Sweating

Sweating out refers to the phenomenon in which plasticizers or other components of a coating migrate from the inner structure of the coating to the surface. This process can take place over a long period of time and is often accelerated by external influences such as temperature changes, moisture or mechanical stress. Plasticizers, which help to ensure the flexibility and elasticity of the coating, are most frequently affected by sweating.

If these components reach the surface, various problems can occur. These include sticky or greasy surfaces that affect the appearance of the coating. In addition, sweating can lead to loss of gloss, discoloration or a deterioration of the mechanical properties of the coating, as the migration of plasticizers changes the original physical properties of the material.

Sweating out is particularly problematic in applications where aesthetic quality and surface finish play a decisive role, such as in the automotive industry or for decorative coatings. To prevent oozing, special formulations and additives can be used to reduce the migration of plasticizers and other components. Control of the ambient temperature and careful selection of the materials used can also help to minimize this problem.

Overall, sweating is a challenge that can affect both the functionality and longevity of coatings and therefore requires careful monitoring and appropriate measures during the formulation and application of coatings.