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Legislation aimed at reducing air pollution through the emission of volatile organic compounds (VOCs) has significantly impacted many industries. For several years, Eastman cellulose esters have found widespread use in coating applications to improve performance and appearance.
Many formulators benefit from the fact that Eastman cellulose esters are naturally derived, a property that allows incorporating bio content into coatings. However, some cellulose ester grades with high molecular weights cause an increase in viscosity. This requires an offset by increasing the amount of solvent, which results in a level of VOCs higher than the legislated maximum values.
Eastman cellulose esters are widely used in coating, ink, and adhesive applications as either binders or additives that provide the following key benefits:
Eastman has developed a new additive specifically designed to provide the same benefits as cellulose ester coating additives but with the added advantage of lower viscosity. Like cellulose esters, Solus™ 2100 is also a naturally derived, low–molecular weight additive that is soluble in a wide variety of organic solvents. The combination of the high solubility and lower viscosity that Solus™ 2100 provides in formulations, however, can further reduce VOCs by requiring less solvent to maintain an adequate viscosity for application. A comparison between Eastman's CAB-551-0.01 additive versus Solus™ 2100 on viscosity is presented below.
Solus™ 2100 is also completely soluble in parachlorobenzotrifluoride (PCBTF), a VOC-exempt solvent. This enables it to be used to make low-VOC formulations.
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