JPH06222590A - Electrophotographic sensitive body - Google Patents

Electrophotographic sensitive body

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Publication number
JPH06222590A
JPH06222590A JP1102793A JP1102793A JPH06222590A JP H06222590 A JPH06222590 A JP H06222590A JP 1102793 A JP1102793 A JP 1102793A JP 1102793 A JP1102793 A JP 1102793A JP H06222590 A JPH06222590 A JP H06222590A
Authority
JP
Japan
Prior art keywords
group
chemical
charge transfer
substituent
charge
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
JP1102793A
Other languages
Japanese (ja)
Other versions
JP3130158B2 (en
Inventor
Hideya Arisue
英也 有末
Koichi Toritsuka
光一 鳥塚
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.)
Mitsubishi Paper Mills Ltd
Original Assignee
Mitsubishi Paper Mills Ltd
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Filing date
Publication date
Application filed by Mitsubishi Paper Mills Ltd filed Critical Mitsubishi Paper Mills Ltd
Priority to JP05011027A priority Critical patent/JP3130158B2/en
Publication of JPH06222590A publication Critical patent/JPH06222590A/en
Application granted granted Critical
Publication of JP3130158B2 publication Critical patent/JP3130158B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Photoreceptors In Electrophotography (AREA)

Abstract

PURPOSE:To provide an electrophotographic sensitive body having high sensitivity, high durability and high potential by electrification, hardly causing the lowering of the sensitivity even after repeated use and maintaining stable potential by electrification. CONSTITUTION:This electrophotographic sensitive body contains a phthalo- cyanine pigment as an electric charge generating material and a stylbene compd. represented by the formula as an electric charge transferring material in the photosensitive layer. In the formula, Ar is an aryl which may have a substituent, each of R1 and R2 is an alkyl which may have a substituent, aralkyl, aryl or a heterocyclic group, R3 is H or a lower alkyl, each of R4-R6 is H, an alkyl which may have a substituent, aryl or a heterocyclic group and each of R7-R9 is H, a halogen or lower alkyl.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は電子写真感光体に関する
ものであり、詳しくは特定の電荷発生物質と特定の電荷
輸送物質を含有する感光層を有する電子写真感光体に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photosensitive member, and more particularly to an electrophotographic photosensitive member having a photosensitive layer containing a specific charge generating substance and a specific charge transporting substance.

【0002】[0002]

【従来の技術】従来、電子写真方式の感光体としては、
セレン、硫化カドミウム、酸化亜鉛、シリコンなどの無
機光導電体を主成分とする感光層を有するものが広く知
られていた。しかし、これらは感度、熱安定性、耐湿
性、耐久性等において必ずしも満足し得るものではな
く、また特にセレン及び硫化カドミウムはその毒性のた
めに製造上、取扱上にも制約があった。
2. Description of the Related Art Conventionally, as an electrophotographic photosensitive member,
Those having a photosensitive layer containing an inorganic photoconductor as a main component such as selenium, cadmium sulfide, zinc oxide, and silicon have been widely known. However, these are not always satisfactory in terms of sensitivity, thermal stability, moisture resistance, durability, etc. Further, selenium and cadmium sulfide are particularly toxic and therefore, they are limited in production and handling.

【0003】一方、有機光導電性化合物を主成分とする
感光層を有する電子写真感光体は、製造が比較的容易で
あること、安価であること、取扱が容易であること、ま
た一般にセレン感光体に比べて熱安定性が優れている等
多くの利点を有し、近年多くの注目を集めている。
On the other hand, an electrophotographic photosensitive member having a photosensitive layer containing an organic photoconductive compound as a main component is relatively easy to manufacture, inexpensive, easy to handle, and generally selenium photosensitive. It has many advantages such as superior thermal stability to the body, and has received much attention in recent years.

【0004】このような有機光導電性化合物としては、
ポリ−N−ビニルカルバゾールがよく知られており、こ
れと2、4、7−トリニトロ−9−フルオレノン等のル
イス酸とから形成される電荷移動錯体を主成分とする感
光層を有する電子写真感光体が特公昭50−10496
号公報に記載されている。しかしながらこの感光体は感
度、成膜性、及び耐久性において必ずしも満足できるも
のではなかった。
As such an organic photoconductive compound,
Poly-N-vinylcarbazole is well known, and an electrophotographic photosensitive material having a photosensitive layer containing as a main component a charge transfer complex formed from this and a Lewis acid such as 2,4,7-trinitro-9-fluorenone. The body is special Japanese Sho 50-10496
It is described in Japanese Patent Publication No. However, this photoreceptor was not always satisfactory in sensitivity, film-forming property and durability.

【0005】これに対し、トリフェニルアミン類、スチ
ルベン類、ヒドラゾン類に代表される電荷移動剤とフタ
ロシアニン、アゾ顔料等の電荷発生剤などを組み合わせ
た低分子量の有機光導電体を含む電子写真感光体が提案
されている。これらを適当なバインダーと組み合わせ、
更に電荷発生能力の高い化合物と電荷移動能力の高い化
合物を、例えば積層型感光体として組み合わせることに
より、セレン等の無機感光体に近い感度を有するものも
出現している。その結果、複写機やプリンター等の分野
で、このような有機光導電性化合物を主成分とする感光
体が大きく進出してきている。
On the other hand, an electrophotographic photosensitive material containing a low molecular weight organic photoconductor in which a charge transfer agent typified by triphenylamines, stilbenes and hydrazones and a charge generating agent such as phthalocyanine and azo pigment are combined. The body is proposed. Combine these with a suitable binder,
Further, by combining a compound having a high charge generation ability and a compound having a high charge transfer ability, for example, as a laminated type photoreceptor, a compound having a sensitivity close to that of an inorganic photoreceptor such as selenium has also appeared. As a result, in the field of copying machines, printers, etc., photoconductors containing such an organic photoconductive compound as a main component have made great progress.

【0006】電荷発生機能と電荷移動機能とをそれぞれ
別個の物質に分担させるようにした積層型あるいは分散
型の機能分離型感光体は、各々の材料の選択範囲が広
く、帯電特性、感度、耐久性等の電子写真特性において
任意の特性を有する電子写真感光体を比較的容易に作成
出来得るという利点を持っている。
The laminated or dispersed function-separated type photoconductor in which the charge generation function and the charge transfer function are shared by different substances has a wide selection range of each material, and the charging characteristics, sensitivity and durability are large. It has an advantage that an electrophotographic photosensitive member having arbitrary electrophotographic characteristics such as properties can be prepared relatively easily.

【0007】従来、電荷発生物質あるいは電荷移動物質
として種々のものが提案されている。例えば、無定形セ
レンからなる電荷発生層とポリ−N−ビニルカルバゾー
ルを主成分とする電荷移動層とを組み合わせた感光層を
有する電子写真感光体が実用化されていた。しかし、無
定形セレンから成る電荷発生層は耐久性に劣るという欠
点を有している。また、有機染料や顔料を電荷発生物質
として用いることが、種々提案されており、例えば、モ
ノアゾ顔料やジスアゾ顔料を感光層中に含有する電子写
真感光体として、特公昭48−30513号公報、特開
昭52−4241号公報、特開昭54−46558号公
報、特公昭56−11945号公報等が既に公知となっ
ている。
Conventionally, various substances have been proposed as charge generating substances or charge transfer substances. For example, an electrophotographic photoreceptor having a photosensitive layer in which a charge generation layer made of amorphous selenium and a charge transfer layer containing poly-N-vinylcarbazole as a main component are combined has been put into practical use. However, the charge generation layer made of amorphous selenium has a drawback of poor durability. Further, various proposals have been made to use an organic dye or pigment as a charge generating substance. For example, as an electrophotographic photoreceptor containing a monoazo pigment or a disazo pigment in a photosensitive layer, JP-B-48-30513, KAISHO No. 52-4241, JP-A No. 54-46558 and JP-B No. 56-11945 are already known.

【0008】しかしながら、機能分離型感光体として実
用化されているものは極く僅かであり、また要求される
多くの特性、例えば帯電特性、感度、残留電位、前露光
特性、繰り返し使用特性等の全てを満足しているとはい
い難いのが現状である。これらの特性は、電荷発生物質
および電荷移動物質の各々の性能に依存することが大き
いといえるが、それらの適合する組み合せの選択が重要
であることも知られており、数多く提案されてきてい
る。その理由は、かかる選択が理論的な根拠に基づくも
のではなく、試行錯誤的に行われているためと考えられ
る。
However, there are very few practically used function-separated type photoreceptors, and many required characteristics such as charging characteristics, sensitivity, residual potential, pre-exposure characteristics, and repetitive use characteristics. It is difficult to say that we are satisfied with everything. It can be said that these characteristics largely depend on the performance of each of the charge generating substance and the charge transfer substance, but it is also known that the selection of a suitable combination thereof is important, and many have been proposed. . The reason is considered to be that such selection is not based on a theoretical basis but is made by trial and error.

【0009】[0009]

【発明が解決しようとする課題】本発明の目的は、高感
度にして、帯電電位が高く、繰返し使用しても感度の低
下が殆んど起らず、帯電電位の安定した機能分離型電子
写真感光体を提供することである。
SUMMARY OF THE INVENTION An object of the present invention is to provide a high-sensitivity, high charge potential, almost no decrease in sensitivity even after repeated use, and a function-separated type electron having a stable charge potential. It is to provide a photographic photoreceptor.

【0010】[0010]

【課題を解決するための手段】本発明者は上記の目的を
達成するために種々の検討をした結果、電子写真感光体
中に電荷発生物質としてフタロシアニン顔料を含有さ
せ、電荷移動物質として一般式化1で示されるスチルベ
ン化合物を含有させることが有効であることを見いだし
本発明に至ったものである。
As a result of various investigations for achieving the above object, the present inventor has incorporated a phthalocyanine pigment as a charge generating substance into an electrophotographic photosensitive member, and has a general formula as a charge transfer substance. The present invention was found to be effective by containing the stilbene compound represented by Chemical formula 1, and the present invention has been achieved.

【0011】フタロシアニン顔料としては、無金属フタ
ロシアニン、種々の金属フタロシアニンが用いられる
が、特に無金属フタロシアニン、オキシチタニウムフタ
ロシアニン、銅フタロシアニン、ジフェノキシゲルマニ
ウムフタロシアニンが好ましい。
As the phthalocyanine pigment, metal-free phthalocyanine and various metal phthalocyanines are used, but metal-free phthalocyanine, oxytitanium phthalocyanine, copper phthalocyanine and diphenoxygermanium phthalocyanine are particularly preferable.

【0012】化1中、Arは置換基を有していてもよい
アリール基を示し、R1及びR2は置換基を有していても
よいアルキル基、アラルキル基、アリール基、複素環基
を示し、R3は水素原子または低級アルキル基を示し、
4、R5、及びR6は水素原子または置換基を有してい
てもよいアルキル基、アリール基、複素環基を示し、R
7、R8、及びR9は水素原子、ハロゲン原子、または低
級アルキル基を示す。
In Chemical Formula 1, Ar represents an aryl group which may have a substituent, and R 1 and R 2 each have an alkyl group, an aralkyl group, an aryl group and a heterocyclic group which may have a substituent. R 3 represents a hydrogen atom or a lower alkyl group,
R 4 , R 5 and R 6 represent a hydrogen atom or an optionally substituted alkyl group, aryl group or heterocyclic group, and R 4
7 , R 8 and R 9 represent a hydrogen atom, a halogen atom or a lower alkyl group.

【0013】ここで、Arの具体例としては、フェニル
基、メトキシフェニル基、トリル基、クロロフェニル
基、ナフチル基等のアリール基を、また、R1及びR2
具体例としては、メチル基、ブチル基、3−メチルオク
チル基等のアルキル基、ベンジル基、4−メチルベンジ
ル基、2−クロロフェネチル基等のアラルキル基、フェ
ニル基、トリル基、クロロフェニル基、ナフチル基等の
アリール基、あるいは、ピリジル基、インドリル基等の
複素環基を、また、R3の具体例としては、水素原子、
あるいは、メチル基、エチル基、プロピル基等の低級ア
ルキル基を、また、R4、R5、及びR6の具体例として
は、水素原子、あるいは、メチル基、ブチル基、2−メ
チルヘキシル基等のアルキル基、フェニル基、メトキシ
フェニル基、トリル基、クロロフェニル基、ナフチル基
等のアリール基、あるいは、ピリジル基、インドリル基
等の複素環基、また、R7、R8、及びR9の具体例とし
ては、水素原子、あるいは、弗素、塩素、臭素等のハロ
ゲン原子、あるいは、メチル基、エチル基等の低級アル
キル基を挙げることができる。
Specific examples of Ar include aryl groups such as phenyl group, methoxyphenyl group, tolyl group, chlorophenyl group and naphthyl group, and specific examples of R 1 and R 2 include methyl group, Butyl group, alkyl group such as 3-methyloctyl group, benzyl group, 4-methylbenzyl group, aralkyl group such as 2-chlorophenethyl group, phenyl group, tolyl group, chlorophenyl group, aryl group such as naphthyl group, or A heterocyclic group such as a pyridyl group or an indolyl group, and specific examples of R 3 include a hydrogen atom,
Alternatively, a lower alkyl group such as a methyl group, an ethyl group and a propyl group, and specific examples of R 4 , R 5 and R 6 are a hydrogen atom, or a methyl group, a butyl group, a 2-methylhexyl group. Such as an alkyl group, a phenyl group, a methoxyphenyl group, a tolyl group, a chlorophenyl group, an aryl group such as a naphthyl group, or a heterocyclic group such as a pyridyl group and an indolyl group, and R 7 , R 8 and R 9 Specific examples thereof include a hydrogen atom, a halogen atom such as fluorine, chlorine and bromine, and a lower alkyl group such as a methyl group and an ethyl group.

【0014】これら化1で示される化合物は、以下の合
成例の方法によって製造される。 合成例(例示化合物化3の合成)
The compounds represented by Chemical Formula 1 are produced by the methods of the following synthetic examples. Synthesis Example (Synthesis of Exemplified Compound 3)

【0015】[0015]

【化2】 [Chemical 2]

【0016】化2のアルデヒド体(10.0g)と、4
−スチリルベンジルトリフェニルフォスフォニウムブロ
マイド(14.2g)のDMF溶液(250ml)に、
カリウム t−ブトキシド(4.47g)を加え、室温
で一晩(約14時間)攪拌した後、1000mlの氷水
に反応液を注入し、析出した結晶を濾取した。これを水
洗、乾燥させた後カラムクロマトグラフィーで精製し
て、例示化合物化3の結晶8.2gを得た。
The aldehyde compound of Chemical formula 2 (10.0 g) and 4
-To a DMF solution (250 ml) of styrylbenzyl triphenylphosphonium bromide (14.2 g),
After adding potassium t-butoxide (4.47 g) and stirring at room temperature overnight (about 14 hours), the reaction solution was poured into 1000 ml of ice water, and the precipitated crystals were collected by filtration. This was washed with water, dried, and purified by column chromatography to obtain 8.2 g of a crystal of Exemplified Compound 3.

【0017】融点154.0〜156.0℃、収率60
%。 NMR(δ、ppm、CDCl3 ) 7.2−7.6(m,16H)、6.8−7.2(m,
16H)、6.71(d,1H)
Melting point 154.0 to 156.0 ° C., yield 60
%. NMR (δ, ppm, CDCl 3 ) 7.2-7.6 (m, 16H), 6.8-7.2 (m,
16H), 6.71 (d, 1H)

【0018】次に本発明にかかわるスチルベン化合物を
例示するが、これらに限定されるものではない。
Next, the stilbene compounds according to the present invention will be exemplified, but the present invention is not limited thereto.

【0019】[0019]

【化3】 [Chemical 3]

【0020】[0020]

【化4】 [Chemical 4]

【0021】[0021]

【化5】 [Chemical 5]

【0022】[0022]

【化6】 [Chemical 6]

【0023】[0023]

【化7】 [Chemical 7]

【0024】[0024]

【化8】 [Chemical 8]

【0025】[0025]

【化9】 [Chemical 9]

【0026】[0026]

【化10】 [Chemical 10]

【0027】[0027]

【化11】 [Chemical 11]

【0028】[0028]

【化12】 [Chemical 12]

【0029】[0029]

【化13】 [Chemical 13]

【0030】[0030]

【化14】 [Chemical 14]

【0031】[0031]

【化15】 [Chemical 15]

【0032】[0032]

【化16】 [Chemical 16]

【0033】[0033]

【化17】 [Chemical 17]

【0034】[0034]

【化18】 [Chemical 18]

【0035】[0035]

【化19】 [Chemical 19]

【0036】[0036]

【化20】 [Chemical 20]

【0037】[0037]

【化21】 [Chemical 21]

【0038】[0038]

【化22】 [Chemical formula 22]

【0039】[0039]

【化23】 [Chemical formula 23]

【0040】[0040]

【化24】 [Chemical formula 24]

【0041】[0041]

【化25】 [Chemical 25]

【0042】[0042]

【化26】 [Chemical formula 26]

【0043】[0043]

【化27】 [Chemical 27]

【0044】[0044]

【化28】 [Chemical 28]

【0045】[0045]

【化29】 [Chemical 29]

【0046】[0046]

【化30】 [Chemical 30]

【0047】[0047]

【化31】 [Chemical 31]

【0048】[0048]

【化32】 [Chemical 32]

【0049】[0049]

【化33】 [Chemical 33]

【0050】[0050]

【化34】 [Chemical 34]

【0051】[0051]

【化35】 [Chemical 35]

【0052】[0052]

【化36】 [Chemical 36]

【0053】本発明にかかる電子写真感光体は、フタロ
シアニン顔料を電荷発生物質として含有させ、上記に示
した様なスチルベン化合物を電荷移動物質として含有さ
せることにより得られ、優れた性能を有する。
The electrophotographic photosensitive member according to the present invention is obtained by containing the phthalocyanine pigment as the charge generating substance and the stilbene compound as shown above as the charge transfer substance, and has excellent performance.

【0054】以下、本発明の各構成要素について詳細に
説明する。まず、感光体の感光層が形成される導電性支
持体としては周知の電子写真感光体に採用されているも
のがいずれも使用できる。具体的には、例えば金、銀、
白金、チタニウム、アルミニウム、銅、亜鉛、鉄、導電
処理をした金属酸化物等のドラム、シート、ベルトある
いはこれらの薄膜のラミネート物、蒸着物等が挙げられ
る。
Hereinafter, each component of the present invention will be described in detail. First, as the electroconductive support on which the photosensitive layer of the photoconductor is formed, any of those known in electrophotographic photoconductors can be used. Specifically, for example, gold, silver,
Examples thereof include platinum, titanium, aluminum, copper, zinc, iron, drums, sheets, belts made of metal oxides or the like subjected to conductive treatment, laminates of these thin films, vapor depositions and the like.

【0055】更に、金属粉末、金属酸化物、カーボンブ
ラック、炭素繊維、ヨウ化銅、電荷移動錯体、無機塩、
イオン伝導性の高分子電解質等の導電性物質を適当なバ
インダーと共に塗布しポリマーマトリックス中に埋め込
んで導電処理を施したプラスチックやセラミック、紙等
で構成されるドラム、シート、ベルト等や、このような
導電性物質を含有し導電性となったプラスチック、セラ
ミック、紙等のドラム、シート、ベルト等が挙げられ
る。
Further, metal powder, metal oxide, carbon black, carbon fiber, copper iodide, charge transfer complex, inorganic salt,
Drums, sheets, belts, etc. made of plastic, ceramics, paper, etc., which have been coated with a conductive substance such as an ion-conductive polymer electrolyte together with a suitable binder and embedded in a polymer matrix and have been subjected to a conductivity treatment, such as Drums, sheets, belts and the like of plastics, ceramics, papers, etc., which are made conductive by containing such a conductive substance can be mentioned.

【0056】感光層は電荷発生物質と電荷移動物質を分
散混合しバインダー中に閉じ込めた単層型、電荷発生物
質と電荷移動物質を分離しバインダー中に封じた積層型
などにより構成される。本発明は何れの系にも適用させ
ることが可能であるが、電荷発生物質と電荷移動物質の
性能を最大限に生かし易い機能分離型積層感光体の系に
おいて用いられるのが好ましい。
The photosensitive layer is composed of a single layer type in which a charge generating substance and a charge transfer substance are dispersed and mixed and confined in a binder, and a laminated type in which the charge generating substance and the charge transfer substance are separated and sealed in a binder. The present invention can be applied to any system, but it is preferably used in a system of a function-separated laminated photoreceptor in which the performances of the charge generating substance and the charge transfer substance are easily utilized to the maximum.

【0057】感光層と導電性支持体の間には感光層から
導電性支持体への電荷の注入をコントロールするために
ブロッキング層を設けても構わないし、感光層表面には
感光体の耐久性を向上させるために表面層を設けても構
わない。
A blocking layer may be provided between the photosensitive layer and the conductive support in order to control the injection of charges from the photosensitive layer to the conductive support. A surface layer may be provided to improve the temperature.

【0058】機能分離型積層型感光体では、電荷発生層
は、少なくとも電荷発生物質としてフタロシアニン顔料
とバインダー樹脂との混合系、あるいは、フタロシアニ
ン顔料の真空蒸着装置による蒸着膜で構成される。バイ
ンダー樹脂としてはスチレン、酢酸ビニル、アクリル酸
エステル、メタアクリル酸エステル等によるビニル化合
物の重合体や共重合体、シリコン樹脂、フェノキシ樹
脂、ブチラール樹脂、ホルマール樹脂、フェノール樹
脂、ポリカーボネイト、ポリアリレート、ポリアミド、
ポリイミド等やエポキシ樹脂、ウレタン樹脂等の熱硬化
性樹脂、光硬化性樹脂等が挙げられる。バインダーは電
荷発生物質(フタロシアニン顔料)100重量部に対し
1から1000重量部、好ましくは1から400重量部
の範囲で用いられる。電荷発生層の厚さは、0.1から
20μmが好ましい。
In the function-separated laminate type photoreceptor, the charge generation layer is composed of a mixed system of at least a phthalocyanine pigment as a charge generation substance and a binder resin, or a vapor deposition film of the phthalocyanine pigment by a vacuum vapor deposition apparatus. As the binder resin, styrene, vinyl acetate, acrylic acid ester, a polymer or copolymer of a vinyl compound such as methacrylic acid ester, silicon resin, phenoxy resin, butyral resin, formal resin, phenolic resin, polycarbonate, polyarylate, polyamide ,
Examples thereof include thermosetting resins such as polyimide and epoxy resins and urethane resins, and photocurable resins. The binder is used in an amount of 1 to 1000 parts by weight, preferably 1 to 400 parts by weight, based on 100 parts by weight of the charge generating substance (phthalocyanine pigment). The thickness of the charge generation layer is preferably 0.1 to 20 μm.

【0059】一般式化1で示されるスチルベン化合物
は、本電子写真感光体において電荷移動物質として用い
られる。例えば、積層型電子写真感光体においては電荷
移動層に含有される。この場合、電荷移動層は、少なく
とも一般式化1で示されるスチルベン化合物及びバイン
ダーで構成される。
The stilbene compound represented by the general formula 1 is used as a charge transfer substance in the present electrophotographic photoreceptor. For example, it is contained in the charge transfer layer in a laminated electrophotographic photoreceptor. In this case, the charge transfer layer is composed of at least the stilbene compound represented by the general formula 1 and a binder.

【0060】電荷移動層に用いられるバインダー樹脂と
しては、ポリスチレン、ポリメチルメタクリレートに代
表されるアクリル樹脂、ビスフェノールAやZ骨格を持
つポリカーボネイト、ポリアリレート、ポリフェニレン
エーテル、ポリエーテルサルフォン、ポリアミド、ポリ
イミド、ポリエステル樹脂等を用いることができる。
As the binder resin used in the charge transfer layer, polystyrene, acrylic resin represented by polymethylmethacrylate, polycarbonate having bisphenol A or Z skeleton, polyarylate, polyphenylene ether, polyether sulfone, polyamide, polyimide, A polyester resin or the like can be used.

【0061】電荷移動層内では電荷移動物質(当該スチ
ルベン化合物)100重量部に対し、バインダーは10
から400重量部の範囲で用いられる。電荷移動層の厚
さは、5から100μmが好ましい。
In the charge transfer layer, 100 parts by weight of the charge transfer material (the stilbene compound) and 10 parts by weight of the binder were used.
Used in the range of 1 to 400 parts by weight. The thickness of the charge transfer layer is preferably 5 to 100 μm.

【0062】本発明の電子写真感光体には成膜性、可と
う性、機械的強度を向上させるために周知の可塑剤を使
用してもよい。
A well-known plasticizer may be used in the electrophotographic photosensitive member of the present invention in order to improve film-forming property, flexibility and mechanical strength.

【0063】更に、本発明の電子写真感光体では、フタ
ロシアニン顔料をバインダーとの混合で使用する場合は
溶剤に分散し、バインダー及び電荷移動物質(当該スチ
ルベン化合物)は溶解させて使用する。使用する溶剤は
クロロホルム、ジクロルメタン、ジクロルエタン、トリ
クロルエタン、トリクロルエチレンなどのハロゲン化炭
化水素、ベンゼン、トルエン、キシレンなどの芳香族炭
化水素、ジオキサン、テトラヒドロフラン、ジメトキシ
エタン等のエーテル系、アセトン、メチルエチルケト
ン、メチルイソブチルケトン等のケトン系、メチルセロ
ソルブ、ジメチルセロソルブ、メチルセロソルブアセテ
ート等のセロソルブ系などの溶剤の単独または2種以上
の混合溶剤またNは必要に応じてアルコール類、アセト
ニトリル、N、N−ジメチルホルムアミドなどの溶剤を
更に加え使用することができる。またドラムに塗工する
場合には浸せき塗布方法等が用いられる。
Further, in the electrophotographic photosensitive member of the present invention, when the phthalocyanine pigment is mixed with a binder, it is dispersed in a solvent and the binder and the charge transfer substance (the stilbene compound) are dissolved and used. Solvents used are halogenated hydrocarbons such as chloroform, dichloromethane, dichloroethane, trichloroethane, trichloroethylene, aromatic hydrocarbons such as benzene, toluene, xylene, ethers such as dioxane, tetrahydrofuran, dimethoxyethane, acetone, methyl ethyl ketone, methyl. Solvents such as ketones such as isobutyl ketone, solvents such as methyl cellosolve, dimethyl cellosolve, and cellosolve such as methyl cellosolve acetate, or a mixed solvent of two or more kinds, and N is alcohols, acetonitrile, N, N-dimethylformamide as necessary. Further, a solvent such as can be added and used. Further, when coating on a drum, a dipping coating method or the like is used.

【0064】[0064]

【実施例】次に本発明を実施例により更に詳細に説明す
るが、本発明はこれらに何ら限定されるものではない。
EXAMPLES The present invention will now be described in more detail by way of examples, which should not be construed as limiting the invention thereto.

【0065】実施例1 無金属フタロシアニン(大日本インキ製Fastoge
n Blue 8120)1重量部とポリエステル樹脂
(東洋紡製バイロン220)1重量部とをシクロヘキサ
ノン100重量部に混合し、ペイントコンディショナー
装置によりガラスビーズと共に2時間分散した。こうし
て得た顔料分散液をアプリケーターにてアルミ蒸着した
ポリエステルフィルム上に塗布し乾燥して、膜厚約0.
2μの電荷発生物質の被膜を形成した。
Example 1 Metal-free phthalocyanine (Fastage manufactured by Dainippon Ink Co., Ltd.
1 part by weight of n Blue 8120) and 1 part by weight of a polyester resin (Vylon 220 manufactured by Toyobo Co., Ltd.) were mixed with 100 parts by weight of cyclohexanone and dispersed together with glass beads for 2 hours by a paint conditioner device. The pigment dispersion thus obtained was coated on a polyester film vapor-deposited with aluminum with an applicator and dried to a film thickness of about 0.
A 2 μ film of charge generating material was formed.

【0066】次に例示化合物化3で示されるスチルベン
化合物を、ポリカーボネート樹脂(帝人化成製パンライ
トC−1400)と1:1の重量比で混合し、ジクロル
メタンを溶剤として10%の溶液を作り、上記電荷発生
物質の被膜上に、この溶液をアプリケーターにより塗布
し、乾燥膜厚20μの電荷輸送層を形成し、感光体を作
成した。
Next, the stilbene compound represented by the exemplified compound formula 3 was mixed with a polycarbonate resin (Panlite C-1400 manufactured by Teijin Kasei) at a weight ratio of 1: 1 to prepare a 10% solution using dichloromethane as a solvent. This solution was applied onto the film of the charge generating substance by an applicator to form a charge transporting layer having a dry film thickness of 20 μm, thereby preparing a photoreceptor.

【0067】この様に作製した積層型電子写真感光体
を、室温暗所で一昼夜保管した後、アルミニウム製のド
ラム素管に貼り付け、ドラム感光体評価装置(ジェンテ
ック(株)製シンシア90)により、感度特性評価を行
った。測定条件は、コロナ印加電圧−5.2kV、照射
光波長750nm、パワー2.0μW/cm2で、露光
は、帯電後5秒経過時に行った。その結果、半減露光量
0.62μJ/cm2と非常に高感度の値を示した。
The laminated electrophotographic photoconductor thus prepared was stored at room temperature in a dark place for one day and then stuck on an aluminum drum base tube, and a drum photoconductor evaluation device (Cynthia 90 manufactured by Gentec Co., Ltd.) Then, the sensitivity characteristics were evaluated. The measurement conditions were a corona applied voltage of -5.2 kV, an irradiation light wavelength of 750 nm, and a power of 2.0 μW / cm 2 , and the exposure was performed 5 seconds after charging. As a result, the half-exposure amount was 0.62 μJ / cm 2, which was a very high value.

【0068】次に、同装置を用い帯電露光の繰り返し特
性を評価した。測定は、コロナ印加電圧−5.2kV、
プロセス速度160mm毎秒で、5000回の帯電及び
光除電の繰り返しを行った。光除電はタングステンラン
プアレイを用いて行った。その結果、1回目の帯電電位
−714Vに対し、5000回目の帯電電位は−702
Vであり、繰返しによる電位の低下が少なく安定してい
ることがわかった。また、5000回繰り返し後、上記
と同様に感度特性を評価したところ、半減露光量0.6
1μJ/cm2であり、感度低下がなく優れた特性を示
した。
Next, the same apparatus was used to evaluate the repeating characteristics of charging exposure. The measurement is a corona applied voltage of -5.2 kV,
At a process speed of 160 mm / sec, the charging and photo-erasing were repeated 5000 times. Photostatic elimination was performed using a tungsten lamp array. As a result, the charging potential at the 5000th time was -702, while the charging potential at the 1st time was -714V.
It was V, and it was found that the potential did not decrease with repetition and was stable. After repeating 5000 times, the sensitivity characteristics were evaluated in the same manner as above.
It was 1 μJ / cm 2 and showed excellent characteristics without deterioration of sensitivity.

【0069】実施例2〜4及び比較例1〜4 電荷移動物質としての例示スチルベン化合物化3の代わ
りに、表1に示す例示化合物、及び比較化合物化37、
化38、化39、化40を用いた以外は実施例1と同様
に積層感光体を作成し、実施例1と同様の測定条件で、
感光体の繰り返し特性およびその前後での感度特性評価
を行った。結果を表2に示す。
Examples 2 to 4 and Comparative Examples 1 to 4 Instead of the exemplified stilbene compound as the charge transfer material, the exemplified compounds shown in Table 1 and the comparative compound 37,
A laminated photoreceptor was prepared in the same manner as in Example 1 except that Chemical formula 38, Chemical formula 39, and Chemical formula 40 were used.
The repeating characteristics of the photoconductor and the sensitivity characteristics before and after the evaluation were evaluated. The results are shown in Table 2.

【0070】[0070]

【化37】 [Chemical 37]

【0071】[0071]

【化38】 [Chemical 38]

【0072】[0072]

【化39】 [Chemical Formula 39]

【0073】[0073]

【化40】 [Chemical 40]

【0074】[0074]

【表1】 [Table 1]

【0075】[0075]

【表2】 [Table 2]

【0076】実施例5〜7及び比較例5〜8 電荷発生物質として、無金属フタロシアニンの代わりに
オキシチタニウムフタロシアニンを用い、電荷移動物質
としての例示スチルベン化合物化3の代わりに、表3に
示す例示化合物、及び比較化合物化37、化38、化3
9、化40を用いた以外は実施例1と同様に積層感光体
を作成し、実施例1と同様の測定条件で、感光体の繰り
返し特性およびその前後での感度特性評価を行った。結
果を表4に示す。
Examples 5 to 7 and Comparative Examples 5 to 8 Oxytitanium phthalocyanine was used as the charge generating substance instead of the metal-free phthalocyanine, and the example shown in Table 3 was used instead of the exemplified stilbene compound 3 as the charge transfer substance. Compounds and Comparative Compounds 37, 38, 3
A laminated photoreceptor was prepared in the same manner as in Example 1 except that No. 9 and Chemical Formula 40 were used, and the repeating characteristics of the photoreceptor and the sensitivity characteristics before and after that were evaluated under the same measurement conditions as in Example 1. The results are shown in Table 4.

【0077】[0077]

【表3】 [Table 3]

【0078】[0078]

【表4】 [Table 4]

【0079】実施例8〜10及び比較例9〜12 電荷発生物質として、無金属フタロシアニンの代わりに
銅フタロシアニンを用い、電荷移動物質としての例示ス
チルベン化合物化3の代わりに、表5に示す例示化合
物、及び比較化合物化37、化38、化39、化40を
用いた以外は実施例1と同様に積層感光体を作成し、感
度特性測定時の照射光波長を700nmとした以外は、
実施例1と同様の測定条件で、感光体の繰り返し特性お
よびその前後での感度特性評価を行った。結果を表6に
示す。
Examples 8 to 10 and Comparative Examples 9 to 12 Copper phthalocyanine was used as the charge generating substance instead of the metal-free phthalocyanine, and the exemplified compounds shown in Table 5 were used instead of the exemplified stilbene compound compound 3 as the charge transfer substance. , And Comparative Compounds 37, 38, 39 and 40, except that a laminated photoreceptor was prepared in the same manner as in Example 1 except that the irradiation light wavelength at the time of sensitivity characteristic measurement was 700 nm.
Under the same measurement conditions as in Example 1, the repeating characteristics of the photoconductor and the sensitivity characteristics before and after that were evaluated. The results are shown in Table 6.

【0080】[0080]

【表5】 [Table 5]

【0081】[0081]

【表6】 [Table 6]

【0082】実施例11〜13及び比較例13〜16 電荷発生物質として、無金属フタロシアニンの代わりに
ジフェノキシゲルマニウムフタロシアニンを用い、電荷
移動物質としての例示スチルベン化合物化3の代わり
に、表7に示す例示化合物、及び比較化合物化37、化
38、化39、化40を用いた以外は実施例1と同様に
積層感光体を作成し、感度特性測定時の照射光波長を7
25nmとした以外は、実施例1と同様の測定条件で、
感光体の繰り返し特性およびその前後での感度特性評価
を行った。結果を表8に示す。
Examples 11 to 13 and Comparative Examples 13 to 16 As the charge generating substance, diphenoxygermanium phthalocyanine was used in place of the metal-free phthalocyanine, and instead of the exemplified stilbene compound 3 as the charge transfer substance, shown in Table 7. A laminated photoreceptor was prepared in the same manner as in Example 1 except that the exemplified compounds and the comparative compounds of Chemical formula 37, Chemical formula 38, Chemical formula 39, and Chemical formula 40 were used, and the irradiation light wavelength at the time of measuring the sensitivity characteristics was set to 7.
Under the same measurement conditions as in Example 1 except that the thickness was set to 25 nm,
The repeating characteristics of the photoconductor and the sensitivity characteristics before and after the evaluation were evaluated. The results are shown in Table 8.

【0083】[0083]

【表7】 [Table 7]

【0084】[0084]

【表8】 [Table 8]

【0085】[0085]

【発明の効果】以上から明らかなように、本発明によれ
ば高感度で高耐久性を有する電子写真感光体を提供する
ことができる。
As is apparent from the above, according to the present invention, an electrophotographic photosensitive member having high sensitivity and high durability can be provided.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 導電性支持体上に感光層を設けてなる電
子写真感光体において、該感光層内に電荷発生物質とし
てフタロシアニン顔料を含有し、電荷移動物質として下
記一般式化1で示されるスチルベン化合物を含有するこ
とを特徴とする電子写真感光体。 【化1】 (化1中、Arは置換基を有していてもよいアリール基
を示し、R1及びR2は置換基を有していてもよいアルキ
ル基、アラルキル基、アリール基、複素環基を示し、R
3は水素原子または低級アルキル基を示し、R4、R5
及びR6は水素原子または置換基を有していてもよいア
ルキル基、アリール基、複素環基を示し、R7、R8、及
びR9は水素原子、ハロゲン原子、または低級アルキル
基を示す。)
1. An electrophotographic photoreceptor comprising a photosensitive layer provided on a conductive support, wherein the photosensitive layer contains a phthalocyanine pigment as a charge generating substance, and the charge transfer substance is represented by the following general formula 1. An electrophotographic photoreceptor containing a stilbene compound. [Chemical 1] (In Chemical Formula 1, Ar represents an aryl group which may have a substituent, and R 1 and R 2 represent an alkyl group, an aralkyl group, an aryl group and a heterocyclic group which may have a substituent. , R
3 represents a hydrogen atom or a lower alkyl group, R 4 , R 5 ,
And R 6 represents a hydrogen atom or an optionally substituted alkyl group, aryl group, or heterocyclic group, and R 7 , R 8 , and R 9 represent a hydrogen atom, a halogen atom, or a lower alkyl group. . )
JP05011027A 1993-01-26 1993-01-26 Electrophotographic photoreceptor Expired - Fee Related JP3130158B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001207074A (en) * 2000-01-26 2001-07-31 Mitsubishi Paper Mills Ltd Alkenylamine compound and photoreceptor for electrophotography by using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001207074A (en) * 2000-01-26 2001-07-31 Mitsubishi Paper Mills Ltd Alkenylamine compound and photoreceptor for electrophotography by using the same
JP4489891B2 (en) * 2000-01-26 2010-06-23 保土谷化学工業株式会社 Alkenylamine compound and electrophotographic photosensitive member using the same

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