公开(公告)号：US5178983A

公开(公告)日：1993-01-12

申请号：US524956

申请日：1990-05-18

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

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

CPC分类号： G03G5/0592 ,  G03G5/0589

摘要： An electrophotographic light-sensitive material comprising a support having thereon a photoconductive layer containing at least inorganic phohtoconductive particles and a binder resin, wherein the binder resin contains (A) at least one resin comprising a graft copolymer having a weight average molecular weight of from 1.0.times.10.sup.3 to 2.0.times.10.sup.4 and containing, as copolymer components, at least (i) a monofunctional macromonomer (M) having a weight average molecular weight of not more than 2.times.10.sup.4 and containing at least one polymer component represented by formula (IIa) or (IIb) shown below and at least one polymer component having at least one polar group selected from the group consisting of --COOH, --PO.sub.3 H.sub.2, --SO.sub.3 H, --OH, and ##STR1## wherein R.sub.1 represents a hydrocarbon group or --OR.sub.2 (wherein R.sub.2 represents a hydrocarbon group), with a polymerizable double bond group represented by formula (I) shown below being bonded to one terminal of the main chain thereof, and (ii) a monomer represented by formula (III) shown below, and (B) at least one resin having a weight average molecular weight of not less than 5.times.10.sup.4, containing at least a recurring unit represented by formula (IV) shown below as a polymer component, and having a crosslinked structure ##STR2## wherein X.sub.0 represents --COO--, --OCO--, --CH.sub.2 OCO--, --CH.sub.2 COO--, --O--, --SO.sub.2, --CO--, --CONHCOO--, --CONHCONH--, --CONHSO.sub.2 --, ##STR3## wherein R.sub.11 represents a hydrogen atom or a hydrocarbon group; a.sub.1 and a.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group, --COO--Z.sub.1, or --COO--Z.sub.1 bonded through a hydrocarbon group (wherein Z.sub.1 represents a substituted or unsubstituted hydrocarbon group) ##STR4## wherein X.sub.1 has the same meaning as X.sub.0 ; Q.sub.1 represents an aliphatic group having from 1 to 18 carbon atoms or an aromatic group having from 6 to 12 carbon atoms; b.sub.1 and b.sub.2, which may be the same or different, each has the same meaning as a.sub.1 and a.sub.2 ; V represents --CN, --CONH.sub.2, or ##STR5## wherein Y represents a hydrogen atom, a halogen atom, a hydrocarbon group, an alkoxyl group, or --COOZ.sub.2, wherein Z.sub.2 represents an alkyl group, an aralkyl group, or an aryl group ##STR6## wherein X.sub.2 has the same meaning as X.sub.0 in formula (I); Q.sub.2 has the same meaning as Q.sub.1 in formula (IIa); and c.sub.1 and c.sub.1, which may be the same or different, have the same meaning as a.sub.1 and a.sub.2 in formula (I) ##STR7## wherein X.sub.3 represents --COO--, --OCO--, --CH.sub.2 OCO--, --CH.sub.2 COO--, --O--, or --SO.sub.2 --; Q.sub.3 represents a hydrocarbon group having from 1 to 22 carbon atoms; and d.sub.1 and d.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group having from 1 to 8 carbon atoms, --COO--Z.sub.3, or --COO--Z.sub.3 bonded through a hydrocarbon group having from 1 to 8 carbon atoms, wherein Z.sub.3 represents a hydrocarbon group having from 1 to 18 carbon atoms.

公开(公告)号：US5112713A

公开(公告)日：1992-05-12

申请号：US527451

申请日：1990-05-23

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： C08F2/48 ,  C08F290/00 ,  C08F299/00 ,  C08L33/04 ,  C08L33/14 ,  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 thereon a photoconductive layer containing at least inorganic photoconductive particles and a binder resin, wherein the binder resin contains (A) at least one resin comprising a graft copolymer having a weight average molecular weight of from 1.0.times.10.sup.3 to 2.0.times.10.sup.4 and containing, as copolymer components, at least (A-i) a monofunctional macromonomer having a weight average molecular weight of not more than 2.times.10.sup.4.

公开(公告)号：US5104760A

公开(公告)日：1992-04-14

申请号：US550841

申请日：1990-07-10

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： C08L35/00 ,  C08L43/02 ,  G03G5/05

CPC分类号： G03G5/0592 ,  C08L35/00 ,  C08L43/02 ,  G03G5/0589 ,  Y10S430/111

摘要： An electrophotographic light-sensitive material comprising a support having at least one photoconductive layer containing an inorganic photoconductive substance and a binder resin comprising (A) at least one resin containing not less than 30% by weight of a copolymerizable component corresponding to a repeating unit represented by the general formula (I) and having at least one acidic group selected from the group consisting of --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, --OH ##STR1## (wherein R represents a hydrocarbon group of --OR' (wherein R' represents a hydrocarbon group)) and a cyclic acid anhydride-containing group at one of the terminals of the main chain thereof; ##STR2## wherein a.sub.1 and a.sub.2 each represents a hydrogen atom, a halogen atom, a cyano group or a hydrocarbon group; and R.sub.1 represents a hydrocarbon group; and (B) at least one copolymer resin containing at least one polyester type macromonomer represented by the following general formula (IIIa), (IIIb), (IIIc), or (IIId): ##STR3## wherein the group in the brackets represents a recurring unit; c.sub.1 and c.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group having from 1 to 8 carbon atoms, --COO--V.sub.1, or --COO--V.sub.2 bonded through a hydrocarbon group having from 1 to 8 carbon atoms (wherein V.sub.1 and V.sub.2 each represents a hydrocarbon group having from 1 to 18 carbon atoms); X.sub.1 represents a direct bond, --COO--, --OCO--, --CH.sub.2).sub.l.sbsb.1 COO--, --CH.sub.2).sub.l.sbsb.2 OCO-- (wherein l.sub.1 and l.sub.2 each represents an integer of from 1 to 3), ##STR4## wherein d.sub.1 represent a hydrogen atom or a hydrocarbon group having from 1 to 12 carbon atoms, --CONHCONH--, --CONHCOO--, --O--, ##STR5## or --SO.sub.2 --; Y.sub.1 represents a group bonding X.sub.1 to --COO--; W.sub.1 and W.sub.2, which may be the same or different, each represents a divalent aliphatic group, a divalent aromatic group (each of the aforesaid groups may have, in the bond of each divalent organic moiety, at least one bonding group selected from --O--, --S--, wherein d.sub.2 represents a hydrogen atom or a hydrocarbon group having from 1 to 12 carbon atoms), --SO.sub.2 --, --COO--, --OCO--, --CONHCO--, --NHCONH--, ##STR6## (wherein d.sub.3 has the same meaning as d.sub.2), ##STR7## (wherein d.sub.4 has the same meaning as d.sub.2), and ##STR8## or an organic moiety composed of a combination of these moieties; R.sub.31 represents a hydrogen atom or a hydrocarbon group; c.sub.3 and c.sub.4 have the same meaning as c.sub.1 and c.sub.2 ; X.sub.2 has the same meaning as X.sub.1 ; Y.sub.2 represents a group bonding X.sub.2 to --COO--; W.sub.3 represents a divalent aliphatic group; R.sub.32 has the same meaning as R.sub.31 ; R.sub.31 ' represents a hydrogen atom, a hydrocarbon group or --COR.sub.33 ' (wherein R.sub.33 ' represents a hydrocarbon group); Y.sub.1, represents a group bonding X.sub.1 to Z.sub.1 ; Z.sub.1 represents --CH.sub.2 --, --O--, or --NH--; Y.sub.2' represents a group bonding X.sub.2 to Z.sub.2 ; Z.sub.2 has the same meaning as Z.sub.1 ; and R.sub.32 ' has the same meaning as R.sub.31 '.

公开(公告)号：US5077165A

公开(公告)日：1991-12-31

申请号：US538053

申请日：1990-06-13

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

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

CPC分类号： G03G5/0596 ,  G03G5/0589

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, and said binder resin contains at least one of Resin A having a weight average molecular weight of 1.times.10.sup.3 to 2.times.10.sup.4 and Resin B having a weight average molecular weight of at least 3.times.10.sup.4.

摘要翻译： 提供油性敏感性优异的平版印刷版原版，由此原版被忠实地再现而不会出现作为偏移母版的全部或点状污渍，其包括导电性支持体和设置在其上的至少一个光电导层，其含有光导电性锌 氧化物和粘合剂树脂，其中所述光电导层含有平均粒径等于或小于所述光电导氧化锌颗粒的最大晶粒直径的亲水性树脂颗粒，并且所述粘合剂树脂含有至少一种具有 重均分子量为1×10 3〜2×10 4，树脂B的重均分子量为3×10 4以上。

公开(公告)号：US5049468A

公开(公告)日：1991-09-17

申请号：US427423

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 ,  G03G9/12 ,  G03G9/13

CPC分类号： G03G9/131

摘要： A liquid developer for an electrostatic photography comprising a non-aqueous solvent whose electrical resistance is at least 10.sup.9 .OMEGA.cm and whose dielectric constant not more than 3.5 with a resin dispersed wherein the dispersed resin particles are copolymer resin particles obtained by a polymerization reaction, of a solution which contains a monofunctional monomer (A) which is soluble in the non-aqueous solvent but which is rendered insoluble by polymerization and a monofunctional macromonomer (B) whose number average molecular weight is not more that 10.sup.4 obtained by bonding a polymerizable double bond group;to only one end of the main chain of a polymerin the presence of a soluble resin for dispersion stabilization purposes obtained by bonding an acid group to just one end of at least the polymer main chain.

公开(公告)号：US5035971A

公开(公告)日：1991-07-30

申请号：US427386

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 ,  G03G9/12 ,  G03G9/13

CPC分类号： G03G9/131

摘要： An electrostatic photographic liquid developer comprising a nonaqueous solvent with an electric resistance of 10.sup.9 .OMEGA.cm or more and a dielectric constant of 3.5 or less, having a resin dispersed therein, wherein dispersion resin particles are copolymer resin particles obtained by the copolymerization reaction of solutions containing at least one monofunctional monomer (A) which is soluble in the nonaqueous solvent but which is rendered insoluble by polymerization, and monomer (B) which is represented by the general formula (II) below ##STR1## wherein R.sup.1 represents an aliphatic group with 8 or more carbon atoms;T represents --COO--, --CONH--, ##STR2## where R.sup.2 represents an aliphatic group, --OCO--, --CH.sub.2 COO-- or --O--; andb.sup.1 and b.sup.2, which may be the same or different, each represents a hydrogen atom, an alkyl group, a --COOR.sup.3 group or a --CH.sub.2 --COOR.sup.3 group, where R.sup.3 represents an aliphatic group, which contains an aliphatic group with 8 or more carbon atoms and which produces a copolymer by polymerization with monomer (A); in the presence of a dispersion stabilization resin which is soluble in the nonaqueous solvent, which comprises an acidic group selected from the group consisting of a --PO.sub.3 H.sub.2 group, an --SO.sub.3 H group, a --COOH group, an --OH group, an --SH group, or a ##STR3## group, where R.sup.0 denotes a hydrocarbon bonded only to one terminal of at least one main polymer chain and which is a polymer containing the repeating unit represented by the following general formula (I) ##STR4## wherein X.sup.1 represents --COO--, --OCO--, --CH.sub.2 OCO--, --CH.sub.2 COO--, --O-- or --SO.sub.2 --;Y.sup.1 represents an aliphatic group with 6 to 32 carbon atoms; anda.sup.1 and a.sup.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group with 1 to 8 carbon atoms, a--COO--Z.sup.1 group, or a --COO--Z.sup.1 group linked via a hydrocarbon group with 1 to 8 carbon atoms, where Z.sup.1 represents a hydrocarbon group with 1 to 22 carbon atoms; and wherein a portion of said polymer is crosslinked.

公开(公告)号：US5009975A

公开(公告)日：1991-04-23

申请号：US417105

申请日：1989-10-04

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/05

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

摘要： An electrophotographic photoreceptor comprising a support having thereon at least one photoconductive layer containing at least an inorganic photoconductive material and a binder resin, wherein the binder resin contains(A) at least one resin having a weight average molecular weight of from 1.times.10.sup.3 to 3.times.10.sup.4 with at least one substituent selected from the group consisting of --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, ##STR1## wherein R represents a hydrocarbon group having from 1 to 10 carbon atoms or --OR', wherein R' represents a hydrocarbon group having from 1 to 10 carbon atoms, and a cyclic acid anhydride-containing group, being bonded to one or both of the terminals of the polymer main chain thereof, and(B) at least one resin having a weight average molecular weight of 5.times.10.sup.4 or more and containing, as a polymerization component, at least a repeating unit represented by formula (b-i): ##STR2## wherein T represents --COO--, --OCO--, --CH.sub.2 OCO--, --CH.sub.2 COO--, --O-- or --SO.sub.2 --; V represents a hydrocarbon group having from 1 to 22 carbon atoms; and a.sub.1 and a.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group having from 1 to 8 carbon atoms, --COO--Z, or --COO--Z bonded via a hydrocarbon group having from 1 to 8 carbon atoms, wherein Z represents a hydrocarbon group having from 1 to 18 carbon atoms; and wherein said Resin (B) is partially crosslinked. The photoreceptor exhibits excellent electrostatic characteristics, image forming performance as well as printing suitability regardless of a change in environmental conditions or the kind of sensitizing dye used in combination with the photoreceptor.

公开(公告)号：US4954407A

公开(公告)日：1990-09-04

申请号：US414334

申请日：1989-09-29

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 ,  Y10S430/111

摘要： An electrophotographic photoreceptor comprising a support having thereon at least one photoconductive layer containing at least inorganic photoconductive particles and a binder resin, wherein said binder resin has a weight average molecular weight of from 1.times.10.sup.3 to 5.times.10.sup.4 and comprises (A) at least one resin comprising, as a polymerization component, (a-i) not less than 30% by weight of at least one repeating unit represented by formula (I) or (II): ##STR1## wherein X.sub.1 and X.sub.2, which may be the same or different, 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 bond or a linking group containing from 1 to 4 linking atoms which connects --COO-- and the benzene ring, with at least one acidic group selected from the group consisting of (i) --PO.sub.3 H.sub.2, (ii) --SO.sub.3 H, (iii) --COOH, ##STR2## wherein R represents a hydrocarbon group having from 1 to 10 carbon atoms or --OR', wherein R' represents a hydrocarbon group having from 1 to 10 carbon atoms, and (v) a cyclic acid anhydride-containing group, being bonded to only one of the terminals of the polymer main chain thereof. The photoreceptor exhibits excellent electrostatic characateristics, image formation performance 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：US4880716A

公开(公告)日：1989-11-14

申请号：US154547

申请日：1988-02-10

申请人： Eiichi Kato ,  Kazuo Ishii

发明人： Eiichi Kato ,  Kazuo Ishii

IPC分类号： G03G5/147

CPC分类号： G03G5/14786

摘要： An electrophotographic lithographic printing plate precursor comprising a conductive support having provided thereon at least one photoconductive layer and further provided thereon an outermost surface layer is disclosed, in which said surface layer contains at least one resin having at least one functional group capable of forming a carboxyl group upon decomposition which is represented by formula (I): ##STR1## wherein x is as defined in the specification. The surface layer can be rendered highly hydrophilic while exhibiting water resistance when subjected to oil-desensitization processing after toner image formation to provide a lithographic printing plate having excellent printing durability.

公开(公告)号：US4828952A

公开(公告)日：1989-05-09

申请号：US45998

申请日：1987-05-04

申请人： Eiichi Kato ,  Kazuo Ishii ,  Ryosuke Itakura ,  Hidefumi Sera

发明人： Eiichi Kato ,  Kazuo Ishii ,  Ryosuke Itakura ,  Hidefumi Sera

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

CPC分类号： G03G5/0589 ,  G03G5/055

摘要： An electrophotographic printing plate precursor is disclosed, comprising a conductive support having provided thereo1 at least one photoconductive layer containing photoconductive zinc oxide and at least one resin binder, wherein said resin binder contains at least one functional group capable of forming at least one hydroxyl group and at least one carboxyl group upon decomposition. The printing plate precursor can reproduce an image faithful to an original and exhibits satisfactory surface smoothness and electrostatic characteristics. The printing plate produced from the precursor does not cause background stains and exhibits excellent printing durability.

摘要翻译： 公开了一种电子照相印版前体，其包括导电载体，其上设置有至少一个含有光电导氧化锌和至少一种树脂粘合剂的光电导层，其中所述树脂粘合剂含有至少一个能够形成至少一个羟基的官能团和 分解时至少有一个羧基。 印版前体可以再现忠实于原稿的图像，并且表现出令人满意的表面光滑度和静电特性。 由前体制成的印版不会引起背景污渍并且显示出优异的印刷耐久性。