公开(公告)号：US4937158A

公开(公告)日：1990-06-26

申请号：US349867

申请日：1989-05-10

申请人： James R. Larson

发明人： James R. Larson

IPC分类号： G03G9/12 ,  G03G9/135

CPC分类号： G03G9/135 ,  G03G9/1355

摘要： An electrostatic liquid developer consisting essentially of (A) a nonpolar liquid having a Kauri-butanol value of less than 30, present in major amount; (B) thermoplastic resin particles, less than 30 .mu.m average particle size, having dispersed therein a nickel (II) salt; and a nonpolar liquid soluble ionic or zwitterionic charge director compound. The process of preparation of the electrostatic liquid developer is also described. The liquid developers of the invention are useful in copying, color proofing including digital color proofing, lithographic printing plates, and resists.

公开(公告)号：US4923778A

公开(公告)日：1990-05-08

申请号：US289179

申请日：1988-12-23

申请人： David E. Blair ,  Bradley J. Gollhardt ,  James R. Larson

发明人： David E. Blair ,  Bradley J. Gollhardt ,  James R. Larson

IPC分类号： G03G9/12

CPC分类号： G03G9/12

摘要： Process for preparation of toner particles for electrostatic liquid developers utilizing a single vessel wherein (A) a thermoplastic resin and hydrocarbon liquid having a Kauri-butanol value of less than 120 at a total of solids of at least 22% by weight are dispersed in the vessel by moving particulate media (crating shear) at elevated temperature to plasticize and liquify the resin, (B) while the particulate media are maintained in continuous motion the dispersion is cooled whereby the resin precipitates in the form of toner particle having an average by area particle size of 10 .mu.m or less, and (C) the particulate media are removed. Liquid electrostatic developers are prepared by the addition of a charge director compound. The liquid developers are prepared in a shorter time that previously known processes. The liquid developers are useful for preparation of copies and proofs of various colors.

公开(公告)号：US4783388A

公开(公告)日：1988-11-08

申请号：US63219

申请日：1987-06-17

申请人： Lyla M. El-Sayed ,  James R. Larson

发明人： Lyla M. El-Sayed ,  James R. Larson

IPC分类号： G03G9/12 ,  G03G9/135

CPC分类号： G03G9/1355

摘要： Negative-working electrostatic liquid developer having improved charging characteristics consisting essentially of(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) nonpolar liquid soluble ionic or zwitterionic compound, and(D) a quaternaryammonium hydroxide compound as defined, e.g., tetraethylammonium hydroxide, tetrabutylammonium hydroxide, etc., soluble in an amount of at least 0.5 part per million by weight in the nonpolar liquid.The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.

公开(公告)号：US4780388A

公开(公告)日：1988-10-25

申请号：US53864

申请日：1987-05-26

申请人： James R. Larson

发明人： James R. Larson

IPC分类号： G03G9/12 ,  G03G9/135

CPC分类号： G03G9/135

摘要： Electrostatic liquid developer having improved charging characteristics consisting essentially of(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) nonpolar liquid soluble ionic compound, and(D) at least one organic polyamine compound having at least 2 amino groups present on adjacent carbon atoms.Optionally, a colorant, e.g., a pigment; metallic soap can be present. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.

公开(公告)号：US4702985A

公开(公告)日：1987-10-27

申请号：US856392

申请日：1986-04-28

申请人： James R. Larson

发明人： James R. Larson

IPC分类号： G03G9/12 ,  G03G9/13 ,  G03G9/135

CPC分类号： G03G9/131 ,  G03G9/135 ,  G03G9/1355

摘要： Electrostatic liquid developer having improved charging characteristics comprising(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) nonpolar liquid soluble ionic or zwitterionic compound, and(D) at least one aminoalcohol compound.The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.

公开(公告)号：US4681831A

公开(公告)日：1987-07-21

申请号：US880155

申请日：1986-06-30

申请人： James R. Larson ,  Torence J. Trout

发明人： James R. Larson ,  Torence J. Trout

IPC分类号： C08L101/00 ,  G03G9/13 ,  G03G9/12

CPC分类号： G03G9/131

摘要： A liquid electrostatic developer containing negatively chargeable resin particles with improved charging characteristics, said developer consisting essentially of(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) nonpolar liquid soluble ionic or zwitterionic charge director compound, and(C) resin particles of a polymer containing at least one acidic constituent having a pKa less than 4.5, preferably 3.0, at 25.degree. C. in water and an acid number due to said acidic constituent of at least one. The average resin particle size by area is less than 10 .mu.m. Optionally a colorant and other additives or adjuvants are present. The liquid electrostatic developer is useful in copying making proofs including digital color proofs, lithographic printing plates, and resists.

摘要翻译： 含有具有改进的充电特性的带负电荷的树脂颗粒的液体静电显影剂，所述显影剂基本上由（A）贝壳杉脂丁醇值小于30的非极性液体以主要量存在，（B）非极性液体可溶性离子或两性离子 电荷导向剂化合物，和（C）含有至少一种酸性组分的聚合物的树脂颗粒，其中所述酸性组分在25℃下在水中的pKa小于4.5，优选为3.0，并且由于所述酸性成分至少为1的酸值。 平均树脂粒径按面积计小于10微米。 任选地，存在着色剂和其它添加剂或助剂。 液体静电显影剂可用于复印制作证明，包括数字彩色印版，平版印刷版和抗蚀剂。