Introduction Fundamentals of Polyurethane Flexible Foam Chemistry 2.1 Isocyanate-Polyol Reaction 2.2 Blowing Reaction 2.3 Catalyst Role in Foam Formation Classification of Polyurethane Flexible Foam Catalysts 3.1 Amine Catalysts 3.1.1 Tertiary Amine Catalysts 3.1.2 Reactive Amine Catalysts 3.1.3 Blocked Amine Catalysts 3.2 Metal Catalysts 3.2.1 Tin Catalysts 3.2.2 Other Metal Catalysts 3.3 Hybrid Catalysts Mechanism of...