Which of the following coating types does NOT use coalescence curing?

Coalescence curing is a process typically associated with coatings that contain water-based latex or emulsion systems, where the film-forming agents coalesce into a continuous film upon drying. This process primarily occurs in coatings that utilize acrylics or latexes, where the water evaporates and allows the polymer particles to merge and form a solid layer.

Phenolic coatings, on the other hand, do not rely on coalescence curing. Instead, they generally cure through chemical reactions involving heat and catalysts, resulting in a thermoset material that hardens not by coalescing but through cross-linking reactions. This diverges from the curing mechanisms of the other coating types listed, which rely heavily on coalescing for film formation.

Understanding this difference highlights why phenolic coatings are not included in the category of coatings using coalescence curing, as their curing mechanism is fundamentally different from those of acrylic and latex-based coatings. The other options are inherently linked to the coalescence process that is essential for their film-forming properties.