公开(公告)号：US5176975A

公开(公告)日：1993-01-05

申请号：US727166

申请日：1991-07-09

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： C08F283/00 ,  C08F290/00 ,  C08F290/04 ,  C08F299/00 ,  G03G5/05 ,  G03G5/08 ,  G03G5/087 ,  G03G13/28

CPC分类号： G03G5/0592 ,  C08F290/04 ,  G03G13/28 ,  G03G5/0589

摘要： An electrophotographic lithographic printing plate precursor which utilizes an electrophotographic light-sensitive material comprising a conductive support having provided thereon at least one photoconductive layer containing photoconductive zinc oxide and a binder resin, wherein the binder resin contains at least one graft-type copolymer comprising, as a polymerizable component, at least one monofunctional macromonomer which has a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4, comprises at least one polymerizable component containing a functional group which has at least one atom selected from a fluorine atom and a silicon atom and is capable of forming at least one hydrophilic group selected from a sulfo group, a phosphono group, a carboxy group and a hydroxy group through decomposition, and has a polymerizable double bond group.

摘要翻译： 一种电子照相平版印刷版原版，其利用电子照相感光材料，该电子照相感光材料包括导电性载体，其上设置有至少一层含有光电导氧化锌和粘合剂树脂的光电导层，其中所述粘合剂树脂含有至少一种接枝型共聚物， 可聚合组分，至少一种重均分子量为1×10 3至2×10 4的单官能大分子单体包含至少一种含有至少一个选自氟原子和硅原子的原子的官能团的可聚合组分，并且具有能够 通过分解形成至少一种选自磺基，膦酰基，羧基和羟基的亲水基团，并且具有可聚合双键基团。

公开(公告)号：US5135830A

公开(公告)日：1992-08-04

申请号：US647073

申请日：1991-01-29

申请人： Eiichi Kato

发明人： Eiichi Kato

IPC分类号： G03G5/05 ,  G03G5/087 ,  G03G13/28

CPC分类号： G03G5/0592 ,  G03G5/0589

摘要： An electrophotographic light-sensitive material comprising a support having provided thereon at least one photoconductive layer containing an inorganic photoconductive substance and a binder resin, wherein the binder resin comprises (A) at least one resin (resin (A)) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and containing not less than 30% by weight of a polymer component corresponding to a repeating unit represented by the general formula (I) described below, and having at least one specified acidic group bonded to one of the terminals of the main chain thereof: ##STR1## wherein a.sub.1, a.sub.2 and R.sub.1 are as defined in the specification; and (B) at least one graft type copolymer (resin (B)) having a weight average molecular weight of from 3.times.10.sup.4 to 1.times.10.sup.6 and formed from, as a copolymerizable component, at least one mono-functional macromonomer (M) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and comprising an AB block copolymer being composed of an A block comprising at least one polymer component containing at least one specified acidic group, and a B block containing at least one polymer component represented by the general formula (II) described below and having a polymerizable double bond group bonded to the terminal of the main chain of the B block polymer: ##STR2## wherein b.sub.1, b.sub.2, X.sub.1 and R.sub.21 are as defined in the specification.The electrophotographic light-sensitive material exhibits excellent electrostatic characteristics and mechanical strength even under severe conditions. Also, it is advantageously employed in the scanning exposure system using a semiconductor laser beam.

公开(公告)号：US5116710A

公开(公告)日：1992-05-26

申请号：US582320

申请日：1990-09-14

申请人： Eiichi Kato

发明人： Eiichi Kato

IPC分类号： C08F290/00 ,  C08F299/00 ,  C08L101/00 ,  G03G5/05

CPC分类号： G03G5/0589 ,  G03G5/0592

摘要： An electrophotographic light-sensitive material comprising a support having provided thereon at least one photoconductive layer containing an inorganic photoconductive substance and a binder resin, wherein the binder resin comprises at least one graft copolymer resin (A) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 formed from a monofunctional macromonomer (MA) and a monomer represented by the general formula (III) described below,and having a component containing at least one specified acidic group bonded to only one of the terminals of the main chain thereof, the monofunctional macromonomer (M) having a weight average molecular weight of not more than 2.times.10.sup.4, containing at least one polymer component corresponding to a repeating unit represented by the general formula (IIa) or (IIb) described below, and having a polymerizable double bond-containing group represented by the general formula (I) described below bonded to only one of the terminals of the main chain of the macromonomer: ##STR1## wherein A.sub.0, a.sub.1 and a.sub.2 are as defined in the specification: ##STR2## wherein A.sub.1, B.sub.1, b.sub.1, b.sub.2 and B.sub.0 are as defined in the specification: ##STR3## wherein A.sub.2, B.sub.2, c.sub.1 and c.sub.2 are as defined in the specification; and at least one copolymer resin (B) having a weight average molecular weight of from 5.times.10.sup.4 to 1.times.10.sup.6 and formed from at least a monofunctional macromonomer (MB) having a weight average molecular weight of not more than 2.times.10.sup.4 and a monomer represented by the general formula (III) described above, the macromonomer (MB) comprising at least one polymer component corresponding to a repeating unit represented by the general formula (IIa) or (IIb) described above, and at least one polymer component containing at least one specified acidic group, and the macromonomer (MB) having a polymerizable double bond-containing group represented by the general formula (I) described above bonded to only one terminal of the main chain thereof, the content of the component containing the acidic group bonded to the terminal of the polymer main chain being from 1 to 20% by weight based on the weight of resin (A).

公开(公告)号：US5112716A

公开(公告)日：1992-05-12

申请号：US507535

申请日：1990-04-11

申请人： Eiichi Kato ,  Hideyuki Hattori

发明人： Eiichi Kato ,  Hideyuki Hattori

IPC分类号： G03G9/13

CPC分类号： G03G9/131 ,  Y10S430/105

摘要： A liquid developer for electrostatic photography is disclosed. The liquid developer comprises at least resin grains dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA.cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin grains are polymer resin grains obtained by polymerizing a solution containing (1) at least a mono-functional monomer (A) which is soluble in the aforesaid non-aqueous solvent but becomes insoluble therein by being polymerized in the presence of a dispersion-stabilizing resin (BA) soluble in the non-aqueous solvent, which is a polymer containing a recurring unit represented by the formula (I) described in the specification, at least a part of the main chain of the polymer being crosslinked, and, optionally, (2) a monomer (B-1) represented by the formula (II-1) described in the specification. The liquid developer of this invention is excellent in re-dispersibility, storability, stability, image-reproducibility, and fixability.

公开(公告)号：US5106716A

公开(公告)日：1992-04-21

申请号：US537723

申请日：1990-06-14

申请人： Eiichi Kato ,  Hideyuki Hattori

发明人： Eiichi Kato ,  Hideyuki Hattori

IPC分类号： G03G9/13

CPC分类号： G03G9/131 ,  G03G9/133 ,  Y10S430/105

摘要： A liquid developer for electrostatic photography is disclosed. The liquid developer of this invention comprises resin grains dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA.cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin grains are copolymer resin grains obtained by polymerizing a solution containing at least one mono-functional monomer (A) which is soluble in the above non-aqueous solvent but becomes insoluble in the non-aqueous solvent by being polymerized, in the presence a dispersion-stabilizing resin, which is soluble in the non-aqueous solvent and is composed of at least one recurring unit represented by the formulae (Ia) and (Ib) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 as defined in the specification.The liquid developer according to the present invention is excellent in redispersibility, storability, stability, image-reproducibility and fixability.

摘要翻译： 公开了一种用于静电摄影的液体显影剂。 本发明的液体显影剂包含分散在电阻至少为10欧姆·厘米且介电常数不高于3.5的非水溶剂中的树脂颗粒，其中分散的树脂颗粒是通过聚合溶液获得的共聚树脂颗粒 含有至少一种可溶于上述非水溶剂的单官能单体（A），但在可溶于非水溶剂的分散稳定树脂存在下，通过聚合而变得不溶于非水溶剂， 并且由如本说明书中定义的至少一种由式（Ia）和（Ib）表示的重复单元由重均分子量为1×10 3至2×10 4组成。 根据本发明的液体显影剂在再分散性，保存性，稳定性，图像再现性和定影性方面都是优异的。

公开(公告)号：US5084367A

公开(公告)日：1992-01-28

申请号：US384540

申请日：1989-07-25

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 ,  G03G5/0535 ,  G03G5/0546 ,  G03G5/0592

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 containing at least one polar group selected from --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, ##STR1## wherein R represents a hydrocarbon group or --OR'; and R' represents a hydrocarbon group, and a cyclic acid anhydride-containing group, and (B) at least one resin having a weight average molecular weight of 5.times.10.sup.4 or more and containing a crosslinked structure. The photoreceptor exhibits excellent electrostatic characteristics, image forming performance as well as printing suitability irrespective of change in environmental condition or the kind of sensitizing dyes to be used in combination with the photoreceptor.

公开(公告)号：US5073467A

公开(公告)日：1991-12-17

申请号：US420505

申请日：1989-10-11

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 ,  G03G5/0592

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, wherein the 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 with at least one substituent selected from the group consisting of (i) --PO.sub.3 H.sub.2, (ii) --SO.sub.3 H, (iii) --COOH, (iv) ##STR1## and (B) at least one copolymer resin comprising a monofunctional macromonomer and a monomer, said monofunctional macromonomer having a weight average molecular weight of not more than 2.times.10.sup.4, said macromonomer containing at least one polymerization component represented by formula (b-2) or (b-3): ##STR2## with a polymerizable double bond-containing group represented by formula (b-1) being bonded to only one of terminals of the main chain thereof, ##STR3## and said monomer is represented by formula (b-4): ##STR4## The photoreceptor exhibits excellent electrostatic characteristics, image formation as well as printing suitability irrespective of variations in environmental conditions or the kind of sensitizing dyes used in combination with the photoreceptor.

公开(公告)号：US5064737A

公开(公告)日：1991-11-12

申请号：US527397

申请日：1990-05-23

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/05

CPC分类号： G03G5/056 ,  G03G5/0589

摘要： An electrophotographic light-sensitive material is disclosed. The material comprises a support having formed thereon a photoconductive layer containing at least inorganic photoconductive particles and a binder resin, wherein the binder resin comprises at least one kind of a resin (A) and at least one kind of a resin (B) as defined in the specification.The electrophotographic light-sensitive material of the present invention has excellent electrostatic characteristics, moisture resistance and durability.

摘要翻译： 公开了一种电子照相感光材料。 该材料包括其上形成有至少含有无机光电导颗粒和粘合剂树脂的光电导层的载体，其中粘合剂树脂包含至少一种树脂（A）和至少一种如所定义的树脂（B） 在规范中。 本发明的电子照相感光材料具有优异的静电特性，耐湿性和耐久性。

公开(公告)号：US5043241A

公开(公告)日：1991-08-27

申请号：US427392

申请日：1989-10-27

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G9/087 ,  G03G9/13

CPC分类号： G03G9/131 ,  Y10S430/105

摘要： A liquid developing agent comprising a resin dispersed in a nonaqueous solvent wherein said comprisecopolymer resin grains produced by polymerization of a solution containing one monofunctional monomer (a) which is soluble in said nonaqueous solvent but is rendered insoluble by polymerization and at least one monomer (B) which contains at least two polar groups and/or polar linkage groups and is represented by ##STR1## in the presence of a resin for dispersion stabilization which is soluble in said nonaquous solvent and is a polymer which has repeating units represented by the general formula (I) below ##STR2##

公开(公告)号：US5041352A

公开(公告)日：1991-08-20

申请号：US473535

申请日：1990-02-01

申请人： Eiichi Kato ,  Kazuo Ishii ,  Hideyuki Hattori

发明人： Eiichi Kato ,  Kazuo Ishii ,  Hideyuki Hattori

IPC分类号： G03G9/13

CPC分类号： G03G9/131 ,  G03G9/133

摘要： A liquid developer for electrostatic photography comprising a resin dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA.cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin is a polymer resin obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the aforesaid non-aqueous solvent but become insoluble after being polymerized, in the presence of a dispersion-stabilizing resin which is soluble in the aforesaid non-aqueous solvent and at least one oligomer (B) having a number average molecular weight of not more than 1.times.10.sup.4 and having at least one polar group selected from a carboxy group, a sulfo group, a hydroxy group, a formyl group, an amino group, a phosphono group, and ##STR1## wherein R.sup.0 represents a hydrocarbon group or --OR.sup.1, (wherein R.sup.1 represents a hydrocarbon group) bonded to only one terminal of the main chain of a polymer composed of a recurring unit represented by following formula (II): ##STR2## wherein V.sup.1, R.sup.2, a.sup.1 and a.sup.2 are as defined in the specification. The liquid developer is excellent in dispersion stability, re-dispersibility, and fixability, and also is capable of forming an offset printing plate having excellent ink-receptivitiy for printing ink and excellent printing durability by electrophotography.

摘要翻译： 一种用于静电照相的液体显影剂，其包含分散在电阻至少为10 9Ω·cm，介电常数不高于3.5的非水溶剂中的树脂，其中所述分散树脂是通过聚合含有 至少一种在可溶于上述非水溶剂的分散稳定树脂和至少一种低聚物的存在下，其可溶于前述非水溶剂但在聚合后变得不溶的单官能单体（A） B）数均分子量不大于1×10 4，并且具有至少一个选自羧基，磺基，羟基，甲酰基，氨基，膦酰基的极性基团， 其中R 0表示烃基或-OR 1（其中R 1表示烃基），其仅与由以重复单元表示的重复单元组成的聚合物的主链的仅一个末端键合 下式（II）：其中V1，R2，a1和a2如说明书中所定义。 液体显影剂的分散稳定性，再分散性和定影性优异，并且还能够形成具有优异的用于印刷油墨的油墨接受性和通过电子照相术获得优异印刷耐久性的胶版印刷版。