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How Does POWERBOND Work?

 

Acidic Stabiliser (red) keeps Cyanoacrylate liquid

 

The cyanoacrylate cure mechanism is unique and does not require heating, the addition of avtivator or the evaporation of solvents. Cyanoacrylate adhesives are stabilised by an acidic stabiliser which inhibits polymerisation of the adhesive molecules and keeps the product in a liquid state in the container.

When the adhesive is applied to the surface to be bonded, the stabiliser is neutralised by the alkalinity of the substrate or by partly ionised molecules of water. Microscopic amounts of moisture are normally present on all surfaces exposed to the atmosphere.

Water particles (dark blue) neutralise the Stabiliser

 

Molecues join and Cyanoacrylate cures Polymerisation is initiated and the cyanoacrylate adhesive changes from a liquid to a load bearing structural polymer. During the polymerisation process, chains of adhesive molecules build up along the bond line. Adhesion is achieved by attraction with molecules of the material to be bonded. These chains link together in a complex structure that produces a bond between the two surfaces.