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Volume: 25 | Article ID: art00014_1
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Surface Modified Pigments for Improved Color in Chemically Prepared Toners
  DOI :  10.2352/ISSN.2169-4451.2009.25.1.art00014_1  Published OnlineJanuary 2009
Abstract

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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Joseph B. Carroll, Joshua Chase, Trung Truong, Angelos Kyrlidis, Eilidh Bedford, "Surface Modified Pigments for Improved Color in Chemically Prepared Tonersin Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP25),  2009,  pp 39 - 42,  https://doi.org/10.2352/ISSN.2169-4451.2009.25.1.art00014_1

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