Nonionic synthetic associative thickeners (NSATs) enjoy widespread use in waterborne architectural coatings. Traditional product offerings focused on addressing either high or low shear rheology requirements. The latest generation of rheology modifiers has been challenged to address a broader range of customer requirements including environmentally friendly products which offer broader rheological performance, as well as product viscosity constraints. In addition paint manufacturers are increasingly demanding rheology modifier suppliers to address other properties not traditionally provided by current products. Manufacturers of NSATs are challenged to develop innovative associative mechanisms to deliver robust performance in coating compositions containing surfactants, dispersants, and other additives which can disrupt conventional associative thickening. VOC restrictions further complicate rheological product development, especially in the context of formulating eco-friendly premium architectural waterborne paints.
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