Contents Introduction Fundamentals of Polyurethane Rigid Foam Formation 2.1. Polyurethane Reaction Mechanism 2.2. Blowing Agents and Their Role 2.3. Surfactants and Foam Stabilization Catalyst Types and Their Mechanisms of Action 3.1. Amine Catalysts 3.1.1. Tertiary Amine Catalysts 3.1.2. Blown Amine Catalysts 3.1.3. Reactive Amine Catalysts 3.2. Organometallic Catalysts 3.2.1. Tin Catalysts 3.2.2. Zinc Catalysts 3.2.3....