Surface-insensitive Cyanoacrylates

The new range of surface-insensitive cyanoacrylates provides ultrafast cures independent of gap. In addition, these cyanoacrylates will rapidly bond acidic and low-energy surfaces. The fast cure also minimizes the occurrence of frosting and fogging. Table 6 shows a comparison of these new surface-insensitive materials compared to a standard ethyl-grade cyanoacrylate. These products are also suited to bonding various wood substrates and porous surfaces without the use of activators. 

Similarly because these surface insensitive cyanoacrylates are good general purpose bonders, they are particularly suited to the maintenance sector where the condition of the substrate is not well defined. 

With the incorporation of the new surface-insensitive additives which allow rapid curing on acidic and porous substrates such as wood and paper, and the marketing of these versatile adhesives in the consumer sector, the number of applications where cyanoacrylates are used is limited only by the ingenuity of the user. The new toughened adhesives with improved heat and humidity resistance and dynamic performance are already encroaching into areas where epoxies were once the only choice. Versatility... 

Surface Insensitive Cyanoacrylates (For Acidic and Porous Substrates)... 

For these acidic substrates, a surface insensitive grade of cyanoacrylate must be used to ensure proper cure. The surface insensitive grades include special additives that can convert surface contamination into an activating species towards cyanoacrylates and then allow the adhesive to continue curing in the usual way. Such surface insensitive cyanoacrylates are good general-purpose bonders - making them particularly suited to applications where the condition of the substrate is not well defined. 

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