Surfactants as Surface Modifiers
Surfactants are mainly known as additives for improving dispersion properties of
pigments and extenders -they are commonly called
dispersants. However they also can be effective additives for resolving surface
problems like leveling
and substrate wetting.
Hydrocarbon surfactants impact the leveling and wetting properties in coatings formulations
which are key point to avoid
paint surface defects. The surface tension reducing part of these additives
consists primarily of hydrogen and carbon.
Hydrocarbon surfactants are generally less expensive than fluorocarbon surfactants,
and hydrocarbon surfactants are available with a variety of functional groups. It
makes sense economically to try them first in the coating formulation.