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Paint - Ink - Coatings


Why use silanes in paint, ink, and coatings?

Silane monomers, in the form of organofunctional alkoxysilanes, have wide utility in coatings as adhesion promoters, pigment treatments, and crosslinking agents. Inorganic alkoxy functionality, coupled with a wide range of organofunctional groups, allows for covalent bonding between organic polymers and mineral surfaces (for example: pigments, fillers, and glass and metal substrates).  Alkoxysilane monomers (which are not, per se, silicones) are reasonably strong polar solvents and completely miscible with many organics.

The use of silane coatings has provided improvements in:

  • Abrasion resistance
  • Adhesion
  • Flow behavior
  • Pigment and filler dispersion
  • UV resistance
  • Water and chemical resistance

Adhesion Promoters for Coatings

Synthetic elastomeric and resinous coatings on hydrophilic siliceous and metallic surfaces are commonly subject to adhesion problems, especially after moisture exposure, water immersion or salt spray. Protection by a coating depends on its adherence to the substrate surface.  Silane coupling agents help assure good coating performance, either as an additive to the coating or in a separate primer.

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