JPH09281721A - Electrophotographic photoreceptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance abrasion resistance without deteriorating the merit of the electrophotographic organic photoreceptor by using a a combination of a specified naphthalene type polycarbonate copolymer as a binder resin with a specified antioxidant. SOLUTION: The binder resin of this organic photoreceptive layer contains the naphthalene type polycarbonate copolymer comprising repeating units represented by formulae I and II in a molar ratio of the repeating units of formula II to the sum of those of formulae I and II of 0.01<=[i-b]/ [i-a]+[i- b]}<=0.5, and at least one kind of phenolic antioxidant represented by formula III and in formulae I-III, Y is a -O-, -CO-, -S- atom or atomic group or the like; each of R<51> -R<54> is, independently, an H atom or the like; each of (a) and (b) in an integer of 0-4; each of (c) and (d) is an integer of 0-3; each of R1 -R3 is an H atom or the like; (n) is an integer of 1-3; and [i-a] and [i-b] are the total numbers of the repeating units of formula I and formula II, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photoconductor, and more particularly to an electrophotographic organic photoconductor having a photosensitive layer containing an organic material and used in an electrophotographic printer or a copying machine.

[0002]

2. Description of the Related Art An electrophotographic photoconductor has a structure in which a photoconductive photoconductor layer is laminated on a conductive substrate. An organic electrophotographic photoreceptor for electrophotography, which contains an organic compound as a functional component responsible for charge generation and transport, especially for laminated electrophotography in which functional layers such as a charge generation layer and a charge transport layer are laminated with high material selectivity. Organic photoconductors are easy to design functionally, have high productivity by a coating method, and are excellent in safety. Therefore, application to various printers such as copying machines is being actively researched.

Particularly in recent years, a photoreceptor using an organic material, which has advantages such as flexibility, thermal stability and film-forming property, has been put into practical use. Further, a new azo compound as a charge generating material and a new stilbene derivative as a charge transporting material have been developed to have high sensitivity and are used in a copying machine having a high copying speed.

[0004]

However, such a photoreceptor does not fully satisfy all the characteristics as a photoreceptor. Particularly in recent years, as the printing speed has increased, higher sensitivity and higher printing durability have been strongly demanded.

Among the above-mentioned problems, regarding the improvement of printing durability,
It is necessary to suppress the amount of film scraping and the deterioration of electrical characteristics due to printing durability. The amount of film abrasion due to printing durability is mainly determined by the resin binder used, and conventionally, bisphenol A type, C type, Z type polycarbonate resins and their copolymers have been used as resin binders, and improvements have been made. , I haven't got enough satisfaction yet.

On the other hand, the deterioration of electrical characteristics due to printing durability appears as problems such as a decrease in charging potential, an increase in residual potential, and a decrease in sensitivity. Some of these causes can be external factors. That is, it is exposed to ozone due to electrostatic discharge, exposed to light during exposure and static elimination processes, and exposed to strong external light during maintenance. With the progress of material development of charge generation materials and charge transport materials that are not deteriorated by these external factors, antioxidants for suppressing deterioration have been developed. However, at present, no technology has been established that can satisfy all required performances.

Therefore, an object of the present invention is to realize high printing durability while maintaining the advantages of the organic photoconductor for electrophotography.

[0008]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that by using a specific naphthalene-based copolycarbonate as a resin binder, a specific antioxidant is used in combination. The inventors have found that abrasion resistance (printing durability) can be improved without deteriorating electrical characteristics, and have completed the present invention. That is, the present invention has the following configurations, respectively.

(1) In an organic photoconductor for electrophotography having a photosensitive layer on a conductive substrate, the following structural formulas [ia] and [ib] are used as resin binders in the photosensitive layer. (In the formula, Y is-, -O-, -CO-, -S-, -SO ₂
—, —CR ⁵⁵ R ⁵⁶ — (wherein R ⁵⁵ and R ⁵⁶ are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms).
Or a 1,1-cycloalkylidene group having 5 to 7 carbon atoms, wherein R ⁵¹ , R ⁵² , R ^53, and R ⁵⁴ are each independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or 5 carbon atoms. To 7 cycloalkyl groups or 6 to 6 carbon atoms
12 represents a substituted or unsubstituted aryl group, a and b are each independently an integer of 0 to 4, and c and d are each independently an integer of 0 to 3. ), The content of the repeating unit represented by the general formula [ib] is the same as that of the repeating unit represented by the general formula [ia] and the repeating unit represented by the general formula [ib]. It contains a naphthalene-based copolycarbonate in a range represented by the following formula in a molar ratio to the total, 0.01 ≦ [ib] / {[ia] + [ib]} ≦ 0.5, and also as an antioxidant. The following general formula [l-
a], (In the formula, R ¹ , R ² and R ³ represent a hydrogen atom, a halogen atom, a hydroxyl group, or an optionally substituted alkyl group, an aryl group, an alkenyl group, an aralkyl group, an alkoxy group, an acyl group or a heterocyclic group. Where n is 1 to 3
Is an integer). At least one phenol compound represented by the formula (1) is contained in the electrophotographic photoreceptor.

(2) In the electrophotographic photoreceptor of (1) above, the following general formula [l-
b], (In the formula, R ⁴ , R ⁵ , R ⁶ , R ⁷ and R ⁸ represent a hydrogen atom or an optionally substituted alkyl group, alkenyl group or aryl group.) Electron containing at least one compound It is a photoconductor for photography.

(3) In the electrophotographic photoreceptor of (1) above, the following general formula [l-
c], (In the formula, R ⁹ and R ¹⁰ are a hydrogen atom or an optionally substituted alkyl group, alkenyl group, aryl group, R ¹¹
Represents a direct bond or an oxygen atom. ) An electrophotographic photoreceptor containing at least one compound represented by the formula (1).

(4) In the electrophotographic photoreceptor of (1) above, instead of the phenol compound, the following general formula [l-
d], (In the formula, R ¹² and R ¹³ represent a hydrogen atom or an optionally substituted alkyl group, alkenyl group, aryl group, or heterocyclic group.) An electrophotographic photoreceptor containing at least one compound represented by Is.

(5) In the electrophotographic photoreceptor of (1) above, the following general formula [l-
e], (R ¹⁴ and R ¹⁵ represent a hydrogen atom or an optionally substituted alkyl group, aryl group, alkenyl group, aralkyl group, alkoxy group, acyl group, azine group or heterocyclic group.) It is an electrophotographic photoreceptor containing one kind.

(6) In the electrophotographic photoreceptor of any one of (1) to (5), the following structural formula [ia-1] is used as a resin binder together with the naphthalene-based copolycarbonate. A bisphenol A-type polycarbonate having a structural unit represented by the following structural formula [ia-18], A bisphenol Z type polycarbonate having a structural unit represented by the following structural formula [ia-1] and formula [ia-2], The content ratio of the repeating unit represented by the general formula [ia-2] is represented by the repeating unit represented by the general formula [ia-1] and the general formula [ia-2]. Biphenyl copolymerization in the range represented by the following formula 0.01 ≦ [ia-2] / {[ia-1] + [ia-2]} ≦ 0.5 in terms of molar ratio to the total of repeating units It is an electrophotographic photoreceptor in which at least one resin binder selected from the group consisting of polycarbonate is mixed and used.

(7) In the electrophotographic photosensitive member according to any one of (1) to (6) above, at least a charge generating layer and a charge transport layer are laminated on a conductive substrate to form a laminated electrophotographic organic material. The photoconductor is a photoconductor for electrophotography in which the resin binder and the antioxidant are contained in the charge transport layer.

It has been confirmed that in the above-described electrophotographic photoreceptor of the present invention, the potential characteristics and the sensitivity characteristics do not change with time even after long-term use in an actual electrophotographic apparatus, and the amount of film abrasion is small. . That is, it was confirmed that the organic material forming the photosensitive layer has a function of preventing deterioration of the organic material due to charging, exposure and static elimination processes, and abrasion of the film by a cleaning blade.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Bisphenol A is used as a resin binder contained in a photosensitive layer of an organic photoreceptor for electrophotography.
Type, PCZ type and biphenyl type copolycarbonate, polystyrene, polyphenylene ether acrylic resin and the like are widely used as known materials, but in the present invention, the naphthalene type copolycarbonate alone type, or the polycarbonate and bisphenol A type,
A mixed system with Z-type or biphenyl-based copolycarbonate can be used. Further, these polycarbonates may be used in combination of three or more kinds.

The optimum viscosity average molecular weight range of the naphthalene-based copolycarbonate used in the present invention is 10,000 to 200,000, and the optimum average molecular weight range of the biphenyl-based copolycarbonate is 10,000 to 200,000. When the naphthalene-based copolycarbonate is mixed with the bisphenol A-type, Z-type or biphenyl-based copolycarbonate, the optimum weight mixing ratio is 5:95 to 95: 5.

As a specific example of the naphthalene-based copolycarbonate used in the present invention, the following structural formula [ia
-1] to [ia-22] and structural formulas [ib-1] to [ib-18] can be mentioned respectively.

[0020]

[0021]

[0022]

[0023]

Further, the above-mentioned general formulas [la], [lb], [lc], [ld] and [l] added to the photosensitive layer of the electrophotographic photoreceptor of the present invention.
Specific examples of the antioxidant represented by -e] are listed below by structural formulas.

[0025]

[0026]

[0027]

Specific application examples of the present invention will be described below with reference to the drawings. The so-called negatively charged laminated type photoreceptor shown in FIG. 1 comprises a support 1, a charge generation layer 2 and a charge transport layer 3. The so-called positively charged laminated type photoreceptor shown in FIG. 2 comprises a support 1, a charge transport layer 3, a charge generation layer 2 and a protective layer 4. Further, the so-called positively charged single-layer type photoreceptor shown in FIG. 3 comprises a support 1 and a photosensitive layer 5.

The case where the present invention is applied to a negative charging type laminated photoreceptor will be specifically described below. As the support, a conductive base such as an aluminum cylinder or an aluminum vapor-deposited film may be used alone, or the surface of the conductive base may be anodized, or a surface modified with a resin coating or the like may be used.

Examples of the material of the polymer dispersed film used for modifying the surface of the support include insulating polymers such as casein, polyvinyl alcohol, nylon, polyamide, melanin and cellulose, or conductive polymers such as polythiophene, polypyrrole and polyaniline. , Or metal oxide powders such as titanium dioxide and zinc oxide in these polymers,
Those containing a low molecular weight compound are used.

The charge generating layer is composed of a charge generating substance and a resin binder. As the charge generating substance, various phthalocyanine compounds, azo compounds, polycyclic quinone compounds and derivatives thereof shown in Specific Examples II-1 to II-26 below can be used. As the binder for the charge generation layer, polycarbonate, polyester, polyamide, polyurethane, epoxy polyvinyl butyral, polyvinyl acetal, phenoxy resin, silicone resin, acrylic resin, vinyl chloride resin, vinylidene chloride resin, vinyl acetate resin, homar resin, cellulose resin , Or their copolymers, their halides, and cyanoethyl compounds are used.

The charge transport layer comprises a charge transport material and a resin binder. As the charge-transporting substance, various hydrazone compounds, styryl compounds, amine compounds and derivatives thereof shown below as Specific Examples III-1 to III-12 can be used alone or in combination.

Polycarbonate, polystyrene, polyphenylene ether acrylic resin, etc. are generally widely used as the charge transporting resin binder, but in the present invention, the naphthalene copolymer polycarbonate is used.

Further, in the present invention, as the antioxidant added to the charge transport layer coating solution, the above-mentioned general formulas [la] and [l-
Antioxidants represented by b], [lc], [ld], and [le] are used.

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically based on embodiments. Example 1 A cylindrical substrate made of aluminum was washed as a conductive substrate,
The dried one was used. Polyamide having a number average molecular weight of 100,000 (trade name: T171, manufactured by Daicel-Hüls)
Resin coating solution prepared by dissolving 4 parts by weight and 1 part by weight of styrene-maleic acid resin (trade name: Sprapearl AP, manufactured by BASF Japan Ltd.) in a mixed solvent of 200 parts by weight of methanol and 100 parts by weight of 1-butanol. Resin coating on the cylindrical substrate by a dip method (Dip method).
Method) to form a support.

Dichloromethane was prepared by using 1 part by weight of the phthalocyanine represented by the structural formula II-3 as a charge generating substance and 1 part by weight of a modified vinyl chloride resin (trade name: MR110, manufactured by Nippon Zeon Co., Ltd.) as a resin binder. After mixing with 60 parts by weight and kneading with a mixer for 3 hours, a coating liquid was prepared and a coating liquid for a charge generation layer was prepared.

Next, as the charge transport material, the above structural formula III-
100 parts by weight of the compound represented by 1 and the following formula consisting of the repeating unit represented by the structural unit [ia-1] / [ib-1] as a resin binder: And 100 parts by weight of a copolycarbonate having a viscosity average molecular weight of 30,000 and the above structural formula as an antioxidant.
5 parts by weight of the compound represented by I-1 was added to 80 parts of dichloromethane.
It was dissolved in 0 part by weight to prepare a coating liquid for the charge transport layer.
Here, the viscosity average molecular weight is determined from the reduction concentration at a temperature of 20 ° C. and a concentration of 0.5 g / dl using methylene chloride as a solvent. Each of the charge generation layer and the charge transport layer was formed on the support by using the above coating solution.
Sequential dipping method (Dip method) with a thickness of 2 μm and 20 μm
To form a photoconductor.

Example 2 A photoconductor was prepared in the same manner as in Example 1 except that 2 parts by weight of the compound represented by Structural Formula I-16 was used in place of the antioxidant of Example 1.

Example 3 A photoconductor was prepared in the same manner as in Example 1 except that 5 parts by weight of the compound represented by Structural Formula I-31 was used in place of the antioxidant of Example 1.

Example 4 Example 1 was repeated except that 50 parts by weight of the compound represented by the structural formula III-3 and 50 parts by weight of the compound represented by III-4 were used in place of the charge transport material of Example 1. A photoconductor was prepared in the same manner.

Example 5 A photoconductor was prepared in the same manner as in Example 4 except that 5 parts by weight of the compound represented by the structural formula I-9 was used in place of the antioxidant of Example 4.

Example 6 A photoconductor was prepared in the same manner as in Example 4 except that 0.5 part by weight of the compound represented by Structural Formula I-29 was used in place of the antioxidant of Example 4.

Comparative Example 1 Bisphenol A was used as the resin binder in the charge transport coating solution.
A photoconductor was produced in the same manner as in Example 1 except that 100 parts by weight of the type polycarbonate was used and the compound represented by the structural formula I-1 was not blended in the charge transport coating solution.

Comparative Example 2 Bisphenol A was used as the resin binder in the charge transport coating solution.
Example 1 in place of 100 parts by weight of type polycarbonate
A photoreceptor was produced in the same manner as described above.

Comparative Example 3 A photoconductor was prepared in the same manner as in Example 1 except that the compound represented by Structural Formula I-1 was not added to the charge transport coating solution.

Comparative Example 4 Bisphenol A was used as the resin binder in the charge transport coating solution.
A photoconductor was produced in the same manner as in Example 4 except that 100 parts by weight of the type polycarbonate was not used and the compound represented by the structural formula I-1 was not mixed in the charge transport coating solution.

Comparative Example 5 Bisphenol A was used as the resin binder in the charge transport coating solution.
Example 4 in place of 100 parts by weight of type polycarbonate
A photoreceptor was produced in the same manner as described above.

Comparative Example 6 A photoconductor was prepared in the same manner as in Example 4 except that the compound represented by Structural Formula I-1 was not added to the charge transport coating solution.

Example 7 Polyamide having a number average molecular weight of 100,000 (trade name: T171,
4 parts by weight of Daicel-Huls Co., Ltd. and styrene-maleic acid resin (trade name: Suprapearl AP, BASF Japan
Ltd.) 1 part by weight was dissolved in a mixed solvent of 200 parts by weight of methanol and 100 parts by weight of 1-butanol to prepare a resin film coating solution.
1 μm was formed by a dip method (Dip method) to prepare a support.

1 part by weight of the bisazo compound represented by the structural formula II-17 as a charge generating substance, and 1 part by weight of a diallyl phthalate resin (trade name: DAP K, manufactured by Osaka Soda Co., Ltd.) as a resin binder, Methyl ethyl ketone 6
The mixture was mixed with 0 parts by weight and kneaded with a mixer for 3 hours to prepare a coating liquid, to prepare a coating liquid for the charge generation layer.

Next, as the charge transport material, the above structural formula III-
100 parts by weight of the compound represented by 7 and the structural unit [ia-1]. [Ib-1] used in Example 1 as a resin binder, that is, bisphenol A having a viscosity average molecular weight of 30,000.
100 parts by weight of naphthalene copolymerized polycarbonate and 5 parts by weight of the compound represented by the structural formula I-1 as an antioxidant were dissolved in 800 parts by weight of dichloromethane to prepare a coating solution for the charge transport layer. Each of the charge generation layer and the charge transport layer was formed on the support by using the above coating solution.
Sequential dipping method (Dip method) with a thickness of 2 μm and 30 μm
To form a photoconductor.

Example 8 A photoconductor was prepared in the same manner as in Example 7 except that 1 part by weight of the compound represented by Structural Formula I-19 was used in place of the antioxidant of Example 7.

Example 9 A photoreceptor was prepared in the same manner as in Example 7 except that 0.1 part by weight of the compound represented by Structural Formula I-27 was used in place of the antioxidant of Example 7.

Example 10 In place of the charge transport material of Example 7, 50 parts by weight of the compound represented by the structural formula III-8 and the compound 5 represented by III-12 were used.
A photoreceptor was prepared in the same manner as in Example 7 except that 0 part by weight was used.

Example 11 A photoconductor was prepared in the same manner as in Example 10 except that 0.1 part by weight of the compound represented by Structural Formula I-28 was used in place of the antioxidant of Example 10.

Example 12 A photoconductor was prepared in the same manner as in Example 10 except that 5 parts by weight of the compound represented by Structural Formula I-31 was used in place of the antioxidant of Example 10.

Comparative Example 7 Bisphenol A was used as the resin binder in the charge transport coating solution.
A photoconductor was prepared in the same manner as in Example 7 except that 100 parts by weight of the type polycarbonate was used and the compound represented by the structural formula I-1 was not added to the charge transport coating solution.

Comparative Example 8 Bisphenol A was used as the resin binder in the charge transport coating solution.
Example 7 in place of 100 parts by weight of type polycarbonate
A photoreceptor was produced in the same manner as described above.

Comparative Example 9 A photoconductor was prepared in the same manner as in Example 7 except that the compound represented by Structural Formula I-1 was not added to the charge transport coating solution.

Comparative Example 10 Bisphenol A was used as the resin binder in the charge transport coating solution.
A photoconductor was produced in the same manner as in Example 10 except that 100 parts by weight of the type polycarbonate was not added and the compound represented by the structural formula I-1 was not blended in the charge transport coating solution.

Comparative Example 11 Bisphenol A was used as the resin binder in the charge transport coating solution.
Example 1 in place of 100 parts by weight of type polycarbonate
A photoconductor was prepared in the same manner as in No. 0.

Comparative Example 12 A photoconductor was prepared in the same manner as in Example 10 except that the compound represented by Structural Formula I-1 was not added to the charge transport coating solution.

Evaluation of Photoreceptor The electrophotographic characteristics of the photoreceptors prepared in Examples 1 to 6 and Comparative Examples 1 to 6 described above were evaluated as follows. For the purpose of evaluating potential fluctuations during continuous use, various photoconductors were mounted on a laser beam printer with fixed outputs of the charging mechanism, exposure mechanism, and static elimination mechanism, and the temperature and humidity (20 ° C, 60R
A running test was performed in which 20,000 A4 sheets were actually printed under the atmosphere of H). The light portion potential (VL) and the dark portion potential (VO) at the start of running were measured to obtain respective potential change amounts (ΔVL, ΔVO) at the end of running. Further, the amount of change in the film thickness after the running compared to before the running was defined as the film abrasion amount.

Further, Examples 7 to 12 and Comparative Examples 7-1
The electrophotographic characteristics of the photoconductor prepared in 2 were evaluated as follows. For the purpose of evaluating potential fluctuations during continuous use, various photoconductors were mounted on a copying machine with fixed outputs of the charging mechanism, exposure mechanism, and static elimination mechanism, and A3 paper was used under normal temperature and humidity (20 ° C, 60RH) atmosphere. A running test was performed to actually copy 50,000 sheets. The white paper potential (Vw) and the black paper potential (Vb) at the start of running were measured to obtain the respective potential change amounts (ΔVw, ΔVb) at the end of running. Further, the amount of change in the film thickness after the running compared to before the running was defined as the film abrasion amount.

The results are shown in Table 1 for Examples 1-6 and Comparative Examples 1-6, and Table 2 for Examples 7-12 and Comparative Examples 7-12.

[0072]

[Table 1]

[0073]

[Table 2]

As is clear from the above results, the photoreceptor not containing the bisphenol A / naphthalene copolycarbonate according to the present invention as the resin binder of the charge transport layer has a sharp film abrasion due to running, and also the present invention. A photoreceptor containing no antioxidant has a large potential fluctuation due to running and deviates from the practical range. Therefore, it was confirmed that by using the bisphenol A / naphthalene copolymer polycarbonate of the present invention and various antioxidants at the same time, an electrophotographic photoreceptor having excellent running characteristics and a long life can be obtained.

[0075]

In the electrophotographic photoreceptor of the present invention,
There is little change in characteristics due to running, and it exhibits excellent characteristics stability in continuous use over a long period of time, especially excellent printing durability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a negatively charged laminated electrophotographic photoconductor.

FIG. 2 is a cross-sectional view illustrating the structure of a positively charged laminated electrophotographic photoconductor.

FIG. 3 is a cross-sectional view showing a structure of a positively charged single-layer type electrophotographic photoconductor.

[Explanation of symbols]

 1 Support 2 Charge Generation Layer 3 Charge Transport Layer 4 Protective Layer 5 Photosensitive Layer

Claims (7)

[Claims] 1. An organic photoreceptor for electrophotography having a photosensitive layer on a conductive substrate, wherein the following structural formula [ia] and formula [ib] are used as a resin binder in the photosensitive layer: (In the formula, Y is-, -O-, -CO-, -S-, -SO ₂
—, —CR ⁵⁵ R ⁵⁶ — (wherein R ⁵⁵ and R ⁵⁶ are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms).
Or a 1,1-cycloalkylidene group having 5 to 7 carbon atoms, wherein R ⁵¹ , R ⁵² , R ^53, and R ⁵⁴ are each independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or 5 carbon atoms. To 7 cycloalkyl groups or 6 to 6 carbon atoms
12 represents a substituted or unsubstituted aryl group, a and b are each independently an integer of 0 to 4, and c and d are each independently an integer of 0 to 3. ), The content of the repeating unit represented by the general formula [ib] is the same as that of the repeating unit represented by the general formula [ia] and the repeating unit represented by the general formula [ib]. It contains a naphthalene-based copolycarbonate in a range represented by the following formula in a molar ratio to the total, 0.01 ≦ [ib] / {[ia] + [ib]} ≦ 0.5, and also as an antioxidant. The following general formula [l-
a], (In the formula, R ¹ , R ² and R ³ represent a hydrogen atom, a halogen atom, a hydroxyl group, or an optionally substituted alkyl group, an aryl group, an alkenyl group, an aralkyl group, an alkoxy group, an acyl group or a heterocyclic group. Where n is 1 to 3
Which is an integer of at least one). 2. The following general formula [lb], in place of the phenol compound, (Wherein R ⁴ , R ⁵ , R ⁶ , R ^7, and R ⁸ represent a hydrogen atom or an optionally substituted alkyl group, alkenyl group, or aryl group), and at least one compound is contained. Item 1. An electrophotographic photoreceptor according to Item 1. 3. Instead of the phenol compound, the following general formula [lc], (In the formula, R ⁹ and R ¹⁰ are a hydrogen atom or an optionally substituted alkyl group, alkenyl group, aryl group, R ¹¹
Represents a direct bond or an oxygen atom. The electrophotographic photoreceptor according to claim 1, which contains at least one compound represented by the formula (1). 4. Instead of the phenol compound, the following general formula [ld], (Wherein R ¹² and R ¹³ represent a hydrogen atom or an optionally substituted alkyl group, alkenyl group, aryl group, or heterocyclic group) and at least one compound is contained. Electrophotographic photoreceptor. 5. The following general formula [le], instead of the phenol compound, (R ¹⁴ and R ¹⁵ represent a hydrogen atom or an optionally substituted alkyl group, aryl group, alkenyl group, aralkyl group, alkoxy group, acyl group, azine group or heterocyclic group.) The electrophotographic photosensitive member according to claim 1, which contains one kind. 6. A resin binder, together with the naphthalene-based copolycarbonate, represented by the following structural formula [ia-
1], A bisphenol A-type polycarbonate having a structural unit represented by the following structural formula [ia-18], A bisphenol Z type polycarbonate having a structural unit represented by the following structural formula [ia-1] and formula [ia-2], The content ratio of the repeating unit represented by the general formula [ia-2] is represented by the repeating unit represented by the general formula [ia-1] and the general formula [ia-2]. Biphenyl copolymerization in the range represented by the following formula 0.01 ≦ [ia-2] / {[ia-1] + [ia-2]} ≦ 0.5 in terms of molar ratio to the total of repeating units The electrophotographic photoreceptor according to claim 1, wherein at least one resin binder selected from the group consisting of polycarbonate is mixed and used. 7. A laminated type organic photoconductor for electrophotography, comprising at least a charge generation layer and a charge transport layer laminated on a conductive substrate, wherein the resin binder and the antioxidant are contained in the charge transport layer. 7. The electrophotographic photoconductor according to claim 1, wherein the electrophotographic photoconductor contains: