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The Use of Comb-Branched Copolymers as Pigment Dispersants

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Pigmented coating compositions are used in a wide variety of applications including paints, inks, and inkjet inks. For inkjet inks in particular, the trend towards both inorganic and organic pigments has been driven by the need to produce more lightfast images with improved durability and water resistance. A challenge with using pigments is achieving stable, fine-particle pigment dispersions. This is especially the case for aqueous pigment dispersions. Thus, it is desirable that a dispersant is optimized to effectively wet, disperse and stabilize pigments during the milling process. These objectives can be met by using a dispersant comprising an acrylic/polyether comb-branched polymer. We will review the sensitivities of pigment dispersion processing and properties to variations in the composition and molecular distributions of comb-branched copolymeric dispersants. The influence of these variations on end use performance for several applications will be reviewed. lnkjet ink performance, in particular, will be emphasized.
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Document Type: Research Article

Publication date: 2003-01-01

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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.

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