High temperatures during coating application can lead to which issue?

High temperatures during coating application can lead to solvent evaporating too fast. When the temperature rises, the volatility of the solvents in a coating increases, causing them to evaporate more rapidly. This can create several issues during the application process. For instance, if the solvent evaporates too quickly, it can hinder the proper flow and leveling of the coating, leading to unsightly finishes such as brush marks or uneven surfaces. Additionally, rapid evaporation can result in the formation of a skin on the surface before the coating has fully leveled, potentially trapping solvents and leading to defects.

Understanding the impact of temperature on the evaporation rate of solvents is crucial for coating application, as it not only affects the performance characteristics of the coating but also the workability and final appearance of the applied finish.