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Pigment Surface Modification via Nucleophilic Treating Agents

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Employing chemical reactions that modify particle surfaces to impart desirable physical-chemical properties has enjoyed enormous commercial success. One example is the surface modification of pigment particles for inkjet inks. As the applications of pigmented inkjet inks continue to grow, there is a need to modify a wider range of pigment types. The existence of many classes of pigments with various functional groups has presented challenges for the development of a general chemistry that can react with any pigments. As a result, inventing new ways of modifying pigment surfaces is important. In this report, treating agents having nucleophilic groups were used to modify Pigment Green 36 (PG36). When PG36 was modified with nucleophiles bearing water-soluble groups, pigment particles became water dispersible. Dispersions showed excellent colloidal stability and the color properties of PG36 have not been affected. This paper will also discuss the versatility of this chemistry for introducing a wide range of functional groups onto pigment particles that possess leaving groups.

Document Type: Research Article

Publication date: 2006-01-01

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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