uretaanin

Urethane is a chemical compound and a functional group in organic chemistry. It is characterized by the presence of a carbamate functional group, which has the general structure R1-O-C(=O)-N-R2R3. This group is formed by the reaction of an alcohol with an isocyanate. Urethanes are often associated with the polymers known as polyurethanes, which are formed through the polymerization of diisocyanates with diols. These polymers are versatile and find applications in a wide range of products, including foams, coatings, adhesives, and elastomers. The properties of polyurethanes can be significantly modified by altering the choice of isocyanates and polyols used in their synthesis, leading to materials with varying degrees of flexibility, hardness, and durability. The urethane linkage itself is a stable ester-like bond that contributes to the strength and resilience of polyurethane materials. While the term "urethane" can refer to the functional group, it is commonly used as a shorthand for polyurethane polymers.