JPH01177551A - Electrophotographic sensitive body - Google Patents
Electrophotographic sensitive bodyInfo
- Publication number
- JPH01177551A JPH01177551A JP72688A JP72688A JPH01177551A JP H01177551 A JPH01177551 A JP H01177551A JP 72688 A JP72688 A JP 72688A JP 72688 A JP72688 A JP 72688A JP H01177551 A JPH01177551 A JP H01177551A
- Authority
- JP
- Japan
- Prior art keywords
- charge transport
- charge
- polycarbonate resin
- layer
- transport layer
- 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.)
- Pending
Links
- 239000004431 polycarbonate resin Substances 0.000 claims abstract description 35
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005668 polycarbonate resin Polymers 0.000 claims abstract description 27
- 239000011230 binding agent Substances 0.000 claims abstract description 25
- 239000000178 monomer Substances 0.000 claims abstract description 18
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 3
- 125000000217 alkyl group Chemical group 0.000 claims abstract 2
- 108091008695 photoreceptors Proteins 0.000 claims description 30
- 239000000126 substance Substances 0.000 claims description 10
- 125000005843 halogen group Chemical group 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 claims 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 16
- 239000002904 solvent Substances 0.000 abstract description 11
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 2
- 229910052736 halogen Inorganic materials 0.000 abstract 2
- 150000002367 halogens Chemical class 0.000 abstract 2
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 abstract 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 79
- 230000032258 transport Effects 0.000 description 50
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 229920000402 bisphenol A polycarbonate polymer Polymers 0.000 description 9
- 229920000515 polycarbonate Polymers 0.000 description 7
- 239000004417 polycarbonate Substances 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- -1 etc. Substances 0.000 description 6
- 239000000049 pigment Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 229920004011 Macrolon® Polymers 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 206010034972 Photosensitivity reaction Diseases 0.000 description 4
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 230000036211 photosensitivity Effects 0.000 description 4
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- QGKMIGUHVLGJBR-UHFFFAOYSA-M (4z)-1-(3-methylbutyl)-4-[[1-(3-methylbutyl)quinolin-1-ium-4-yl]methylidene]quinoline;iodide Chemical compound [I-].C12=CC=CC=C2N(CCC(C)C)C=CC1=CC1=CC=[N+](CCC(C)C)C2=CC=CC=C12 QGKMIGUHVLGJBR-UHFFFAOYSA-M 0.000 description 1
- 150000003920 1,2,4-triazines Chemical class 0.000 description 1
- AXSVCKIFQVONHI-UHFFFAOYSA-N 2,3-bis(4-methoxyphenyl)-1-benzofuran-6-ol Chemical compound C1=CC(OC)=CC=C1C1=C(C=2C=CC(OC)=CC=2)C2=CC=C(O)C=C2O1 AXSVCKIFQVONHI-UHFFFAOYSA-N 0.000 description 1
- WGRSVHBSCVGKDP-UHFFFAOYSA-N 2-ethyl-9h-carbazole-1-carbaldehyde Chemical compound C1=CC=C2C3=CC=C(CC)C(C=O)=C3NC2=C1 WGRSVHBSCVGKDP-UHFFFAOYSA-N 0.000 description 1
- OMXSHNIXAVHELO-UHFFFAOYSA-N 2-phenyl-4-(2-phenylethenyl)quinazoline Chemical compound C=1C=CC=CC=1C=CC(C1=CC=CC=C1N=1)=NC=1C1=CC=CC=C1 OMXSHNIXAVHELO-UHFFFAOYSA-N 0.000 description 1
- FJBAOOGKMNJJGK-UHFFFAOYSA-N 4-(1,3-dihydropyrazol-2-yl)-n,n-diethylaniline Chemical compound C1=CC(N(CC)CC)=CC=C1N1NC=CC1 FJBAOOGKMNJJGK-UHFFFAOYSA-N 0.000 description 1
- UZGVMZRBRRYLIP-UHFFFAOYSA-N 4-[5-[4-(diethylamino)phenyl]-1,3,4-oxadiazol-2-yl]-n,n-diethylaniline Chemical compound C1=CC(N(CC)CC)=CC=C1C1=NN=C(C=2C=CC(=CC=2)N(CC)CC)O1 UZGVMZRBRRYLIP-UHFFFAOYSA-N 0.000 description 1
- PLAZXGNBGZYJSA-UHFFFAOYSA-N 9-ethylcarbazole Chemical compound C1=CC=C2N(CC)C3=CC=CC=C3C2=C1 PLAZXGNBGZYJSA-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical group O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 150000001716 carbazoles Chemical class 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000001907 coumarones Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 150000002081 enamines Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000007857 hydrazones Chemical class 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- ISGXOWLMGOPVPB-UHFFFAOYSA-N n,n-dibenzylaniline Chemical compound C=1C=CC=CC=1CN(C=1C=CC=CC=1)CC1=CC=CC=C1 ISGXOWLMGOPVPB-UHFFFAOYSA-N 0.000 description 1
- KKFHAJHLJHVUDM-UHFFFAOYSA-N n-vinylcarbazole Chemical compound C1=CC=C2N(C=C)C3=CC=CC=C3C2=C1 KKFHAJHLJHVUDM-UHFFFAOYSA-N 0.000 description 1
- YRZZLAGRKZIJJI-UHFFFAOYSA-N oxyvanadium phthalocyanine Chemical compound [V+2]=O.C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 YRZZLAGRKZIJJI-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- RCYFOPUXRMOLQM-UHFFFAOYSA-N pyrene-1-carbaldehyde Chemical compound C1=C2C(C=O)=CC=C(C=C3)C2=C2C3=CC=CC2=C1 RCYFOPUXRMOLQM-UHFFFAOYSA-N 0.000 description 1
- WVIICGIFSIBFOG-UHFFFAOYSA-N pyrylium Chemical class C1=CC=[O+]C=C1 WVIICGIFSIBFOG-UHFFFAOYSA-N 0.000 description 1
- 150000003246 quinazolines Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0528—Macromolecular bonding materials
- G03G5/0557—Macromolecular bonding materials obtained otherwise than by reactions only involving carbon-to-carbon unsatured bonds
- G03G5/0564—Polycarbonates
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電荷発生層及び電荷輸送層を積層してなる電
子写真用感光体に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrophotographic photoreceptor comprising a charge generation layer and a charge transport layer laminated.
従来の技術
近年、電子写真用感光体として、有機光導電物質を用い
たものが用いられるようになってきており、そして、導
電性支持体上に少なくとも露光により電荷を発生する電
荷発生層と電荷を輸送する電荷輸送層との２層を有する
積層型電子写真感光体が主流になっている。BACKGROUND OF THE INVENTION In recent years, electrophotographic photoreceptors using organic photoconductive substances have come to be used, and a charge generation layer and a charge generation layer that generate charges at least upon exposure to light have been used on a conductive support. A laminated electrophotographic photoreceptor having two layers, a charge transport layer and a charge transport layer that transports charge, has become mainstream.
有機光導電物質が低分子物質でおる場合には、感光体と
しての層形成のために高分子物質と混合して用いること
が行われているが、このような高分子物質として、ビス
フェノールＡから作られる後記構造式（Ｉ＞で示される
単量体単位で構成されるポリカーボネートが、優れた機
械的特性、透明性、及び各種溶剤への溶解性を有し、又
、感光体作成時の塗布に便利であるなどの優れた特性を
有するためによく用いられている。When the organic photoconductive substance is a low-molecular substance, it is mixed with a polymer substance to form a layer as a photoreceptor. The produced polycarbonate composed of monomer units represented by the structural formula (I> below) has excellent mechanical properties, transparency, and solubility in various solvents, and also has excellent coating properties during the production of photoreceptors. It is often used because it has excellent properties such as convenience.
ところが、従来のポリカーボネートは上記のような長所
を有するにもかかわらず、それを用いた積層型の電子写
真感光体を長期間使用している場合に、次第に感光体中
の残留電位が増加し、コピー画像においてカブリと呼ば
れる地汚れを生じてくるという問題がある。However, although conventional polycarbonate has the above-mentioned advantages, when a laminated electrophotographic photoreceptor made of polycarbonate is used for a long period of time, the residual potential in the photoreceptor gradually increases. There is a problem in that a background stain called fog occurs in the copied image.
特に、電荷輸送層を上層とし、その結着樹脂として、ビ
スフェノールＡ型ポリカーボネート樹脂を使用して作成
した感光体においては、比較的初期には良好な特性を有
するものの、感光体取扱時に付着した手の油分、あるい
はその他の油分、あるいは複写機内のもろもろの使用環
境、たとえば多湿雰囲気、種々の部材との摺擦、コロナ
放電等により、最上層を形成する電荷輸送層の表面性が
変化し、輸送層中に存在していた電荷輸送材料が電荷輸
送層表面に結晶析出化してきたり、ソルベントクラック
が発生してくるという現象が生じてしまう。このことは
電荷輸送層中に含有される、電荷輸送材料の含有量を実
質的に減少せしめることとなり、電子写真複写機等で繰
り返し使用した場合には、次第に電荷輸送能が低下する
ことになり、電荷輸送層としての機能が低下し、感光体
中の残留電位が次第に増加し、コピー画像としてはカブ
リと呼ばれる地汚れを生ずることになる。In particular, photoreceptors made with a charge transport layer as an upper layer and using bisphenol A polycarbonate resin as the binder resin have good properties at a relatively early stage, but they are prone to stains that stick to the photoreceptors when they are handled. The surface properties of the charge transport layer that forms the top layer change due to oil content or other oil content, or the various usage environments inside the copying machine, such as a humid atmosphere, rubbing against various parts, corona discharge, etc. A phenomenon occurs in which the charge transport material existing in the layer crystallizes on the surface of the charge transport layer and solvent cracks occur. This substantially reduces the content of the charge transport material contained in the charge transport layer, and when used repeatedly in an electrophotographic copying machine, etc., the charge transport ability gradually decreases. , the function as a charge transport layer deteriorates, and the residual potential in the photoreceptor gradually increases, resulting in background smearing called fog in copied images.
この様な問題点を解決するために、後記構造式（ＩＩ＞
で示される単量体単位で構成されるポリカーボネート樹
脂を使用することが提案されている。In order to solve such problems, the structural formula (II>
It has been proposed to use a polycarbonate resin composed of monomer units represented by:
（特開昭６１−６２０３９、同６１−６２０４０号公報
）発明が解決しようとする課題
しかしながら、電荷輸送層における結着樹脂として、構
造式（ＩＩ＞で示される単量体単位で構成されるポリカ
ーボネート樹脂を使用した場合、電荷発生層に使用する
結着樹脂の種類により、幾つかの問題が生じることが明
らかになった。(JP-A-61-62039 and JP-A No. 61-62040) Problems to be Solved by the Invention However, as a binder resin in the charge transport layer, polycarbonate composed of monomer units represented by the structural formula (II>) It has become clear that when resins are used, several problems arise depending on the type of binder resin used in the charge generation layer.
第１の問題点は、電荷発生層が光照射されることによっ
て生成した電荷キャリアの電荷輸送層への注入効率が悪
くなることである。その結果、電子写真感光体の光感度
が減少する。The first problem is that the charge carriers generated by the charge generation layer being irradiated with light are injected into the charge transport layer less efficiently. As a result, the photosensitivity of the electrophotographic photoreceptor decreases.
第２の問題点は、電子写真感光体を繰り返し帯電、露光
を行った場合に、帯電電位及び光照射部電位の変動が現
れることである。これらの電位の変動は、画質上、いわ
ゆる、かぶり及び画像濃度の変動として現れる。The second problem is that when an electrophotographic photoreceptor is repeatedly charged and exposed, variations in the charging potential and the potential of the light irradiated part appear. These potential fluctuations appear as so-called fogging and fluctuations in image density in terms of image quality.
本発明は上記のような事情にかんがみてなされたもので
ある。The present invention has been made in view of the above circumstances.
したがって、本発明の目的は、上記のように電荷輸送層
の結晶化及びソルベントクラックの発生を防ぎ、電荷発
生層で生成されたキャリアを効率よく電荷輸送層に注入
させ、複写機に装着して連続使用した場合でも、高感度
で長時間安定した画質の画像を得ることができる電子写
真感光体を提供することにある。Therefore, an object of the present invention is to prevent crystallization and solvent cracks in the charge transport layer as described above, to efficiently inject carriers generated in the charge generation layer into the charge transport layer, and to prevent the charge transport layer from being installed in a copying machine. It is an object of the present invention to provide an electrophotographic photoreceptor capable of obtaining images with high sensitivity and stable image quality for a long time even when used continuously.
課題を解決するための手段及び作用
ポリカーボネート樹脂は、構造中に炭酸エステル型構造
を有する下記一般式で示されるもの′であり、
（式中Ａは二価の有機基である）
式中Ａを種々のもので置換することにより、機械的強度
や化学的特性を変化させることができ、電子写真感光体
の結着樹脂として有用なものになるが、本発明者らは、
研究の結果、電荷発生層と電荷輸送層における結着樹脂
とにおいて、特定のポリカーボネートを組み合わせて使
用した場合に優れた結果が得られることを見出だし、本
発明を完成するに至った。A polycarbonate resin having a carbonate type structure in its structure is represented by the following general formula (wherein A is a divalent organic group), where A is a divalent organic group. By replacing it with various substances, the mechanical strength and chemical properties can be changed, making it useful as a binder resin for electrophotographic photoreceptors.
As a result of research, it was discovered that excellent results can be obtained when specific polycarbonates are used in combination in the charge generation layer and the binder resin in the charge transport layer, and the present invention has been completed.
本発明は、導電性支持体上に、少なくとも電荷発生層と
電荷輸送層とを有する電子写真感光体において、電荷発
生層における結着樹脂が、下記溝造式（Ｉ’）で示され
る単量体単位で構成されるポリカーボネート樹脂よりな
り、電荷輸送層における結着樹脂が、下記構造式（ＩＩ
＞で示される単量体単位で構成されるポリカーボネート
樹脂よりなることを特徴とする。The present invention provides an electrophotographic photoreceptor having at least a charge generation layer and a charge transport layer on a conductive support, in which a binder resin in the charge generation layer has a monomer content represented by the following groove structure formula (I'). The binder resin in the charge transport layer has the following structural formula (II
It is characterized by being made of a polycarbonate resin composed of monomer units shown by >.
（式中、Ｘ及びＸ′は水素原子、ハロゲン原子又はメチ
ル基を表わし、Ｒは水素原子、ハロゲン原子、水酸基、
カルボキシル基、アセチル基又は炭素数１〜５のアルキ
ル基を表わす）
以下、本発明の電子写真感光体について詳記する。(In the formula, X and X' represent a hydrogen atom, a halogen atom, or a methyl group, and R represents a hydrogen atom, a halogen atom, a hydroxyl group,
The electrophotographic photoreceptor of the present invention will be described in detail below.
本発明の電子写真用感光体において、導電性支持体とし
ては、アルミニウム、真ちゅう、銅、ニッケル、ステン
レス鋼のような金属板、あるいは金属シートのみならず
、プラスチックシート上にアルミニウム、ニッケル、ク
ロム、パラジウム、グラフフィト等の導電性物質を蒸着
、スパッタリング、塗布等によりコーティングし導電化
処理を施したもの、あるいはガラス、プラスチック板、
布、紙などを導電処理したもの等が使用できる。In the electrophotographic photoreceptor of the present invention, the conductive support is not only a metal plate such as aluminum, brass, copper, nickel, or stainless steel, or a metal sheet, but also a plastic sheet made of aluminum, nickel, chromium, etc. Materials coated with conductive substances such as palladium or graphite by vapor deposition, sputtering, coating, etc., or glass, plastic plates, etc.
Cloth, paper, etc. that have been treated with conductivity can be used.
導電性支持体上には、電荷発生層が形成されるが、電荷
発生層は、電荷発生材料を、結着樹脂として上記構造式
（Ｉ＞で示される単量体単位で構成されるビスフェノー
ルＡポリカーボネート樹脂中に分散させてなるものであ
る。電荷発生材料としては、公知のものならばどの様な
ものでも使用でき、例えば、非晶質セレン、三方晶セレ
ン、酸化亜鉛、酸化チタン、セレンーデルル合金、Ａｓ
２Ｓｅ２、金属−無金属フタロシアニン、スクェアリウ
ム顔料、アゾ顔料、アントキノン顔料、ピレン、ペリレ
ン、アントラセン、ピリリウム塩、チアピリリウム塩、
シアニン顔料等をあげることができる。A charge generation layer is formed on the conductive support, and the charge generation layer is made of bisphenol A composed of monomer units represented by the above structural formula (I>) using a charge generation material as a binder resin. It is dispersed in polycarbonate resin.Any known charge generating material can be used, such as amorphous selenium, trigonal selenium, zinc oxide, titanium oxide, and selenium-derel alloy. , As
2Se2, metal-free metal phthalocyanine, squareium pigment, azo pigment, anthracene pigment, pyrene, perylene, anthracene, pyrylium salt, thiapyrylium salt,
Examples include cyanine pigments.
又、上記構造式（Ｉ）で示される単量体単位で構成され
るポリカーボネート樹脂としては、平均分子量１万〜６
万のものが有利に使用できる。In addition, the polycarbonate resin composed of monomer units represented by the above structural formula (I) has an average molecular weight of 10,000 to 6
Ten thousand things can be used to advantage.
電荷発生層は、上記ポリカーボネート樹脂を溶剤に溶解
さ、電荷発生材料を分散させて得られた塗布液を塗布す
ることによって形成される。電荷発生材料とポリカーボ
ネート樹脂とは、１：９〜９二１の範囲に配合するのが
好ましい。又電荷発生層の膜厚は、０．０５〜５μｍに
設定するのが好ましい。The charge generation layer is formed by dissolving the polycarbonate resin in a solvent and dispersing the charge generation material therein, and applying a coating solution. The charge generating material and the polycarbonate resin are preferably blended in a ratio of 1:9 to 9:21. Further, the thickness of the charge generation layer is preferably set to 0.05 to 5 μm.
電荷発生層の上には、電荷輸送層が形成される。A charge transport layer is formed on the charge generation layer.
電荷輸送層は、電荷輸送材料を上記構造式（ＩＩ）で示
される単量体単位で構成されるポリカーボネート樹脂に
含有させてなるもので、上記ポリカーボネートは平均分
子量１万〜６万であることが好ましい。The charge transport layer is made by containing a charge transport material in a polycarbonate resin composed of monomer units represented by the above structural formula (II), and the above polycarbonate may have an average molecular weight of 10,000 to 60,000. preferable.
上記構造式（ＩＩ＞で示される単量体単位で構成される
ポリカーボネートの代表的なものとしては、例えば、次
の例示構造式で示されるものがあげられる。Typical polycarbonates composed of monomer units represented by the above structural formula (II>) include those represented by the following exemplary structural formula.
＝ １１ −
（式中 ｎは重合度を表わす）
電荷輸送材料としては電荷輸送材料としては、２．５−
ビス（ｐ−ジエチルアミノフェニル）−１，３，４−オ
キサジアゾールなどのオキサジアゾール誘導体、１，３
．５−トリフェニル−ピラゾリン、１−［ピリジル−（
２）］ −３−（ｐ−ジエチルアミノスチリル）−５−
（ｐ−ジエチルアミノフェニル）ピラゾリンなどのピラ
ゾリン誘導体、トリフェニルアミン、ジベンジルアニリ
ンなどの芳香族第３級アミン化合物、Ｎ、Ｎ’ −ジフ
ェニル−Ｎ、Ｎ’ −ビス（３−メチルフェニル〉−［
１，１−ビフェニルコー４，４′−ジアミンなどの芳香
族第３級ジアミノ化合物、３− （４’一ジメチルアミ
ノフェニル）−５，６−ジー（４′−メトキシフェニル
）−１，２，４−トリアジンなどの１，２，４−トリア
ジン誘導体、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などのヒドラゾン誘導体、
２−フェニル−４−スチリル−キナゾリンなどのキナゾ
リン誘導体、６−ヒドロキシ−２，３−ジ（ｐ−メトキ
シフェニル）−ベンゾフランなどのベンゾフラン誘導体
、ｐ−（２，２−ジフェニルビニルｉＮ、Ｎ−ジフェニ
ルアニリンなどのα−スチルベン誘導体、「ジャーナル
・オブ・イメージングφサイエンスＪ （Ｊｏｕｒｎ
ａｌ ｏｆ ＩｍａｇｉｎｇＳｃｉｅｎｃｅ ） ２９
： ７〜１０（１９８５）に記載されているエナミン
誘導体、Ｎ−エチルカルバゾールなどのカルバゾール誘
導体、ポリ−Ｎ−ビニルカルバゾールなどのポリ−Ｎ−
ビニルカルバゾール及びその誘導体、ポリーγ−カルバ
ゾリルエチルグルタナート及びその誘導体、更にはピレ
ン、ポリビニルピレン、ポリビニルアントラセン、ポリ
ビニルアクリジン、ポリ−９−ビフェニルアントラセン
、ピレン−ホルムアルデヒド樹脂、エチルカルバゾール
−ホルムアルデヒド樹脂などの公知の電荷輸送材料を用
いることができるが、これらに限定されるものではない
。また、これらの電荷輸送材料は単独あるいは２種類以
上混合して用いることができる。= 11 - (in the formula, n represents the degree of polymerization) As a charge transport material, as a charge transport material, 2.5 -
Oxadiazole derivatives such as bis(p-diethylaminophenyl)-1,3,4-oxadiazole, 1,3
．． 5-triphenyl-pyrazoline, 1-[pyridyl-(
2)] -3-(p-diethylaminostyryl)-5-
Pyrazoline derivatives such as (p-diethylaminophenyl)pyrazoline, aromatic tertiary amine compounds such as triphenylamine and dibenzylaniline, N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[
Aromatic tertiary diamino compounds such as 1,1-biphenyl-4,4'-diamine, 3-(4'-dimethylaminophenyl)-5,6-di(4'-methoxyphenyl)-1,2, 1,2,4-triazine derivatives such as 4-triazine, 4-diethylaminobenzaldehyde-1
, hydrazone derivatives such as 1-diphenylhydrazone,
Quinazoline derivatives such as 2-phenyl-4-styryl-quinazoline, benzofuran derivatives such as 6-hydroxy-2,3-di(p-methoxyphenyl)-benzofuran, p-(2,2-diphenylvinyl iN, N-diphenyl α-Stilbene derivatives such as aniline, “Journal of Imaging φScience J
al of Imaging Science) 29
: Enamine derivatives described in 7-10 (1985), carbazole derivatives such as N-ethylcarbazole, and poly-N- such as poly-N-vinylcarbazole.
Vinyl carbazole and its derivatives, poly γ-carbazolylethyl glutanate and its derivatives, as well as pyrene, polyvinylpyrene, polyvinylanthracene, polyvinylacridine, poly-9-biphenylanthracene, pyrene-formaldehyde resin, ethylcarbazole-formaldehyde resin, etc. Any of the known charge transport materials can be used, but is not limited thereto. Further, these charge transport materials can be used alone or in combination of two or more kinds.
電荷輸送層は、上記構造式（ＩＩ＞で示される単量体単
位で構成されるポリカーボネート樹脂と電荷輸送材料と
を溶剤に溶解さて得られた塗布液を電荷発生層の上に塗
布することによって形成される。電荷輸送材料と上記ポ
リカーボネート樹脂とは、１：９〜９：１の範囲に配合
するのが好ましい。又電荷輸送層の膜厚は、１〜５０１
１ｍに設定するのが好ましい。The charge transport layer is formed by dissolving a polycarbonate resin composed of monomer units represented by the above structural formula (II>) and a charge transport material in a solvent and applying a coating solution on the charge generation layer. The charge transport material and the polycarbonate resin are preferably blended in a ratio of 1:9 to 9:1.The thickness of the charge transport layer is preferably 1 to 50%.
It is preferable to set it to 1 m.
本発明の電子写真感光体においては、必要に応じて、導
電性支持体と電荷発生層の間に接着性を改善するための
接着層、あるいは導電性支持体から電荷発生層への電荷
の注入を防ぐための注入阻止層を設けてもよく、更には
電荷輸送層の表面に、表面の機械的、化学的劣化を防ぐ
ための表面保護層あるいはそれに伴なう中間層を設けて
もよい。In the electrophotographic photoreceptor of the present invention, if necessary, an adhesive layer is provided between the conductive support and the charge generation layer to improve adhesion, or charge is injected from the conductive support to the charge generation layer. An injection blocking layer may be provided to prevent this, and furthermore, a surface protective layer or an accompanying intermediate layer may be provided on the surface of the charge transport layer to prevent mechanical or chemical deterioration of the surface.
作用
電子写真感光体に要求される特性としては、表面の機械
的強度が高いものであることが必要であり、電気的特性
の点では、暗所において表面の電荷保持性がよく、かつ
、光照射時には、電荷発生層で生成したキャリアが空間
電荷を蓄えることなく、電荷輸送層に注入されるように
イオン化ポテンシャルが調整されていることが必要であ
る。又、製造上からの要求としては、電荷発生層が電荷
輸送層の溶剤に溶解又は侵されることなく、安定に成膜
できるような溶剤の選択ができることでおる。The properties required for a functional electrophotographic photoreceptor include that the surface has high mechanical strength, and in terms of electrical properties, the surface should have good charge retention in the dark and be resistant to light. During irradiation, the ionization potential must be adjusted so that carriers generated in the charge generation layer are injected into the charge transport layer without accumulating space charges. In addition, a manufacturing requirement is to be able to select a solvent that will allow the charge generation layer to be stably formed into a film without being dissolved or attacked by the charge transport layer solvent.
本発明においては、上記のように、電荷発生層に構造式
（１）で示される単量体単位で構成されるポリカーボネ
ート樹脂を、又、電荷輸送層に構造式（Ｉ）で示される
単量体単位で構成されるポリカーボネート樹脂を用いて
いるから、表面層をなす電荷輸送層は機械的強度が大き
く、暗所での電荷保持性が高く、電荷発生層からの光生
成したキャリアの注入効率がよいため、高感度で繰返し
並足性の良好なものとなっている。In the present invention, as described above, a polycarbonate resin composed of monomer units represented by structural formula (1) is used in the charge generation layer, and a polycarbonate resin composed of monomer units represented by structural formula (I) is used in the charge transport layer. Since polycarbonate resin is used, which is composed of body units, the charge transport layer that forms the surface layer has high mechanical strength, high charge retention in the dark, and high injection efficiency of photogenerated carriers from the charge generation layer. Because of this, it has high sensitivity and good repeatability.
実施例 次に、本発明を実施例によって説明する。Example Next, the present invention will be explained by examples.
実施例１
下記構造式で示されるスクェアリウム顔料２重量部と、
ビスフェノールＡポリカーボネート樹脂（マクロロン５
７０５、分子量１００，０００． ＢＡＹＥＲ社製）と
を、ジクロロメタン１３０重量部及び１．１．２−トリ
クロロエタン１３０重量部の混合溶媒中に添加混合し、
ボールミルで粉砕して塗布液を製造した。この塗布液を
導電性透明支持体く膜厚１００即ポリエチレンテレフタ
レートフイルム表面上に酸化インジウム蒸着膜を設けた
もの、表面抵抗１０１３Ω）上に塗布し、乾燥して膜厚
１１ｍの電荷発生層を形成した。Example 1 2 parts by weight of Squarium pigment represented by the following structural formula and bisphenol A polycarbonate resin (Macrolon 5
705, molecular weight 100,000. manufactured by BAYER) into a mixed solvent of 130 parts by weight of dichloromethane and 130 parts by weight of 1.1.2-trichloroethane,
A coating solution was prepared by pulverizing the powder using a ball mill. This coating solution was applied onto a conductive transparent support (with a film thickness of 100 m, in which an indium oxide vapor-deposited film was provided on the surface of a polyethylene terephthalate film (surface resistance: 1013 Ω)), and dried to form a charge generation layer with a film thickness of 11 m. did.
次いで、下記構造式で示される化合物３重量部Ｈ３ＣＨ
３
前記例示構造式（１〉のポリカーボネート樹脂４重量部
とをトルエン ２８重量部に溶解して得られた塗布液を
、電荷発生層の上にアプリケータで塗布して膜厚２１切
の電荷輸送層を形成し、電子写真感光体を作成した。Next, 3 parts by weight of a compound represented by the following structural formula H3CH
3 A coating solution obtained by dissolving 4 parts by weight of the polycarbonate resin of the above exemplary structural formula (1) in 28 parts by weight of toluene was applied onto the charge generation layer with an applicator to form a charge transport film with a thickness of 21 mm. A layer was formed to produce an electrophotographic photoreceptor.
実施例２
バナジルフタロシアニン３重量部とビスフェノールＡポ
リカーボネート樹脂（マクロロン５７０５、分子量１０
０，０００． ＢＡＹＥＲ社製）２重量部とを、ジクロ
ロメタン１３０重量部及び１．１．２−トリクロロエタ
ン１３０重量部の混合溶媒中に添加混合し、ボールミル
で粉砕して塗布液を製造した。この塗布液を、実施例１
におけると同様の導電性透明支持体に塗布して膜厚１即
の電荷発生層を形成した。Example 2 3 parts by weight of vanadyl phthalocyanine and bisphenol A polycarbonate resin (Macrolon 5705, molecular weight 10)
0,000. (manufactured by BAYER) were added to a mixed solvent of 130 parts by weight of dichloromethane and 130 parts by weight of 1.1.2-trichloroethane, and ground in a ball mill to produce a coating liquid. This coating liquid was applied to Example 1.
A charge generating layer having a thickness of 1 was formed by coating the same conductive transparent support as in the above.
次いで、実施例１におけると同様にして電荷輸送層を形
成し電子写真感光体を作成した。Next, a charge transport layer was formed in the same manner as in Example 1 to produce an electrophotographic photoreceptor.
比較例１
実施例１において、電荷発生層の結着樹脂としてビスフ
ェノールＡポリカーボネート樹脂を用いる代わりに、ポ
リビニルブチラール樹脂（Ｂト１、漬水化学■製）を用
いた以外は、実施例１におけると同様にして電子写真感
光体を作成した。Comparative Example 1 The same procedure as in Example 1 was used, except that instead of using bisphenol A polycarbonate resin as the binder resin of the charge generation layer, polyvinyl butyral resin (B-to 1, manufactured by Ukisui Kagaku ■) was used. An electrophotographic photoreceptor was produced in the same manner.
比較例２
実施例２において、電荷発生層の結着樹脂として、ビス
フェノールＡポリカーボネート樹脂を用いる代わりに、
ポリビニルブチラール樹脂（８Ｍ−１、漬水化学＠製）
を用いた以外は、実施例２におけると同様にして電子写
真感光体を作成した。Comparative Example 2 Instead of using bisphenol A polycarbonate resin as the binder resin of the charge generation layer in Example 2,
Polyvinyl butyral resin (8M-1, manufactured by Tsukisui Kagaku@)
An electrophotographic photoreceptor was prepared in the same manner as in Example 2, except that .
比較例３
実施例１における電荷輸送層の結着樹脂の代わりに、電
荷発生層の結着樹脂と同一のものであるビスフェノール
Ａポリカーボネート樹脂くマクロロン５７０５、分子量
１００，０００ＳＢＡＹＥＲ社製）を用いた以外は、実
施例１にあけると同様にして電子写真感光体を作成した
。Comparative Example 3 Except that instead of the binder resin of the charge transport layer in Example 1, a bisphenol A polycarbonate resin Macrolon 5705 (molecular weight 100,000, manufactured by SBAYER), which is the same as the binder resin of the charge generation layer, was used. An electrophotographic photoreceptor was prepared in the same manner as in Example 1.
比較例４
実施例２における電荷発生層の結着樹脂の代わりに、電
荷輸送層の結着樹脂と同一のものである前記例示構造式
り１）のポリカーボネート樹脂ビスフェノールＡポリカ
ーボネート樹脂（マクロロン５７０５、分子量ｉｏｏ、
ｏｏｏ、ＢＡＹＥＲ社製）を用いた以外は、実施例２
におけると同様にして電子写真感光体を作成した。Comparative Example 4 Instead of the binder resin of the charge generation layer in Example 2, a polycarbonate resin with the above-mentioned structural formula 1) which is the same as the binder resin of the charge transport layer, bisphenol A polycarbonate resin (Macrolon 5705, molecular weight ioo,
Example 2 except that ooo, manufactured by BAYER Co., Ltd.) was used.
An electrophotographic photoreceptor was prepared in the same manner as in .
このようにして作製された電子写真感光体のシートを８
４順φのアルミニウムパイプ上に巻き付け、電子写真特
性評価装置によって、以下のように評価を行った。The sheet of electrophotographic photoreceptor produced in this way was
It was wound around an aluminum pipe with a diameter of 4, and was evaluated as follows using an electrophotographic property evaluation device.
まず、感光体流入電流が一１０μＡになるように帯電し
、帯電後１秒後の表面電位を測定し、ｖＰＯ−（ボルト
〉とした。その後、タングステンランプで除電を行い、
除電後の電位を測定し、これを残留電位ＶＲとした。こ
の操作を１００回繰返し、繰返し安定性（△■ＰＯ及び
ΔＶＲ）を調べた。First, the photoreceptor was charged so that the inflow current was 110 μA, and the surface potential was measured 1 second after charging, and was expressed as vPO- (volts).Then, the static electricity was removed using a tungsten lamp.
The potential after static elimination was measured, and this was defined as the residual potential VR. This operation was repeated 100 times, and the cyclic stability (Δ■PO and ΔVR) was examined.
続いてｖＰＯを一８００Ｖとなるように帯電電流を調整
し、帯電後０．３秒で８００ｎｍの単色光を、露光量Ｆ
（エルグ／ ｃｍ ）で露光を行い、露光後０１７秒で
の電位を測定し、ＶＰＯからの電位の減衰量を露光量で
割った値をｄＶ／ｄＥとし、光感度の指標とした（即ち
、単位光量当りの電位の初期減衰量である）。これらの
結果を第１表に示す。Next, the charging current was adjusted so that vPO was -800V, and 800 nm monochromatic light was applied at 0.3 seconds after charging at an exposure amount of F.
(erg/cm), the potential was measured 017 seconds after exposure, and the value obtained by dividing the amount of attenuation of the potential from VPO by the exposure amount was defined as dV/dE, which was used as an index of photosensitivity (i.e., (This is the initial attenuation of potential per unit amount of light). These results are shown in Table 1.
第１表
第１表の結果より、電荷輸送層の結着樹脂として例示構
造式（１）で示されるポリカーボネート樹脂を用いた電
子写真感光体においては、電荷発生層の結着樹脂として
ビスフェノールＡポリカーボネート樹脂を用いた方が、
他の結着樹脂を用いる場合に比して、光感度（ｄＶ／ｄ
Ｅ）及び繰返し安定性（ΔＶＰＯ，ΔＶＲ）が向上して
いることが分かる。Table 1 From the results shown in Table 1, in an electrophotographic photoreceptor using a polycarbonate resin represented by the exemplary structural formula (1) as a binder resin for a charge transport layer, bisphenol A polycarbonate is used as a binder resin for a charge generation layer. It is better to use resin,
Compared to the case of using other binder resins, the photosensitivity (dV/d
It can be seen that E) and repetition stability (ΔVPO, ΔVR) are improved.
又、電荷発生層及び電荷輸送層の結着樹脂として、共に
ビスフェノールＡポリカーボネート樹脂を用いた場合に
は、感度は高いが、暗減衰が大きく、電荷保持性が悪い
。同様に例示構造式（１）で示されるポリカーボネート
樹脂を電荷発生層及び電荷輸送層における結着樹脂とし
て用いた場合には、電荷保持特性はよいが、感度及び繰
返し安定性が悪い。Furthermore, when bisphenol A polycarbonate resin is used as the binder resin for both the charge generation layer and the charge transport layer, the sensitivity is high, but the dark decay is large and the charge retention is poor. Similarly, when a polycarbonate resin represented by the exemplary structural formula (1) is used as a binder resin in the charge generation layer and the charge transport layer, the charge retention property is good, but the sensitivity and repetition stability are poor.
更に、塗工上、電荷発生層及び電荷輸送層に同一のポリ
カーボネート樹脂を用いた場合には、電荷発生層が電荷
輸送層に溶は出すという問題があり、特に浸漬塗布法で
は正常な膜の形成が行われない。Furthermore, in coating, when the same polycarbonate resin is used for the charge generation layer and the charge transport layer, there is a problem that the charge generation layer dissolves into the charge transport layer.Especially in the dip coating method, the normal film is not formed. No formation occurs.
これに対して、本発明においては、上記のように電荷発
生層におけるポリカーボネート樹脂と、電荷輸送層にお
けるものとが互いに異なるため、両者が溶は合わないよ
うな溶剤を選択することができるので、浸漬塗布法によ
って成膜することができる。On the other hand, in the present invention, since the polycarbonate resin in the charge generation layer and the polycarbonate resin in the charge transport layer are different from each other as described above, it is possible to select a solvent that does not dissolve the two. The film can be formed by a dip coating method.
発明の効果
本発明においては、電荷輸送層にあける結着樹脂として
構造式（ＩＩ）で示される単量体単位で構成されるポリ
カーボネート樹脂を用いるから、電荷輸送層中に存在し
ていた電荷輸送材料が電荷輸送層表面に結晶析出化して
きたり、ソルベントクラックが発生するという現象が生
じることがない。Effects of the Invention In the present invention, since a polycarbonate resin composed of monomer units represented by structural formula (II) is used as the binder resin in the charge transport layer, the charge transport existing in the charge transport layer is There is no occurrence of phenomena such as crystal precipitation of the material on the surface of the charge transport layer or generation of solvent cracks.
更に、電荷発生Ｈにおける結着樹脂として構造式（Ｉ）
で示される単量体単位で構成されるポリカーボネート樹
脂を使用しているから、光感度及び繰返し安定性が良好
である。したがって、電子写真複写機に装着して連続使
用した場合でも、高感度で長時間、安定な画質のコピー
画像を得ることができる。Furthermore, as a binder resin in charge generation H, structural formula (I)
Since the polycarbonate resin composed of monomer units shown in the following is used, the photosensitivity and repetition stability are good. Therefore, even when the apparatus is attached to an electrophotographic copying machine and used continuously, copy images with high sensitivity and stable image quality can be obtained for a long time.
特許出願人 富士ゼロックス株式会社代理人
弁理士 製部 剛Patent applicant Fuji Xerox Co., Ltd. Agent
Patent attorney Tsuyoshi Seibe
Claims (1)
輸送層とを有する電子写真感光体において、電荷発生層
における結着樹脂が、下記構造式（ I ）で示される単
量体単位で構成されるポリカーボネート樹脂よりなり、
電荷輸送層における結着樹脂が、下記構造式（II）で示
される単量体単位で構成されるポリカーボネート樹脂よ
りなることを特徴とする電子写真感光体。 ▲数式、化学式、表等があります▼（ I ） ▲数式、化学式、表等があります▼（II） （式中、Ｘ及びＸ′は水素原子、ハロゲン原子又はメチ
ル基を表わし、Ｒは水素原子、ハロゲン原子、水酸基、
カルボキシル基、アセチル基又は炭素数１〜５のアルキ
ル基を表わす）(1) In an electrophotographic photoreceptor having at least a charge generation layer and a charge transport layer on a conductive support, the binder resin in the charge generation layer is a monomer unit represented by the following structural formula (I). Made of polycarbonate resin,
An electrophotographic photoreceptor characterized in that the binder resin in the charge transport layer is made of a polycarbonate resin composed of monomer units represented by the following structural formula (II). ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼(II) (In the formula, X and X' represent a hydrogen atom, a halogen atom, or a methyl group, and R is a hydrogen atom , halogen atom, hydroxyl group,
(represents a carboxyl group, acetyl group, or an alkyl group having 1 to 5 carbon atoms)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP72688A JPH01177551A (en) | 1988-01-07 | 1988-01-07 | Electrophotographic sensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP72688A JPH01177551A (en) | 1988-01-07 | 1988-01-07 | Electrophotographic sensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01177551A true JPH01177551A (en) | 1989-07-13 |
Family
ID=11481740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP72688A Pending JPH01177551A (en) | 1988-01-07 | 1988-01-07 | Electrophotographic sensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01177551A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0420207A2 (en) * | 1989-09-27 | 1991-04-03 | Mita Industrial Co. Ltd. | Electrophotosensitive material and method of manufacturing the same |
| US5578406A (en) * | 1994-08-23 | 1996-11-26 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor |
-
1988
- 1988-01-07 JP JP72688A patent/JPH01177551A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0420207A2 (en) * | 1989-09-27 | 1991-04-03 | Mita Industrial Co. Ltd. | Electrophotosensitive material and method of manufacturing the same |
| US5578406A (en) * | 1994-08-23 | 1996-11-26 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor |
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