Method for producing electrophotographic photosensitive member
First Claim
Patent Images
1. A method for producing an electrophotographic photosensitive member comprising a support, a charge generating layer formed on the support, and a charge transporting layer formed on the charge generating layer, the method comprising:
- dissolving (α
) and (β
) with solvents of (γ
) and (δ
) to prepare a charge-transporting-layer coating liquid;
the (α
) being a charge transporting substance,the (β
) being at least one resin selected from the group consisting ofa polycarbonate resin having a structural unit represented by the following formula (1A), anda polyester resin having a structural unit represented by the following formula (1B),the (γ
) being an aromatic hydrocarbon solvent which is at least one selected from the group consisting of toluene, xylene and mesitylene, andthe (δ
) being a compound having a boiling point under 1 atmosphere higher than that of the (γ
),forming a coat for the charge transporting layer using the charge-transporting-layer coating liquid, anddrying the coat to form the charge transporting layer,whereinthe charge transporting layer is a surface layer,the charge-transporting-layer coating liquid is free of any polyester resins having a siloxane structure at the end thereof and any polycarbonate resins having a siloxane structure at the end thereof; and
the (α
), the (γ
) and the (δ
) satisfy the following expression;
X(g)>
Y(g)wherein,X(g) represents the solubility of the (α
) in 100 g of the (γ
) in an environment at 23°
C. under 1 atmosphere, andY(g) represents the solubility of the (α
) in 100 g of the (δ
) in an environment at 23°
C. under 1 atmosphere;
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Abstract
A method for producing an electrophotographic photosensitive member having a charge transporting layer, the charge transporting layer being a surface layer, the method including drying a coat of a charge-transporting-layer coating liquid to form the charge transporting layer, wherein the charge-transporting-layer coating liquid contains components (α), (β), (γ) and (δ), and when the solubility of the component (α) in 100 g of the component (γ) is defined as X(g) and the solubility of the component (α) in 100 g of the component (δ) is defined as Y(g), solubility X and solubility Y satisfy a relationship of X>Y.
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Citations
8 Claims
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1. A method for producing an electrophotographic photosensitive member comprising a support, a charge generating layer formed on the support, and a charge transporting layer formed on the charge generating layer, the method comprising:
-
dissolving (α
) and (β
) with solvents of (γ
) and (δ
) to prepare a charge-transporting-layer coating liquid;the (α
) being a charge transporting substance,the (β
) being at least one resin selected from the group consisting ofa polycarbonate resin having a structural unit represented by the following formula (1A), and a polyester resin having a structural unit represented by the following formula (1B), the (γ
) being an aromatic hydrocarbon solvent which is at least one selected from the group consisting of toluene, xylene and mesitylene, andthe (δ
) being a compound having a boiling point under 1 atmosphere higher than that of the (γ
),forming a coat for the charge transporting layer using the charge-transporting-layer coating liquid, and drying the coat to form the charge transporting layer, wherein the charge transporting layer is a surface layer, the charge-transporting-layer coating liquid is free of any polyester resins having a siloxane structure at the end thereof and any polycarbonate resins having a siloxane structure at the end thereof; and the (α
), the (γ
) and the (δ
) satisfy the following expression;
X(g)>
Y(g)wherein, X(g) represents the solubility of the (α
) in 100 g of the (γ
) in an environment at 23°
C. under 1 atmosphere, andY(g) represents the solubility of the (α
) in 100 g of the (δ
) in an environment at 23°
C. under 1 atmosphere; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification
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Current AssigneeCanon Ayutthaya Limited (Canon Inc.)
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Original AssigneeCanon Ayutthaya Limited (Canon Inc.)
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InventorsMiura, Daisuke, Tanaka, Daisuke, Sugiyama, Kazumichi
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Primary Examiner(s)VAJDA, PETER L
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Application NumberUS14/160,445Publication NumberTime in Patent Office805 DaysField of SearchUS Class Current1/1CPC Class CodesG03G 5/047 characterised by the charge...G03G 5/0514 not comprising cyclic groupsG03G 5/0517 comprising one or more cycl...G03G 5/0525 Coating methodsG03G 5/056 PolyestersG03G 5/0564 Polycarbonates
