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    Restoration of black to color bleed performance of amphoteric pigment dispersion based inks of low pigment loads
    4.
    发明申请
    Restoration of black to color bleed performance of amphoteric pigment dispersion based inks of low pigment loads 有权
    双色颜料分散型油墨低颜料负载的黑色到彩色渗色性能的恢复

    公开(公告)号：US20060092252A1

    公开(公告)日：2006-05-04

    申请号：US11239728

    申请日：2005-09-29

    申请人： Palitha Wickramanayake

    发明人： Palitha Wickramanayake

    IPC分类号： G01D11/00 ,  C09D11/02

    CPC分类号： C09D11/322 ,  C09D11/40

    摘要： In one aspect of the present system and method, a pigment-based ink includes an acidic pigment-based ink formulation, and a pigment load less than 5 weight percent, where an amphoteric dispersant maintains the pigment distributed in the acidic pigment-based ink formulation, wherein the amphoteric dispersant has an isoelectric point, and wherein the amphoteric dispersant has a higher isoelectric point than the pH of the acidic pigment-based ink formulation.

    摘要翻译： 在本系统和方法的一个方面，颜料基油墨包括酸性颜料基油墨配方和小于5重量％的颜料负载，其中两性分散剂保持颜料分布在酸性颜料基油墨配方中 其中所述两性分散剂具有等电点，并且其中所述两性分散剂具有比所述酸性颜料基油墨配方的pH更高的等电点。

    Amphoteric pigment dispersion containing ink formulations, methods of using ink formulations, and systems using ink formulations
    5.
    发明申请
    Amphoteric pigment dispersion containing ink formulations, methods of using ink formulations, and systems using ink formulations 有权
    含有油墨配方的两性颜料分散体，使用油墨配方的方法和使用油墨配方的体系

    公开(公告)号：US20060092250A1

    公开(公告)日：2006-05-04

    申请号：US10975705

    申请日：2004-10-28

    申请人： Palitha Wickramanayake

    发明人： Palitha Wickramanayake

    IPC分类号： G01D11/00 ,  C09D11/02

    CPC分类号： C09D11/326 ,  C09D11/40

    摘要： Ink-jet ink sets, pigment-based ink formulations, methods of printing, and methods of enhancing print quality, are disclosed. One exemplary ink-jet ink set, among others, includes a pigment-based ink formulation at a first pH, including: a pigment, and an amphoteric dispersant having an isoelectric point; and a second ink formulation at a second pH, wherein the first pH and the second pH are each selected from an acidic pH and a basic pH, wherein the first pH and the second pH are not the same, and wherein the amphoteric dispersant has a higher isoelectric point than the first pH when the dispersant is acidic, and a lower isoelectric point than the first pH when the dispersant is basic.

    摘要翻译： 公开了喷墨油墨组，颜料基油墨配方，印刷方法和增强印刷质量的方法。 一种示例性喷墨油墨组，其中包括在第一pH下的颜料基油墨配方，包括：颜料和具有等电点的两性分散剂; 和在第二pH下的第二油墨配制剂，其中第一pH和第二pH各自选自酸性pH和碱性pH，其中第一pH和第二pH不相同，并且其中两性分散剂具有 当分散剂为酸性时，比第一pH高的等电点，当分散剂为碱性时，等电点低于第一pH。

    Inks containing glycol ethers and specific polymers for dry time and bleed improvements in ink-jet printing inks
    6.
    发明授权
    Inks containing glycol ethers and specific polymers for dry time and bleed improvements in ink-jet printing inks 有权
    含有二醇醚和特定聚合物的油墨用于干燥时间和喷墨印刷油墨中的渗色改进

    公开(公告)号：US06300391B2

    公开(公告)日：2001-10-09

    申请号：US09411362

    申请日：1999-10-01

    申请人： Dennis P Parazak ,  Palitha Wickramanayake

    发明人： Dennis P Parazak ,  Palitha Wickramanayake

    IPC分类号： C09D1110

    CPC分类号： C09D11/30 ,  C09D11/40

    摘要： The ink set of this invention comprises at least two inks, one of which contains a pH sensitive polymer, a glycol ether, and preferably a self-dispersing pigment colorant. A second ink is provided which comprises incompatible inorganic or organic salts or has an appropriate pH. The polymer precipitates onto a medium upon contact with the second ink, thereby providing improved dry time as well as bleed and halo control.

    摘要翻译： 本发明的油墨组包含至少两种油墨，其中之一含有pH敏感聚合物，二醇醚，优选自分散颜料着色剂。 提供第二种油墨，其包含不相容的无机或有机盐或具有适当的pH。 聚合物在与第二种墨接触时沉淀在介质上，从而提供改善的干燥时间以及渗色和光晕控制。

    Black to color bleed control in ink-jet printing inks
    7.
    发明授权
    Black to color bleed control in ink-jet printing inks 失效
    喷墨印刷油墨中的黑色渗色控制

    公开(公告)号：US6036759A

    公开(公告)日：2000-03-14

    申请号：US70858

    申请日：1998-04-30

    申请人： Palitha Wickramanayake ,  Raymond J. Adamic

    发明人： Palitha Wickramanayake ,  Raymond J. Adamic

    IPC分类号： B41J2/01 ,  B41J29/00 ,  B41M5/00 ,  C09D11/00 ,  C09D11/02

    CPC分类号： C09D11/40

    摘要： The ink set of this invention comprises an anionic black pigmented ink and at least one color ink containing a dye or pigment colorant. The performance of these ink sets is improved by the addition of specific cationic surfactant or cationic (quaternary) salts which interact with the anionic black pigmented ink to provide improved black to color bleed control.

    摘要翻译： 本发明的油墨组包括阴离子黑色着色油墨和至少一种含有染料或颜料着色剂的彩色油墨。 通过添加与阴离子黑色着色油墨相互作用的特定阳离子表面活性剂或阳离子（四元）盐来提高这些油墨组的性能，以提供改进的黑色到颜色渗色控制。

    Bleed-alleviated, waterfast, pigment-based ink-jet ink compositions
    8.
    发明授权
    Bleed-alleviated, waterfast, pigment-based ink-jet ink compositions 失效
    渗透缓和的，防水的，基于颜料的喷墨油墨组合物

    公开(公告)号：US5531816A

    公开(公告)日：1996-07-02

    申请号：US528077

    申请日：1995-09-14

    申请人： Palitha Wickramanayake

    发明人： Palitha Wickramanayake

    IPC分类号： C09D11/00 ,  C09D11/02

    CPC分类号： C09D11/322

    摘要： Bleed control and fast dry times are achieved in pigment-based ink-jet ink compositions by formulating the ink compositions to include at least one appropriately modified pigment in a water-insoluble organic compound, which is microemulsified with an amphiphile and water. By employing a vehicle formulated in accordance with the invention, the present pigment-based ink-jet ink compositions are bleed-free and fast-drying and exhibit the inherent waterfastness of pigments. Moreover, the use of a modified pigment improves print quality by passivating the pigment particles to eliminate agglomerations between the particles and by providing pigment particles of substantially uniform size, thereby yielding more uniform thickness and coverage on a print medium. In short, pigment-based ink-jet ink compositions formulated in accordance with the invention offer the best qualities of pigments as colorants while reducing or eliminating the problems conventionally associated therewith.

    摘要翻译： 通过配制油墨组合物以在水不溶性有机化合物中包含至少一种适当改性的颜料，其用两亲物和水进行微乳化，从而在颜料基喷墨油墨组合物中实现了渗色控制和快速干燥时间。 通过使用根据本发明配制的载体，本发明的颜料基喷墨油墨组合物是无渗透和快干的并且表现出颜料固有的耐水性。 此外，改性颜料的使用通过钝化颜料颗粒以消除颗粒之间的团聚并通过提供基本均匀尺寸的颜料颗粒来改善印刷质量，从而在印刷介质上产生更均匀的厚度和覆盖。 简而言之，根据本发明配制的颜料基喷墨油墨组合物提供颜料作为着色剂的最佳品质，同时减少或消除常规与之相关的问题。

    Ink composition
    10.
    发明授权
    Ink composition 有权
    墨水组成

    公开(公告)号：US09193884B2

    公开(公告)日：2015-11-24

    申请号：US14354650

    申请日：2011-12-22

    申请人： Sundar Vasudevan ,  Richard J. McManus ,  Palitha Wickramanayake

    发明人： Sundar Vasudevan ,  Richard J. McManus ,  Palitha Wickramanayake

    IPC分类号： C09D11/02 ,  C09D11/38 ,  B41J2/165 ,  B41J2/175 ,  C09D175/04

    CPC分类号： C09D11/38 ,  B41J2/165 ,  B41J2/17503 ,  C09D175/04

    摘要： An ink composition includes a colorant, a co-solvent, and an acid chosen from oleic acid, linoleic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, and combinations thereof. The ink composition further includes lithium and water. An anti-evaporative layer forms, during uncapped non-use, at an interface between air and the ink composition in an orifice of a nozzle, thereby reducing evaporation of the water from the ink composition.

    摘要翻译： 油墨组合物包括着色剂，助溶剂和选自油酸，亚油酸，十一烷酸，十二烷酸，十三烷酸及其组合的酸。 油墨组合物还包括锂和水。 在非封盖不使用期间，在喷嘴的孔口中的空气和油墨组合物之间的界面处形成防蒸发层，从而减少水从油墨组合物的蒸发。