Low Molecular Weight Polyolefins (LMW Polyolefins) have been widely used in coatings, plastics and printing inks to provide low energy surface, abrasion/scratch resistance and release properties. Waxes, including LMW Polyolefins, are one of the key additives in digital printing such as electrophotographic printing, thermal and inkjet printing. Waxes provide release, lubrication and improve image sharpness. However, the dispersibility and stability of non-functionalized waxes with toner resins has long been a challenge. In this paper, a series of compositions consisting of polyester based resin, non-functional LMW Polyolefins (release agent/waxes) and specialty performance LMW Polyolefins have been prepared to better understand the dispersibility of LMW Polyolefins in the polyester toner resins. SEM, light microscope and DSC experimental results showed that several specialty performance LMW Polyolefins improved the dispersion of nonfunctional LMW Polyolefins (release wax) in the toner resins. Therefore, they can be used as compatibilizers for toner applications. They also have the potential to provide adhesion, abrasion resistance and improve gloss for electrophotographic printing, thermal and inkjet printings, as well as media coatings.
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