polyuretán

Polyurethane, often abbreviated as PU, is a versatile polymer consisting of organic units joined by carbamate (urethane) links. These polymers are formed by the reaction of a polyol with a diisocyanate or a polymeric isocyanate. The properties of polyurethanes can be widely varied depending on the specific reactants and additives used. This variability allows for the creation of a vast range of materials, from flexible foams to rigid plastics and tough elastomers.

Polyurethanes find applications in numerous industries. Flexible foams are commonly used in furniture cushioning, bedding, and automotive seating due to their comfort and durability. Rigid foams, on the other hand, are excellent insulators and are employed in building insulation, refrigerators, and freezers. Polyurethane elastomers are known for their abrasion resistance and flexibility, making them suitable for wheels, rollers, and seals. They are also used in coatings, adhesives, and sealants, providing protective layers and strong bonding capabilities. The chemical structure of polyurethane can be manipulated to achieve desired characteristics such as hardness, elasticity, chemical resistance, and flame retardancy, making it a highly adaptable material.