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Surface Modified Pigments for Improved Color in Chemically Prepared Toners

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In the field of electrophotographic printing, the emergence of next-generation printing technologies such as chemically prepared toners (CPT) is changing pigment performance requirements. In conventional toner manufacturing, high shear rates during compounding of the resin and pigment, followed by rapid solidification are necessary to ensure uniform dispersion. In contrast, most chemical toner processes do not rely on mechanical mixing to achieve good pigment dispersion in the toner. CPT processing occurs in the presence of multiple liquid phases. Under these conditions pigments can easily be separated from the resin. Without the benefit of high shear mixing and in the diverse environment of a multi-component CPT system, pigments must now balance ease of dispersibility with resin compatibility. Improving compatibility with the main components of a chemical toner allows the pigments to disperse and to remain dispersed throughout the entire CPT process (processes such as emulsion aggregation and direct polymerization). In response to these challenges, Cabot has developed several surface modification technologies that enable dispersions of pigments in chemical toner systems. In this paper, we will discuss how the improved dispersibility, compatibility, and processability of Cabot's modified pigments in toner resin dramatically improve the resulting color performance. Through proper design of the pigment surface, these benefits can be realized in any one of the well known chemical toner processes.
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Document Type: Research Article

Publication date: 01 January 2009

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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