Isocyanates are frequently used in the coatings world. We will discuss here their synthesis, we will see examples of commercial isocyanates, we will see their reactions and we will discuss adducts of isocyanates. Waterborne- and blocked isocyanates are discussed as well. Finally we will see the dangers of isocyanates, their practical properties and applications (38 minutes, 50 slides, 15 pages textbook).