Polyurethane intermediate coating is an important type of coating, mainly used for intermediate coating to enhance the brightness and fullness of the topcoat, and protect steel structures or concrete in corrosive environments. Polyurethane coating has the following main characteristics:
Fast drying:
Polyurethane coatings can dry quickly under appropriate conditions, reducing construction waiting time.
01
Good filling performance:
It can effectively fill surface defects and improve the flatness of the coating.
02
Strong adhesion:
Strong adhesion to primer and topcoat, not easy to peel off.
03
Good mechanical performance:
It has high hardness and impact resistance, and can withstand certain physical impacts.
04
Wide compatibility:
Can be used with various primers and topcoats, suitable for different types of painting needs.
05
Construction technology and precautions
Preparation before construction:
Ensure that the construction environment is dry and clean, and avoid dust, moisture, and other factors that may affect the coating effect.
01
Mixing and Mixing:
Mix the paint and curing agent evenly in a ratio of 4:1 (weight ratio), and use up within 8 hours.
02
Construction method:
Air spraying, rolling or brushing can be used, and appropriate diluents (such as XLZ polyester diluent) can be used to adjust the viscosity.
03
Drying conditions:
After construction, the relative humidity should not exceed 85% to avoid high humidity environments affecting the curing of the paint film.
04
Safety measures:
During the construction process, protective equipment must be worn to avoid contact with skin and eyes, ensure good ventilation, and stay away from sources of fire and heat.
Through the above introduction, we can better understand the characteristics, uses, and construction methods of polyurethane painting, ensuring its effectiveness and safety in different applications.
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