公开(公告)号：US5147752A

公开(公告)日：1992-09-15

申请号：US607328

申请日：1990-10-30

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/05

CPC分类号： G03G5/0589 ,  G03G5/0546 ,  G03G5/0592

摘要： A process for producing an electrophotographic light-sensitive material comprising a support having provided thereon a photoconductive layer containing an inorganic photoconductive substance and a binder resin is disclosed. The method comprises mixing the inorganic photoconductive substance and the binder resin to prepare a dispersion for forming the photoconductive layer, and coating the dispersion on the support, wherein the binder resin contains at least one resin (A) which has a weight average molecular weight of from 1.times.10.sup.3 to 1.times.10.sup.4 contains a repeating unit represented by the formula (I) specified above as a polymer component, has a crosslinked structure prior to the preparation of the dispersion for forming the photoconductive layer, and has at least one acidic group bonded at only one terminal of at least one polymer main chain. The electrophotographic light-sensitive material obtained according to the present invention is excellent in electrostatic characteristics and anti-humidity.

摘要翻译： 公开了一种用于制造电子照相感光材料的方法，其包括其上设置有包含无机光电导物质和粘合剂树脂的光电导层的载体。 该方法包括混合无机光电导物质和粘合剂树脂以制备用于形成光电导层的分散体，并将该分散体涂布在载体上，其中粘合剂树脂含有至少一种重均分子量为 1×10 3〜1×10 4含有作为聚合物成分的上述式（I）所示的重复单元，在制备形成光电导层的分散液之前具有交联结构，并且具有至少一个仅在一个上结合的酸性基团 至少一个聚合物主链的末端。 根据本发明获得的电子照相感光材料具有优异的静电特性和抗湿性。

公开(公告)号：US5134051A

公开(公告)日：1992-07-28

申请号：US400853

申请日：1989-08-30

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/05

CPC分类号： G03G5/0589 ,  G03G5/0546

摘要： An electrophotographic photoreceptor comprising a support having provided thereon at least one photoconductive layer containing at least inorganic photoconductive particles and a binder resin is disclosed, wherein said binder resin comprises (A) at least one resin having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and comprising not less than 30% by weight of at least one repeating unit (a-i) represented by formula (I) or (II): ##STR1## wherein X.sub.1 and X.sub.2 each represents a hydrogen atom, a hydrocarbon group having from 1 to 10 carbon atoms, a chlorine atom, a bromine atom, --COY.sub.1 or --COOY.sub.2, wherein Y.sub.1 and Y.sub.2 each represents a hydrocarbon group having from 1 to 10 carbon atoms, provided that both X.sub.1 and X.sub.2 do not simultaneously represent a hydrogen atom; and W.sub.1 and W.sub.2 each represents a mere bond or a linking group containing from 1 to 4 linking atoms which connects --COO-- and the benzene ring, and from 0.5 to 15% by weight of at least one repeating unit (a-ii) containing at least one acidic group selected from --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, ##STR2## wherein R represents a hydrocarbon group or --OR' (R' represents a hydrocarbon group having from 1 to 22 carbon atoms), and a cyclic acid anhydride-containing group.

公开(公告)号：US5112712A

公开(公告)日：1992-05-12

申请号：US600047

申请日：1990-10-19

申请人： Seishi Kasai ,  Kazuo Ishii ,  Eiichi Kato

发明人： Seishi Kasai ,  Kazuo Ishii ,  Eiichi Kato

IPC分类号： G03G5/08 ,  C07D207/46 ,  C07D209/48 ,  C07D209/56 ,  C07D209/62 ,  C07D209/66 ,  C07D209/76 ,  C07D209/94 ,  C07D211/94 ,  C07D217/24 ,  C07D221/14 ,  C07D221/18 ,  C07D221/20 ,  C07D223/10 ,  C07D223/16 ,  C07D233/72 ,  C07D263/44 ,  C07D265/32 ,  C07D471/06 ,  C07D487/04 ,  C07D491/044 ,  C07D491/18 ,  G03G5/06 ,  G03G5/09

CPC分类号： C07D209/48 ,  C07D207/46 ,  C07D209/66 ,  C07D209/76 ,  G03G5/0607 ,  G03G5/0629 ,  G03G5/0631 ,  G03G5/0633 ,  G03G5/0637 ,  G03G5/0638 ,  G03G5/0642 ,  G03G5/0648 ,  G03G5/065 ,  G03G5/0651 ,  G03G5/0653 ,  G03G5/09

摘要： This invention provides an electrophotographic photosensitive material comprising a conductive support having thereon a photoconductive layer containing at least an inorganic photoconductor and a binder resin, wherein the photoconductive layer contains an N-hydroxyimide compound represented by the following general formula (I): ##STR1## wherein Z represents an organic residue capable of forming a cyclic compound having a saturated or unsaturated bond, thereby increasing its photosensitivity and improving its chargeability, dark charge retentivity and photosensitivity over a wide range from visible to infrared regions. Upon actual reproduction, the inventive material provides a fog-free and clear image even under severe conditions such as high temperature and high humidity conditions (e.g., 30.degree. C. and 80% RH).

公开(公告)号：US5055369A

公开(公告)日：1991-10-08

申请号：US325795

申请日：1989-03-20

申请人： Eiichi Kato ,  Hiroshi Ishibashi ,  Kazuo Ishii

发明人： Eiichi Kato ,  Hiroshi Ishibashi ,  Kazuo Ishii

IPC分类号： G03G9/12 ,  G03G9/13

CPC分类号： G03G9/133 ,  G03G9/131

摘要： A liquid developer for electrostatic photography is disclosed. The liquid developer comprises a resin dispersed as grains in a non-aqueous solvent having an electrical resistance of 10.sup.9 .OMEGA.cm or more and a dielectric constant of 3.5 or less, which is characterized in that the dispersed resin grains are copolymer resin grains obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the non-aqueous solvent but becomes insoluble therein after polymerization and at least one monofunctional macromonomer (B) which is composed of a polymer moiety having a repeating unit of the following formula (I) and a copolymerizable double bond-containing group of the following formula (II) bonded to only one terminal of the main chain of the polymer moiety and which has a number average molecular weight of 1.times.10.sup.4 or less, in the presence of a resin which is soluble in the non-aqueous solvent and which contains no graft group capable of polymerizing with the monomers; ##STR1## In formula (I), X represents --COO--, --OCO--, --CH.sub.2 OCO--, --CH.sub.2 COO--, --O--, --SO.sub.2 --, ##STR2## R.sub.1 represents a hydrogen atom or a hydrocarbon group having from 1 to 18 carbon atoms;Y represents a hydrocarbon group having from 1 to 22 carbon atoms;a.sub.1 and a.sub.2 each represents a hydrocarbon atom, a halogen atom, a cyano group, a hydrocarbon group having from 1 to 8 carbon atoms, a group --COO--Z or a group --COO--Z as interrupted by a hydrocarbon group having from 1 to 8 carbon atoms; andZ represents a hydrocarbon group having from 1 to 18 carbon atoms;In formula (II), V has the same meaning as X in formula (I); andb.sub.1 and b.sub.2 each is selected from the same groups as a.sub.1 or a.sub.2 in formula (I).The liquid developer has excellent re-dispersibility, storability, image reproducibility, and fixability.

公开(公告)号：US5053301A

公开(公告)日：1991-10-01

申请号：US322965

申请日：1989-03-14

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/05

CPC分类号： G03G5/0596

摘要： A lithographic printing plate precursor excellent in oil-desensitivity, whereby an original is faithfully reproduced without occurrence of overall or spotted stains as an offset master is provided, which comprises an electrically conductive support and at least one photoconductive layer, provided thereon, containing photoconductive zinc oxide and a binder resin, in which said photoconductive layer contains hydrophilic resin grains having an average grain diameter of same as or smaller than the maximum grain diameter of said photoconductive zinc oxide grains.

公开(公告)号：US5001029A

公开(公告)日：1991-03-19

申请号：US299496

申请日：1989-01-23

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： B41N1/14 ,  G03G5/05 ,  G03G5/08 ,  G03G13/28

CPC分类号： G03G5/0546 ,  G03G5/055 ,  G03G5/0589 ,  G03G5/0592

摘要： An electrophotographic lithographic printing plate precursor which utilizes an electrophotographic photoreceptor comprising a conductive support having provided thereon at least one photoconductive layer containing photoconductive zinc oxide and a resin binder, wherein said resin binder comprises at least one resin which contains at least one functional group capable of producing at least one hydroxyl group through decomposition and is crosslinked in part to bring about improvements in background-stain resistance and printing durability.In accordance with this invention, electrophotographic lithographic printing plate precursors excellent in background stain resistance and printing durability are obtained.

公开(公告)号：US4871638A

公开(公告)日：1989-10-03

申请号：US165949

申请日：1988-03-09

申请人： Eiichi Kato ,  Kazuo Ishii ,  Ryosuke Itakura

发明人： Eiichi Kato ,  Kazuo Ishii ,  Ryosuke Itakura

IPC分类号： G03G5/05

CPC分类号： G03G5/0589

摘要： An electrophotographic photosensitive material comprising a support having provided thereon a photoconductive layer containing at least an inorganic photoconductive material and a binder, wherein said binder comprises at least resin (A) having a weight average molecular weight of from 1.times.10.sup.3 to 1.times.10.sup.4 and containing from 0.05 to 20% by weight a copolymer component having at least one acid group selected from --PO.sub.3 H, --COOH, --SO.sub.3 H, --OH, --SH, and ##STR1## wherein R respresents a hydrocarbon group; and resin (B) having a weight average molecular weight of at least 3.times.10.sup.4, said resin (B) not containing the aforesaid acid group nor a basic group.

公开(公告)号：US06197847B1

公开(公告)日：2001-03-06

申请号：US09009131

申请日：1998-01-20

申请人： Eiichi Kato ,  Sadao Osawa ,  Kazuo Ishii

发明人： Eiichi Kato ,  Sadao Osawa ,  Kazuo Ishii

IPC分类号： G09D1102

CPC分类号： G03G13/286 ,  G03G13/28 ,  G03G13/283

摘要： An oil-based ink for a printing plate by an ink jet process comprising spraying an oil-based ink comprising at least resin particles dispersed in a non aqueous carrier liquid having an electric resistance of 109 &OHgr;cm or more and a dielectric constant of 3.5 or less on a water-resistant support having a lithographically printable hydrophilic surface dropwise from a nozzle to form an image, wherein said resin particles dispersed are copolymer resin particles obtained by polymerization granulation of a solution comprising (i) and (ii): (i) at least one monofunctional monomer (A) which is soluble in a nonaqueous solvent which is at least miscible with the nonaqueous carrier liquid and becomes insoluble in the nonaqueous solvent by polymerization; (ii) at least one resin for dispersion stabilization (P) which is soluble in the nonaqueous solvent and is a polymer comprising a repeating unit, wherein a part of the polymer is crosslinked and a polymerizable double bond group which is copolymerizable with the monomer (A) is combined with only one end of at least one main chain of the polymer, and a method for preparing a printing plate by an ink jet process using the ink.

摘要翻译： 一种喷墨法用于印版的油性油墨，其特征在于，喷涂至少含有分散在电阻为10 9Ω·cm以上，介电常数为3.5以下的非水性载体液中的树脂颗粒的油性油墨 在具有可喷墨亲水性表面的防水支撑体上从喷嘴滴落形成图像，其中所述分散的树脂颗粒是通过将包含（i）和（ii）的溶液聚合制粒得到的共聚物树脂颗粒：（i） 至少一种可溶于非水溶剂的单官能单体（A），该非水溶剂与非水载体液体至少可混溶，并通过聚合变得不溶于非水溶剂; （ii）至少一种用于分散稳定化的树脂（P），其可溶于非水溶剂，并且是包含重复单元的聚合物，其中一部分交联，和可与单体共聚的可聚合双键基团 A）仅与聚合物的至少一个主链的一端结合，以及通过使用该油墨的喷墨方法制备印刷版的方法。

公开(公告)号：US6143806A

公开(公告)日：2000-11-07

申请号：US8544

申请日：1998-01-16

申请人： Eiichi Kato ,  Sadao Osawa ,  Kazuo Ishii

发明人： Eiichi Kato ,  Sadao Osawa ,  Kazuo Ishii

IPC分类号： C09D11/00 ,  C09D11/10 ,  C09D11/02 ,  C03G13/28

CPC分类号： C09D11/106 ,  C09D11/36

摘要： An oil-based ink for a printing plate by an ink jet process comprising spraying an oil-based ink comprising at least resin particles dispersed in a nonaqueous carrier liquid having an electric resistance of 10.sup.9 .OMEGA.cm or more and a dielectric constant of 3.5 or less on a water-resistant support having a lithographically printable hydrophilic surface to dropwise from a nozzle form an image, wherein the resin particles dispersed are polymer particles obtained by polymerization granulation of a solution comprising (i), (ii) and (iii): (i) at least one monofunctional monomer (A) which is soluble in a nonaqueous solvent at least miscible with the nonaqueous carrier liquid and becomes insoluble therein by polymerization; (ii) (ii-a) at least one monomer (B) represented having a specific substituent copolymerizable with the monomer (A), or (ii-b) at least one specific monofunctional macromonomer (MA) having a weight average molecular weight of 2.times.10.sup.4 or less; and (iii) at least one dispersion-stabilizing resin soluble in the nonaqueous solvent and having no graft group polymerizing with a monomer, and a method for preparing a printing plate by an ink jet process using the ink.

摘要翻译： 一种喷墨方法的印刷用油性油墨，其特征在于，喷涂含有至少分散在电阻为10 9Ω·cm以上，介电常数为3.5以下的非水载体液中的树脂颗粒的油性油墨 在具有由喷嘴形成的可平版印刷的亲水性表面的耐水支撑体上形成图像，其中分散的树脂颗粒是通过聚合造粒包含（i），（ii）和（iii）的溶液获得的聚合物颗粒：（ i）至少一种单官能单体（A），其可溶于至少与非水性载体液体混溶并且通过聚合而不溶于其中的非水溶剂; （ii）（ii-a）表示具有可与单体（A）共聚的特定取代基的至少一种单体（B），或（ii-b）至少一种具有重均分子量的特定单官能大分子单体 2x104以下; 和（iii）至少一种可溶于非水溶剂且不与单体聚合的接枝基团的分散体稳定树脂，以及使用该油墨通过喷墨方法制备印版的方法。

公开(公告)号：US5677098A

公开(公告)日：1997-10-14

申请号：US578949

申请日：1995-12-27

申请人： Takao Nakayama ,  Eiichi Kato ,  Kazuo Ishii

发明人： Takao Nakayama ,  Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/06 ,  G03G5/09 ,  G03G5/10

CPC分类号： G03G5/0674 ,  G03G5/067 ,  G03G5/09 ,  Y10S430/146

摘要： A method for forming an image using beam exposure of an electrophotosensitive material comprising an electrically conductive support having thereon an electrophotosensitive layer containing an inorganic photoconductor, a chemical sensitizer, a spectral sensitizing dye and a binder resin, wherein the spectral sensitizing dye is at least one dye selected from the compounds represented by formulae (I) and (II) defined in the disclosure and the surface of the electrically conductive support on the side of the electrophotosensitive layer has a BEKK smoothness of 300 sec/10 cc or more.

摘要翻译： 一种使用光电敏感材料的光束曝光来形成图像的方法，该光电敏感材料包括其上具有含有无机光电导体，化学增感剂，光谱增感染料和粘合剂树脂的光敏层的导电载体，其中光谱增感染料是至少一种 选自本公开中限定的由式（I）和（II）表示的化合物的染料和在电光敏层一侧的导电载体的表面的BEKK平滑度为300秒/ 10cc以上。