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Methods for Developing High-Shear or ICI Viscosity Through the Use of Novel, Hyper-Efficient Nonionic Associative Thickeners

SpecialChem / Jan 21, 2009

Through the adoption of increasingly more stringent environmental regulations, the coatings industry has been moving away from traditional oil-based paint systems and toward water-based systems that contain lower levels of VOCs. From an applications perspective, traditional oil-based alkyd systems produce excellent brush properties primarily due to well-developed high-shear viscosity, which in turn results in high film build, which allows for improved coverage, flow and leveling. Alkyd resins commonly used in these systems mimic, to some degree, the rheological properties of common oils, such as linseed, and many silicone fluids. Most of the resulting paint systems produced using these resins inherently produce high high-shear viscosities with near-Newtonian rheological profiles. If one were to take a closer look at only the rheological properties associated with these early systems, obvious deficiencies would be evident, most noticeably the application properties, which were severely lacking when compared to their alkyd counterparts

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