Polyurethane Coatings
Polyurethane coatings are known for their high-gloss finish and exceptional resistance to abrasion, making them a preferred choice for industrial painters. They are often applied as topcoats to keep surfaces smooth and free from scratches, as well as to protect underlying layers like epoxy intermediate coats and zinc-rich primers on structures such as nuclear plants, ships, and other environments exposed to harsh conditions.
There are two primary types of polyurethane coatings: aliphatic and aromatic.
- Aliphatic polyurethane coatings are ideal for outdoor use because they can withstand UV rays and maintain their color even after prolonged exposure to sunlight.
- Aromatic polyurethane coatings are best suited for equipment primarily underwater, as they can deteriorate and form a white film when exposed to sunlight and air.
It is important to note that polyurethane coatings contain hazardous chemicals, including isocyanates, toluene, phosgene, diamines, ozone-depleting substances, and halogenated flame retardants. Therefore, contractors must use appropriate protective gear when applying these coatings to ensure their safety.