Interesting facts about superglue

Superglue was invented by accident. When Dr. Gerry Coover tried to invent plastic in 1942, which would be used to make "fly" - scopes for machine guns, he worked with the chemical synacryl, and one day he found that, on contact with moisture, the component glued together all the tools with which Coover made their experiences. Nevertheless, the product was patented only in 1955, and in 1958 superglue went on sale for the first time, "blowing up" the market.

Adhesives based on cyanoacrylates can easily withstand loads of 150 kg / cm 2, and temperatures up to 70-80 C.

Superglue sets from moisture in the air, not from the air itself. It is problematic to use it in the desert. The setting of superglue is based on the polymerization reaction of cyanoacrylate, of which it consists. This reaction is catalyzed by the smallest particles of water in the air or on the surface of the glued objects.

But on contact with cellulose, cyanoacrylate polymerizes so vigorously that it gets very hot and can catch fire. Don't believe me? Then try applying superglue to a regular sponge, after a few seconds of interaction, smoke will go out.

Sometimes this trick is used for extracting fire in extreme conditions (fumes and vapors released during this reaction are not recommended to inhale due to possible toxicity). It is precisely because of its ability to react with cellulose that superglue is not suitable for gluing cotton or wool products (cyanoacrylate reacts with wool in a similar way). Due to safety regulations, workers handling large volumes of cyanoacrylate are prohibited from wearing cotton gloves.

If cyanoacrylate is heated, its vapors settle on surrounding objects and, in contact with traces of fat, polymerize. One of the ways to search for fingerprints is based on this - cyanoacrylate "reveals" them in the form of white patterns. If it is necessary to obtain prints of a different color, dyes are added to the heated cyanoacrylate.

An unusual use of superglue was found by American doctors during the Vietnam War, when the wounds of soldiers injured in battle were literally glued together, thereby effectively stopping bleeding and preventing many negative medical problems. Many soldiers' lives were saved in this way.

Super glue stain can be cleaned with acetone or nail polish remover. It is necessary to abundantly moisten the place of pollution with liquid and after an hour rub the surface with a cotton cloth or a soft brush, for example, a toothbrush.