JPH03245153A - Electrophotographic sensitive body - Google Patents

Abstract

PURPOSE:To prevent image trailing due to repeated use by irradiating with light containing light of wavelengths absorbable by the polysilane used. CONSTITUTION:The electrophotographic sensitive body is formed by successively laminating on a conductive substrate 101 an electric charge generating layer 102 containing a charge generating material and a surface layer (charge transfer layer) 103 containing the polysilane in this order from the substrate 101, and it is irradiated with the light containing the light of wavelengths absorbable by the polysilane to be used, thus permitting the polysilane in the surface layer 103 to be gradually decomposed and removed, and paper powder to be restrained from accumulating on the surface of the photosensitive body, and consequently image trailing to be prevented and high-quality images to be stably formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrophotographic method, and more particularly to an electrophotographic method using an electrophotographic photoreceptor containing a polysilane in its surface layer that provides improved electrophotographic properties. It is.

[Conventional technology]

Conventionally, various organic photoconductive polymers, including polyvinylcarbazole, have been proposed as photoconductive materials for use in electrophotographic photoreceptors. Although these polymers are superior in terms of film formability and light weight compared to inorganic photoconductive materials, their practical application has been difficult until now due to insufficient film formability. This is because they are inferior to inorganic photoconductive materials in terms of sensitivity, durability, and stability against environmental changes. Also, as an organic photoconductive material for electrophotographic photoreceptors, U.S. Patent No. 4.150
．． A hydrazone compound is disclosed in US Pat. No. 987, a triarylpyrazoline compound is disclosed in U.S. Pat. Each has been proposed and they are of small molecules. However, none of these low-molecular-weight organic photoconductors can solve the film-forming problems that have been a problem in the field of organic photoconductive polymers by appropriately selecting the binder used. Although there are some, they are not sufficient in terms of sensitivity and are not of practical use in obtaining a desired electrophotographic photoreceptor.

For these reasons, a laminated structure in which the photosensitive layer is functionally separated into a charge generation layer and a charge transport layer has been proposed in recent years. An electrophotographic photoreceptor having this laminated structure as a photosensitive layer is
It has become possible to improve sensitivity to visible light, charge retention, surface strength, etc. Such electrophotographic photoreceptors are disclosed, for example, in US Pat. No. 3,837,851 and US Pat. No. 3,871,882.

However, when forming the charge transport layer using a conventional low-molecular organic photoconductor, the organic photoconductor material is mixed with a predetermined binder resin. For this reason, the electrophotographic photoreceptor obtained has low charge mobility due to the binder resin, does not necessarily have sufficient sensitivity and characteristics, and when repeatedly charged and exposed, the bright area potential The dark area potential fluctuates greatly, resulting in insufficient durability.

For these reasons, polysilane has been proposed as a photoconductive material that has the potential to provide desired organic electrophotographic photoreceptors (U.S. Pat. No. 4,618,551;
Specification No. 4.772.525, JP-A-62-269
No. 964), polysilane is attracting attention as a material capable of providing electrophotographic photoreceptors with excellent sensitivity, durability, and bottom moldability.

However, photoreceptors made of polysilane are extremely durable with little abrasion, so when they are actually used in an electrophotographic device, paper dust from the transfer paper accumulates on the surface of the photoreceptor. , the accumulated paper powder absorbs moisture in a high-temperature environment and lowers its resistance, making it no longer possible to retain an electrostatic latent image (when this phenomenon occurs, the image appears to flow in streaks, resulting in "image blurring"). ”) occurs, making it impossible to maintain high-quality images.

[Purpose of the invention]

An object of the present invention is to solve the above-mentioned problems in electrophotography using polysilane as an optical IT material, and to provide an electrophotography method that can maintain high quality images without image deletion.

[Structure and effects of the invention]

The present invention was completed as a result of intensive research to achieve the above-mentioned object, and its main points are:
In an electrophotographic method using an electrophotographic photoreceptor containing borinlane in its surface layer, the purpose is to irradiate light with a wavelength that can be absorbed by the polysilane used. According to the present invention, since the polysilane on the surface layer can be gradually decomposed and removed, paper dust does not accumulate on the surface of the photoreceptor, making it possible to always obtain high-quality images. In the present invention, light sources used for light irradiation include tungsten lamps, halogen lamps, fuse lamps, LEDs, EL, semiconductor lasers, etc., and may also be used for image exposure, erase exposure, etc., or may be used for purposes such as image exposure, erase exposure, etc. It may also be used as a separate light source.

Furthermore, another feature of the present invention is that it uses a cleaning blade with a load of 10 g/am or more, which increases the effectiveness of removing paper dust that gets caught in the cleaning blade.
This makes it possible to maintain high quality images.

The present invention will be explained in detail below.

The electrophotographic photoreceptor containing polysilane in the surface layer used in the present invention has a light-receiving layer composed of a plurality of functionally separated layers.
It is of the form shown in the figure.

That is, the electrophotographic photoreceptor of the present invention having the form shown in FIG. , are laminated in this order from the support l○1 side.

The electrophotographic photoreceptor of the present invention having the form shown in FIG. 2 can have an undercoat layer (not shown), if necessary.

That is, in the case of an electrophotographic photoreceptor having the form shown in FIG.
2.

The charge generation layer 102 and the surface layer (ii) have the form shown in FIG.
In electrophotographic photoreceptors having the fj transport layer 103, the thickness of both layers is one of the important requirements for the electrophotographic photoreceptors to exhibit desired electrophotographic properties. That is, the charge generation layer 102 preferably has a thickness of 0.01
The layer thickness is between 5 μm and more preferably between 0.05 and 2 μm, and! The cargo transport layer 103 preferably has a thickness of 4 to 30 am.
, more preferably a layer thickness of 7 to 20 μm.

Further, when a subbing layer is provided on the electrophotographic photoreceptor, the layer thickness is preferably 4 to 30 μm, more preferably 7 to 20 IJm.

! Contain it in the load generation layer 102! The known organic t? An i-generating material or a known inorganic charge-generating material can be used. Specific examples of such organic charge generating substances include azo pigments, phthalocyanine pigments, anthoanthrone pigments, quinone pigments, pyranthrone pigments,
Examples include indigo pigments, quinacridone pigments, and pyrylium pigments. Similarly, specific examples of inorganic charge generating substances include selenium, selenium-tellurium, selenium-arsenic, and the like.

The charge generating layer 102 can be formed by depositing the charge generating substance in 1 by a known method, or by preparing a coating liquid containing the charge generating substance, applying the coating liquid, and drying and solidifying the coating liquid. can. Among these three methods, the latter method is more preferable, that is, according to the latter method, the charge generating substance can be easily distributed in the desired state in the formed charge generating layer. The specific content of the latter method is to use a suitable dispersion medium and to use the above-mentioned method together with the dispersion medium. Introducing a charge-generating substance into a suitable solvent to prepare a coating liquid in which the charge-generating substance is uniformly dispersed, applying this to form a liquid coat, and drying and solidifying the liquid coat. fl
The i generation layer 102 is shaped.

Desirable examples of the dispersion medium include so-called binder resins such as insulating resins and organic photoconductive polymers. Specific examples of such binder resins include polyvinyl butyral, polyvinyl benzal, and polyvinyl benzal.
, polycarbonate, polyester, phenokine resin,
Examples include cellulose resin, acrylic resin, and polyurethane. In addition to these, if necessary,
The polysilane used in the present invention can also be used as the dispersion medium. In either case, the amount of dispersion medium used depends on the amount of charge ordering layer 102 that is finally formed.
It is desirable that the content (weight ratio) is preferably 80% by weight or less, more preferably 40% by weight or less.

Moreover, as the above-mentioned solvent, the above-mentioned binder resin is melted, and the above-mentioned! A solvent is selectively used that causes the charge-generating material to be uniformly dispersed in the dissolved binder resin. Specific examples of such solvents include, for example, ethers such as tetrahydrofuran and 1,4-dioxane; ketones such as dichlorohexanone and methyl ethyl ketone; amides such as N,N-dimethylformamide; methyl acetate and acetic acid. Esters such as ethyl: Aromatics such as toluene, xylene, and chlorobenzene; Alcohols such as methanol, ethanol, and 2-propanol; Aliphatic halogens such as chloroform, methylene chloride, dichloroethylene, carbon tetrachloride, and trichlorethylene. Examples include hydrogenated hydrocarbons.

Any known appropriate coating method can be used to form a liquid coat by applying the above-mentioned coating liquid. Such coating methods include wire bar coating method, dipping method, Dr.Frede method, spray method, roll method, bead method, spin coating method, and the like.

In addition, for drying and solidifying the formed liquid coat, a drying and solidifying method that does not damage the charge generation layer 10 to be formed, such as a known air drying method, can be used.

The surface layer (fi transport layer) 103 containing the above-mentioned polynolane compound can be formed by the same method as in the case of the above-mentioned charge generation J5102. That is, for the surface layer (charge transport layer), a coating liquid is prepared by dissolving polysilane in an I solvent, preferably 5 to 30% by weight, more preferably 10 to 201% by weight, based on the solvent. This can be applied to form a liquid coat, and the liquid coat can be dried and solidified to form a lump. Examples of the solvent include aromatic solvents such as benzene, toluene, and xylene, dichloromethane, dichloroethane, and chloroform. In addition to these solvents, examples thereof include tetrahydrofuran, dioxane, etc. Application of the coating liquid and drying and solidification of the liquid coat can be performed in the same manner as in the formation of the charge generation layer 102.

When the above-mentioned subbing layer is provided on an electrophotographic photoreceptor, the layer thickness is preferably 4 to 30 μm, more preferably 7 to 20 μm.

The subbing layer is made of casein, polyvinyl alcohol, nitrocellulose, polyamide (nylon 6, nylon 66,
It is made of an appropriate material selected from the group consisting of nylon 610, copolymerized nylon, alkoxymethylated nylon, etc.), polyurethane, and aluminum oxide. Formation of the undercoat layer can be carried out by dissolving the undercoat layer material in a suitable solvent to prepare a coating liquid, if the material for the undercoat layer is soluble in a solvent;
In addition, if the material is insoluble in the solvent, it is dispersed in a binder resin solution to prepare a coating liquid,
This is carried out by coating the surface of the conductive support 101 with the obtained coating liquid in the same manner as in the case of forming the photosensitive layer described above to form a liquid coat, which is then dried and solidified.

Conductive support 101 of electrophotographic photoreceptor used in the present invention
I will explain about it. First, regarding the shape, it can be any shape such as a cylinder, a belt, or a plate. Next, regarding the constituent materials, the entire member may be electrically conductive, or the base may be an insulating member and the surface on which the light-receiving layer is provided may be electrically conductive.

Specific examples of the former case include metal members such as aluminum, copper, and zinc, and alloys such as aluminum alloys and stainless steel. For the latter case, polyethylene, polypropylene, polyvinyl chloride,
A member in which the above-mentioned metal coating is formed on the surface of a plastic base member such as polyethylene terephthalate or acrylic resin by a known vacuum bonding method, and titanium oxide, tin oxide, carbon brane, etc. are coated on the surface of the plastic base member.
Examples include a member in which conductive particles such as silver are coated with a suitable binder resin, and a member in which an impregnable heath member such as paper or plastic is impregnated with the conductive particles. In addition to these members, a member obtained by coating the surface of a suitable metal heath member with the above-mentioned conductive particles using a suitable binder resin can also be used as the above-mentioned conductive support.

In addition, in any of the electrophotographic photoreceptors shown in FIGS. 1 and 2 described above, the following 1.
When forming a layer, it is important to select and use a solvent that does not dissolve the previously formed constituent layer.

Next, borinran used in the present invention will be explained in detail.

The polysilane used in the method of the present invention is represented by the following general formula (+).

R1Rs □÷Si-→Co'--+Si-→-r--(1)Ra R4 [In the formula, R1 is an alkyl group having 1 or 2 carbon atoms, R
2 is an alkyl group having 3 to 8 carbon atoms, a socroalkyl group,
Rx is an alkyl group having 1 to 4 carbon atoms, R1 is an alkyl group having 1 to 4 carbon atoms, and X and Y are each monomer unit in the polymer. It is a number that indicates a number. ] The polysilane represented by the general formula (1) is described in The Journal of Organometallic Chemistry (The
Journal of Organometallic
Che + uistry).

198pp, C27 (1980) or The Journal
Of Polymer Science 1 Polymer Chemistry Edition
polymerScience, Polymer C
hemistry Edition) Vol, 22
．． 159-170pp, (+984), etc.

Examples of the polysilane represented by the general formula (1) used are shown below.

a et al. Silma -1 CH.

■ -fsitoY -2 01go fSih -3 Of fl 3) I CH3 fSi11 01! -CI(2i,■ -4 CH3CH3 Lee Si Te “Go Si”rv -5 01ff0+.

I Si Te' 2 Si Te T -7 0130f s 1 f 5 + Te' Pi Si Te T -8 13 应 s (Oz') ,C)13 ] -fO5i teY→S1teT -6 In the present invention, the following general formula (It) is particularly preferably
A polysilane represented by is used.

R+ Rz A −←−5i−＋Goー←Si−→1− A′ ・
・(Il)R2Ra (However, R3 to R are each represented by the above-mentioned general formula (1)
It represents the same thing as R8 to R4 in .

A and A' are each an alkyl group, cycloalkyl group, aryl group, or aralkyl group having 4 to 12 carbon atoms, and may be the same or different. It is a number indicating the number of seven units of each of . ) It will be described below that the porinrane represented by the general formula (II) which is particularly preferably used in the present invention is objectively distinguished from the polysilane represented by the above-mentioned general formula (+).

That is, the polysilane compound represented by -a formula (1) is -
A.2. As mentioned above, the dichlorosilane monomer is used as a starting material, and since it is obtained by detranslating the halogen from the monomer using an Na catalyst and polymerizing it, there is no halogen residue. Most have a group at the end.

When such conventional polysilane compounds containing halogen residues are used as constituent materials of the light-receiving layer of electrophotographic photoreceptors, the resulting electrophotographic photoreceptors have the following problems. That is, when it is used to form an image, the halogen residue acts as a barrier to charge transfer, resulting in a residual 8-position. Further, when repeatedly charging and exposing to light, the residual potential increases and the bright area potential increases accordingly, resulting in poor durability. In addition to these problems there are also other problems. That is, when the halogeno residue of the polysilane compound containing the halogeno residue constituting the photoreceptor is a C group, if moisture is present, the ce group reacts with the moisture to form hydrogen chloride gas (HCf). This causes corrosion of the conductive portion of the electrophotographic photoreceptor substrate in contact with the photoreceptive layer, resulting in poor conductivity and resulting in image defects.

On the other hand, III particularly preferably used in the present invention
The polysilane represented by the Q formula (It) is specified by not having a halogen group, does not involve side reactions, is easily soluble in a 4Ii solvent, and can be completely dissolved without turbidity. It is characterized by having excellent film-forming ability and making the resulting film transparent without local defects.

-S The polysilane represented by formula (II) does not have any chlorine groups or groups that produce side reactions, and all Si groups are substituted with specific oxygen-free organic groups, and is nontoxic. ,
Aromatic solvents such as toluene, benzene, xylene, halogenated solvents such as dichloromethane, dichloroethane, chloroform, carbon tetrachloride, and other tetrahydrofuran (T
It is easily soluble in solvents such as HF) and dioxane, and has excellent film-forming ability. The film formed using the polysilane compound is homogeneous and has a uniform thickness, has excellent copper heat resistance, hardness of 22, and toughness (
It is rich in toughness.

-a The polysilane compound represented by formula (II) has a weight average molecular weight of 6,000 to 200,000, but from the viewpoint of solubility in a solvent and film forming ability, more preferable ones are: Weight average molecular weight is 8,00
The weight average molecular weight is 0 to 120,000, and the most suitable weight average molecular weight is 10,000 to so, ooo.

Regarding the weight average molecular weight, those with a weight average molecular weight of 6.000 or less do not exhibit the characteristics of polymers and have no film-forming ability, and those with a weight average molecular weight of 20,000 or more have poor solubility in solvents. , it is difficult to form the desired film.

In addition, polysilane represented by the formula -11 (1) is used when the film to be formed is particularly desired to be tough, in which the terminal groups A and A' are an alkyl group having 5 to 12 carbon atoms, 5 to 12 carbon atoms]2 The group is preferably selected from the group consisting of a cycloalkyl group, an aralkyl group, and an aralkyl group.

The most preferred polysilane in this case is the terminal groups A and A.
' is a group selected from an alkyl group having 5 to 12 carbon atoms and a cycloalkyl group having 5 to 12 carbon atoms.

Borinlan represented by general formula (II) can be synthesized as follows. That is, under a high-purity inert atmosphere free of oxygen and moisture, a dichlorosilane monomer is brought into contact with a condensation catalyst made of an alkali metal to perform halogen elimination and condensation polymerization to synthesize an intermediate polymer. The intermediate polymer is separated from unreacted hexamer, and the intermediate polymer is reacted with a predetermined halogenated organic reagent in the presence of a condensation catalyst consisting of an alkali metal to form a polymer at the terminal end of the polymer. Synthesized by condensing groups.

In the above synthesis operation, the dichlorosilane monomer as the starting material, the intermediate polymer, the halogenated organic reagent, and the alkali metal condensation catalyst are all highly reactive with oxygen and moisture, so these oxygen and moisture are present. Under such an atmosphere, the desired polysilane compound described above cannot be obtained.

Therefore, the above-mentioned operation for obtaining the above-mentioned porinlan compound used in the present invention needs to be carried out in an atmosphere in which neither oxygen nor moisture is present. For this reason, care must be taken regarding the reaction vessel and all reagents used to ensure that neither oxygen nor moisture is present in the reaction system.1 For example, the reaction vessel must be vacuum-suctioned and argon gassed in a blow box. Perform substitution to prevent adsorption of moisture and oxygen into the system. In any case, the argon gas used is previously passed through a silica gel column to dehydrate it, and then the copper powder is passed through a column heated to 100° C. for deoxidation treatment.

The dichlorosilane monomer as a starting material is introduced into the reaction system after being distilled under reduced pressure using the above-mentioned argon gas which has been deoxygenated immediately before introduction into the reaction system.

Specific existence! The above-mentioned halogenated organic reagent for introducing the group and the above-mentioned solvent used are also introduced into the reaction system after being subjected to the deelination treatment in the same manner as the cyclolonlane monomer. Note that the solvent is deoxidized by distilling it under reduced pressure using the deoxygenated argon gas described above, and then further dehydrating it with metallic sodium.

The above condensation catalyst is used in the form of wires or chips, and the wires or chips are M-free.
Use in a pure paraffinic solvent to prevent oxidation.

The dichlorosilane monomer as a starting material used in producing the polysilane compound represented by the above general formula (1) used in the present invention has the general formula: RIR2SiC
A silane compound represented by N, or this and general 2: R
A silane compound represented by 3R4SiC12g is selected about 4
This is used.

As the above-mentioned condensation catalyst, an alkali metal capable of causing a condensation reaction by eliminating halogen is preferably used, and specific examples of the alkali metal include lithium, sodium, and potassium, with lithium and sodium being preferred.

The above-mentioned halogenated organic reagents are 2 represented by A and A'.
A suitable compound for introducing the m group selected from the group consisting of halogenated alkyl compounds, halogenated cycloalkyl compounds, halogenated aryl compounds and halogenated aralkyl compounds, that is, general formula: A
-X and/or the general formula: A'-X (where X is CI or Br), and an appropriate compound among the specific examples described below is selectively used.

General formula used in synthesizing the above intermediate polymer: R, R to S i Cl or this and general formula: R
,R,5iCi! The dichlorosilane monomer represented by is dissolved in a predetermined solvent and introduced into the reaction system,
As the solvent, a paraffinic nonpolar hydrocarbon solvent is preferably used. Preferred examples of the solvent include n
-hexane, n-octane, n-nonane, n-dodecane, cyclohexane and cyclooctane.

Since the resulting intermediate polymer is insoluble in these solvents, it is convenient to separate the intermediate polymer from unreacted dichlorosilane monomer. The separated intermediate polymer is then reacted with the above-mentioned halogenated organic reagent, in which case both are dissolved in the same solvent and subjected to the reaction. In this case, aromatic solvents such as benzene, toluene, and xylene are preferably used as the solvent.

When condensing the above-mentioned dichlorosilane monomer using the above-mentioned alkali metal catalyst to obtain a desired intermediate, the degree of polymerization of the resulting intermediate polymer can be appropriately controlled by adjusting the reaction temperature and reaction time. . However, the reaction temperature at that time is preferably set between 60°C and 130°C.

A desirable embodiment of the method for producing the above-mentioned borinlan compound represented by general formula (II) will be described below.

That is, the method for producing the above-mentioned polysilane compound used in the present invention consists of (i) a step of producing an intermediate polymer, and (ii) a step of introducing substituents A and A' at the terminals of the intermediate polymer. .

The step (1) above is performed as follows.

That is, the reaction system in the reaction vessel is completely free of oxygen and moisture and is dominated by argon and maintained at a predetermined internal pressure.
Add an oxygen-free paraffinic solvent and an oxygen-free condensation catalyst,
Next, an oxygen-free dichlorosilane monomer is added, and the whole is heated to a predetermined temperature while stirring to effect condensation of the monomer. At this time, the degree of condensation of the cyclolonlane monomer is
The reaction temperature and reaction time are adjusted 5 to produce an intermediate polymer with the desired degree of polymerization.

In this reaction, as shown in the following reaction formula, the chloro group of the C dichlorosilane monomer and the catalyst cause a desalting reaction, and the 31 groups repeat condensation to form a polymer, producing an intermediate polymer. .

Catalyst nRIRl 5IC12z +mR1R15IC1x
-R,R.

C1-←S1 2,, 1. -51-Y5-C
l... (1) 2 4 The specific reaction procedure here is to prepare the zeta condensation catalyst (alkali metal) in a paraffinic solvent, and dropwise add the dichlorane monomer while stirring under pressure. Add. The degree of polymerization is confirmed by sampling the reaction solution.

Simple confirmation of polymerization can be determined by whether or not a film can be formed by volatilizing the sampling liquid.

As the condensation progresses and a polymer is formed, it becomes a white solid that precipitates out of the reaction system. Here, it is cooled, and the solvent containing the monomer is separated from the reaction system by decantation to obtain an intermediate polymer.

Next, the process in step (2) above is performed. That is, the chlorine group at the terminal group of the obtained intermediate polymer is subjected to desalting condensation using a halogenated organic agent and a condensation catalyst (alkali metal), and the polymer terminal group is substituted with a predetermined m group. The reaction at this time is represented by the following reaction formula (ii>).

R,R.

C1---851-+-V----11 "→ko, ClR
2RJ Catalyst 4-(2A-XorA-X+A'-X)□R1R1 8-Chapter Tonako--1,000-5i-+1-A' ・
... (11>R2R- Specifically, an aromatic solvent is added to the intermediate polymer obtained by condensation of dichlorosilane monomer and dissolved. Next, a condensation catalyst (alkali metal) is added, and the halogen is dissolved at room temperature. At this time, to compete with the condensation reaction between polymer end groups, add a halogenated organic agent in an excess amount of 0.0 to 0.1 times the starting mass. Gradually heat. Then, heat and stir at 80°C to 10°C (1°C) for 11 hours to carry out a macroscopic reaction.

After the reaction is completed, the mixture is cooled and methanol is added to remove the alkali metal of the catalyst. Next, the generated polysilane compound is extracted with toluene and purified using a silica gel column. The desired polysilane compound used in the present invention is thus obtained.

(Space below) Specificity of R, R2SiC12 and R, R, S+C12):
Among the following compounds, b-2 to 16.1B, 20.212
3.24 is used for R+1hSiCi, b-12
, 11, 17, 19, 22, 23, 25 are R, II, s
Used for iC1.

(CHs)zs:Cat
b −1C)+3 (CHz) + 11, . 5iC1z GHz ” 11, b-Hinoki 'rCH2CH1, -') SiCl z C)13 -14 CH:+(C)it)s, ゝ-5ilJz C)1.' 2H5 ゝ;5i(Jz CHs -16 -17 (CJh) 3CCI+2, 〉5IC12 CI'+3' -18 ((C)+3) ro() zstc 12 tb-na (ToC7I CH8≦nC1 /F\C)I gog, -cz ◎4 )C1 ((013) 3C) zsic i.

A-X and A'-X tool 1 (CH:+) 2C rudder 1. (J C) Iff (CH2) 4CJ Carp 3 (Olz) sC1 0h (C) 12> 1゜CZ \-゛ce cg-, < knee c1 b-rudeto α, (J X-・', 7・-\ 1, (===; ≧, y-(c)12n, CI!% (0
12) 5Br CHz(C)l□)+oBr 2 3 4 5 <>Br \-/ 6 3, 8°-17 As the catalyst, an alkali metal is preferable.

Lithium, sodium, and potassium are used as alkali metals. It is preferable that the shape is wire-like or square-shaped to increase the surface area, and specific examples of the borinolane represented by the general formula (n) are shown below.

side.

(2) s (Glt) s + Si - TO T bar Tsukuda JsObJs 01゜11 JI: + ((J!z) s- + Si 3-T- (Oh
)sOh0 CH.

(7).

(CHJ sCH5i trC(Oh) )CH3(0
1-) 1- +S+ +7-(012) 16CH3
]1 -Si'jxko' 2 C1+(Ol3)t 013 shi7'' 113 CL (012) s-4Si +-r-(CH2)
, ob8 CH(CHz)z CH3 Ol.

Song, (CH2)〆→Si )-T-(Si ト``(CH
□)4(2).

d-necessary 13 a et al. 13 01! 01:I(012)4-(Si←r]Si'j-r
-(CH□)aOIxd-branch C1l, a.

Cf13(CHz)s-(Si +T-+C5i h"
(Oh)s song.

()CHl ・、－ノ d-illusion CH,C)I.

C) I3 CHl Oh (Olz) + o いSi te ``piSito'' (listening 2) 1
゜C11.

”(]CH・d- ari(CH3)2CHC)lr(SiyaT”SitevC
)IZc)l(CH3)2d-Resistance to CI.

Cll.

CH ko Di)s 0゜013 (012) 3 CH3 (012) z i Size ``I Si ト'' (2), (2).

d-ω C) 13 Note) 2 In the above structural formula, both X and Y represent monomer polymerized units, and the copolymer represents a random polymer.

The long-wavelength absorption edges of the above-mentioned borinlans used in the method of the present invention are all in the range of 325 to 350 nm, and the wavelength of light reaching the photoreceptor surface from the above-mentioned light source used for light irradiation is 325 to 350 nm.
Since the diameter is 10 nm or more, polysilane decomposes upon irradiation with light.

In addition, as the cleaning blade used in the method of the present invention, urethane rubber, chloroprene rubber, EPM
Examples include rubber blades made of rubber, EPDM rubber, butane rubber, butyl rubber, etc., and urethane rubber blades are particularly preferably used.

〔Example〕

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

Otsuki Group-1- A photoreceptor was produced by the following method. First, the outer diameter is 80fi,
Thickness], 1n, length 360n aluminum laminate
Next, as a coating liquid for the charge generation layer, 10 parts by weight (hereinafter referred to as "parts") of chloraluminum fuchronoania and 5 parts of polyvinyl butyral were dispersed in 190 parts of MEK using a ball mill, and the coating solution was coated by a dipping method to form a 0.2 μm layer. A charge generation layer was provided.

ii! A polysilane layer having a thickness of 12 .mu.m was formed by dissolving borinlane represented by the formula d-2 in tonolenin and coating it on the load-generating layer by a coating method to form a photoreceptor.

This electrophotographic photoreceptor was prepared at 32° C. and 95% RH using a copier model NP-3525 manufactured by Canon Co., Ltd. (light source wavelength range: 300 nm or more: urethane rubber cleaning blade load adjusted to 0.5 g/■). Under the environment of 10
When I did a durability test of 0.000 sheets, it was 100.0.
Even after the durability test of 00 sheets, it was possible to obtain images of the same high quality as the initial image.

A photoreceptor was prepared in exactly the same manner as in Example 1, and a copying machine model NP-3525 manufactured by Canon Co., Ltd. was used in Example 1.
A short wavelength cant filter (545
When a durability test was conducted in the same manner as in Example 1, except for using a modified version of Strive Coat A, white streak-like unevenness occurred in the center of the image from around 1,000 sheets. However, at the time of 2,000 sheets, white streak-like unevenness had spread over the entire image, making it impossible to decipher the text. (Image deletion occurred.) A charge generation layer was provided in the same manner as in Example 1, and then Borinran d-18, d-12, d-3, H22, and d-34 were used. A polysilane layer was provided and photoreceptor fish 2 to 6 were prepared and evaluated in the same manner as in Example 1, and the results are shown in Table 1.

The same photoreceptors as NQ2-6 used in Examples 2-6 were evaluated in the same manner as in Comparative Example 1, and the results are shown in Table 1.

Polysilane M 8 PI3 C)13(C)I□)s! Si←−(0□), α.

CH(CHs)t If CH8 Ct+.

[] 0°J,, 306 nm A,, x N) 4 nm Table [Summary of the effects of the invention] The method of the present invention can be used in an electrophotographic method using an electrophotographic photoreceptor containing polysolane in the surface layer. By irradiating light with a wavelength that can be absorbed by the borinlan, it is possible to prevent image blurring during durability.

Furthermore, by using a cleaning blade with a load of log/cm or more, the effect on image deletion can be made more significant.

4. Pli of drawings! Brief Description FIG. 1 is a sectional view of a laminated photoreceptor used in the method of the present invention.

10j... Conductive support, +02... Charge generation layer,
]03...Surface layer containing porinlan (charge transport layer)

Claims (2)

[Claims] (1) An electrophotographic method using an electrophotographic photoreceptor containing polysilane in its surface layer, which comprises irradiating light containing light that can be absorbed by the polysilane used. (2) The electrophotographic method according to claim (1), characterized in that a cleaning blade with a load of 10 g/cm or more is used.