Electrophotographic photoconductor
First Claim
1. An electrophotographic photoconductor which is a positive charging, single layer type organic photoconductor, comprising:
- a conductive substrate; and
a photosensitive layer which is provided on the conductive substrate, which is a positive charging, single layer type, and which is comprised of;
at least one charge generation substance that contains a phthalocyanine pigment;
a positive hole transport substance;
an electron transport substance; and
a binder that contains a polycarbonate resin with a polydialkylsiloxane constructed of a repeated unit represented by formula (1) as follows;
whereinR is one of (a) an alkyl group having 1 to 6 carbon atoms which may be the same as or different from each other, or (b) an aromatic hydrocarbon group having 6 to 12 carbon atoms which is substituted or unsubstituted, B is (CH2)x with x being an integer ranging from 1 to 6, n is an integer ranging from 0 to 200, and m is an integer ranging from 1 to 50.
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Abstract
An electrophotographic photoconductor which is a positive charging, single layer type organic photoconductor including a conductive substrate; and a photosensitive layer which is provided on the conductive substrate, which is a positive charging, single layer type organic photoconductor, and which is composed of at least one charge generation substance that contains a phthalocyanine pigment; a positive hole transport substance; an electron transport substance; and a binder that contains a polycarbonate resin with a polydialkylsilozane constructed of a repeated unit represented by formula (1). Toner consumption during repeated electrophotographic use is reduced and print defects including dirty background suppressed.
12 Citations
7 Claims
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1. An electrophotographic photoconductor which is a positive charging, single layer type organic photoconductor, comprising:
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a conductive substrate; and
a photosensitive layer which is provided on the conductive substrate, which is a positive charging, single layer type, and which is comprised of;
at least one charge generation substance that contains a phthalocyanine pigment;
a positive hole transport substance;
an electron transport substance; and
a binder that contains a polycarbonate resin with a polydialkylsiloxane constructed of a repeated unit represented by formula (1) as follows;
wherein R is one of (a) an alkyl group having 1 to 6 carbon atoms which may be the same as or different from each other, or (b) an aromatic hydrocarbon group having 6 to 12 carbon atoms which is substituted or unsubstituted, B is (CH2)x with x being an integer ranging from 1 to 6, n is an integer ranging from 0 to 200, and m is an integer ranging from 1 to 50. - View Dependent Claims (2, 3, 4, 5, 6, 7)
providing an electrophotographic photoconductor according to claim 1; and
repeatedly producing an electrophotographic image on the electrophotographic photoconductor employing positive charging, wherein the toner comsumption after producing 10,000 prints is reduced compared to single layer, positive charging organic photoconductor which do not comprise the photosensitive layer according to claim 1.
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7. A method for suppressing print defects including dirty background during repeated electrophotographic use of a single layer, positive charging organic photoconductor, the method comprising the steps of:
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providing an electrophotographic photoconductor according to claim 1; and
repeatedly producing an electrophotographic image on the electrophotographic photoconductor employing positive charging, wherein the print defects including dirty background after producing 10,000 prints are reduced compared to single layer, positive charging organic photoconductor which do not comprise the photosensitive layer according to claim 1.
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Specification