for catalyzed lacquers, baked enamels and primers, cross-linker for saturated polyesters, alkyds and acrylic baked enamels.
Both urea- and melamine-formaldehyde resins are classified as amino resins which are dissolved in suitable alcohol-type solvents. Amino resins are not used alone. They are used in baking enamels in combination with alkyds to increase hardness and improve color as well as resistance to heat, soap, water and other chemicals.
Urea-formaldehyde (UF) resins can produce cured coatings at room temperature if a suitable catalyst is included in the coating formulation.
Melamine formaldehyde (MF) resins are superior to urea-formaldehyde resins in terms of: 1) cure, 2) hardness 3) chemical resistance and 4) durability. Superior chemical resistance and durability are the prime reasons for the preferred use of melamine-formaldehyde resins in appliance as well as in automotive finishes.