ABSTRACT
Polyurethanes are a class of polymers produced by combining a large number of simpler molecules called monomers. Their versatility has allowed their use in the automotive industry, architecture, aerospace, office machinery, agriculture, the marine industry,
mining, packaging, footwear, and medical devices. Typically, the monomers used to form polyurethanes are isocyanates and polyols (Figure 25.1). Polyurethanes are used in various applications1,2 as bulk plastics, elastomers, fibers, foams (rigid to flexible), surface coatings, adhesives, and sealants (Figure 25.2).1
