photoreceptor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidant having the following chemical Formula (2):
- 14
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl,
- where, in Formula (2), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl and ethyl;
- and X3 is C1-C6 alkyl, and
- 15
- where a, c, k, I, and m, independently, are integers between 0 and 6, b is 0 or 1, X1, X2, Y1 and Y2 have the same meaning as above;
- and X4, X5, and X6 are independently selected from the group consisting of hydrogen and C1-C6 alkyl.
8 more elements
An electrophotographic photoreceptor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on said substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- 16
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4.
9 more elements
An electrophotographic drum, comprising:
- a drum;
- and
- an electrophotographic photoreceptor disposed thereon, the electrophotographic photoreceptor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- 25
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4,
- wherein the electrophotographic drum is attachable to/detachable from an image forming apparatus.
13 more elements
An electrophotographic drum, comprising:
- a drum;
- and
- an electrophotographic photoreceptor disposed thereon, the electrophotographic photoreceptor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- 26
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4,
- wherein the electrophotographic drum is attachable to/detachable from an image forming apparatus.
13 more elements
An electrophotographic cartridge, comprising:
- an electrophotographic photoreceptor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- Formula (1)
- 27
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1l-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4;
- and
- at least one of:
- a charging device that charges the electrophotographic photoreceptor;
- a developing unit which develops an electrostatic latent image formed on the electrophotographic photoreceptor;
- and
- a cleaning device which cleans a surface of the electrophotographic photoreceptor,
- wherein the electrophotographic cartridge is attachable to/detachable from an image forming apparatus.
18 more elements
An electrophotographic cartridge, comprising:
- an electrophotographic photoreceptor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- 28
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4;
- and
- at least one of:
- a charging device that charges the electrophotographic photoreceptor;
- a developing unit which develops an electrostatic latent image formed on the electrophotographic photoreceptor;
- and
- a cleaning device which cleans a surface of the electrophotographic photoreceptor,
- wherein the electrophotographic cartridge is attachable to/detachable from an image forming apparatus.
17 more elements
An image forming apparatus, comprising:
- a photoconductor unit having an electrophotographic photoreceptor, the electrophotograpohic photoconductor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- 29
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4;
- a charging device which charges the photoconductor unit;
- an imagewise light irradiating device which irradiates the charged photoconductor unit with imagewise light to form an electrostatic latent image on the photoconductor unit;
- a developing unit that develops the electrostatic latent image with a toner to form a toner image on the photoconductor unit;
- and
- a transfer device which transfers the toner image onto a receiving material,
15 more elements
An image forming apparatus, comprising:
- a photoconductor unit having an electrophotographic photoreceptor, the electrophotograpohic photoconductor comprising:
- a conductive substrate;
- and
- a photoreceptor layer formed on the substrate, wherein the photoreceptor layer comprises polyester resins as binder resin having biphenyl fluorene units of the following chemical Formula (1) in the main chain, and phenolic compounds as antioxidants having the following chemical Formula (3):
- 30
- where, in Formula (1), the hydrogens in the aromatic rings are optionally substituted with substituents selected from the group consisting of halogen, C1-C20 aliphatic hydrocarbon, and C5-C8 cycloalkyl;
- and
- where, in Formula (3), X1 and X2 are independently selected from the group consisting of hydrogen and C1-C6 alkyl;
- Y1 and Y2 are independently selected from the group consisting of hydrogen, methyl, and ethyl;
- a and c are integers between 0 and 6;
- b is 0 or 1;
- n is an integer between 2 and 4;
- Z is S or O when n is 2, N when n is 3, and C when n is 4;
- a charging device which charges the photoconductor unit;
- an imagewise light irradiating device which irradiates the charged photoconductor unit with imagewise light to form an electrostatic latent image on the photoconductor unit;
- a developing unit that develops the electrostatic latent image with a toner to form a toner image on the photoconductor unit;
- and
- a transfer device which transfers the toner image onto a receiving material,
15 more elements
Dependencies are inferred from the claim text.