JPH03198061A - Electrophotographic sensitive body - Google Patents

Abstract

PURPOSE:To obtain an electrophotographic sensitive body superior in flexibility, film strength, and adhesiveness by incorporating a polysilane derivative optionally substituted by arylene groups on the main chain. CONSTITUTION:The polysilane derivative to be added to the photosensitive layer has the optionally substituted arylene groups on the main chain represented by formula I in which each of R<1> - R<4> is H or optionally substituted alkyl, alkoxy, alkenyl, aryl, alkylsilyl, or arylsilyl; Ar is an optionally substituted arylene group each of x, y, and z is a proportion of units derived from each monomer, thus permitting the obtained photosensitive body to be enhanced in adhesiveness, film strength, and flexibility.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to electrophotographic reproduction, and particularly to the structure of a photosensitive layer of a photoreceptor.

[Prior art]

As electrophotographic photoreceptors, inorganic photoreceptors having an inorganic photosensitive layer made of an inorganic photoconductive compound such as selenium, zinc oxide, or cadmium sulfide have been widely used.

However, such inorganic photoreceptors are not necessarily fully satisfactory in terms of sensitivity, thermal stability, moisture resistance, durability, etc. For example, an inorganic photoreceptor with an inorganic photoreceptor layer made of selenium tends to crystallize at high temperatures and deteriorate its properties as an electrophotographic photoreceptor, so severe temperature conditions are required in the manufacturing process. When handling it, it is necessary to avoid crystallization due to heat, fingerprints, etc. Furthermore, inorganic photoreceptors having an inorganic photosensitive layer made of cadmium sulfide or zinc oxide have poor moisture resistance and durability.

Under these circumstances, in recent years, research and development of organic photoreceptors having an organic photosensitive layer made of an organic photoconductive compound has been actively conducted.

For example, Japanese Patent Publication No. 50-10496 discloses an organic photoreceptor having an organic photosensitive layer containing poly-N-vinylcarbazole and 2,4,7-)dinitro-9-fluorenone. However, this organic photoreceptor is still insufficient in terms of sensitivity and durability.

In response to this, an organic photoreceptor having a so-called functionally separated organic photosensitive layer in which the carrier (hole or electron) generation function and the carrier transport function are shared by different substances has been developed. Such an organic photoreceptor has the advantage that the selection range of materials constituting the photosensitive layer is greatly expanded, and organic photoreceptors having various performances can be produced relatively easily.

Various azo compounds have been put into practical use as carrier-generating substances that share the carrier-generating function, and examples of carrier-transporting substances that share the carrier-transporting function include, for example, JP-A-51-94829, JP-A-52-72231, and JP-A-52-72231. 53-
No. 27033, No. 55-52063, No. 58-654
This method has been proposed in various publications such as No. 40 and No. 58-198425.

However, organic photoreceptors constructed using the above-mentioned carrier transport materials do not have sufficient carrier transport ability, and when subjected to high-speed copying processes particularly at low environmental temperatures, they may suffer from decreased sensitivity or residual potential. This results in a disadvantageous increase in Furthermore, even if the copying process is made easier by reducing the diameter of the photoreceptor drum, conventional carrier transport materials do not have sufficient carrier transport ability, so the reduction in the diameter of the drum inevitably leads to a reduction in process speed. .

Under these circumstances, a technology using polysilane with a specific structure as a carrier (hole) transport material has recently been proposed (
JP-A-61-10747, JP-A No. 62-269964,
(See No. 63-285552). According to this polysilane, unlike the above-mentioned carrier transport materials, it has self-forming properties, so it is possible to easily form a film-like photosensitive layer without combining it with other binders, and The mobility of holes is approximately 10-'c■! /v-8ec or more, which is about one order of magnitude larger than that of conventional carrier transport materials, and the disadvantage of organic photoreceptors constructed using conventional carrier transport materials is that the use of this material It is resolved by

However, a photosensitive layer constructed using this polysilane has poor flexibility, generally has low film strength, and furthermore has poor adhesiveness. Therefore, even if a polysilane film is formed on a flexible belt base, damage such as cracking and film peeling is likely to occur, and if the electrophotographic process is repeated, this phenomenon will further progress and expand. I'm going to go. In addition, the surface may be damaged or the film may peel off due to the abrasion force exerted by toner during development or cleaning members during cleaning.
As a result, defects such as white streaks and black streaks occur early in the resulting copied image, and the image quality deteriorates. This phenomenon becomes more noticeable when the size of the copying process is reduced and the diameter of the drum is reduced or the curvature of the belt base is increased. Another problem is that polysilane has a relatively low dark resistance, and organic photoreceptors constructed using it have insufficient charging ability.

[Purpose of the invention]

Based on the above circumstances, the objects of the present invention are (1) to have excellent hole transport ability, flexibility, mechanical strength, and adhesiveness;
and (2) to provide an electrophotographic photoreceptor that can accommodate both miniaturization and speeding up of a copying process.

[Structure and effects of the invention]

The above object of the present invention is achieved by an electrophotographic photoreceptor whose photosensitive layer contains a polysilane having a substituted or unsubstituted arylene group in the main chain.

Furthermore, in an aspect of the present invention, it is preferable that the polysilane is a compound represented by the following general formula (a).

General formula (a) In the formula, R1, R2, R3, and R4 are hydrogen atoms or six groups that may have substituents; alkyl group, alkoxy group, alkenyl group, aryl group, alkylsilyl group, and arylsilyl group. represents a group and may be the same or different from each other. Ar represents an arylene group which may have a substituent.

x+y and 2 represent the proportion of each heptad unit in the compound (hereinafter referred to as arylene silane polymer).

Furthermore, the manner in which the arylene group is interposed in the main chain is arbitrary.

The arylene silane polymer has a number average degree of polymerization in terms of styrene of 2,000 to 200,000, and a weight average degree of polymerization of 5.
It is preferable that it is 000-200000. If the degree of polymerization is less than the above range, film formability and electrophotographic performance will be poor;
If the degree of polymerization exceeds the above range, flexibility will be significantly reduced.

Furthermore, regarding X+Y+Z, when X+y+2-1, 0.05≦z/(x+y)≦0.8, more preferably 0.1≦z/(x+y)≦0.6.

If 2 is less than this range, flexibility, film strength, and adhesiveness will be poor, and if it exceeds this range, carrier transport ability will be reduced.

The alkyl group represented by R1 to R4 constituting the general formula (a) includes a straight chain or branched alkyl group having 1 to 24 carbon atoms, preferably 1 to 8 carbon atoms, such as a methyl group, an ethyl group, a propyl group, Butyl group, amyl group, hexyl group,
Examples include cycloalkyl groups such as octyl group, nonyl group, decyl group, pentadecyl group, stearyl group, and cyclohexyl group, and substituted alkyl groups thereof.

The aryl group preferably has 6 to 24 carbon atoms, and examples thereof include a phenyl group, a naphthyl group, an anthryl group, and the like.

The alkoxy group preferably has 1 to about 10 carbon atoms, and includes, for example, a methoxy group, an ethoxy group, a propoxy group, a butoxy group, and the like.

The alkenyl group preferably has 2 to about 10 carbon atoms, and examples thereof include a vinyl group, an allyl group, a butenyl group, and the like.

As the alkylsilyl group, -5iH(CHs)x.

5i(CHs)s, 5i(CzHi)s, 5i
(CsHy)s.

5l (C4HI) 3.5l (CH3)2 (CtH6).

5i(CI3)(CtHs)z and the like.

The arylsilyl group is -5iH(C,H,), 5
i(CHx)t(CsHa), CH25i(CI(3
)z(CaHs).

Substituents for R1 to R4 and Ar include alkyl groups, alkoxy groups, aryl groups, amino groups, nitro groups,
Examples include a cyano group, a halogen atom, and other substituents.

Preferred examples of the silane monomer unit of the arylsilane polymer include the following: 3-(i-
CJr)Si(CH3) 4-(CJs)Si(
CHs)5 (tCaHs)Si(CHs)
6 (CaH+3)Si(CHs)(CsHy
)Si(C3H7) − (Cs)l++)zSI (CyH+ 5)zsi −(C1゜H□)ISi − (c4ne)si(c4ul) − (CsH+x)tSi − (CaH+r)tSi − '−(Ct*His ) tSi − is expressed as + (R') and Si−.

1 (CsHy)Sl(CHs) - Next, as the aryl monomer unit of the arylsilane polymer, the following are listed as preferred.

Methods for polymerizing these seven polymers include R and D.

Miller & Josef Michl rche
mical Reviews 89°1359-141
0 (1989) J, R, West r summer norg
anic 5ynth-eses vol, 25 p
56-60J and W described in these cited documents
The electrophotographic photoreceptor of the present invention can utilize an urtz condensation reaction, a dehydrogenation condensation reaction, an ultrasonic activated condensation reaction, etc. It has layers.

That is, the electrophotographic photoreceptor of the present invention basically has a functionally separated organic photosensitive layer composed of an arylene silane polymer in combination with a carrier generating substance, and this organic photosensitive layer can be used directly or with another layer. For example, it is constructed by laminating it on a conductive support via a conductive support.

The specific structure of the organic photosensitive layer is not particularly limited, and various structures as described below are possible.

(1) A configuration in which a carrier transport layer and a carrier generation layer are separate and independent layers (hereinafter referred to as "configuration (1)").

(2) A structure in which a carrier-generating substance is dispersed and contained in an arylene silane polymer without forming an independent carrier-generating layer (hereinafter referred to as "Structure (2)").

According to such a functionally separated organic photosensitive layer, carrier generation and carrier transport are handled by separate substances, so carrier generation substances can be selected from a wide range, and the characteristics required in the image forming process can be met. Therefore, it becomes possible to construct an organic photoreceptor having excellent properties such as a high surface potential when charged, high photosensitivity, and high stability in repeated use.

Since the specific hole-transporting substance of the present invention; the arylene silane polymer itself has high film-forming properties, it can be used in the carrier-transporting layer in the above configuration (1) or the above-mentioned structure without using a binder. A photosensitive layer in configuration (2) can be formed.

The carrier transport layer in the above configuration (1) or the photosensitive layer in the above configuration (2) may be formed only of the arylene silane polymer, or other substances may be used in combination as necessary to achieve desired characteristics. May be granted. As such other substances, (1) those having binder insulating properties for increasing the insulating properties and being compatible with the arylene silane polymer are used. Specifically, for example, polycarbonate, polyester, methacrylic resin, acrylic resin, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, polyisoprene, polybutadiene, polyamide resin, polyurethane resin; styrene-butadiene copolymer, styrene-methacrylic Styrene copolymer resins such as acid methyl copolymers; acrylonitrile copolymer resins such as vinylidene chloride-acrylonitrile copolymers; vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-maleic anhydride copolymers , silicone resin, silicone-alkyd resin, phenol resin, styrene-alkyd resin, poly-N-vinylcarbazole, polyvinyl butyral, polyvinyl formal, polyhydroquinestyrene, and the like. These binders can be used alone or in combination of two or more. The combined proportion of these binders is 5 to 50 wt% of the weight of the carrier transport layer in the above structure (1) and the photosensitive layer in the above structure (2), excluding the carrier generating substance.

(2) Other n-type carrier transport substances for reducing residual potential Examples of such other n-type carrier transport substances include tetracyanoethylene, tetracyanoquinodimethane, dichlorodicyanobarabenzquinone, and tricyanoquinodimethane. Examples include nitrofluorenone, tetranitrofluorenone, fluorenylidenemalonocynitrile, annealed compounds, and the like. Such a carrier transport substance can also be added to the carrier generation layer in the above structure (1).

(3) Additives to stabilize potential and polymer properties In order to prevent deterioration of potential and polymer properties caused by light, heat, ozone, and other chemical substances, the following substances may be added as additives. can.

■ Hindered phenolic antioxidants (for example, IRGANOX 1010, IRGANOX 245, manufactured by Chihakaigy Co., Ltd.)
259, 1035. 1076, 1081. Same 1
098. 1222° 1330. 1425WL, 3114. 5057, etc.) Ultraviolet absorbers (for example, manufactured by Ciba Geigy; TINUVIN, P, 234.
320. 326. 327. 328, 213, etc.) ■ Light stabilizers, UV stabilizers (for example, Ciba Geigy, TINUVIN 622LD, CHIMASS)
ORB 944LD.

TINUVIN 144. CHIMASSORB l
19 nato) Carrier generating substances are not particularly limited as long as they absorb light in the range from visible light to infrared light and generate free carriers, but specifically,
It can be selected from inorganic pigments, organic pigments, etc.

Examples of such inorganic pigments include amorphous selenium, trigonal selenium, selenium-arsenic alloy, selenium-tellurium alloy, and cadmium sulfide.

Examples of organic pigments include (1) azo pigments such as monoazo pigments, bisazo pigments, trisazo pigments, and metal complex azo pigments; (2) perylene pigments such as perylene anhydride and perylene imide; (3) anthraquinone derivatives, anthanthrone derivatives, dibenzpyrenequinone derivatives,
Polycyclic quinone pigments such as pyranthrone derivatives, violanthrone derivatives, and isoviolanthrone derivatives; (4) indigoid pigments such as indigoid derivatives and thioindigoid derivatives; (5) 7-lycyanine pigments such as metal phthalocyanine and metal-free phthalocyanine; etc. can be mentioned.

Such a carrier-generating substance has poor film-forming properties by itself, so when forming an independent carrier-generating layer, it is preferable to use a binder together.

The binder used in the carrier generation layer in the above configuration (1) is not particularly limited, but it is preferable to use, for example, a high molecular weight polymer that is hydrophobic and capable of forming an insulating film. As such a high molecular weight polymer, the same substances as those exemplified as the binder for improving the insulation properties can be used. These binders can be used alone or in combination of two or more. Such a binder may be used in an amount of 5 parts by weight of the carrier-generating material.
It is preferable to use it within a range of parts by weight or less.

As the conductive support, (1) a plate-shaped or drum-shaped conductive support made of metal such as aluminum or stainless steel, (2) a support such as paper or plastic film, and aluminum, palladium, gold, etc. (3) A conductive support consisting of a thin layer of metal, such as a conductive polymer, indium oxide, tin oxide, etc., provided on a support such as paper or plastic film by lamination or vapor deposition. Examples include a conductive support having a structure in which a layer is provided by coating or vapor deposition.

Next, a specific example of the structure of the electrophotographic photoreceptor according to the present invention will be described with reference to the drawings.

FIG. 1 shows an example in which an electrophotographic photoreceptor is constructed by laminating a carrier generation layer 2 on a conductive support l, and further laminating a carrier transport layer 3 thereon.

In this example, an organic photosensitive layer 4 is constituted by a carrier generation layer 2 and a carrier transport layer 3, which are independent of each other.

FIG. 2 shows the carrier generation layer 2 and the carrier generation layer 2 in the example of FIG.
This is a configuration in which the stacking order of the carrier transport layer 3 is reversed.

FIG. 3 shows a structure in which an intermediate layer 5 is added between the carrier generation layer 2 and the conductive support l in the example of FIG. 1.

This intermediate layer 5 functions as, for example, an adhesive layer, a barrier layer, etc.

FIG. 4 shows a configuration in which an intermediate layer 5 is added between the carrier transport layer 3 and the conductive support 1 in the example shown in FIG. 2, and an overcoating layer 8 is further provided on the carrier generation layer 2. It is. This overcoating layer 8 is provided as necessary.

FIG. 5 shows an organic photosensitive layer 4 consisting of a single layer composed of a layer 6 containing a hole-transporting substance and a carrier-generating substance 7 in the form of fine particles dispersed therein on a conductive support l. It has a laminated structure.

FIG. 6 shows a structure in which an intermediate layer 5 is added between the organic photosensitive layer 4 and the conductive support l in the example of FIG. 5.

When the organic photosensitive layer 4 has a multilayer structure including the carrier generation layer 2 and the carrier transport layer 3, which of the carrier generation layer 2 and the carrier transport layer 3 is used as the upper layer depends on the charging polarity of the organic photosensitive layer 4. It is preferable to determine based on That is, when the charge polarity is negative, it is advantageous to use the carrier transport layer 3 as the upper layer, as shown in FIGS. 1 and 3.

The method for forming the carrier transport layer 3 is not particularly limited, but specifically, various methods such as a dip coating method, a spray coating method, a blade coating method, a roll coating method, a laminating method, a melt extrusion method, etc. can be used. Can be applied.

That is, since the arylene silane polymer according to the present invention exhibits sufficient solvent solubility, a carrier transport layer can be formed by applying a common coating method.

In addition, a crosslinking agent may be added to the coating solution as necessary.
Furthermore, a crosslinking reaction initiator may be added. In this case, a strong carrier transport layer 3 having a crosslinked structure can be formed.

The thickness of the carrier transport layer 3 can be changed as necessary, but is usually 2 to 50μ, preferably 5 to 30μ.
It is μm.

The method of forming the carrier generation layer 2 is not particularly limited, but specific examples include: 1) a vacuum evaporation method, 2) a method of applying a solution of a carrier-generating substance dissolved in an appropriate solvent, and 2) a method of applying a carrier-generating substance to a ball mill or a sand grinder. It is possible to apply a method such as forming the particles into fine particles in a dispersion medium by, for example, applying a dispersion obtained by mixing and dispersing them with a binder as necessary.

The thickness of such carrier generation layer 2 is usually 0. O1~lO
.mu.-, preferably 0.05 to 5 .mu..

Incidentally, as shown in FIG. 5 or 6, a carrier generating substance 7 in the form of fine particles is included in the layer 6 containing a hole transporting substance.
When constituting the photosensitive layer 4 by dispersing the carrier-generating substance 7, the content of the carrier-generating substance 7 is 10 to 99 wt% of the photosensitive layer 4.
is preferred.

The intermediate layer 5 functions as an adhesive layer or a barrier layer, and specifically includes materials such as polyvinyl alcohol, ethyl cellulose, carboxymethyl cellulose, and casein in addition to the materials already mentioned as binders used in the carrier generation layer. etc. can be configured.

For the overcoating layer 8, a resin used as a binder for the carrier generation layer can be used. In addition, in order to assist the movement of carriers in the layer, the above-mentioned n-type carrier transport substances, pyrazoline derivatives, benzidine derivatives, oxazole derivatives, oxadiazole derivatives, polyphenylamine derivatives, styrylamine derivatives,
It is preferable to use a mixture of p-type carrier transport substances such as hydrazones. The thickness of this overcoating layer 8 is preferably from 0.1 to 10 μm, particularly preferably from 0.5 to 5 μm.

〔Example〕

Examples of the present invention will be specifically described below, but the present invention is not limited to these Examples.

Synthesis Example 1 A reflux condenser, a stirring rod driven by a motor rotation, and a dropping funnel were attached to a 500+ off three-day round bottom flask, and the apparatus was completely dried and purged with A gas.Purified 11.8
g of p-dibromobenzene tetrahydro 7 run loO
2.43 g of magnesium was added to +ml to prepare a Grignard reagent. This reagent contains 2LOg of distilled and purified methylphenyldiethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd.,
LS3970) was added dropwise over about 3 hours and stirred. The reaction solution was filtered and the solvent was removed by distillation to obtain 15 g of p-bis(methylphenylethoxysilyl)benzene. Next, 9-2g of p-bis(methylphenylethoxysilyl)benzene and 25g of acetyl chloride were refluxed for about 5 hours, and 8.2g of p-bis(chloromethylphenylsilyl)benzene was purified by distillation. Obtained.

Furthermore, a 300a+<1 round bottom flask was equipped with a reflux condenser, a stirring bar driven by a motor, and a dropping funnel.

Using this, 100md of benzene containing 15g of p-bis(chloromethylphenylsilyl)benzene in a dispersion of 5g of sodium metal and 100+s12 of toluene.
The solution was added dropwise. During this time, the reaction solution was rotated vigorously and
Heated to ~80°C for approximately 20 hours. Thereafter, the reaction solution was poured into a 1/l solution of benzene/ethanol to cause precipitation, followed by filtration and drying. Further, the solution was washed with water to remove salt, and the solution was poured into benzene/ethanol-1/1 again for precipitation, filtration, and drying to obtain the following polymer.

and further refluxed for 30 hours. During this time, the reaction solution turned purple. After cooling this to room temperature, 5g of NaHCO,
and 50 mQ of 2-propanol were added and stirred for 5 hours. Pour this reaction solution into IOQ's 2-proper tool,
A purple precipitate was collected. This precipitate was dissolved in 1Q of toluene, and two-phase extraction was performed with 10ffi of pure water. The toluene phase was taken out, and the toluene was evaporated and dried to obtain the following white polymer.

<Synthesis Example 2> A reflux condenser, a stirring bar driven by a motor rotation, and a dropping funnel were attached to a 2000 m12 three-day round bottom flask. To this, 0.5 mol of methylphenyldichlorosilane purified by vacuum distillation (Shin-Etsu Chemical Co., Ltd.; LS1490) and dimethyldichlorosilane (Shin-Etsu Chemical Co., Ltd.; LS13) were added.
0) Add 0.4 mol, p-dichlorobenzene (Kanto Kagaku Co., Ltd.) 0.1 mol and 1Q of dehydrated toluene, and make 1
Refluxed for an hour. Thereafter, 2.05 mol of metallic sodium made into fine sand was gradually added over 3 hours.Synthesis Example 3> Same as Synthesis Example 2. However, as a synthetic material, PhSiMeC
ffz-0.4 mol, phcffi! -o,: 3 mol,
(CHs)xsicJ -0.3 mol was used.

<Synthesis Example 4> Same as Synthesis Example 2. However, PhSiMeCCffi-0,
2 mol, PhCQ2 = 0.6 mol, (C)Is) *5
iC12t -0.2 mol.

Synthesis Example 5> Same as Synthesis Example 2. However, PhSiMeCe* -0-4
mol, PbCO2-0.3 mol, (C1h(CHz)3
)zsiclh (Shin-Etsu Chemical; ts-2250)
-0.3 mol.

<Synthesis Example 7 Same as Synthesis Example 2. However, PhSiMeC(lx −0,
8 mol, PbCO2-0.2 mol, MelSiC(11
-0 mol.

<Synthesis Example 6><Comparative Example 1> Same as Synthesis Example 2. However, PhSiMeCL -0.5 mol, Me, 5iC12 = -0.5 mol.

Comparative Example 2> Same as Synthesis Example 2. However, Me, SiC<lx=0.
5 mol, PhMeSiCL -0.4 mol, (CI(x
(CHx)s)*5iC5-0.1 mol.

Photoconductor Preparation Example 1> A 0-thick photoreceptor made of copolyamide (cM-aooo; manufactured by Toshi) on a polyester base coated with aluminum vapor.
．． A 15μ-middle layer was created.

Next, 2 parts of titanyl phthalocyanine was added as a carrier generating substance, and silicone resin (rKR-5) was added as a binder resin.
15 parts of 240.15% xylene butanol solution (manufactured by Shin-Etsu Chemical Co., Ltd.) and 100 parts of cyclohexanone as a dispersion medium were dispersed using a sand mill, and this was applied with a wire bar to form a carrier generation layer with a film thickness of 0.2 μm. .

Next, as a carrier transport layer, 20 parts of the compound of Synthesis Example 1 was dissolved in 100 parts of tetrahydrofuran, and a film thickness of 20 μm was formed using a blade coater.

<Photoreceptor Preparation Examples 2 to 7 and Comparative Examples 1 and 2> Photoreceptors were prepared in the same manner, except that only the compounds were changed.

Evaluation 1 The obtained sample was evaluated using a modified printer LP-3010 (manufactured by Konica) equipped with a semiconductor laser light source. The unexposed part potential V and the exposed part potential VL were determined and used as sensitivity evaluation values, which are shown in Table 1. The physical properties of the film, such as adhesion, film strength, and flexibility, were judged based on the following criteria from a practical standpoint.

◎: Sufficiently practical 0: Practical Δ: Poorly practical Table 1 (manufactured by Teijin Chemicals) 0.5 parts by weight was mixed with 100 parts by weight of 1,2-dichloroethane and heated in a ball mill for 24 hours. A coating solution was prepared by dispersion, and a carrier generation layer having a thickness of 0.5 μm after drying was formed on the intermediate layer by a dipping method using this coating solution.

Next, a coating solution was prepared using the polymer obtained in Synthesis Example 1, and a coating solution was coated on the carrier generation layer to a film thickness of 20 μm after drying.
An electrophotographic photoreceptor of the present invention was manufactured by forming a carrier transport layer according to the method described above.

Photoconductor Preparation Examples 8 to 14 and Comparative Examples 3 and 4> Vinyl chloride-vinyl acetate-maleic anhydride copolymer “Eslec MF-10J (Fishui Kagaku Kogyo Co., Ltd. An intermediate layer with a thickness of 0.1 gv is provided.

1 part by weight of dibrome anthron [Monolite Red 2 Y J (manufactured by IC1) represented by the following structural formula,
Polycarbonate resin "Panlite L-1250J evaluation 2 The obtained sample was evaluated using a modified Konica 1550MR (manufactured by Konica). Black paper potential V and white paper potential Vw were determined, sensitivity was evaluated, and film physical properties were evaluated. were evaluated and shown in Table 2.

Table-2 A carrier generation layer of 0.4μ intestine was formed.

:Structural formula: <Photoconductor Preparation Examples 15 to 21 and Comparative Examples 5 and 6> A conductive support made of an aluminum vapor-deposited polyester base was coated with a 0.0mm thick nylon copolymer X1874M (manufactured by Daicel Huels Ltd.). An intermediate layer of 1 μm was provided.

Furthermore, 1 part by weight of a bisazo pigment represented by the following structural formula,
Polycarbonate resin [Panlite L1300J (manufactured by Teijin Chemicals) 0.5 parts by weight was added to Tetrahydro 7 Run 10
0 parts by weight and dispersed in a ball mill for 24 hours to prepare a coating solution. Using this coating solution, the coating solution was coated on the intermediate layer by the dipping method, and the film thickness after drying was evaluated as 3. Evaluation was carried out 1, and the results are shown in Table 3. 3...Carrier transport layer 5...Intermediate layer 8...Overcoating layer

Claims (2)

[Claims] (1) An electrophotographic photoreceptor whose photosensitive layer contains polysilane having a substituted or unsubstituted arylene group in its main chain. (2) The electrophotographic photoreceptor according to claim 1, wherein the polysilane is a compound represented by the following general formula (a). General formula (a) ▲ Numerical formulas, chemical formulas, tables, etc. Group; alkyl group,
It represents an alkoxy group, an alkenyl group, an aryl group, an alkylsilyl group, and an arylsilyl group, and may be the same or different from each other. Ar represents an arylene group which may have a substituent. x, y and z represent the proportion of each monomer unit in the compound. ]