Urea-formaldehyde resin is mainly used to prepare amino alkyd baking varnish with alkyd resin to improve the hardness and dryness of the paint film. It can be combined with non-drying alkyd resin to make acid-cured amino paint for wood furniture finishing. However, the weather resistance, water resistance and gloss retention are slightly worse. It can be used to formulate primers and interior paints with different properties based on epoxy resin and alkyd resin. Key features include:
1. The price is cheap and the raw materials are sufficient.
2. The molecular structure of urea-formaldehyde resin contains polar oxygen atoms, so it has good adhesion to the surface. It can be used in primers and intermediate coatings to improve the bonding force between top coats.
3. Since it can be cured at room temperature when using an acidic catalyst, it can be used in two-component wood coatings.
4. The paint film cured by urea-formaldehyde resin has good flexibility.
5. Urea-formaldehyde resin has high viscosity, high acid value and poor storage stability.
What is the danger of urea-formaldehyde resin?
Because urea-formaldehyde resin has disadvantages such as poor initial viscosity, large shrinkage, high brittleness, water resistance, easy aging, formaldehyde release and formaldehyde pollution from curing, and damage to health, it must be modified to improve performance and expand applications.
