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The Adhesion Promoter Used for paint to promote adhesion

The adhesion is the resistance of the coating to being removed from the substrate. The adhesion promoter for paint is an additive to promote adhesion of the film to the substrate. It has an affinity for the substrate and the applied coating and forms a permanent and strong bonding.

Without the adhesion promoter, the properties of the applied coating may not be sufficient to meet the final performance requirements.

The adhesion and adhesive strength is the combination of various phenomena between the paint material and the substrate, such as:

  • Mechanical adhesion
  • Physical mechanisms at a molecular level at the interface (dipole and electrical charges layer)
  • Thermodynamic mechanisms at the interface (interface energy)
  • Chemical mechanisms at the interface (chemical bonds)