公开(公告)号：US07572326B2

公开(公告)日：2009-08-11

申请号：US11736772

申请日：2007-04-18

Applicant: Mark L. Choy ,  Gary W. Byers ,  Yi-Hua Tsao ,  George Sarkisian ,  Keshava A. Prasad ,  Christian Schmid ,  Ervin Mubarekyan

Inventor： Mark L. Choy ,  Gary W. Byers ,  Yi-Hua Tsao ,  George Sarkisian ,  Keshava A. Prasad ,  Christian Schmid ,  Ervin Mubarekyan

IPC: C09D11/02

CPC classification number: C09D11/54 ,  B41M5/0017 ,  B41M7/0018 ,  C09D11/40

Abstract: A fixer fluid for an inkjet ink set includes an aqueous vehicle, and a tri-alkyl-substituted amine-N-oxide. The fixer fluid also includes an acid, a cationic polyelectrolyte, or combinations of the acid and polyelectrolyte(s).

Abstract translation: 用于喷墨油墨组的定影液包括水性载体和三烷基取代的胺-N-氧化物。 定影液还包括酸，阳离子聚电解质，或酸和聚电解质的组合。

公开(公告)号：US06818048B2

公开(公告)日：2004-11-16

申请号：US10001637

申请日：2001-10-30

Applicant: Keshava A. Prasad ,  Amiya K. Chatterjee ,  John M. Gardner ,  Anne M. Kelly-Rowley

Inventor： Keshava A. Prasad ,  Amiya K. Chatterjee ,  John M. Gardner ,  Anne M. Kelly-Rowley

IPC: C09D1102

CPC classification number: C09D11/32 ,  C09D11/30 ,  C09D11/40

Abstract: The present invention provides ink-jet inks for ink-jet printing, comprising from 0.1% to 5% by weight of at least one dye; from 8% to 20% by weight of a diol selected from the group consisting of 1,2-pentanediol, 1,2-hexanediol, and combinations thereof; from 0.1% to 5% by weight of an aliphatic alcohol or aliphatic alcohol mixture; and from 0.1% to 1.5% by weight of at least one component independently selected from the group consisting of buffers, biocides, and metal chelators, with the proviso that no surfactant is present in the ink-jet ink composition. The ink-jet inks formulated according to the present invention provide good dot size, color-to-color bleed alleviation, improved coalescence, less chia, and improved print head materials compatibility.

Abstract translation: 本发明提供了用于喷墨印刷的喷墨油墨，其包含0.1至5重量％的至少一种染料; 8重量％至20重量％的选自1,2-戊二醇，1,2-己二醇及其组合的二醇; 0.1〜5重量％的脂族醇或脂族醇混合物; 和0.1重量％至1.5重量％的至少一种独立选自缓冲剂，杀生物剂和金属螯合剂的组分，条件是在喷墨油墨组合物中不存在表面活性剂。 根据本发明配制的喷墨油墨提供良好的点尺寸，颜色到颜色的渗色减轻，改善的聚结，更少的气质和改善的印刷头材料相容性。

公开(公告)号：US06497479B1

公开(公告)日：2002-12-24

申请号：US09844867

申请日：2001-04-27

Applicant: John L. Stoffel ,  Anne M. Kelly-Rowley ,  Keshava A. Prasad

Inventor： John L. Stoffel ,  Anne M. Kelly-Rowley ,  Keshava A. Prasad

IPC: B41J201

CPC classification number: C09D11/30

Abstract: An inkjet ink is provided that has a greater organic content than prior art inks. However, it is not simply enough to increase the organic content; other factors must be considered as well. These include controlling viscosity and surface tension, as well as maintaining acceptable drytime. An inkjet ink composition that evidences reduced outgassing and reduces paper cockle and curl comprises about 25 to 50 wt % of one or more organic co-solvents, has a viscosity of 10 cp or less, and has a surface tension of 40 dyne/cm or less. Advantageously, using a higher solvent ink reduces cockle and curl. Cockle and curl are also reduced as the water content of the ink is reduced. The present invention uses the higher solvent inks in combination with underprinting. In underprinting, a fixer solution is first “printed” on the print medium, followed by printing the inkjet ink thereon. There is a synergism to this combination. Together, weaknesses of both approaches are addressed. The advantages are a longer life pen, due to the reduction of outgassing of the ink, and reduced cockle and curl.

Abstract translation: 提供了一种具有比现有技术油墨更大的有机物含量的喷墨油墨。 但是，增加有机含量还不够简单。 还必须考虑其他因素。 这些包括控制粘度和表面张力，以及保持可接受的干燥时间。 包含约25〜50重量％的一种或多种有机助溶剂的粘度为10cp或更低的喷墨油墨组合物，其表现出减少的除气和减少纸le le和卷曲的表面张力为40达因/厘米或 减。 有利的是，使用较高溶剂的墨水可以减少鼻孔和卷曲。 随着墨水的含量降低，鸡尾酒和卷曲也减少。 本发明使用较高溶剂油墨与底印组合。 在底印中，定影剂溶液首先在打印介质上“印刷”，随后在其上印刷喷墨油墨。 这种组合有协同作用。 两种方法的缺点在一起得到解决。 优点是寿命长的笔，由于减少了油墨的脱气，并减少了起皱和卷曲。

公开(公告)号：US20130286081A1

公开(公告)日：2013-10-31

申请号：US12990149

申请日：2008-04-29

Applicant: George Sarkisian ,  Keshava A. Prasad ,  Heng Siong Low

Inventor： George Sarkisian ,  Keshava A. Prasad ,  Heng Siong Low

IPC: C09D11/00 ,  B41J2/14

CPC classification number: C09D11/322 ,  B41J2/14016 ,  C09D11/328 ,  C09D11/40

Abstract: Ink sets can include a plurality of aqueous inks. In one embodiment, a first ink can include a magenta dye and a magenta pigment. A second ink can include a cyan pigment, and a third ink can include a yellow pigment, wherein the second and third inks are substantially devoid of dye. The inks can independently include 2-pyrrolidone or 2-hydroxyethyl-2-pyrrolidone and an additional solvent selected from a glycol, a second pyrrolidone, and mixtures thereof. In another embodiment, an aqueous ink-jet ink can comprise a pigment and a liquid vehicle including water, 2-pyrrolidone, 2-hydroxyethyl-2-pyrrolidone, tetraethylene glycol, and 1,6-hexanediol.

Abstract translation: 油墨组可以包括多种水性油墨。 在一个实施方案中，第一油墨可以包括品红色染料和品红色颜料。 第二墨水可以包括青色颜料，第三墨水可以包括黄色颜料，其中第二和第三墨水基本上没有染料。 油墨可以独立地包括2-吡咯烷酮或2-羟乙基-2-吡咯烷酮和另外的选自二醇，第二吡咯烷酮及其混合物的溶剂。 在另一个实施方案中，水性喷墨油墨可以包含颜料和包含水，2-吡咯烷酮，2-羟乙基-2-吡咯烷酮，四甘醇和1,6-己二醇的液体载体。

公开(公告)号：US07722179B2

公开(公告)日：2010-05-25

申请号：US11395979

申请日：2006-03-30

Applicant: Ervin Mubarekyan ,  George M. Sarkisian ,  Keshava A. Prasad ,  Richard Anderson

Inventor： Ervin Mubarekyan ,  George M. Sarkisian ,  Keshava A. Prasad ,  Richard Anderson

IPC: C09D11/00

CPC classification number: C09D11/54 ,  C09D11/30

Abstract: An inkjet fixer composition and a printing method and system used with the composition are disclosed herein. The composition includes: a) from 1 to 8 weight percent cationic polymer; and b) from 0 to 2 weight percent of at least one surfactant selected from the group consisting of nonionic surfactant, cationic surfactant and combinations thereof; and c) an aqueous liquid vehicle. Upon overprinting the fixer composition with an ink-jet ink on a substrate, the fixer composition vehicle and the ink-jet ink vehicle form a vehicle mixture on the substrate after which the vehicle mixture penetrates into the substrate, and an ink image is formed on the substrate.

Abstract translation: 本文公开了喷墨定影剂组合物和与该组合物一起使用的印刷方法和系统。 组合物包括：a）1至8重量％的阳离子聚合物; 和b）0至2重量％的至少一种选自非离子表面活性剂，阳离子表面活性剂及其组合的表面活性剂; 和c）水性液体载体。 当在基板上用喷墨油墨对定影剂组合物进行印刷时，定影剂组合物载体和喷墨油墨载体在基材上形成车辆混合物，之后车辆混合物渗透到基材中，并且油墨图像形成在 底物。

公开(公告)号：US06247808B1

公开(公告)日：2001-06-19

申请号：US09064706

申请日：1998-04-22

Applicant: Zeying Ma ,  Keshava A. Prasad

Inventor： Zeying Ma ,  Keshava A. Prasad

IPC: G01D1100

CPC classification number: C09D11/40 ,  B41J2/195

Abstract: An ink-jet printing system is disclosed comprising a set of ink-jet inks comprising a first anionic ink comprising an aqueous vehicle, at least one first colorant, and at least one first anionic polymer; a second anionic ink comprising an aqueous vehicle; at least one second colorant, at least one second anionic polymer, and an acid additive having a pKa up to the pKa of the at least first polymer of the first ink; a third cationic ink comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic ink comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent. The printing system provides improved print quality, specifically, reduced bleed; improved edge-acuity, uniform area fills, and color quality; while maximizing lightfastness without sacrificing printing reliability.

Abstract translation: 公开了一种喷墨打印系统，其包括一组喷墨油墨，其包括含有水性载体的第一阴离子油墨，至少一种第一着色剂和至少一种第一阴离子聚合物; 包含水性载体的第二阴离子油墨; 至少一种第二着色剂，至少一种第二阴离子聚合物和具有pKa直至第一种油墨的至少第一种聚合物的pKa的酸性添加剂; 第三阳离子油墨，其包含水性载体，至少一种第三着色剂，至少一种第三阳离子聚合物和约2至约5的pH; 和包含水性载体，至少一种第四阴离子染料和沉淀剂的第四种阴离子油墨。 打印系统提供改进的打印质量，特别是减少出血; 改善边缘敏锐度，均匀区域填充和颜色质量; 同时最大化耐光性而不牺牲打印可靠性。

公开(公告)号：US5356464A

公开(公告)日：1994-10-18

申请号：US160703

申请日：1993-12-01

Applicant: Mark S. Hickman ,  Loren E. Johnson ,  John L. Stoffel ,  Ronald A. Askeland ,  Catherine B. Hunt ,  Howard Matrick ,  Keshava A. Prasad ,  John T. Rich ,  Leonard Slevin ,  John R. Moffatt

Inventor： Mark S. Hickman ,  Loren E. Johnson ,  John L. Stoffel ,  Ronald A. Askeland ,  Catherine B. Hunt ,  Howard Matrick ,  Keshava A. Prasad ,  John T. Rich ,  Leonard Slevin ,  John R. Moffatt

IPC: C09D11/00 ,  C09D11/02

CPC classification number: C09D11/30

Abstract: Aqueous ink compositions containing anti-curl agents substantially reduce or eliminate paper curl in plain-paper printed elements without adversely effecting storage stability, decap properties or print quality, and thus eliminate the need for expensive and bulky mechanical curl-arresting devices or special curl-resistant substrates. Printing the inks on plain-paper substrates is the sole step in a process for reducing paper curl in plain-paper printed elements.

Abstract translation: 含有抗卷发剂的水性油墨组合物在普通纸印刷元件中基本上减少或消除纸张卷曲，而不会不利地影响储存稳定性，剥离性能或打印质量，因此不需要昂贵且庞大的机械卷曲装置或特殊卷曲装置， 耐性基材。 在普通纸基材上印刷油墨是在普通纸印刷元件中减少纸张卷曲的过程中的唯一步骤。

公开(公告)号：US08857963B2

公开(公告)日：2014-10-14

申请号：US12990149

申请日：2008-04-29

Applicant: George Sarkisian ,  Keshava A. Prasad ,  Heng Siong Low

Inventor： George Sarkisian ,  Keshava A. Prasad ,  Heng Siong Low

IPC: C09D11/00 ,  B41J2/14 ,  C09D11/322 ,  C09D11/40 ,  C09D11/328

CPC classification number: C09D11/322 ,  B41J2/14016 ,  C09D11/328 ,  C09D11/40

Abstract: Ink sets can include a plurality of aqueous inks. In one embodiment, a first ink can include a magenta dye and a magenta pigment. A second ink can include a cyan pigment, and a third ink can include a yellow pigment, wherein the second and third inks are substantially devoid of dye. The inks can independently include 2-pyrrolidone or 2-hydroxyethyl-2-pyrrolidone and an additional solvent selected from a glycol, a second pyrrolidone, and mixtures thereof. In another embodiment, an aqueous ink-jet ink can comprise a pigment and a liquid vehicle including water, 2-pyrrolidone, 2-hydroxyethyl-2-pyrrolidone, tetraethylene glycol, and 1,6-hexanediol.

Abstract translation: 油墨组可以包括多种水性油墨。 在一个实施方案中，第一油墨可以包括品红色染料和品红色颜料。 第二墨水可以包括青色颜料，第三墨水可以包括黄色颜料，其中第二和第三墨水基本上没有染料。 油墨可以独立地包括2-吡咯烷酮或2-羟乙基-2-吡咯烷酮和另外的选自二醇，第二吡咯烷酮及其混合物的溶剂。 在另一个实施方案中，水性喷墨油墨可以包含颜料和包含水，2-吡咯烷酮，2-羟乙基-2-吡咯烷酮，四甘醇和1,6-己二醇的液体载体。

公开(公告)号：US20140253650A1

公开(公告)日：2014-09-11

申请号：US14350779

申请日：2011-10-28

Applicant: George Sarkisian ,  Keshava A. Prasad ,  John Morrow Gardner ,  Tayo Olu Yolemi

Inventor： George Sarkisian ,  Keshava A. Prasad ,  John Morrow Gardner ,  Tayo Olu Yolemi

IPC: C09D11/00

CPC classification number: C09D11/322 ,  C09D11/38 ,  C09D11/40

Abstract: The present disclosure is drawn to ink-jet ink sets, as well as related systems and methods. In one example, an ink set for ink-jet printing can comprise a cyan ink-jet ink including from about 2 wt % to about 5 wt % of a cyan pigment admixed in a first ink vehicle; a magenta ink-jet ink including a magenta colorant comprising from about 2 wt % to about 5 wt % of a magenta pigment and about 0.1 wt % to about 1 wt % of a slightly soluble magenta dye admixed in a second ink vehicle; and a yellow ink-jet ink including from about 2 wt % to about 5 wt % of a yellow pigment admixed in a third ink vehicle.

Abstract translation: 本公开涉及喷墨墨水组以及相关系统和方法。 在一个实例中，用于喷墨印刷的油墨组可以包括青色喷墨油墨，其包含在第一油墨载体中混合的约2重量％至约5重量％的青色颜料; 包括品红色着色剂的品红色喷墨油墨，其包含约2重量％至约5重量％的品红色颜料和约0.1重量％至约1重量％的在第二油墨载体中混合的微溶性品红染料; 以及黄色喷墨油墨，其包含在第三油墨载体中混合的约2重量％至约5重量％的黄色颜料。

公开(公告)号：US06682589B2

公开(公告)日：2004-01-27

申请号：US10002066

申请日：2001-10-30

Applicant: Peter C. Morris ,  Stephen W. Bauer ,  Shirley Lee ,  Keshava A. Prasad ,  Jeffrey H. Barr

Inventor： Peter C. Morris ,  Stephen W. Bauer ,  Shirley Lee ,  Keshava A. Prasad ,  Jeffrey H. Barr

IPC: C09D1100

CPC classification number: C09D11/40

Abstract: A specific dye set for formulating yellow, cyan, magenta, and black inks comprises Direct Yellow 132, at least one other yellow dye, Direct Blue 199, a magenta dye comprising a dye having the structure and, optionally, Pacified Reactive Black 31, respectively. The dye set provides excellent ink-jet prints having excellent lightfastness when exposed to office light, excellent imaging onto glossy inkjet media, and large color gamut which substantially encompasses the color space for a silver halide reference print. The aqueous inks each comprise from about 0.1 to about 5 wt % of at least one dye with the black ink comprising from about 0.5 to about 5 wt % of at least one colorant; from about 5 to about 20 wt % of at least one organic solvent; 0 to about 1.5 wt % of at least one component independently selected from the group consisting of surfactants, buffers, biocides, and metal chelators; and the balance water.

Abstract translation: 用于配制黄色，青色，品红色和黑色油墨的特定染料组合物包括直接黄132，至少一种其它黄色染料，直接蓝199，品红色染料，其分别包含具有结构的染料和任选的安定活性黑31。 染料组提供了出色的喷墨印刷品，当暴露于办公室光下时具有优异的耐光性，在光泽喷墨介质上的优异成像以及基本上包含卤化银参考印刷品的色彩空间的大色域。 水性油墨各自包含约0.1至约5重量％的至少一种染料，黑色油墨包含约0.5至约5重量％的至少一种着色剂; 约5至约20重量％的至少一种有机溶剂; 0至约1.5重量％的至少一种独立选自表面活性剂，缓冲剂，杀生物剂和金属螯合剂的组分; 和平衡水。