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1. 发明专利

JPH0655908B2 失效
公开(公告)号：JPH0655908B2
公开(公告)日：1994-07-27
申请号：JP27022089
申请日：1989-10-19
申请人： CANON KK
发明人： YAMAZAKI ITARU , MYAZAKI HAJIME , TAKAI HIDEYUKI , INAI KAZUFUMI
IPC分类号： G03G5/06 , C09B67/50

2. 发明专利

JPH04320271A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH04320271A
公开(公告)日：1992-11-11
申请号：JP11371991
申请日：1991-04-19
申请人： CANON KK
发明人： INAI KAZUFUMI , TAKAI HIDEYUKI , YAMAZAKI ITARU , KANAMARU TETSUO , MIYAZAKI HAJIME
IPC分类号： C09B47/04 , G03G5/06 , H04N1/29
摘要： PURPOSE:To stabilize sensitivity in repeated electrophotographic processes and to enable the retention of a high-grade image by forming a photosensitive layer contg. a phthalocyanine compd. subjected to filtration as a sulfuric acid soln. on an electric conductive substrate. CONSTITUTION:A phthalocyanine compd. is dissolved once in sulfuric acid and the resulting soln. is filtered to remove impurities adsorbed on the phthalocyanine compd. and insoluble in the sulfuric acid. Concd. sulfuric acid having >=60wt.% concn. is preferably used as the sulfuric acid so as to dissolve the phthalocyanine compd. in a short time. A cylindrical or filmlike electric conductive substrate made of a metal such as Al or plastic with an electric conductive layer may be used as the electric conductive substrate of this sensitive body. This sensitive body is a laminate type one having an electric charge generating layer and an electric charge transferring layer or a single layer type one contg. an electric charge generating material and an electric charge transferring material in a mixed state. The purity of the phthalocyanine compd. is enhanced and much stabilized electrophotographic characteristics such as high sensitivity and low residual potential are obtd.

3. 发明专利

JPH04153273A OXYTITANIUM PHTHALOCYANINE OF NOVEL CRYSTALLINE FORM AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR CONTAINING THE SAME 失效
公开(公告)号：JPH04153273A
公开(公告)日：1992-05-26
申请号：JP27782290
申请日：1990-10-18
申请人： CANON KK
发明人： YAMAZAKI ITARU , TAKAI HIDEYUKI , MIYAZAKI HAJIME , INAI KAZUFUMI , GO SHINTETSU , KANAMARU TETSUO
IPC分类号： G03G5/06 , C09B47/04 , C09B67/50 , H04N1/29
摘要： PURPOSE:To obtain an electrophotographic photoreceptor which exhibits higher sensitivity in the longer wavelength region by using oxytitanium phthalocyanine having such a crystalline form as will have strong peaks, in X-ray diffraction with Cu-Kalpha radiation, at specific Bragg angles (2theta+ or -0.2 deg.). CONSTITUTION:Titanium tetrachloride and orthophthalodinitrile are allowed to react in alpha-chloronaphthalene to obtain dichlorotitanium phthalocyanine. The resulting compound is washed wit a solvent such as alpha-chloronaphthalene, then with a solvent such as methanol, followed by hydrolysis with hot water, whereby oxytitanium crystals are obtained. The crystals are treated by the acid pasting method to be transformed into an amorphous form, and then treated with terpinolene, whereby oxytitanium phthalocyanine having such a crystalline form as will have strong peaks, in X-ray diffraction with Cu-Kalpha radiation, at Bragg angles (2theta+ or -0.2 deg.) of 8.5 deg., 13.6 deg., 17.1 deg., 18.0 deg., 23.9 deg. and 27.4 deg. is obtained.

4. 发明专利

JPH0384068A NOVEL CRYSTALLINE OXYTITANIUM PHTHALOCYANINE AND ELECTROPHOTOGRAPHICALLY SENSITIVE MATERIAL USING THE SAME 失效
公开(公告)号：JPH0384068A
公开(公告)日：1991-04-09
申请号：JP21977289
申请日：1989-08-25
申请人： CANON KK
发明人： YAMAZAKI ITARU , INAI KAZUFUMI , TAKAI HIDEYUKI , MIYAZAKI HAJIME
IPC分类号： G03G5/06 , C09B67/50
摘要： NEW MATERIAL:Crystalline oxytitanium phthalocyanine having strong peaks at Bragg's angles 2theta+ or -0.2 deg. of 4.8 deg., 9.6 deg. and 26.2 deg. in X-ray diffraction of Cu-Kalpha line. USE:Electric charge-generating material in electrophotographically sensitive material. Said material has exceedingly high photosensitivity to long wavelength light lays without variation of electric potential in continuous using, having excellent electric potential stability and excellent optical memorizing property to white light. PREPARATION:For instance, titanium tetrachloride is reacted with orthophthalodinitrile in alpha-chloronaphthalene to obtain dichlorotitanium phthalocyanine and resultant compound is washed in a solvent such as trichlorobenzene and a solvent such as methanol, in turn, then hydrolyzed in hot water.

5. 发明专利

JPH0345959A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH0345959A
公开(公告)日：1991-02-27
申请号：JP18023089
申请日：1989-07-14
申请人： CANON KK
发明人： GO NOBUAKI , INAI KAZUFUMI , MIYAZAKI HAJIME , MIYAJI TOSHIE
IPC分类号： G03G5/06 , C09B23/00
摘要： PURPOSE:To obtain stable potential characteristics even at the time of repeated uses by incorporating a specified compound in a photosensitive layer. CONSTITUTION:The photosensitive layer contains the compound represented by formula I in which R is an optionally substituted aromatic or heterocyclic group; X is an O or S atom or dicyano-methylene group; (m) is 1, 2, or 3; and (n) 0 or 1. Since this photoconductive compound has a large electron receptive space, it exhibits intermolecular mutual electric charge transfer action between an electron donative part and an electron receptive part in a crystalline state, thus permitting the obtained electrophotographic sensitive body to be high in sensitivity and superior in potential stability even at the time of repeated uses.

6. 发明专利

JPH02271361A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH02271361A
公开(公告)日：1990-11-06
申请号：JP9080689
申请日：1989-04-12
申请人： CANON KK
发明人： MIYAJI TOSHIE , MIYAZAKI HAJIME , GO NOBUAKI , INAI KAZUFUMI , TAKAI HIDEYUKI
IPC分类号： G03G5/06 , C09B23/00 , C09B23/14 , C09B23/16
摘要： PURPOSE:To enhance sensitivity and potential stability of the photosensitive body at the time of repeated uses and the reduce cost by forming a layer containing a specified electric charge transfer compound. CONSTITUTION:The photosensitive body contains in the layer the charge transfer compound represented by formula I in which X is O, S, or the like; Y is H, alkyl, or the like; each of R1 and R2 is an aryl or heterocyclic group; and n is 0, 1, or 2. A photosensitive layer can be formed by laminating a charge generating layer containing a charge generating material of formula I, such as formula II, and the charge transfer layer containing the charge transfer material such as a hydrazone compound of formula III, and the photosensitive layer can be formed into a single layer structure.

7. 发明专利

JPH02156251A ELECTROPHOTOGRAHIC SENSITIVE BODY 失效
公开(公告)号：JPH02156251A
公开(公告)日：1990-06-15
申请号：JP30986388
申请日：1988-12-09
申请人： CANON KK
发明人： MIYAJI TOSHIE , GO SHINTETSU , TAKAI HIDEYUKI , MIYAZAKI HAJIME , INAI KAZUFUMI
IPC分类号： C09B47/04 , G03G5/06
摘要： PURPOSE:To enhance sensitivity and potential stability at the time of repeated uses by incorporating a specified 1,8-naphthalocyanine derivatige in a photosensitive layer. CONSTITUTION:The photosensitive layer formed on a conductive substrate contains one of the 1,8-naphthalocyanine derivatives represented by formula I in which R is H, nitro, alkyl, such as methyl or ethyl, aralkyl, such as benzyl, halogen, such as F, Cl, or Br, and n is an integer of 1-6, thus permitting potential stability at the time of repeated uses and sensitivity to be enhanced.

8. 发明专利

JPH02111958A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH02111958A
公开(公告)日：1990-04-24
申请号：JP26406588
申请日：1988-10-21
申请人： CANON KK
发明人： GO SHINTETSU , TAKAI HIDEYUKI , INAI KAZUFUMI
IPC分类号： G03G5/06
摘要： PURPOSE:To obtain an electrophotographic sensitive body having high sensitivity and small residual potential and potential stability characteristics at the time of repeated uses by adding a specified disazo pigment in a photosensitive layer. CONSTITUTION:The electrophotographic sensitive body has on a conductive substrate the photosensitive layer containing the disazo pigment represented by formula I in which A is a coupler residue having a phenolic OH group and X is an optionally substituted naphthylene. Since a film containing this pigment has photoconductivity, the electrophotographic sensitive body is constituted by disspersing it into a proper binder to form a photoconductive film and using it, thus permitting the obtained electrophotographic sensitive body to be high in sensitivity and superior in potential stability, especially, at the time of long repeated use.

9. 发明专利

JPH0239161A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH0239161A
公开(公告)日：1990-02-08
申请号：JP18981988
申请日：1988-07-29
申请人： CANON KK
发明人： SENOO AKIHIRO , INAI KAZUFUMI
IPC分类号： C07D487/22 , C09B47/00 , G03G5/06
摘要： PURPOSE:To improve potential stability at the time of repeated use and sensitivity by incorporating at least one kind of compd. selected among specified tetrazaporphyrin derivs. and specified derivs. of metallic complex salts of tetrazaporphyrin into a photosensitive layer. CONSTITUTION:At least one kind of compd. selected among tetrazaporphyrin derivs. represented by formula I and derivs. of metallic complex salts of tetrazaporphyrin represented by formula II is incorporated into a photosensitive layer. In the formula I, X is H, a heavy hydrogen atom or an alkali metal atom and A is p or q (a shown residue in a caption of formula I) which may have a substituent. In the formula II, M is an atom of a metal other than Si and alkali metals, Y is halogen, hydroxyl, alkoxy or O and n is 0, 1 or 2. A film contg. a pigment represented by the formula I or II has photoconductivity and an electrophotographic sensitive body can be produced by forming a film of the pigment by vacuum deposition or by forming a film contg. the pigment dispersed in a proper binder. The sensitive body has high sensitivity and superior ootantial stability at the time of repeated use.

10. 发明专利

JPH0239054A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH0239054A
公开(公告)日：1990-02-08
申请号：JP18971588
申请日：1988-07-28
申请人： CANON KK
发明人： YAMAZAKI ITARU , INAI KAZUFUMI
IPC分类号： C07D487/22 , C09B47/00 , G03G5/06
摘要： PURPOSE:To improve sensitivity and potential stability of an electrophotographic sensitive body by incorporating a specified tetraaza porphyrin deriv. and a specified tetraaza porphyrin metal complex salt deriv. into an electrophotographic sensitive body. CONSTITUTION:The title electrophotographic sensitive body contains at least one kind selected from a group consisting of a tetraaza porphyrin derivs. expressed by the formula I and tetraaza porphyrin metal complex salt derivs. expressed by the formula II. In the formulas I and II, X is an H atom, heavy hydrogen atom, or an alkali metal atom; A is a residue expressed by the formula III, which may have a substituent; M is an Si atom or a metal atom other than alkali metal atoms; Y is a halogen atom, OH group, alkoxy group, or an O atom; n is an integer zero, 1, or 2. Thus, an electrophotographic sensitive body having high sensitivity and low residual potential is obtd. In this case, an example for synthesized pigment as expressed by the formula IV may be used.

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