JPH04281461A - Electrophotographic sensitive material - Google Patents

Electrophotographic sensitive material

Info

Publication number
JPH04281461A
JPH04281461A JP6906691A JP6906691A JPH04281461A JP H04281461 A JPH04281461 A JP H04281461A JP 6906691 A JP6906691 A JP 6906691A JP 6906691 A JP6906691 A JP 6906691A JP H04281461 A JPH04281461 A JP H04281461A
Authority
JP
Japan
Prior art keywords
group
substituted
formula
electrophotographic photoreceptor
alkyl group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6906691A
Other languages
Japanese (ja)
Other versions
JP3286711B2 (en
Inventor
Shinji Nosho
伸二 納所
Mitsuru Seto
瀬戸 満
Setsu Rokutanzono
節 六反園
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP06906691A priority Critical patent/JP3286711B2/en
Publication of JPH04281461A publication Critical patent/JPH04281461A/en
Application granted granted Critical
Publication of JP3286711B2 publication Critical patent/JP3286711B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To obtain an electrophotographic sensitive material which shows excellent mechanical strength, significantly small residual potential in a copy machine and small variation against enviromental conditions, and gives picture of high quality for a long period. CONSTITUTION:The electrophotographic sensitive material consists of a conductive supporting body and photoconductive layer and surface protective layer successively deposited on the supporting body. The surface protective layer contains a hole carrier material and binder resin with dispersion of metal or metal oxide fine powder. The hole carrier material is, for example, 4- methoxybenzaldehyde, 1-methyl-1-phenylhydrazone, 9-ethylcarbazole-3-aldehyde, 1-methyl-1-phenylhydrazone, etc.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は表面保護層を有する電子
写真用感光体に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photoreceptor having a surface protective layer.

【0002】0002

【従来の技術】従来、電子写真感光体としては、導電性
支持体上にセレンないしセレン合金を主体とする光導電
層を設けたもの、酸化亜鉛、酸化カドミウムなどの無機
光導電材料をバインダー中に分散させたもの、ポリ−N
−ビニルカルバゾールとトリニトロフルオレノンあるい
はアゾ顔料などの有機光導電材料を用いたもの及び非晶
質シリコンを用いたもの等が一般に知られている。これ
らの感光体に対して、長時間高画質を保つ信頼性の要求
が年々高まっている。しかし光導電層が露出している場
合、帯電過程のコロナ放電による損傷と複写プロセスで
受ける他部材との接触による物理的あるいは化学的な損
傷が感光体の寿命を損なうものであった。
[Prior Art] Conventionally, electrophotographic photoreceptors have been prepared by providing a photoconductive layer mainly made of selenium or a selenium alloy on a conductive support, or by using an inorganic photoconductive material such as zinc oxide or cadmium oxide as a binder. Poly-N
- Those using organic photoconductive materials such as vinyl carbazole and trinitrofluorenone or azo pigments, and those using amorphous silicon are generally known. For these photoreceptors, the demand for reliability that maintains high image quality for a long period of time is increasing year by year. However, when the photoconductive layer is exposed, damage caused by corona discharge during the charging process and physical or chemical damage caused by contact with other members during the copying process impair the life of the photoreceptor.

【0003】このような欠点を解消する方法として感光
体表面に保護層を設ける技術が知られている。具体的に
は感光層の表面に有機フィルムを設ける方法(特公昭3
8−15446)、無機酸化物を設ける方法(特公昭4
3−14517)、接着層を設けた後、絶縁層を積層す
る方法(特公昭43−27591)、あるいはプラズマ
CVD法・光CVD法等によってa−Si層、a−Si
:N:H層、a−Si:O:H層等を積層する方法(特
開昭57−179859、特開昭59−58437)が
開示されている。しかしながら、保護層が電子写真的に
高抵抗(1014Ω・cm以上)になると、残留電位の
増大、繰返時の蓄積などが問題となり、実用上好ましく
ない。
[0003] As a method for eliminating such drawbacks, a technique is known in which a protective layer is provided on the surface of the photoreceptor. Specifically, a method of providing an organic film on the surface of the photosensitive layer (Japanese Patent Publication No. 3)
8-15446), method of providing inorganic oxide (Special Publication No. 4
A-Si layer, a-Si
:N:H layer, a-Si:O:H layer, etc. have been disclosed (Japanese Patent Laid-Open Nos. 57-179859 and 59-58437). However, if the protective layer becomes electrophotographically high in resistance (10<14 >Ω·cm or more), problems such as an increase in residual potential and accumulation during repetition will arise, which is not preferred in practice.

【0004】上記欠点を補う技術として保護層を光導電
層とする方法(特公昭48−38427、特公昭43−
16198、特公昭49−10258、USP−290
1348)、保護層中に色素やルイス酸に代表される移
動剤を添加する方法(特公昭44−834、特開昭53
−133444)、或いは金属や金属酸化物微粒子の添
加により保護層の抵抗を制御する方法(特開昭53−3
338)等が提案されている。しかし、このような場合
には保護層による光の吸収が生じ光導電層へ到達する光
量が減少するため、結果として電子写真用感光体の感度
が低下するという問題が生じる。
[0004] As a technique to compensate for the above-mentioned drawbacks, a method of using a photoconductive layer as a protective layer (Japanese Patent Publication No. 48-38427, Japanese Patent Publication No. 43-1982)
16198, Special Publication Showa 49-10258, USP-290
1348), a method of adding a transfer agent such as a dye or a Lewis acid to the protective layer (Japanese Patent Publication No. 44-834, Japanese Patent Application Laid-Open No. 1987-53
-133444), or a method of controlling the resistance of the protective layer by adding metal or metal oxide fine particles (JP-A-53-3)
338) etc. have been proposed. However, in such a case, the protective layer absorbs light and the amount of light reaching the photoconductive layer decreases, resulting in a problem that the sensitivity of the electrophotographic photoreceptor decreases.

【0005】この様な観点から特開昭57−30846
に開示されているように平均粒径0.3μm以下の金属
酸化物微粒子を抵抗制御剤として表面保護層中に分散さ
せることにより、可視光に対して実質的に透明にする方
法がある。この表面保護層をもった電子写真用感光体は
感度低下も少なく、表面保護層の機械的強度も増し、耐
久性が向上する。しかしながら、この感光体を実際の複
写機に組み込んだ場合、残留電位が生じ画像上に地肌汚
れを発生させるという欠点がある。この残留電位は表面
保護層上に蓄積した残留電荷により発生し、特に低温低
湿時に著しく増大する。
From this point of view, Japanese Patent Application Laid-Open No. 57-30846
There is a method of making the surface substantially transparent to visible light by dispersing metal oxide fine particles having an average particle size of 0.3 μm or less as a resistance control agent in the surface protective layer, as disclosed in . An electrophotographic photoreceptor having this surface protective layer exhibits little decrease in sensitivity, increases the mechanical strength of the surface protective layer, and improves durability. However, when this photoreceptor is incorporated into an actual copying machine, there is a drawback that a residual potential is generated, causing background stains on the image. This residual potential is generated by residual charges accumulated on the surface protective layer, and increases significantly especially at low temperature and low humidity.

【0006】[0006]

【発明が解決しようとする課題】本発明はこうした実情
に鑑み、高い機械的強度を備えかつ低湿時に残留電位の
増加を生じない安定な電気特性を示す保護層を有し、長
期に渡って品質の高い画像を安定して形成しうる電子写
真用感光体を提供することを目的とする。
[Problems to be Solved by the Invention] In view of these circumstances, the present invention has a protective layer that has high mechanical strength and exhibits stable electrical properties that do not cause an increase in residual potential at low humidity. An object of the present invention is to provide an electrophotographic photoreceptor that can stably form images with high image quality.

【0007】[0007]

【課題を解決するための手段】本発明は、導電性支持体
上に光導電層及び表面保護層を順次積層した電子写真用
感光体において、表面保護層が金属あるいは金属酸化物
微粉末を結着樹脂中に分散させた層からなり、かつ正孔
搬送物質を含有させたことを特徴とするものであり、該
正孔搬送物質として、例えば次に示す化1〜化13で表
わされる化合物を用いることを特徴とするものであり、
また、該正孔搬送物質と該結着樹脂との重量比が1:9
9〜50:50であることを特徴とするものである。
[Means for Solving the Problems] The present invention provides an electrophotographic photoreceptor in which a photoconductive layer and a surface protective layer are sequentially laminated on a conductive support, in which the surface protective layer binds metal or metal oxide fine powder. It is characterized by comprising a layer dispersed in a binder resin and containing a hole transporting substance, and as the hole transporting substance, for example, compounds represented by the following chemical formulas 1 to 13 are used. It is characterized by the use of
Further, the weight ratio of the hole transport substance and the binder resin is 1:9.
The ratio is 9 to 50:50.

【0008】[0008]

【化1】 〔式中、R1はアルキル基、ベンジル基、フェニル基を
表わし、R1は水素、炭素数1〜3のアルキル基、炭素
数1〜3のアルコキシ基、ジアルキルアミノ基、ジアラ
ルキルアミノ基またはジアリールアミノ基を表わし、n
は1〜4の整数を表わし、nが2以上のときR2は同じ
でも異なっていてもよい。R3は水素またはメトキシ基
を表わす。〕
[Formula 1] [In the formula, R1 represents an alkyl group, a benzyl group, or a phenyl group, and R1 is hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a dialkylamino group, or a dialkylamino group. group or diarylamino group, n
represents an integer of 1 to 4, and when n is 2 or more, R2 may be the same or different. R3 represents hydrogen or a methoxy group. ]

【0009】[0009]

【化2】 〔式中、R1はメチル基、エチル基、2−ヒドロキシエ
チル基又は2−クロルエチル基を表わし、R2はメチル
基、エチル基、ベンジル基又はフェニル基を表わし、R
3は水素、塩素、臭素、炭素数1〜4のアルキル基、炭
素数1〜4のアルコキシ基、ジアルキルアミノ基又はニ
トロ基を表わす。〕
[Formula, R1 represents a methyl group, ethyl group, 2-hydroxyethyl group or 2-chloroethyl group, R2 represents a methyl group, ethyl group, benzyl group or phenyl group, R
3 represents hydrogen, chlorine, bromine, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group, or a nitro group. ]

【0010】0010

【化3】 〔式中、Arはナフタリン環、アントラセン環、スチリ
ル基及びそれらの置換体あるいはピリジン環、フラン環
、チオフェン環を表わし、Rはアルキル基又はベンジル
基を表わす。〕
embedded image [In the formula, Ar represents a naphthalene ring, an anthracene ring, a styryl group, or a substituted product thereof, or a pyridine ring, a furan ring, or a thiophene ring, and R represents an alkyl group or a benzyl group. ]

【0011】[0011]

【化4】 〔式中、A1,A2は置換もしくは無置換のアルキル基
又は置換もしくは無置換のアリール基を表わし、それぞ
れ同一でも異なっていてもよい。Arは置換または無置
換の縮合多環式炭化水素基を表わす。〕
embedded image [In the formula, A1 and A2 represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, and may be the same or different. Ar represents a substituted or unsubstituted condensed polycyclic hydrocarbon group. ]

【0012】0012

【化5】 〔式中、R1,R3及びR4は水素原子、アミノ基、ア
ルコキシ基、チオアルコキシ基、アリールオキシ基、メ
チレンジオキシ基、置換もしくは無置換のアルキル基、
ハロゲン原子又は置換もしくは無置換のアリール基を、
R2は水素原子、アルコキシ基、置換もしくは無置換の
アルキル基又はハロゲンを表わす。kは1〜5の整数、
lは1〜4の整数、mは1〜5の整数、nは1〜5の整
数である。〕
[Formula 5, R1, R3 and R4 are hydrogen atoms, amino groups, alkoxy groups, thioalkoxy groups, aryloxy groups, methylenedioxy groups, substituted or unsubstituted alkyl groups,
A halogen atom or a substituted or unsubstituted aryl group,
R2 represents a hydrogen atom, an alkoxy group, a substituted or unsubstituted alkyl group, or a halogen. k is an integer from 1 to 5,
l is an integer of 1 to 4, m is an integer of 1 to 5, and n is an integer of 1 to 5. ]

【0013】[0013]

【化6】 〔式中R1は水素、ハロゲン、シアノ基、炭素数1〜4
のアルコキシ基または炭素数1〜4のアルキル基を表わ
し、Arは R2は炭素数1〜4のアルキル基を表わし、R3は水素
、ハロゲン、炭素数1〜4のアルキル基、炭素数1〜4
のアルコキシ基またはジアルキルアミノ基を表わし、n
は1または2であって、nが2のときはR3は同一でも
異なってもよく、R4およびR5は水素、炭素数1〜4
の置換または無置換のアルキル基あるいは置換または無
置換のベンジル基を表わす。〕
[Formula R1 is hydrogen, halogen, cyano group, carbon number 1-4
represents an alkoxy group or an alkyl group having 1 to 4 carbon atoms, Ar is R2 represents an alkyl group having 1 to 4 carbon atoms, and R3 is hydrogen, halogen, an alkyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms.
represents an alkoxy group or dialkylamino group, n
is 1 or 2, and when n is 2, R3 may be the same or different, R4 and R5 are hydrogen, and have 1 to 4 carbon atoms.
represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted benzyl group. ]

【0014】[0014]

【化7】 〔式中、R1は炭素数1〜11のアルキル基、置換もし
くは無置換のフェニル基又は複素環基を表わし、R2,
R3はそれぞれ同一でも異なっていてもよく水素、炭素
数1〜4のアルキル基、ヒドロキシアルキル基、クロル
アルキル基、置換または無置換のアラルキル基を表わし
、また、R2とR3は互いに結合し窒素を含む複素環を
形成していてもよい。R4は同一でも異なっていてもよ
く水素、炭素数1〜4のアルキル基、アルコキシ基又は
ハロゲンを表わす。〕
[In the formula, R1 represents an alkyl group having 1 to 11 carbon atoms, a substituted or unsubstituted phenyl group, or a heterocyclic group, R2,
R3 may be the same or different and each represents hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group, a chloroalkyl group, a substituted or unsubstituted aralkyl group, and R2 and R3 are bonded to each other and represent nitrogen. may form a heterocycle containing. R4 may be the same or different and represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group, or a halogen. ]

【0015】[0015]

【化8】 〔式中、Rはカルバゾリル基、ピリジル基、チエニル基
、インドリル基、フリル基或いはそれぞれ置換もしくは
無置換のフェニル基、スチリル基、ナフチル基またはア
ントリル基であって、これらの置換基がジアルキルアミ
ノ基、アルキル基、アルコキシ基、カルボキシ基または
そのエステル、ハロゲン原子、シアノ基、アラルキルア
ミノ基、N−アルキル−N−アラルキルアミノ基、アミ
ノ基、ニトロ基およびアセチルアミノ基からなる群から
選ばれた基を表わす。〕
[Formula 8] [In the formula, R is a carbazolyl group, a pyridyl group, a thienyl group, an indolyl group, a furyl group, or a substituted or unsubstituted phenyl group, a styryl group, a naphthyl group, or an anthryl group, and these substituents is from the group consisting of a dialkylamino group, an alkyl group, an alkoxy group, a carboxy group or an ester thereof, a halogen atom, a cyano group, an aralkylamino group, an N-alkyl-N-aralkyl amino group, an amino group, a nitro group, and an acetylamino group Represents the selected group. ]

【0016】[0016]

【化9】 〔式中、nは0または1の整数、R1は水素原子、アル
キル基または置換もしくは無置換のフェニル基を示し、
Aは 9−アントリル基または置換もしくは無置換のN−アル
キルカルバゾリル基を表わし、ここでR2は水素原子、
アルキル基、アルコキシ基、ハロゲン原子または(但し
、R3およびR4はアルキル基、置換または無置換のア
ラルキル基、置換または無置換のアリール基を示し、R
3およびR4は環を形成してもよい)を表わし、mは0
,1,2または3の整数であって、mが2以上まときは
R2は同一でも異なってもよい。〕
[In the formula, n is an integer of 0 or 1, R1 represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted phenyl group,
A represents a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, where R2 is a hydrogen atom,
an alkyl group, an alkoxy group, a halogen atom or (where R3 and R4 represent an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group,
3 and R4 may form a ring), m is 0
, 1, 2 or 3, and when m is 2 or more, R2 may be the same or different. ]

【0017】[0017]

【化10】 〔式中、R1は低級アルキル基またはベンジル基を表わ
し、R2は水素原子、低級アルキル基、低級アルコキシ
基、ハロゲン原子、ニトロ基、アミノ基あるいは低級ア
ルキル基またはベンジル基で置換されたアミノ基を表わ
し、nは1または2の整数を表わす。〕
[In the formula, R1 represents a lower alkyl group or a benzyl group, and R2 is substituted with a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group, an amino group, a lower alkyl group, or a benzyl group] represents an amino group, and n represents an integer of 1 or 2. ]

【0018】[0018]

【化11】 〔式中、R1は水素原子、アルキル基、アルコキシ基ま
たはハロゲン原子を表わし、R2およびR3はアルキル
基、置換または無置換のアラルキル基あるいは置換また
は無置換のアリール基を表わし、R4は水素原子または
置換もしくは無置換のフェニル基を表わし、また、Ar
はフェニル基またはナフチル基を表わす。〕
[In the formula, R1 represents a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom, R2 and R3 represent an alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aryl group, and R4 represents a hydrogen atom or a substituted or unsubstituted phenyl group, and Ar
represents a phenyl group or a naphthyl group. ]

【0019
0019
]

【化12】 〔式中、Rは水素またはハロゲン原子を表わし、Arは
置換または無置換のフェニル基、ナフチル基、アントリ
ル基あるいはカルバゾリル基を表わす。〕
embedded image [In the formula, R represents hydrogen or a halogen atom, and Ar represents a substituted or unsubstituted phenyl group, naphthyl group, anthryl group, or carbazolyl group. ]

【0020】[0020]

【化13】 〔式中、R1,R2およびR3は水素、低級アルキル基
、低級アルコキシ基、ジアルキルアミノ基またはハロゲ
ン原子を表わし、nは0または1を表わす。〕
embedded image [In the formula, R1, R2 and R3 represent hydrogen, a lower alkyl group, a lower alkoxy group, a dialkylamino group or a halogen atom, and n represents 0 or 1. ]

【002
1】以下、本発明をさらに詳しく説明する。本発明に用
いられる正孔搬送物質としては次のようなものが挙げら
れる。化1で示される具体例としては、4−メトキシベ
ンズアルデヒド1−メチル−1−フェニルヒドラゾン、
2,4−ジメトキシベンズアルデヒド1−ベンジル−1
−フェニルヒドラゾン、4−ジエチルアミノベンズアル
デヒド1,1−ジフェニルヒドラゾン、4−メトキシベ
ンズアルデヒド1−ベンジル−1−(4−メトキシ)フ
ェニルヒドラゾン、4−ジフェニルアミノベンズアルデ
ヒド1−ベンジル−1−フェニルヒドラゾン、4−ジベ
ンジルアミノベンズアルデヒド1,1−ジフェニルヒド
ラゾンなどがある。
002
1] The present invention will be explained in more detail below. Examples of the hole transport substance used in the present invention include the following. Specific examples of formula 1 include 4-methoxybenzaldehyde 1-methyl-1-phenylhydrazone,
2,4-dimethoxybenzaldehyde 1-benzyl-1
-Phenylhydrazone, 4-diethylaminobenzaldehyde 1,1-diphenylhydrazone, 4-methoxybenzaldehyde 1-benzyl-1-(4-methoxy)phenylhydrazone, 4-diphenylaminobenzaldehyde 1-benzyl-1-phenylhydrazone, 4-diphenylaminobenzaldehyde Examples include benzylaminobenzaldehyde 1,1-diphenylhydrazone.

【0022】化2で表わされる具体例としては、9−エ
チルカルバゾール−3−アルデヒド1−メチル−1−フ
ェニルヒドラゾン、9−エチルカルバゾール−3−アル
デヒド1−ベンジル−1−フェニルヒドラゾン、9−エ
チルカルバゾール−3−アルデヒド1,1−ジフェニル
ヒドラゾンなどがある。
Specific examples of formula 2 include 9-ethylcarbazole-3-aldehyde 1-methyl-1-phenylhydrazone, 9-ethylcarbazole-3-aldehyde 1-benzyl-1-phenylhydrazone, and 9-ethylcarbazole-3-aldehyde 1-benzyl-1-phenylhydrazone. Examples include carbazole-3-aldehyde 1,1-diphenylhydrazone.

【0023】化3で表わされる具体例としては、4−ジ
エチルアミノスチレン−β−アルデヒド1−メチル−1
−フェニルヒドラゾン、4−メトキシナフタレン−1−
アルデヒド1−ベンジル−1−フェニルヒドラゾンなど
がある。
Specific examples of formula 3 include 4-diethylaminostyrene-β-aldehyde 1-methyl-1
-Phenylhydrazone, 4-methoxynaphthalene-1-
Examples include aldehyde 1-benzyl-1-phenylhydrazone.

【0024】化4で表わされる具体例としては、1−N
,N−ビス(4−メチルフェニル)アミノピレン、1−
N,N−ビス(3−メチルフェニル)アミノピレン。
As a specific example represented by chemical formula 4, 1-N
, N-bis(4-methylphenyl)aminopyrene, 1-
N,N-bis(3-methylphenyl)aminopyrene.

【0025】化5で表わされる具体例としては、N,N
−ジフェニル−〔1,1’−ビフェニル〕−4−アミン
、N,N−ビス(4−メチルフェニル)−〔1,1’−
ビフェニル〕−4−アミン、N,N−ビス(4−メチル
フェニル)−〔1,1’−ビフェニル〕−4−アミン、
4’−メチル−N,N−ビス(4−メチルフェニル)−
〔1,1’−ビフェニル〕−4−アミン、4’−エチル
−N,N−ビス(4−メチルフェニル)−〔1,1’−
ビフェニル〕−4−アミン、4’−t−ブチル−N,N
−ビス(3−メチルフェニル)−〔1,1’−ビフェニ
ル〕−4−アミン、2’,4’,6’−トリメチル−N
,N−ビス(4−メチルフェニル)−〔1,1’−ビフ
ェニル〕−4−アミン、3−メチル−3’−メチル−N
−4−メトキシフェニル−N−4−メチルフェニル)−
〔1,1’−ビフェニル〕−4−アミン、4’−フェノ
キシ−N,N−ビス(4−クロルフェニル)−〔1,1
’−ビフェニル〕−4−アミン、4’−ベンジル−N,
N−ビス(2−エチルフェニル)−〔1,1’−ビフェ
ニル〕−4−アミン。
As a specific example represented by chemical formula 5, N, N
-diphenyl-[1,1'-biphenyl]-4-amine, N,N-bis(4-methylphenyl)-[1,1'-
biphenyl]-4-amine, N,N-bis(4-methylphenyl)-[1,1'-biphenyl]-4-amine,
4'-Methyl-N,N-bis(4-methylphenyl)-
[1,1'-biphenyl]-4-amine, 4'-ethyl-N,N-bis(4-methylphenyl)-[1,1'-
biphenyl]-4-amine, 4'-t-butyl-N,N
-bis(3-methylphenyl)-[1,1'-biphenyl]-4-amine, 2',4',6'-trimethyl-N
, N-bis(4-methylphenyl)-[1,1'-biphenyl]-4-amine, 3-methyl-3'-methyl-N
-4-methoxyphenyl-N-4-methylphenyl)-
[1,1'-biphenyl]-4-amine, 4'-phenoxy-N,N-bis(4-chlorophenyl)-[1,1
'-Biphenyl]-4-amine, 4'-benzyl-N,
N-bis(2-ethylphenyl)-[1,1'-biphenyl]-4-amine.

【0026】化6で表わされる具体例としては、9−(
4−ジメチルアミノベンジリデン)フルオレン、3−(
9−フルオレニリデン)−9−エチルカルバゾールなど
がある。
As a specific example represented by chemical formula 6, 9-(
4-dimethylaminobenzylidene) fluorene, 3-(
Examples include 9-fluorenylidene)-9-ethylcarbazole.

【0027】化7で表わされる具体例としては、トリス
(4−ジエチルアミノフェニル)メタン、1,1−ビス
(4−ジベンジルアミノフェニル)プロパン、2,2’
−ジメチル−4,4’−ビス(ジエチルアミノ)−トリ
フェニルメタンなどがある。
Specific examples of formula 7 include tris(4-diethylaminophenyl)methane, 1,1-bis(4-dibenzylaminophenyl)propane, 2,2'
-dimethyl-4,4'-bis(diethylamino)-triphenylmethane and the like.

【0028】化8で表わされる具体例としては、1,2
−ビス(4−ジエチルアミノスチリル)ベンゼン、1,
2−ビス(2,4−ジメトキシスチリル)ベンゼンがあ
る。
As a specific example represented by chemical formula 8, 1, 2
-bis(4-diethylaminostyryl)benzene, 1,
2-bis(2,4-dimethoxystyryl)benzene.

【0029】化9で表わされる具体例としては、4’−
ジフェニルアミノ−α−フェニルスチルベン、4’−メ
チルフェニルアミノ−α−フェニルスチルベンなどがあ
る。
As a specific example represented by chemical formula 9, 4'-
Examples include diphenylamino-α-phenylstilbene and 4'-methylphenylamino-α-phenylstilbene.

【0030】化10で表わされる具体例としては、3−
スチリル−9−エチルカルバゾール、3−(4−メトキ
シスチリル)−9−エチルカルバゾールなどがある。
As a specific example represented by chemical formula 10, 3-
Examples include styryl-9-ethylcarbazole and 3-(4-methoxystyryl)-9-ethylcarbazole.

【0031】化11で表わされる具体例としては、4−
ジフェニルアミノスチルベン、4−ジベンジルアミノス
チルベン、4−ジトリルアミノスチルベン、1−(4−
ジフェニルアミノスチリル)ナフタレン、1−(4−ジ
エチルアミノスチリル)ナフタレンなどがある。
As a specific example represented by chemical formula 11, 4-
Diphenylaminostilbene, 4-dibenzylaminostilbene, 4-ditolylaminostilbene, 1-(4-
Examples include diphenylaminostyryl) naphthalene and 1-(4-diethylaminostyryl) naphthalene.

【0032】化12で表わされる具体例としては、9−
(4−ジエチルアミノスチリル)アントラセン、9−ブ
ロム−10−(4−ジエチルアミノスチリル)アントラ
センなどがある。
As a specific example represented by chemical formula 12, 9-
(4-diethylaminostyryl)anthracene, 9-bromo-10-(4-diethylaminostyryl)anthracene, and the like.

【0033】化13で表わされる具体例としては、1−
フェニル−3−(4−ジエチルアミノスチリル)−5−
(4−ジエチルアミノフェニル)ピラゾリン、1−フェ
ニル−3−(4−ジメチルアミノスチリル)−5−(4
−ジメチルアミノフェニル)ピラゾリンなどがある。
As a specific example represented by chemical formula 13, 1-
Phenyl-3-(4-diethylaminostyryl)-5-
(4-diethylaminophenyl)pyrazoline, 1-phenyl-3-(4-dimethylaminostyryl)-5-(4
-dimethylaminophenyl)pyrazoline, etc.

【0034】これらの化合物は単独でも2種以上併用し
ても良い。正孔搬送物質と結着樹脂との重量比は1:9
9〜50:50であり、好ましくは10:90〜20:
80の範囲のとき所期の目的を達成することができる。 1:99以下では残留電位低減の効果は無く、20:8
0以上では機械的強度が劣化する。本発明の表面保護層
を形成するには金属又は金属酸化物粉末を結着樹脂溶液
中にボールミルあるいはビーズミルなどの方法で分散し
、次にこの分散液にたいし正孔搬送物質と結着樹脂との
重量比が1:99〜50:50になるように上記正孔搬
送物質を添加し、これを光導電層上に浸漬・スプレーな
どの方法で塗布、乾燥、硬化させればよい。
These compounds may be used alone or in combination of two or more. The weight ratio of hole transport substance and binder resin is 1:9
9-50:50, preferably 10:90-20:
When the value is in the range of 80, the desired purpose can be achieved. Below 1:99, there is no residual potential reduction effect, and 20:8
If it is 0 or more, mechanical strength deteriorates. To form the surface protective layer of the present invention, metal or metal oxide powder is dispersed in a binder resin solution using a method such as a ball mill or a bead mill, and then a hole transporting substance and a binder resin are added to this dispersion. The above-mentioned hole transporting substance may be added in a weight ratio of 1:99 to 50:50, and this may be applied onto the photoconductive layer by a method such as dipping or spraying, followed by drying and curing.

【0035】本発明に用いられる金属あるいは金属酸化
物微粉末としては銅、スズ、アルミニウム、インジウム
等の金属あるいは酸化スズ、酸化亜鉛、酸化チタン、酸
化インジウム、酸化アンチモン、酸化ビスマス、アンチ
モンをドープした酸化スズ、スズをドープした酸化イン
ジウム等の金属酸化物微粉末を用いることができる。こ
れら金属あるいは金属酸化物微粉末は2種以上混合して
もかまわない。これら微粉末の平均粒径は0.5μm以
下好ましくは0.2μm以下にあることが保護層の透過
率の点から好ましい。
The metal or metal oxide fine powder used in the present invention is doped with metals such as copper, tin, aluminum, and indium, or tin oxide, zinc oxide, titanium oxide, indium oxide, antimony oxide, bismuth oxide, and antimony. Metal oxide fine powder such as tin oxide or tin-doped indium oxide can be used. Two or more of these metal or metal oxide fine powders may be mixed. The average particle diameter of these fine powders is preferably 0.5 μm or less, preferably 0.2 μm or less, from the viewpoint of the transmittance of the protective layer.

【0036】本発明に用いられる結着樹脂としては、シ
リコーン樹脂、ポリウレタン樹脂、アクリル樹脂、ポリ
エステル樹脂、ポリカーボネート樹脂、ポリスチレン樹
脂、エポキシ樹脂等が例示できる。なお、保護層中には
分散性、接着性あるいは平滑性を向上させる目的で種々
の添加剤を加えても良い。
Examples of the binder resin used in the present invention include silicone resin, polyurethane resin, acrylic resin, polyester resin, polycarbonate resin, polystyrene resin, and epoxy resin. Note that various additives may be added to the protective layer for the purpose of improving dispersibility, adhesion, or smoothness.

【0037】本発明に用いられる光導電層としてはSe
、Se−Te、As2Se3等のSe合金、ZnO、C
dS、CdSe等のII〜VI族化合物の粒子を樹脂に
分散させたもの、ポリビニルカルバゾール等の有機光導
電材料あるいはa−Si等が用いられる。光導電層の構
成は特に制約がなく、単層でも電荷発生層と電荷輸送層
の積層であってもかまわない。さらに保護層と光導電層
との間に密着性を高めるための接着層や電荷注入を阻止
するための電気的バリアー層を設けてもよい。
The photoconductive layer used in the present invention is Se.
, Se-Te, Se alloys such as As2Se3, ZnO, C
Used are particles of II to VI group compounds such as dS and CdSe dispersed in resin, organic photoconductive materials such as polyvinylcarbazole, or a-Si. There are no particular restrictions on the structure of the photoconductive layer, and it may be a single layer or a stack of a charge generation layer and a charge transport layer. Further, an adhesive layer for increasing adhesion and an electrical barrier layer for preventing charge injection may be provided between the protective layer and the photoconductive layer.

【0038】導電性支持体としては導電体あるいは導電
処理をした絶縁体が用いられる。たとえばAl、Ni、
Fe、Cu、Auなどの金属あるいは合金、ポリエステ
ル、ポリカーボネート、ポリイミド、ガラス等の絶縁性
基体上にAl、Ag、Au等の金属あるいはIn2O3
、SnO2等の導電材料の薄膜を形成したもの、導電処
理をした紙等が例示できる。また導電性支持体の形状は
特に制約はなく、必要に応じて板状、ドラム状、ベルト
状のものが用いられる。
As the conductive support, a conductor or an insulator treated for conductivity is used. For example, Al, Ni,
Metals such as Fe, Cu, Au, etc. or alloys, polyester, polycarbonate, polyimide, glass, etc. on insulating substrates such as Al, Ag, Au, etc. or In2O3
Examples include those formed with a thin film of a conductive material such as SnO2, and paper treated with conductive treatment. Further, there are no particular restrictions on the shape of the conductive support, and plate-like, drum-like, or belt-like ones may be used as required.

【0039】[0039]

【実施例】以下、本発明を実施例に従って説明する。 実施例1 80mmφ×340mm(長さ)のAlドラム支持体を
真空蒸着装置内にセットし、またこの装置の蒸着源ボー
トにAs2Se3合金を入れ、真空度3/106Tor
r、支持体温度200℃、ボート温度450℃の条件で
蒸着を行い、支持体上に60μm厚の光導電層を形成し
た。次にこの上に、a)アルコキシ基含有ポリシロキサ
ンとb)水酸基含有ポリシロキサンとc)炭素原子に結
合したアミノ基、イミノ基又はニトリル基を少なくとも
1個及びアルコキシ基が2〜3個結合した珪素原子を有
する有機珪素化合物とを主成分とするシリコーン樹脂A
(トーレシリコーン社製AY42−440)と前記a)
、b)及びc)の成分比が異なるシリコーン樹脂B(ト
ーレシリコーン社製AY42−441)との等量(重量
)混合物のリグロイン溶液をスプレー塗布し、120℃
で1時間乾燥して0.15μm厚の電気的バリアー層(
中間層)を形成した。次にSt−MMA−2−HEMA
共重合体の20wt%酢酸2−エトキシエチル/メチル
イソブチルケトン(7/3重量比)溶液30重量部と抵
抗制御剤SnO214重量部とをボールミルで120時
間分散後、ヘキサメチレンジイソシアナート3重量部、
4−メトキシベンズアルデヒド1−メチル−1−フェニ
ルヒドラゾン0.9重量部を加えこれを電気的バリアー
層(中間層)上にスプレー塗布し、130℃で1時間の
乾燥を行い5μm厚の表面保護層を形成し、電子写真用
感光体を作製した。
[Examples] The present invention will be explained below with reference to Examples. Example 1 An Al drum support of 80 mmφ x 340 mm (length) was set in a vacuum evaporation device, and As2Se3 alloy was put in the evaporation source boat of this device, and the vacuum degree was 3/106 Tor.
Vapor deposition was performed under the following conditions: r, support temperature 200° C., boat temperature 450° C., and a 60 μm thick photoconductive layer was formed on the support. Next, on top of this, a) a polysiloxane containing an alkoxy group, b) a polysiloxane containing a hydroxyl group, and c) at least one amino group, imino group, or nitrile group bonded to a carbon atom and 2 to 3 alkoxy groups bonded. Silicone resin A whose main component is an organic silicon compound having a silicon atom
(AY42-440 manufactured by Toray Silicone) and the above a)
A ligroin solution of an equal amount (by weight) mixture of silicone resin B (AY42-441 manufactured by Toray Silicone Co., Ltd.) having different component ratios of , b) and c) was spray applied, and the mixture was heated at 120°C.
to form a 0.15 μm thick electrical barrier layer (
intermediate layer) was formed. Next, St-MMA-2-HEMA
After dispersing 30 parts by weight of a 20 wt% copolymer solution of 2-ethoxyethyl acetate/methyl isobutyl ketone (7/3 weight ratio) and 214 parts by weight of the resistance control agent SnO in a ball mill for 120 hours, 3 parts by weight of hexamethylene diisocyanate was added. ,
Add 0.9 parts by weight of 4-methoxybenzaldehyde 1-methyl-1-phenylhydrazone and spray coat it onto the electrical barrier layer (intermediate layer), dry at 130°C for 1 hour to form a 5 μm thick surface protective layer. was formed to produce an electrophotographic photoreceptor.

【0040】実施例2 前記正孔搬送物質を4−メトキシベンズアルデヒド1−
メチル−1−フェニルヒドラゾン0.09重量部に変え
た他は実施例1と全く同様にして電子写真用感光体を作
製した。
Example 2 The hole transport substance was 4-methoxybenzaldehyde 1-
An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 0.09 parts by weight of methyl-1-phenylhydrazone was used.

【0041】実施例3 前記正孔搬送物質を4−メトキシベンズアルデヒド1−
メチル−1−フェニルヒドラゾン9重量部に変えた他は
実施例1と全く同様にして電子写真用感光体を作製した
Example 3 The hole transport substance was 4-methoxybenzaldehyde 1-
An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 9 parts by weight of methyl-1-phenylhydrazone was used.

【0042】実施例4 前記正孔搬送物質を4−ジメトキシベンズアルデヒド1
−ベンジル−1−フェニルヒドラゾン0.9重量部に変
えた他は実施例1と全く同様にして電子写真用感光体を
作製した。
Example 4 The hole transport substance was 4-dimethoxybenzaldehyde 1
An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 0.9 parts by weight of -benzyl-1-phenylhydrazone was used.

【0043】実施例5 前記正孔搬送物質を9−エチルカルバゾール−3−アル
デヒド1−メチル−1−フェニルヒドラゾン0.9重量
部に変えた他は実施例1と同様にして電子写真用感光体
を作製した。
Example 5 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that the hole transporting substance was changed to 0.9 parts by weight of 9-ethylcarbazole-3-aldehyde 1-methyl-1-phenylhydrazone. was created.

【0044】実施例6 前記正孔搬送物質を9−エチルカルバゾール−3−アル
デヒド1−メチル−1−フェニルヒドラゾン0.09重
量部に変えた他は実施例1と全く同様にして電子写真感
光体を作製した。
Example 6 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that the hole transport substance was changed to 0.09 parts by weight of 9-ethylcarbazole-3-aldehyde 1-methyl-1-phenylhydrazone. was created.

【0045】実施例7 前記正孔搬送物質を9−エチルカルバゾール−3−アル
デヒド1−メチル−1−フェニルヒドラゾン9重量部に
変えた他は実施例1と全く同様にして電子写真用感光体
を作製した。
Example 7 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 9 parts by weight of 9-ethylcarbazole-3-aldehyde 1-methyl-1-phenylhydrazone was used as the hole transport substance. Created.

【0046】実施例8 前記正孔搬送物質を9−エチルカルバゾール−3−アル
デヒド  1−ベンジル−1−フェニルヒドラゾン0.
9重量部に変えた他は実施例1と全く同様にして電子写
真用感光体を作製した。
Example 8 The hole transport substance was 9-ethylcarbazole-3-aldehyde, 1-benzyl-1-phenylhydrazone, 0.
An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the amount was changed to 9 parts by weight.

【0047】実施例9 前記搬送物質を4−メトキシナフタレン−1−アルデヒ
ド1−ベンジル−1−フェニルヒドラゾン0.9重量部
に変えた他は実施例1と全く同様にして電子写真用感光
体を作製した。
Example 9 An electrophotographic photoreceptor was produced in the same manner as in Example 1, except that the carrier substance was changed to 0.9 parts by weight of 4-methoxynaphthalene-1-aldehyde-1-benzyl-1-phenylhydrazone. Created.

【0048】実施例10 前記正孔搬送物質を4−メトキシナフタレン−1−アル
デヒド  1−ベンジル−1−フェニルヒドラゾン0.
09重量部に変えた他は実施例1と全く同様にして電子
写真用感光体を作製した。
Example 10 The hole transporting substance was 4-methoxynaphthalene-1-aldehyde, 1-benzyl-1-phenylhydrazone, 0.
An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the amount was changed to 0.09 parts by weight.

【0049】実施例11 前記正孔搬送物質を4−メトキシナフタレン−1−アル
デヒド  1−ベンジル−1−フェニルヒドラゾン9重
量部に変えた他は実施例1と全く同様にして電子写真用
感光体を作製した。
Example 11 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that the hole transport substance was changed to 9 parts by weight of 4-methoxynaphthalene-1-aldehyde 1-benzyl-1-phenylhydrazone. Created.

【0050】実施例12 前記正孔搬送物質を4−ジエチルアミノスチレン−β−
アルデヒド  1−メチル−1−フェニルヒドラゾン0
.9重量部に変えた他は実施例1と全く同様にして電子
写真用感光体を作製した。
Example 12 The hole transport substance was 4-diethylaminostyrene-β-
Aldehyde 1-methyl-1-phenylhydrazone 0
.. An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the amount was changed to 9 parts by weight.

【0051】実施例13 前記搬送物質を1−N,N−ビス(4−メチルフェニル
)アミノピレン0.9重量部に変えた他は実施例1と全
く同様にして電子写真用感光体を作製した。
Example 13 An electrophotographic photoreceptor was produced in the same manner as in Example 1, except that the carrier substance was changed to 0.9 parts by weight of 1-N,N-bis(4-methylphenyl)aminopyrene. .

【0052】実施例14 前記正孔搬送物質を1−N,N−ビス(4−メチルフェ
ニル)アミノピレン0.09重量部に変えた他は実施例
1と全く同様にして電子写真用感光体を作製した。
Example 14 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.09 parts by weight of 1-N,N-bis(4-methylphenyl)aminopyrene was used as the hole transport substance. Created.

【0053】実施例15 前記正孔搬送物質を1−N,N−ビス(4−メチルフェ
ニル)アミノピレン9重量部に変えた他は実施例1と全
く同様にして電子写真用感光体を作製した。
Example 15 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that the hole transport substance was changed to 9 parts by weight of 1-N,N-bis(4-methylphenyl)aminopyrene. .

【0054】実施例16 前記正孔搬送物質を1−N,N−ビス(3−メチルフェ
ニル)アミノピレン0.9重量部に変えた他は実施例1
と全く同様にして電子写真用感光体を作製した。
Example 16 Example 1 except that the hole transport substance was changed to 0.9 parts by weight of 1-N,N-bis(3-methylphenyl)aminopyrene.
An electrophotographic photoreceptor was produced in exactly the same manner as described above.

【0055】実施例17 前記搬送物質をN,N−ジフェニル〔1,1’−ビフェ
ニル〕−4−アミン0.9重量部に変えた他は実施例1
と全く同様にして電子写真用感光体を作製した。
Example 17 Example 1 except that the carrier substance was changed to 0.9 parts by weight of N,N-diphenyl[1,1'-biphenyl]-4-amine.
An electrophotographic photoreceptor was produced in exactly the same manner as described above.

【0056】実施例18 前記正孔搬送物質をN,N−ジフェニル〔1,1’−ビ
フェニル〕−4−アミン0.09重量部に変えた他は実
施例1と全く同様にして電子写真用感光体を作製した。
Example 18 A sample for electrophotography was prepared in the same manner as in Example 1 except that the hole transport substance was changed to 0.09 parts by weight of N,N-diphenyl[1,1'-biphenyl]-4-amine. A photoreceptor was produced.

【0057】実施例19 前記正孔搬送物質をN,N−ジフェニル〔1,1’−ビ
フェニル〕−4−アミン9重量部に変えた他は実施例1
と全く同様にして電子写真用感光体を作製した。
Example 19 Example 1 except that the hole transport substance was changed to 9 parts by weight of N,N-diphenyl[1,1'-biphenyl]-4-amine.
An electrophotographic photoreceptor was produced in exactly the same manner as described above.

【0058】実施例20 前記正孔搬送物質をN,N−ビス(4−メチルフェニル
)−〔1,1’−ビフェニル〕−4−アミン0.9重量
部に変えた他は実施例1と全く同様にして電子写真用感
光体を作製した。
Example 20 Same as Example 1 except that 0.9 parts by weight of N,N-bis(4-methylphenyl)-[1,1'-biphenyl]-4-amine was used as the hole transport substance. An electrophotographic photoreceptor was produced in exactly the same manner.

【0059】実施例21 前記搬送物質を9−(4−ジメチルアミノベンジリデン
)フルオレン0.9重量部に変えた他は実施例1と全く
同様にして電子写真用感光体を作製した。
Example 21 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.9 parts by weight of 9-(4-dimethylaminobenzylidene)fluorene was used as the carrier substance.

【0060】実施例22 前記正孔搬送物質を9−(4−ジメチルアミノベンジリ
デン)フルオレン0.09重量部に変えた他は実施例1
と全く同様にして電子写真用感光体を作製した。
Example 22 Example 1 except that the hole transport substance was changed to 0.09 parts by weight of 9-(4-dimethylaminobenzylidene)fluorene.
An electrophotographic photoreceptor was produced in exactly the same manner as described above.

【0061】実施例23 前記正孔搬送物質を9−(4−ジメチルアミノベンジリ
デン)フルオレン9重量部に変えた他は実施例1と全く
同様にして電子写真用感光体を作製した。
Example 23 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 9 parts by weight of 9-(4-dimethylaminobenzylidene)fluorene was used as the hole transport substance.

【0062】実施例24 前記正孔搬送物質を3−(9−フルオレニリデン)−9
−エチルカルバゾール0.9重量部に変えた他は実施例
1と全く同様にして電子写真用感光体を作製した。
Example 24 The hole transport substance was 3-(9-fluorenylidene)-9
An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that -ethylcarbazole was used in an amount of 0.9 parts by weight.

【0063】実施例25 前記搬送物質を1,1−ビス(4−ジベンジルアミノフ
ェニル)プロパン0.9重量部に変えた他は実施例1と
全く同様にして電子写真用感光体を作製した。
Example 25 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that the carrier substance was changed to 0.9 parts by weight of 1,1-bis(4-dibenzylaminophenyl)propane. .

【0064】実施例26 前記正孔搬送物質を1,1−ビス(4−ジベンジルアミ
ノフェニル)プロパン0.09重量部に変えた他は実施
例1と全く同様にして電子写真用感光体を作製した。
Example 26 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.09 parts by weight of 1,1-bis(4-dibenzylaminophenyl)propane was used as the hole transport substance. Created.

【0065】実施例27 前記正孔搬送物質を1,1−ビス(4−ジベンジルアミ
ノフェニル)プロパン9重量部に変えた他は実施例1と
全く同様にして電子写真用感光体を作製した。
Example 27 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that the hole transport substance was changed to 9 parts by weight of 1,1-bis(4-dibenzylaminophenyl)propane. .

【0066】実施例28 前記正孔搬送物質をトリス(4−ジエチルアミノフェニ
ル)メタン0.9重量部に変えた他は実施例1と全く同
様にして電子写真用感光体を作製した。
Example 28 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.9 parts by weight of tris(4-diethylaminophenyl)methane was used as the hole transport substance.

【0067】実施例29 前記搬送物質を1,2−ビス(4−ジエチルアミノスチ
リル)ベンゼン0.9重量部に変えた他は実施例1と全
く同様にして電子写真用感光体を作製した。
Example 29 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.9 parts by weight of 1,2-bis(4-diethylaminostyryl)benzene was used as the carrier substance.

【0068】実施例30 前記正孔搬送物質を1,2−ビス(4−ジエチルアミノ
スチリル)ベンゼン0.09重量部に変えた他は実施例
1と全く同様にして電子写真用感光体を作製した。
Example 30 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.09 parts by weight of 1,2-bis(4-diethylaminostyryl)benzene was used as the hole transport substance. .

【0069】実施例31 前記正孔搬送物質を1,2−ビス(4−ジエチルアミノ
スチリル)ベンゼン9重量部に変えた他は実施例1と全
く同様にして電子写真用感光体を作製した。
Example 31 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 9 parts by weight of 1,2-bis(4-diethylaminostyryl)benzene was used as the hole transport substance.

【0070】実施例32 前記正孔搬送物質を1,2−ビス(2,4−ジメトキシ
スチリル)ベンゼン0.9重量部に変えた他は実施例1
と全く同様にして電子写真用感光体を作製した。
Example 32 Example 1 except that the hole transport substance was changed to 0.9 parts by weight of 1,2-bis(2,4-dimethoxystyryl)benzene.
An electrophotographic photoreceptor was produced in exactly the same manner as described above.

【0071】実施例33 前記搬送物質を4’−ジフェニルアミノ−α−フェニル
スチルベン0.9重量部に変えた他は実施例1と全く同
様にして電子写真用感光体を作製した。
Example 33 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 0.9 parts by weight of 4'-diphenylamino-α-phenylstilbene was used as the carrier substance.

【0072】実施例34 前記正孔搬送物質を4’−ジフェニルアミノ−α−フェ
ニルスチルベン0.09重量部に変えた他は実施例1と
全く同様にして電子写真用感光体を作製した。
Example 34 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.09 parts by weight of 4'-diphenylamino-α-phenylstilbene was used as the hole transport substance.

【0073】実施例35 前記正孔搬送物質を4’−ジフェニルアミノ−α−フェ
ニルスチルベン9重量部に変えた他は実施例1と全く同
様にして電子写真用感光体を作製した。
Example 35 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 9 parts by weight of 4'-diphenylamino-α-phenylstilbene was used as the hole transport substance.

【0074】実施例36 前記正孔搬送物質を4’−メチルフェニルアミノ−α−
フェニルスチルベン0.9重量部に変えた他は実施例1
と全く同様にして電子写真用感光体を作製した。
Example 36 The hole transport substance was 4'-methylphenylamino-α-
Example 1 except that phenylstilbene was changed to 0.9 parts by weight
An electrophotographic photoreceptor was produced in exactly the same manner as described above.

【0075】実施例37 前記搬送物質を3−スチリル−9−エチルカルバゾール
0.9重量部に変えた他は実施例1と全く同様にして電
子写真用感光体を作製した。
Example 37 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.9 parts by weight of 3-styryl-9-ethylcarbazole was used as the carrier substance.

【0076】実施例38 前記正孔搬送物質を3−スチリル−9−エチルカルバゾ
ール0.09重量部に変えた他は実施例1と全く同様に
して電子写真用感光体を作製した。
Example 38 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.09 parts by weight of 3-styryl-9-ethylcarbazole was used as the hole transport substance.

【0077】実施例39 前記正孔搬送物質を3−スチリル−9−エチルカルバゾ
ール9重量部に変えた他は実施例1と全く同様にして電
子写真用感光体を作製した。
Example 39 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 9 parts by weight of 3-styryl-9-ethylcarbazole was used as the hole transport substance.

【0078】実施例40 前記正孔搬送物質を3−(4−メトキシスチリル)−9
−エチルカルバゾール0.9重量部に変えた他は実施例
1と全く同様にして電子写真用感光体を作製した。
Example 40 The hole transport substance was 3-(4-methoxystyryl)-9.
An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that -ethylcarbazole was used in an amount of 0.9 parts by weight.

【0079】実施例41 前記正孔搬送物質4−ジフェニルアミノスチルベンを0
.9重量部に変えた他は実施例1と全く同様にして電子
写真用感光体を作製した。
Example 41 The hole transport substance 4-diphenylaminostilbene was added to 0
.. An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the amount was changed to 9 parts by weight.

【0080】実施例42 前記正孔搬送物質を4−ジフェニルアミノスチルベン0
.09重量部に変えた他は実施例1と全く同様にして電
子写真用感光体を作製した。
Example 42 The hole transport substance was 4-diphenylaminostilbene.
.. An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the amount was changed to 0.09 parts by weight.

【0081】実施例43 前記正孔搬送物質を4−ジフェニルアミノスチルベン9
重量部に変えた他は実施例1と全く同様にして電子写真
用感光体を作製した。
Example 43 The hole transport substance was 4-diphenylaminostilbene 9
An electrophotographic photoreceptor was produced in exactly the same manner as in Example 1 except that the parts by weight were changed.

【0082】実施例44 前記正孔搬送物質を4−ジフェニルアミノスチルベン0
.9重量部に変えた他は実施例1と全く同様にして電子
写真用感光体を作製した。
Example 44 The hole transport substance was 4-diphenylaminostilbene.
.. An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the amount was changed to 9 parts by weight.

【0083】実施例45 前記搬送物質を9−(4−ジエチルアミノスチリル)ア
ントラセン0.9重量部に変えた他は実施例1と全く同
様にして電子写真用感光体を作製した。
Example 45 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 0.9 parts by weight of 9-(4-diethylaminostyryl)anthracene was used as the carrier substance.

【0084】実施例46 前記正孔搬送物質を9−(4−ジエチルアミノスチリル
)アントラセン0.09重量部に変えた他は実施例1と
全く同様にして電子写真用感光体を作製した。
Example 46 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 0.09 parts by weight of 9-(4-diethylaminostyryl)anthracene was used as the hole transport substance.

【0085】実施例47 前記正孔搬送物質を9−(4−ジエチルアミノスチリル
)アントラセン9重量部に変えた他は実施例1と全く同
様にして電子写真用感光体を作製した。
Example 47 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that 9 parts by weight of 9-(4-diethylaminostyryl)anthracene was used as the hole transport substance.

【0086】実施例48 前記正孔搬送物質を9−ブロム−10−(4−ジエチル
アミノスチリル)アントラセン0.9重量部に変えた他
は実施例1と全く同様にして電子写真用感光体を作製し
た。
Example 48 An electrophotographic photoreceptor was prepared in the same manner as in Example 1, except that 0.9 parts by weight of 9-bromo-10-(4-diethylaminostyryl)anthracene was used as the hole transport substance. did.

【0087】実施例49 前記搬送物質を1−フェニル−3−(4−ジエチルアミ
ノスチリル)−5−(4−ジエチルアミノフェニル)ピ
ラゾリン0.9重量部に変えた他は実施例1と全く同様
にして電子写真用感光体を作製した。
Example 49 The same procedure as in Example 1 was carried out except that the carrier substance was changed to 0.9 parts by weight of 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline. A photoreceptor for electrophotography was produced.

【0088】実施例50 前記正孔搬送物質を1−フェニル−3−(4−ジエチル
アミノスチリル)−5−(4−ジエチルアミノフェニル
)ピラゾリン0.09重量部に変えた他は実施例1と全
く同様にして電子写真用感光体を作製した。
Example 50 Completely the same as Example 1 except that the hole transport substance was changed to 0.09 parts by weight of 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline. An electrophotographic photoreceptor was produced.

【0089】実施例51 前記正孔搬送物質を1−フェニル−3−(4−ジエチル
アミノスチリル)−5−(4−ジエチルアミノフェニル
)ピラゾリン9重量部に変えた他は実施例1と全く同様
にして電子写真用感光体を作製した。
Example 51 The same procedure as in Example 1 was carried out except that the hole transport substance was changed to 9 parts by weight of 1-phenyl-3-(4-diethylaminostyryl)-5-(4-diethylaminophenyl)pyrazoline. A photoreceptor for electrophotography was manufactured.

【0090】実施例52 前記正孔搬送物質を1−フェニル−3−(4−ジメチル
アミノスチリル)−5−(4−ジメチルアミノフェニル
)ピラゾリン0.9重量部に変えた他は実施例1と全く
同様にして電子写真用感光体を作製した。
Example 52 Same as Example 1 except that the hole transport substance was changed to 0.9 parts by weight of 1-phenyl-3-(4-dimethylaminostyryl)-5-(4-dimethylaminophenyl)pyrazoline. An electrophotographic photoreceptor was produced in exactly the same manner.

【0091】比較例 前記正孔搬送物質を加えない他は実施例1と全く同様に
して電子写真用感光体を作製した。
Comparative Example An electrophotographic photoreceptor was prepared in exactly the same manner as in Example 1, except that the hole transport substance was not added.

【0092】上記のようにして得た電子写真用感光体に
対して、リコー製複写機FT6550を用いて,20℃
65%及び10℃15%の環境下での複写機内の残留電
位を評価し、更に10万枚の画像テストを行い、画像テ
スト前後の保護層の膜厚測定を実施しその摩耗量の評価
を行った。評価結果を表1に示す。
The electrophotographic photoreceptor obtained as described above was heated at 20° C. using a Ricoh copier FT6550.
We evaluated the residual potential inside the copying machine under the conditions of 65% and 10°C and 15%, conducted an image test of 100,000 sheets, measured the thickness of the protective layer before and after the image test, and evaluated the amount of wear. went. The evaluation results are shown in Table 1.

【0093】[0093]

【表1−(1)】[Table 1-(1)]

【0094】[0094]

【表1−(2)】[Table 1-(2)]

【0095】[0095]

【表1−(3)】[Table 1-(3)]

【0096】[0096]

【表1−(4)】[Table 1-(4)]

【0097】表1に示されるように、本発明に係る実施
例1〜52の電子写真用感光体は20℃65%及び10
℃15%下での残留電位が大きく低減されており、更に
正孔搬送物質と結着樹脂との重量比が1:99〜50:
50の範囲にあるので10万枚複写後の表面保護層の膜
厚減少量も著しく小さいことがわかる。また、実施例1
〜52の電子写真用感光体は初期から10万枚後まで品
質の高い画像が安定して継続的に得られるものであった
As shown in Table 1, the electrophotographic photoreceptors of Examples 1 to 52 according to the present invention were heated at 20°C, 65% and 10°C.
The residual potential at 15% °C is greatly reduced, and the weight ratio of the hole transport substance to the binder resin is 1:99 to 50:
50, it can be seen that the amount of decrease in the thickness of the surface protective layer after copying 100,000 sheets is also extremely small. In addition, Example 1
With the electrophotographic photoreceptors No. 52 to 10, high-quality images could be stably and continuously obtained from the initial stage until after 100,000 sheets were printed.

【0098】[0098]

【発明の効果】以上説明したように、本発明に係る表面
保護層を有する電子写真用感光体は高い機械的強度をそ
なえ、かつ複写機内の残留電位及びその環境変動量も著
しく小さい安定した電気特性を示し、更に高品質な画像
が長期に渡って安定して得られる信頼性の高いものであ
る。
Effects of the Invention As explained above, the electrophotographic photoreceptor having the surface protective layer according to the present invention has high mechanical strength, and has a stable electric potential with extremely small residual potential inside the copying machine and extremely small environmental fluctuations. It is a highly reliable product that exhibits characteristics and can stably obtain high-quality images over a long period of time.

Claims (12)

【特許請求の範囲】[Claims] 【請求項1】  導電性支持体上に光導電層及び表面保
護層を順次積層した電子写真用感光体において、表面保
護層が金属あるいは金属酸化物微粉末を結着樹脂中に分
散させた層からなり、かつ正孔搬送物質を含有させたこ
とを特徴とする電子写真用感光体。
Claim 1: In an electrophotographic photoreceptor in which a photoconductive layer and a surface protective layer are sequentially laminated on a conductive support, the surface protective layer is a layer in which metal or metal oxide fine powder is dispersed in a binder resin. What is claimed is: 1. An electrophotographic photoreceptor comprising:
【請求項2】  正孔搬送物質として、下記化1で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化1】 〔式中、R1はアルキル基、ベンジル基、フェニル基を
表わし、R2は水素、炭素数1〜3のアルキル基、炭素
数1〜3のアルコキシ基、ジアルキルアミノ基、ジアラ
ルキルアミノ基またはジアリールアミノ基を表わし、n
は1〜4の整数を表わし、nが2以上のときR2は同じ
でも異なっていてもよい。R3は水素またはメトキシ基
を表わす。〕
2. The electrophotographic photoreceptor according to claim 1, further comprising a compound represented by the following chemical formula 1 as a hole transporting substance. [Formula 1] [In the formula, R1 represents an alkyl group, a benzyl group, or a phenyl group, and R2 represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a dialkylamino group, or a dialkylamino group. group or diarylamino group, n
represents an integer of 1 to 4, and when n is 2 or more, R2 may be the same or different. R3 represents hydrogen or a methoxy group. ]
【請求項3】  正孔搬送物質として、下記化2で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化2】 〔式中、R1はメチル基、エチル基、2−ヒドロキシエ
チル基又は2−クロルエチル基を表わし、R2はメチル
基、エチル基、ベンジル基又はフェニル基を表わし、R
3は水素、塩素、臭素、炭素数1〜4のアルキル基、炭
素数1〜4のアルコキシ基、ジアルキルアミノ基又はニ
トロ基を表わす。〕
3. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 2 as a hole transporting substance. [Formula, R1 represents a methyl group, ethyl group, 2-hydroxyethyl group or 2-chloroethyl group, R2 represents a methyl group, ethyl group, benzyl group or phenyl group, R
3 represents hydrogen, chlorine, bromine, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group, or a nitro group. ]
【請求項4】  正孔搬送物質として、下記化3で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化3】 〔式中、Arはナフタリン環、アントラセン環、スチリ
ル基及びそれらの置換体あるいはピリジン環、フラン環
、チオフェン環を表わし、Rはアルキル基又はベンジル
基を表わす。〕
4. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 3 as a hole transporting substance. embedded image [In the formula, Ar represents a naphthalene ring, an anthracene ring, a styryl group, or a substituted product thereof, or a pyridine ring, a furan ring, or a thiophene ring, and R represents an alkyl group or a benzyl group. ]
【請求項5】  正孔搬送物質として、下記化4で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化4】 〔式中、A1,A2は置換もしくは無置換のアルキル基
又は置換もしくは無置換のアリール基を表わし、それぞ
れ同一でも異なっていてもよい。Arは置換または無置
換の縮合多環式炭化水素基を表わす。〕
5. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 4 as a hole transporting substance. embedded image [In the formula, A1 and A2 represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, and may be the same or different. Ar represents a substituted or unsubstituted condensed polycyclic hydrocarbon group. ]
【請求項6】  正孔搬送物質として、下記化5で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化5】 〔式中、R1,R3及びR4は水素原子、アミノ基、ア
ルコキシ基、チオアルコキシ基、アリールオキシ基、メ
チレンジオキシ基、置換もしくは無置換のアルキル基、
ハロゲン原子又は置換もしくは無置換のアリール基を、
R2は水素原子、アルコキシ基、置換もしくは無置換の
アルキル基又はハロゲンを表わす。kは1〜5の整数、
lは1〜4の整数、mは1〜5の整数、nは1〜5の整
数である。〕
6. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 5 as a hole transporting substance. [Formula 5, R1, R3 and R4 are hydrogen atoms, amino groups, alkoxy groups, thioalkoxy groups, aryloxy groups, methylenedioxy groups, substituted or unsubstituted alkyl groups,
A halogen atom or a substituted or unsubstituted aryl group,
R2 represents a hydrogen atom, an alkoxy group, a substituted or unsubstituted alkyl group, or a halogen. k is an integer from 1 to 5,
l is an integer of 1 to 4, m is an integer of 1 to 5, and n is an integer of 1 to 5. ]
【請求項7】  正孔搬送物質として、下記化6で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化6】 〔式中R1は水素、ハロゲン、シアノ基、炭素数1〜4
のアルコキシ基または炭素数1〜4のアルキル基を表わ
し、Arは R2は炭素数1〜4のアルキル基を表わし、R3は水素
、ハロゲン、炭素数1〜4のアルキル基、炭素数1〜4
のアルコキシ基またはジアルキルアミノ基を表わし、n
は1または2であって、nが2のときはR3は同一でも
異なってもよく、R4およびR5は水素、炭素数1〜4
の置換または無置換のアルキル基あるいは置換または無
置換のベンジル基を表わす。〕
7. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 6 as a hole transporting substance. [Formula R1 is hydrogen, halogen, cyano group, carbon number 1-4
represents an alkoxy group or an alkyl group having 1 to 4 carbon atoms, Ar is R2 represents an alkyl group having 1 to 4 carbon atoms, and R3 is hydrogen, halogen, an alkyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms.
represents an alkoxy group or dialkylamino group, n
is 1 or 2, and when n is 2, R3 may be the same or different, R4 and R5 are hydrogen, and have 1 to 4 carbon atoms.
represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted benzyl group. ]
【請求項8】  正孔搬送物質として、下記化7で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化7】 〔式中、R1は炭素数1〜11のアルキル基、置換もし
くは無置換のフェニル基又は複素環基を表わし、R2,
R3はそれぞれ同一でも異なっていてもよく水素、炭素
数1〜4のアルキル基、ヒドロキシアルキル基、クロル
アルキル基、置換または無置換のアラルキル基を表わし
、また、R2とR3は互いに結合し窒素を含む複素環を
形成していてもよい。R4は同一でも異なっていてもよ
く水素、炭素数1〜4のアルキル基、アルコキシ基又は
ハロゲンを表わす。〕
8. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 7 as a hole transporting substance. [In the formula, R1 represents an alkyl group having 1 to 11 carbon atoms, a substituted or unsubstituted phenyl group, or a heterocyclic group, R2,
R3 may be the same or different and each represents hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group, a chloroalkyl group, a substituted or unsubstituted aralkyl group, and R2 and R3 are bonded to each other and represent nitrogen. may form a heterocycle containing. R4 may be the same or different and represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group, or a halogen. ]
【請求項9】  正孔搬送物質として、下記化8で示さ
れる化合物を含有させたことを特徴とする請求項1記載
の電子写真用感光体。 【化8】 〔式中、Rはカルバゾリル基、ピリジル基、チエニル基
、インドリル基、フリル基或いはそれぞれ置換もしくは
無置換のフェニル基、スチリル基、ナフチル基またはア
ントリル基であって、これらの置換基がジアルキルアミ
ノ基、アルキル基、アルコキシ基、カルボキシ基または
そのエステル、ハロゲン原子、シアノ基、アラルキルア
ミノ基、N−アルキル−N−アラルキルアミノ基、アミ
ノ基、ニトロ基およびアセチルアミノ基からなる群から
選ばれた基を表わす。〕
9. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following formula 8 as a hole transporting substance. [Formula 8] [In the formula, R is a carbazolyl group, a pyridyl group, a thienyl group, an indolyl group, a furyl group, or a substituted or unsubstituted phenyl group, a styryl group, a naphthyl group, or an anthryl group, and these substituents is from the group consisting of a dialkylamino group, an alkyl group, an alkoxy group, a carboxy group or an ester thereof, a halogen atom, a cyano group, an aralkylamino group, an N-alkyl-N-aralkyl amino group, an amino group, a nitro group, and an acetylamino group Represents the selected group. ]
【請求項10】  正孔搬送物質として、下記化9で示
される化合物を含有させたことを特徴とする請求項1記
載の電子写真用感光体。 【化9】 〔式中、nは0または1の整数、R1は水素原子、アル
キル基または置換もしくは無置換のフェニル基を示し、
Aは 9−アントリル基または置換もしくは無置換のN−アル
キルカルバゾリル基を表わし、ここでR2は水素原子、
アルキル基、アルコキシ基、ハロゲン原子または(但し
、R3およびR4はアルキル基、置換または無置換のア
ラルキル基、置換または無置換のアリール基を示し、R
3およびR4は環を形成してもよい)を表わし、mは0
,1,2または3の整数であって、mが2以上のときは
R2は同一でも異なってもよい。〕
10. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 9 as a hole transporting substance. [In the formula, n is an integer of 0 or 1, R1 represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted phenyl group,
A represents a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, where R2 is a hydrogen atom,
an alkyl group, an alkoxy group, a halogen atom or (where R3 and R4 represent an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group,
3 and R4 may form a ring), m is 0
, 1, 2 or 3, and when m is 2 or more, R2 may be the same or different. ]
【請求項11】  
正孔搬送物質として、下記化10で示される化合物を含
有させたことを特徴とする請求項1記載の電子写真用感
光体。 【化10】 〔式中、R1は低級アルキル基またはベンジル基を表わ
し、R2は水素原子、低級アルキル基、低級アルコキシ
基、ハロゲン原子、ニトロ基、アミノ基あるいは低級ア
ルキル基またはベンジル基で置換されたアミノ基を表わ
し、nは1または2の整数を表わす。〕
[Claim 11]
2. The electrophotographic photoreceptor according to claim 1, further comprising a compound represented by the following formula 10 as a hole transporting substance. [In the formula, R1 represents a lower alkyl group or a benzyl group, and R2 is substituted with a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group, an amino group, a lower alkyl group, or a benzyl group] represents an amino group, and n represents an integer of 1 or 2. ]
【請求項12】
  正孔搬送物質として、下記化11で示される化合物
を含有させたことを特徴とする請求項1記載の電子写真
用感光体。 【化11】 〔式中、R1は水素原子、アルキル基、アルコキシ基ま
たはハロゲン原子を表わし、R2およびR3はアルキル
基、置換または無置換のアラルキル基あるいは置換また
は無置換のアリール基を表わし、R4は水素原子または
置換もしくは無置換のフェニル基を表わし、また、Ar
はフェニル基またはナフチル基を表わす。〕【請求項1
3】  正孔搬送物質として、下記化12で示される化
合物を含有させたことを特徴とする請求項1記載の電子
写真用感光体。 【化12】 〔式中、Rは水素またはハロゲン原子を表わし、Arは
置換または無置換のフェニル基、ナフチル基、アントリ
ル基あるいはカルバゾリル基を表わす。〕【請求項14
】  正孔搬送物質として、下記化13で示される化合
物を含有させたことを特徴とする請求項1記載の電子写
真用感光体。 【化13】 〔式中、R1,R2およびR3は水素、低級アルキル基
、低級アルコキシ基、ジアルキルアミノ基またはハロゲ
ン原子を表わし、nは0または1を表わす。〕【請求項
15】  正孔搬送物質と結着樹脂との重量比が1:9
9〜50:50であることを特徴とする請求項1ないし
14のいずれかに記載された電子写真用感光体。
[Claim 12]
2. The electrophotographic photoreceptor according to claim 1, further comprising a compound represented by the following chemical formula 11 as a hole transporting substance. [In the formula, R1 represents a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom, R2 and R3 represent an alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aryl group, and R4 represents a hydrogen atom or a substituted or unsubstituted phenyl group, and Ar
represents a phenyl group or a naphthyl group. ] [Claim 1
3. The electrophotographic photoreceptor according to claim 1, which contains a compound represented by the following chemical formula 12 as a hole transporting substance. embedded image [In the formula, R represents hydrogen or a halogen atom, and Ar represents a substituted or unsubstituted phenyl group, naphthyl group, anthryl group, or carbazolyl group. ] [Claim 14
10. The electrophotographic photoreceptor according to claim 1, further comprising a compound represented by the following chemical formula 13 as a hole transporting substance. embedded image [In the formula, R1, R2 and R3 represent hydrogen, a lower alkyl group, a lower alkoxy group, a dialkylamino group or a halogen atom, and n represents 0 or 1. [Claim 15] The weight ratio of the hole transport substance and the binder resin is 1:9.
15. The electrophotographic photoreceptor according to claim 1, wherein the ratio is 9 to 50:50.
JP06906691A 1991-03-08 1991-03-08 Electrophotographic photoreceptor Expired - Lifetime JP3286711B2 (en)

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