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Nano-Silica Dispersions for Adhesives

Tiny particles, big performance

Nano-silica dispersions enhance polychloroprene adhesive performance

Polychloroprene adhesives are cost-effective solutions in many applications where high initial bond strength is needed. Sometimes, however, greater wet bonding strength or heat resistance is needed. An economical solution is to boost the performance of waterborne polychloroprene adhesives with the addition of nano-silica dispersions from Covestro.

Our Dispercoll® S nano-silica dispersions are waterborne, anionic colloidal dispersions of amorphous silicon dioxide nanoparticles. Their particle sizes range from 5 to 100 nm.

Adding Dispercoll® S dispersions to waterborne adhesive formulations based on Dispercoll® C polychloroprene dispersions achieve the following property improvements:

  • Higher initial wet bond strength
  • Higher final bond strength
  • Greater heat resistance
  • Adjustment of viscosity over a wide range

Waterborne Dispercoll® C resins formulated with Dispercoll® S nano-silica dispersions are ideal substitutes for solventborne polychloroprene raw materials.

Dispercoll® S  nano-silica dispersions are just one example of how we are working to provide economical products with minimal environmental footprints and outstanding performance.

Our scientists continue to explore and develop new adhesive raw material technologies that provide bonding and laminating properties needed for many demanding applications.

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