Researchers synthesized a series of novel polyurethane polyols using cyclic carbonate/polyamine chemistry with varying hydroxyl content and molecular weights and evaluated them for thermosetting coating applications. An amino resin crosslinker in varying amounts was used in order to investigate the mechanical properties of the obtained coatings.
It was shown that the adhesion to the substrate was improved with higher urethane content in the backbone. Moreover, the results revealed that the flexibility of the backbone structure of the polyol and the amount of crosslinker used have a significant influence on the flexibility, impact resistance, and chemical resistance of cured thermoset coatings.
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