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Cyanoacrylate

The main ingredient in Super glue is Cyanoacrylate (C5H5NO2, for you chemistry buffs). Cyanoacrylate is an acrylic resin that cures (forms its strongest bond) almost instantly. The only trigger it requires is the hydroxyl ions in water, which is convenient since virtually any object you might wish to glue will have at least trace amounts of water on its surface. Air also contains water in the form of Cyanoacrylate molecules start linking up when they come into contact with water, and they whip around in chains to form a durable plastic mesh. The glue thickens and hardens until the thrashing molecular strands can no longer move.

 

Super glue undergoes a process called anionic polymerization. The chemical process of polymerization produces a certain amount of heat. If a large enough amount of super glue makes contact with your skin, it can actually cause burns.

Additives are used to form stronger bonds to rubbers, metals, and other surfaces, the rubber toughened formula is great for projects requiring toughness and impact resistance. It is an excellent formula to use when bonding plastic and rubber together and also works well on aluminum and other metal surfaces. Standard Cyanoacrylate adhesive does not bond well to smooth glass, although there are special formulations which are more suitable. They all are single component solvent free materials manufactured in a wide variety of viscosities and setting times to satisfy specific bonding applications.

Ethyl Grades are for use in demanding applications where very fast cure speeds are required. Substrates such a wood, plastics, metal, rubber, or other materials are bonded quickly. These products are less dependent on surface moisture for achieving cure speed than most standard grades of Cyanoacrylate.

Methyl Grades products are used to bond metal to itself or other substrates

Super glue definitely deserves its name -- a 1-square-inch bond can hold more than a ton.

 


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