What type of polyurethane is primarily used for durability?

Aromatic polyurethane is primarily used for durability due to its chemical structure, which includes aromatic rings that contribute to greater resistance to environmental degradation, UV light, and chemical attacks. This type of polyurethane is known for its high strength and robust physical properties, making it suitable for applications where long-lasting performance is required, such as in coatings, adhesives, and elastomers.

While aliphatic polyurethane also offers good durability and is often favored for its UV stability and color retention, aromatic polyurethane typically excels in applications demanding higher strength and resistance properties. Thermal and resin-based polyurethanes do not specifically address the durability aspect as effectively as the aromatic variant, focusing instead on other performance characteristics or specific applications.