Thickeners are not only responsible for the viscosity of a paint, but they also have a substantial influence on the smoothness and the thickness of the application layer, the leveling of the paint and the spatter resistance by brushing or rolling. Obviously, these factors result in very stringent demands being placed on the paint’s thickener. Agrana has succeeded in developing new starch derivatives to be introduced as thickeners for emulsion paints and emulsion-based plaster that not only satisfy these exacting demands, but actually contribute additional improvements.In emulsion paints, celluloses are commonly used as thickeners. In particular, low and medium viscosity celluloses are primarily used in quality paints and have dominated the market for decades. However, the need to control rheology over a wide range of shear rates
has resulted in the development of markedly higher viscosity celluloses. These now permit the meaningful employment of starch derivatives, where combinations of starches and high viscosity celluloses are being used.
posted by Johan Bieleman, Consulting/ Training/ Education at Delden Advice
Interesting technology for making creamy paints, at low costs. Curious to learn the effect vs HEC on rheology curve as well as final paint properties, such as flow/ levelling, scrub resistance
SpecialChem4Coatings Members Reactions
