Due to their complex structure, coatings have a complex flow behaviour that cannot be described by one viscosity value. The viscosity depends greatly on the flow velocity.
A rheological test for determining the sagging behaviour of spray coatings was presented using two water-based coatings as an example. The step test was used to simulate the decomposition and regeneration of the coating structure.
Click on the link above to download the application report from Anton Paar to learn about the interesting set-up and results of this three-interval step test.
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