What Are Cyanoacrylates?
Cyanoacrylates are a category of adhesives commonly used in instant adhesives. They include compounds like “methyl-2-cyanoacrylate” and “ethyl-2-cyanoacrylate.” These adhesives are typically colorless or pale yellow liquids with a characteristic odor and are insoluble in water but soluble in acetone.
Per the Hazardous Products Regulations (HPR), cyanoacrylates are classified under GHS as follows: Flammable liquids (Category 4), Skin irritation (Category 2), Eye irritation (Category 2A), and Specific target organ toxicity – single exposure (Category 3), affecting the respiratory system.
Uses of Cyanoacrylates
Cyanoacrylates are widely used for instant bonding in various applications, including joining plastics, rubber, and metals. They are utilized in both industrial and household settings. In medical applications, cyanoacrylates serve as wound-sealing agents.
These adhesives polymerize rapidly upon exposure to moisture adsorbed on surfaces or even in air, creating strong bonds quickly. While traditionally known for poor moisture and water resistance, recent advancements have led to the development of more water-resistant variants.