Powder coating
Discover the benefits of powder coating – from efficiency to improved sustainability – and Covestro’s powder-coating resins.
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Pasquick®
Our polyaspartic coating technology cures up to eight times faster than other systems and offers easy application for professional users with standard spraying equipment.
In the world of high-performance coatings, adhesives, sealants, and elastomers (CASE), few raw materials are as indispensable, or as versatile as isocyanates. Whether you’re new to formulation or a seasoned chemist engineering cutting-edge polyurethane systems, understanding isocyanates is essential to maximizing durability, aesthetics, and performance.
What Are Isocyanates?
Isocyanates are reactive chemical compounds containing one or more isocyanate groups (-NCO). They are most commonly used as crosslinkers and curing agents in polyurethane, polyurea, and epoxy formulations. When combined with polyols, amines, or water, isocyanates undergo an exothermic reaction that creates robust polymeric networks. The result: coatings and materials with outstanding mechanical strength, chemical resistance, and weatherability.
Two Primary Classes of Isocyanates:
1. Aromatic Isocyanates – Fast-reacting, ideal for applications where exposure to UV light is limited. They are often used in industrial flooring, adhesives, and moisture-cured systems.
2. Aliphatic Isocyanates – Slower-reacting, UV-stable, and ideal for clearcoats, topcoats, and exterior applications where gloss retention and color stability are essential.s
Why Formulators Choose Isocyanates
Isocyanates offer formulators a flexible toolkit. Depending on the system, they can be fine-tuned for pot life, cure speed, hardness, chemical resistance, flexibility, and film build. Their compatibility with a broad range of resins, solvents, and additives makes them ideal for:
• Epoxy hybrid systems – enhancing durability and toughness
• 2K polyurethane topcoats – boosting weather resistance and gloss
• Moisture-cured systems – for self-leveling floors or wood coatings
• Polyurea elastomers – fast-set, high-flexibility systems
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