What will happen if the dosage of the leveling agent is excessive?
An excessive dosage of the leveling agent will have multiple negative impacts on the coating, mainly including the following aspects:

1. Decline in Coating Performance
   Reduction in coating hardness and wear resistance: An excessive amount of the leveling agent will reduce the solid content of the coating, resulting in a decrease in the hardness and wear resistance of the coating.
   Poorer coating adhesion: Too much leveling agent may weaken the adhesion between the coating and the substrate.
   Thinning and sagging of the coating: An excessive amount of the leveling agent will make the coating too thin, and sagging is likely to occur, affecting the appearance and durability of the coating.
2. Increase in Surface Defects
   Shrinkage holes and Benard cells: An excessive amount of the leveling agent may lead to defects such as shrinkage holes and Benard cells on the coating surface.
   Hazing and stable foaming: When certain types of leveling agents (such as polyether types) are used in excessive amounts, they may cause hazing on the coating surface or generate stable bubbles.
3. Decrease in Coating Stability
   An excessive amount of the leveling agent may damage the stability of the coating, leading to problems such as coating delamination and precipitation, which increases the difficulty of construction.
4. Increase in Cost and Waste
   The excessive use of the leveling agent not only increases the production cost but also may lead to resource waste.
5. Increase in Construction Difficulty
   Too much leveling agent may make the coating overly active, increasing the difficulty of control during the construction process. For example, the coating thickness may be uneven, and the construction time may be prolonged.
6. Impact on Defoaming Performance
   The use of a large amount of the leveling agent may cause excessive foaming in the coating, increasing the dosage of the defoaming agent and the difficulty of defoaming.

Conclusion
The dosage of the leveling agent is not the more, the better. Excessive use may have negative impacts on the coating performance, surface quality, coating stability, and construction effect. Therefore, the addition amount of the leveling agent needs to be precisely controlled according to the coating system and specific application requirements. Generally, the recommended addition amount is 0.1% to 1% of the total amount of the coating. In practical applications, it is recommended to determine the optimal addition amount through small-scale tests to ensure the coating performance and construction effect.
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