What is polyurethane?

It refers to a group of chemicals that are made from the reaction of polyols and isocyanates as the main constituents. Polyurethanes were first discovered by Otto Bayer in Germany in 1937, and since then these materials with special properties have greatly improved in They had all kinds of industries in the world. The first polyurethanes were produced by the reaction of diisocyanate. Alithans are compounds that have a urethane bond in their structure. Polyurethane (PU) is the general name for polymers that have a urethane bond. The urethane bond is formed by an additive reaction between an isocyanate group and an active hydrogen compound such as a hydroxyl group. Isocyanate groups are highly reactive and therefore their reaction does not require an increase in temperature. Polyurethanes can be produced in various forms such as foam products, films, elastomers, powders, liquids and emulsions.

Disocyanate

Brown liquid is a group of organic compounds with the general formula -N = C = O. Compounds that contain two functional groups of isocyanates are known as diisocyanates. These substances react with polyols to form a group of polymeric materials called poly They make urethane
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Polyol

Almost yellow liquids are types of alcohols that contain several groups of hydroxyl. These compounds are used in polymer chemistry and food science. Maltitol, sorbitol and erythritol are among these compounds.