The fluorocarbon coating for curtain wall material coating is an organic coating based on fluorocarbon resin with metal particles or mica crystal as the toner, and its PVDF (polyvinylidene fluoride) content is above 70% (resin Mass ratio). The chemical structure of the fluorocarbon binder is a combination of fluorine/carbon chemical bonds, which is considered to be the most stable and strong. Under normal circumstances, it has the following excellent performance:
1. Weatherability :
It has the ability to withstand harsh weather and ultraviolet light, thus maintaining color and luster for a long time;
2. Corrosion resistance:
It is resistant to acid and liquid alkali and is free from air pollution and acid rain. It has low permeability of oxygen, moisture and corrosive particles and can withstand the harsh environmental surface without corrosion for a long time.
3. Mechanical properties： excellent impact resistance, wear resistance and excellent film flexibility.
In paints named after KYNAR500 @, the required [email protected] weight ratio is ≥70%. The reason is that when the resin content is 70%, the properties of PVDF, especially weather resistance and durability, can reach higher requirements, while above 70%, the performance impact is not large, basically 70%. In the same performance state, and the primer content of 30% and 70% of PVDF matched, the best performance, scientific experiments show that PVDF <70% of the coating, its performance is significantly reduced.
KYNAR500 @ resin content is less than 70%, the name of KYNAR500 @ paint is not allowed.
Commonly used fluorocarbon coated curtain wall materials include fluorocarbon sprayed aluminum profiles, fluorocarbon sprayed aluminum veneers, fluorocarbon roll coated aluminum veneers, and fluorocarbon roll coated surface treated aluminum-plastic composite panels. At present, PVF perfluorocarbon coated aluminum veneers are also sold in the domestic market.