JPS5895744A - Electrophotographic receptor - Google Patents
Electrophotographic receptorInfo
- Publication number
- JPS5895744A JPS5895744A JP19418481A JP19418481A JPS5895744A JP S5895744 A JPS5895744 A JP S5895744A JP 19418481 A JP19418481 A JP 19418481A JP 19418481 A JP19418481 A JP 19418481A JP S5895744 A JPS5895744 A JP S5895744A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- photoreceptor
- photosensitive layer
- conductive
- sensitivity
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/14—Inert intermediate or cover layers for charge-receiving layers
- G03G5/142—Inert intermediate layers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、改良された電子写真感光体に関し、詳しくは
電荷発生層と電荷輸送層からなる積層構造を有する感光
層を設けた積層型電子写真感光体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved electrophotographic photoreceptor, and more particularly to a laminated electrophotographic photoreceptor provided with a photosensitive layer having a laminated structure consisting of a charge generation layer and a charge transport layer. .
ポリビニルカルバゾール、オキサジアゾール、フタロシ
アニン等の有機光導電物質は、セレン、硫化カドミウム
などの無機光導電物質に較べて無公害性、高生産性など
の利点があるが、感度が低い丸め実用化はむずかしかっ
た。そのため、層した機能分1II11感光体を用いる
ことが知られている。Organic photoconductive materials such as polyvinylcarbazole, oxadiazole, and phthalocyanine have advantages such as non-pollution and high productivity compared to inorganic photoconductive materials such as selenium and cadmium sulfide, but their low sensitivity makes it difficult to put them into practical use. It was difficult. For this reason, it is known to use layered functional 1II11 photoreceptors.
電荷発生層は、スーダンレッド、グイアンプル−、ジエ
ナスグリーンBなどのアゾ顔料、アルゴールイエロー、
ビレ/キノン、インダンスレンブリリアントバイオレッ
トRRPなどのキノン顔料、キノシアニン顔料、ペリレ
ン顔料、インジゴ、チオインジゴ等のインジゴ顔料、イ
ンドファーストオレンジトナーなどのビスベンゾイミダ
ゾール顔料、銅フタロシアニンなどのセルロースなどの
結着剤樹脂に分散させて基体上に塗布して形成させたも
のが従来より知られて込る。その場合、電荷発生層を基
体上に直接塗布するよりも基体上に樹脂層を設けて、そ
の上に電荷発生層を塗布する方が好ましい。この樹脂層
は、一般に下引層又は中間層とよげれ、感光層と基体と
の接着性改良、感光層の塗工性向上、基体の保護、基体
上の欠陥の被覆、感光層の電気的破壊の保護、感光層の
キャリア注入性の改良等のために設けられるものである
。The charge generation layer is made of azo pigments such as Sudan Red, Guianpuru, Jenas Green B, Algol Yellow,
Binders such as quinone pigments such as bire/quinone and indanthrene brilliant violet RRP, quinocyanine pigments, perylene pigments, indigo pigments such as indigo and thioindigo, bisbenzimidazole pigments such as India First Orange toner, and cellulose such as copper phthalocyanine. It has been known to form materials by dispersing them in resin and coating them on substrates. In that case, it is preferable to provide a resin layer on the substrate and apply the charge generation layer thereon, rather than directly coating the charge generation layer on the substrate. This resin layer is generally referred to as an undercoat layer or an intermediate layer, and is used to improve adhesion between the photosensitive layer and the substrate, improve coatability of the photosensitive layer, protect the substrate, cover defects on the substrate, and provide electrical protection for the photosensitive layer. This layer is provided for the purpose of protecting the photosensitive layer from damage and improving the carrier injection properties of the photosensitive layer.
この下引層に用いる材料としては、ポリウレタン、ポリ
アミド、ポリビニルアルコール、エポキシ、エチレン−
アクリル酸共重合体、エチレン−酢酸ビニル共重合体、
カゼイン、メチルセル鴛−ス、ニド四セルロース、フェ
ノール樹脂等が知られている。Materials used for this undercoat layer include polyurethane, polyamide, polyvinyl alcohol, epoxy, ethylene-
Acrylic acid copolymer, ethylene-vinyl acetate copolymer,
Casein, methylcellulose, nidotetracellulose, phenolic resin, etc. are known.
このような下引層の材料d1感光体としての感度、耐久
性あるいは感光体の生産性などに大きく寄与している。The material of the undercoat layer d1 greatly contributes to the sensitivity, durability, and productivity of the photoreceptor.
本発明者らは、下引層の拐料を種々に検討した結果、下
引層がポリアミド樹脂と導電性ポリマーとの混合系から
成る場合に、特性が向上することを見出した。すなわち
感度上昇、特に低湿f環境における感度が向上した。The inventors of the present invention investigated various materials for the undercoat layer and found that the characteristics are improved when the undercoat layer is made of a mixed system of polyamide resin and conductive polymer. That is, the sensitivity has increased, especially in a low humidity f environment.
これは、ポリアミド樹脂に導電性ポリマーを混合したこ
とによ抄、下引層の電気抵抗が小さくなるとともに1低
湿f環境においても、抵抗値が大きくならなくなったた
めと考えられる。This is thought to be because the electrical resistance of the paper and undercoat layer was reduced by mixing the conductive polymer with the polyamide resin, and the resistance value did not become large even in a low humidity environment.
また、感光体の耐久性も向上した。Furthermore, the durability of the photoreceptor has also been improved.
本発明の電子写真感光体は、導電性基体上に導電性ポリ
マーとポリアミド樹脂から成る下引き層を形成し、その
上に結着剤樹脂に顔料を分散させた電荷発生層、さらに
その上に電荷輸送層を形成させたことを特徴とする。The electrophotographic photoreceptor of the present invention has an undercoat layer made of a conductive polymer and a polyamide resin formed on a conductive substrate, a charge generation layer made of a binder resin containing a pigment dispersed thereon, and a charge generation layer made of a binder resin with a pigment dispersed thereon. It is characterized by forming a charge transport layer.
以下、本発明について更に説明する。The present invention will be further explained below.
基体としては導電層を有するもpであれば、何れめもの
でもよく、例えdアルミ+=、ラム、黄銅、ステンレス
などの金属を用いることができ、またポリエチレンテレ
フタレート、ポリブチレンテレフタレート、ポリエチレ
ン、ポリプロピレン、ナイロン、ポリスチレンなどの高
分子材料、硬質紙等の材料に導電処置を施したものも用
いることができる。導電処理法として社、例蒸着層を設
ける方法などを挙げることができる。The substrate may be any metal as long as it has a conductive layer, for example metals such as aluminum, ram, brass, stainless steel, polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, etc. , polymer materials such as nylon and polystyrene, and materials such as hard paper that have been subjected to conductive treatment may also be used. Examples of the conductive treatment method include a method of providing a vapor-deposited layer.
また、基体の形状は、円−状、フィルム状または箔状な
どとすることができる。Further, the shape of the substrate can be circular, film-like, foil-like, or the like.
本発明に用いられるボリアオド樹脂は、線状ポリアミド
であり、いわゆるナイロンおよび共重合ナイロンで代表
される。本発明では、溶液にして塗布する丸め、低ない
し非結晶性のものが好ましい。かかる樹脂社、二種以上
のナイロンの原料を混合して共重合により得ることがで
きる。ナイロンの原料としては、例えばナイロン6の原
料であるカブ胃ラフタム、6−アミノカプロン酸、ナイ
シン66.610の原料であるヘキサメチレンジアミン
とアジピン酸、セバシン酸などのジカルボン酸、ナイロ
ン11の原料である11−アミノウンデカン酸、ナイロ
ン12の原料であるω−ラウロラクタム、12−アミノ
ドデカン酸などがあげられ、さらにビス(4−アミノシ
クロヘキシル)メタン、メタキシリレンジアミンもしく
社この水素化物、ピペラジン、2.5−ジメチルピペラ
ジン、トリメチルへキサメチレンジアンンなどのジアミ
ンもあげられる。The boriaod resin used in the present invention is a linear polyamide, and is typified by so-called nylon and copolymerized nylon. In the present invention, a round, low to non-crystalline material that is applied as a solution is preferred. Such resins can be obtained by mixing two or more types of nylon raw materials and copolymerizing them. Raw materials for nylon include, for example, turnip luftam, which is a raw material for nylon 6, 6-aminocaproic acid, hexamethylene diamine, a raw material for nisin 66.610, and dicarboxylic acids such as adipic acid and sebacic acid, and raw materials for nylon 11. Examples include 11-aminoundecanoic acid, ω-laurolactam, which is a raw material for nylon 12, and 12-aminododecanoic acid, as well as bis(4-aminocyclohexyl)methane, metaxylylene diamine or its hydride, piperazine, Diamines such as 2,5-dimethylpiperazine and trimethylhexamethylene diane can also be mentioned.
また、溶解性を良くするために、N−メチル化、N−メ
トキシメチル化され九ナイロンも有用である。Further, in order to improve solubility, N-methylated or N-methoxymethylated nylon is also useful.
ポ
導電性ポリi−としては、アクリルポリマータイプが一
般的である。特に、側鎖にアニオングループや、第四級
アンモニウム塩グループなどのカチオン基、あるいはペ
タイングループを有するものが有効である。ポリアミド
樹脂に対する導電性ポリマーの添加量は、1〜30重量
パーセントが好ましい。この様なポリアミド樹脂と導電
性ポリマーを含有した塗布液を基体の上に塗布すること
によって、下引層を形成することができる。下引層の膜
厚は、1〜10μが適当である。この下引層上に電荷発
生層が形成される。電荷発生層性、前述の顔料を結着剤
樹脂(例えば、ポリビニルブチラール、ポリエステル、
ポリカーボネートなど)中に一分散させてから塗布され
る。分散方法は、結着剤樹脂を適切な溶剤を用いて溶解
し、これに顔料を加え、ボールミル、振動ボールミル、
サンドミル、p−ルミル等の方法で分散することができ
み、塗布厚は、0.1〜1μが好適である。また、電荷
発生層は、顔料の蒸着層あるいはグロー放電によって形
成させたアモルファスシリコン層ヲ用いることもできる
。この電荷発生層の上に、塗布される電荷輸送層は、主
鎖又は側鎖にアントラセン、ピレン、フェナントレン、
コロネンなどの多環芳香族化合物又はインドール、カル
バゾール、オキサゾール、インオキサゾール、チアゾー
ル、イミダゾール、ピラゾール、オキサジアゾール、ピ
ラゾリン、チアジアゾール、トリアゾールなどの含窒素
環式化合物を有する化物
金物、ヒドラゾン化合物、等の電荷輸送性分質それ自身
では成膜性に乏しいためである。As the conductive poly(i-), acrylic polymer type is generally used. Particularly effective are those having an anion group, a cation group such as a quaternary ammonium salt group, or a petaine group in the side chain. The amount of conductive polymer added to the polyamide resin is preferably 1 to 30 percent by weight. A subbing layer can be formed by applying a coating liquid containing such a polyamide resin and a conductive polymer onto a substrate. The thickness of the undercoat layer is suitably 1 to 10 microns. A charge generation layer is formed on this undercoat layer. Charge generation layer properties include the aforementioned pigments and binder resins (e.g. polyvinyl butyral, polyester,
It is applied after being dispersed in a material (such as polycarbonate). The dispersion method involves dissolving the binder resin using an appropriate solvent, adding the pigment, and then using a ball mill, vibrating ball mill, or
It can be dispersed by methods such as sand milling and p-luminescence, and the coating thickness is preferably 0.1 to 1 μm. Further, as the charge generation layer, a pigment vapor deposition layer or an amorphous silicon layer formed by glow discharge can also be used. The charge transport layer coated on this charge generation layer includes anthracene, pyrene, phenanthrene, etc. in the main chain or side chain.
Compounds containing polycyclic aromatic compounds such as coronene or nitrogen-containing cyclic compounds such as indole, carbazole, oxazole, inoxazole, thiazole, imidazole, pyrazole, oxadiazole, pyrazoline, thiadiazole, triazole, hydrazone compounds, etc. This is because the charge-transporting substance itself has poor film-forming properties.
このような樹脂としては、ポリエステル、ポリサルホン
、ポリカーボネート、ポリメタクリル酸エステル、ポリ
スチレン等があげられる。Examples of such resins include polyester, polysulfone, polycarbonate, polymethacrylate, polystyrene, and the like.
電荷輸送層の厚さは、5〜20μが適当である。The thickness of the charge transport layer is suitably 5 to 20 microns.
次に、具体的な実施例を示し、本発明を更に説明する。Next, the present invention will be further explained by showing specific examples.
実施例1
ナイロン6/66/610/12の共重合ナイロンであ
るポリアミド樹脂10部を60部のメタノールと30部
のトリクレンの混合溶剤に溶解し、これにカチオン性ア
クリルポリマー(商品名:ニレコンドPQ−10綜研化
学製)2部を加え、下引層塗布液を作成した。80φ×
360■ のアルミヨウムシリンダ−に、上記塗布液を
浸漬法で塗布し、100°010分間、加熱乾燥し膜厚
2μの下引層を形成した。次に、下記構造式のビスアゾ
顔料10部、
ポリビニルブチラール樹脂(商品名:ニスレックスBM
−1、積木化学製)5部、シクロヘキサノン40部およ
びメチルエチルケトン20部を1φガラスピーズを用い
たサンドミル装置で2時間処理し、顔料分散液を調製し
た。この液を上記下引層上に浸漬塗布し、100.’O
110分間の加熱乾燥を行ない、膜厚01.2μの電荷
発生層を設けた。Example 1 10 parts of a polyamide resin, which is a copolymerized nylon of nylon 6/66/610/12, was dissolved in a mixed solvent of 60 parts of methanol and 30 parts of trichlene, and a cationic acrylic polymer (trade name: Nirecondo PQ) was dissolved in this. -10 (manufactured by Soken Kagaku) were added to prepare a subbing layer coating solution. 80φ×
The above coating solution was applied by dipping onto a 360 mm aluminum cylinder and dried by heating at 100 DEG C. for 10 minutes to form a subbing layer with a thickness of 2 .mu.m. Next, 10 parts of bisazo pigment with the following structural formula, polyvinyl butyral resin (product name: Nislex BM
5 parts of cyclohexanone, 40 parts of cyclohexanone, and 20 parts of methyl ethyl ketone were processed for 2 hours in a sand mill apparatus using 1φ glass beads to prepare a pigment dispersion. This solution was dip coated onto the undercoat layer, and 100. 'O
Heat drying was performed for 110 minutes to form a charge generation layer with a thickness of 01.2 μm.
次に、電荷発生層の上に1−〔ビリジルー(2)〕−3
−(4−N、N−ジエチルアミノスチリル)−5−(4
−N、N−ジエチルアミノフェニル)ピラゾリン10部
、ポリサルホン樹脂(商品名ニューデルP−1700.
UCC社製)10部およびモノクロルベンゼン70部か
ら成る溶液を、浸漬法にて塗布し、100℃20分間加
熱乾燥して、膜厚12μの電荷輸送層を形成した。得ら
れた感光体を感光体−(L)とする。Next, apply 1-[virigiru (2)]-3 on the charge generation layer.
-(4-N,N-diethylaminostyryl)-5-(4
-N,N-diethylaminophenyl)pyrazoline 10 parts, polysulfone resin (trade name Newdel P-1700.
A solution consisting of 10 parts (manufactured by UCC) and 70 parts of monochlorobenzene was applied by a dipping method and dried by heating at 100° C. for 20 minutes to form a charge transport layer with a thickness of 12 μm. The obtained photoreceptor is referred to as photoreceptor (L).
実施例2
導電性ポリマーとしてアニオン型ポリマー(商品名二ケ
ミスタット6120.三洋化成製)をた
用い′%はかは、実施例1と同様にして感光体を製造し
、これを感光体−(璽)とする。Example 2 A photoreceptor was produced in the same manner as in Example 1, using an anionic polymer (trade name: Nichemistat 6120, manufactured by Sanyo Chemical) as the conductive polymer, and this was used as a photoreceptor. ).
実施例3
N−メトキシメチル化ナイロン樹脂10部をメタノール
70部とトルエン20部に溶解し、これにカチオン性ア
クリルポリマ=(商品名:ニレコンドPQ−10、綜研
化学■製)1部を加え、下引層塗布液を調製した。アル
ミニウム蒸着を施し九二軸延伸ポリエチレンテレフタレ
ートフィルム上に、上記塗布液をロールコータ−により
塗布し3μの膜厚の下引層を形成した。Example 3 10 parts of N-methoxymethylated nylon resin was dissolved in 70 parts of methanol and 20 parts of toluene, and 1 part of cationic acrylic polymer (trade name: Nirecondo PQ-10, manufactured by Soken Kagaku ■) was added thereto. A subbing layer coating solution was prepared. The above coating solution was applied using a roll coater onto a 92-axis stretched polyethylene terephthalate film subjected to aluminum vapor deposition to form a subbing layer having a thickness of 3 μm.
次に、下記構造式のビスアゾ顔料10部を塩化ビニル−
酢酸ビニルコポリマー(商品名二部およびメチルイソブ
チルケトン40部に加え、1φガラスピーズを用いたサ
ンド2ル装置で2時間分散した。この分散液にメチルエ
チルケトン40部を加えて、上記下引層上にロールコー
タ−で塗布し、膜厚0.2μの電荷発生層を形成した。Next, 10 parts of a bisazo pigment having the following structural formula was added to vinyl chloride.
In addition to 2 parts of vinyl acetate copolymer (trade name) and 40 parts of methyl isobutyl ketone, the mixture was dispersed for 2 hours using a sand 2 mill apparatus using 1φ glass beads. 40 parts of methyl ethyl ketone was added to this dispersion, and the mixture was coated on the undercoat layer. Coating was performed using a roll coater to form a charge generation layer having a thickness of 0.2 μm.
次いで、下記構造式のヒドラゾン染料12部、ボリアリ
レート樹脂(商品名:[J−100,二二チカ製)10
部を七ツク四ルベンゼン50部とトルエン50部に溶解
し、この液を電荷発生層上に塗布して、膜厚15IMの
電荷輸送層を形成させた。このようにして電子写真感光
シートを作成し、これを感光体−(2)とする。Next, 12 parts of hydrazone dye having the following structural formula, 10 parts of polyarylate resin (trade name: [J-100, manufactured by Nijichika)
A portion of the sample was dissolved in 50 parts of tetrabenzene and 50 parts of toluene, and this solution was applied onto the charge generation layer to form a charge transport layer with a thickness of 15 IM. In this manner, an electrophotographic photosensitive sheet was prepared, and this was designated as photoreceptor-(2).
比較例1
比較感光体として、アルミニウムシリンダー上に下引層
を設けないで、実施例1における電荷発生層と電荷輸送
層を各々形成し、これを比較感光体とした。Comparative Example 1 As a comparative photoreceptor, the charge generation layer and the charge transport layer in Example 1 were each formed on an aluminum cylinder without providing a subbing layer, and this was used as a comparative photoreceptor.
測定
実施例1〜3で製造し良電子写真感光体(I)〜(2)
及び比較例1で製造し九比較感光体を−5,6KVのコ
ロナ帯電9画儂露光、乾式トナー現像、普通紙へのトナ
ー転写、ウレタンゴムブレード(硬$ 70@、圧力5
gW/6IB、感光体に対する角度20′″)による
クリーニングエ橿等を有する電子写真複写機に取り付け
て特性を評価した8表1K、初期における感度、及び3
000回のくや返し耐久試験後における感度を示す。Good electrophotographic photoreceptors (I) to (2) manufactured in Measurement Examples 1 to 3
And nine comparative photoreceptors manufactured in Comparative Example 1 were exposed to -5.6 KV corona charging, nine strokes, dry toner development, toner transfer to plain paper, urethane rubber blade (hardness $70@, pressure 5
gW/6IB, angle 20'' with respect to the photoreceptor) 8 Table 1K, initial sensitivity, and 3
The sensitivity is shown after 000 repetition durability tests.
表1
表1から判るとおり、本発明の電子写真感光体(感光体
1〜m)は、低湿時における感度低下がほとんどなく、
また耐久後、における画質の低下はなく、シかも感光体
の外観においても感光層の剥離は、全く認められなかっ
た。゛特許出願人 キャノン株式会社
283Table 1 As can be seen from Table 1, the electrophotographic photoreceptors of the present invention (photoreceptors 1 to m) have almost no decrease in sensitivity at low humidity.
Further, after durability, there was no deterioration in image quality, and no peeling of the photosensitive layer was observed in the appearance of the photoreceptor.゛Patent applicant Canon Co., Ltd. 283
Claims (1)
ーを含有する下引層を設けたことを特徴とする電子写真
感光体。An electrophotographic photoreceptor characterized in that an undercoat layer containing a polyimide resin and a conductive polymer is provided between a conductive layer and a photosensitive layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19418481A JPS5895744A (en) | 1981-12-02 | 1981-12-02 | Electrophotographic receptor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19418481A JPS5895744A (en) | 1981-12-02 | 1981-12-02 | Electrophotographic receptor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5895744A true JPS5895744A (en) | 1983-06-07 |
JPH0259458B2 JPH0259458B2 (en) | 1990-12-12 |
Family
ID=16320333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19418481A Granted JPS5895744A (en) | 1981-12-02 | 1981-12-02 | Electrophotographic receptor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5895744A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62160463A (en) * | 1986-01-09 | 1987-07-16 | Ricoh Co Ltd | Electrophotographic sensitive body |
JPH01118847A (en) * | 1987-11-02 | 1989-05-11 | Hitachi Chem Co Ltd | Electrophotographic sensitive body |
US7097950B2 (en) | 2004-05-27 | 2006-08-29 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus |
JP2008248145A (en) * | 2007-03-30 | 2008-10-16 | Canon Inc | Method for producing dispersion liquid, the dispersion liquid, dispersion liquid for coating electrophotographic photoreceptor using the dispersion liquid, electrophotographic photoreceptor formed by using the dispersion liquid for coating electrophotographic photoreceptor, process cartridge, and electrophotographic device |
-
1981
- 1981-12-02 JP JP19418481A patent/JPS5895744A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62160463A (en) * | 1986-01-09 | 1987-07-16 | Ricoh Co Ltd | Electrophotographic sensitive body |
JPH01118847A (en) * | 1987-11-02 | 1989-05-11 | Hitachi Chem Co Ltd | Electrophotographic sensitive body |
US7097950B2 (en) | 2004-05-27 | 2006-08-29 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus |
US7452644B2 (en) | 2004-05-27 | 2008-11-18 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus |
EP2264539A1 (en) | 2004-05-27 | 2010-12-22 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus |
JP2008248145A (en) * | 2007-03-30 | 2008-10-16 | Canon Inc | Method for producing dispersion liquid, the dispersion liquid, dispersion liquid for coating electrophotographic photoreceptor using the dispersion liquid, electrophotographic photoreceptor formed by using the dispersion liquid for coating electrophotographic photoreceptor, process cartridge, and electrophotographic device |
Also Published As
Publication number | Publication date |
---|---|
JPH0259458B2 (en) | 1990-12-12 |
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