In the application of coating leveling agents, the following key issues need to be noted:
1. Selection of leveling agents
Type matching:
Different types of coatings require different types of leveling agents. For example, the leveling agents used in
solvent-based coatings and water-based coatings are often different. Therefore, when selecting a leveling agent,
it is necessary to match it according to the type and functional requirements of the coating.
Compatibility test:
The compatibility between the leveling agent and the coating is the key to ensuring the leveling effect. Before use,
the compatibility of the selected leveling agent with the coating should be tested through rigorous tests to avoid
undesirable phenomena such as stratification, precipitation or shrinkage.
2. Control of the amount of addition
Appropriate addition:
The amount of leveling agent added should be controlled within a certain range. Excessive addition may cause
shrinkage, sagging and other problems on the coating surface, while too little addition will not achieve the leveling
effect. Usually, the amount of addition will be determined according to the viscosity and leveling requirements of the coating.
Follow the instructions:
When using a leveling agent, follow the instructions for use of the reagent and adjust and determine the optimal
amount of addition based on the actual test results.
3. Influence of construction conditions
Coating method:
The leveling performance of the coating is affected by the coating method. When choosing a coating method, you
should consider how to maximize the effect of the leveling agent. Common coating methods include brushing, roller coating
and spraying, which can be selected according to actual conditions.
Environmental conditions:
Environmental conditions during construction, such as temperature and humidity, will also affect the effect of the leveling agent.
For example, when constructing in a high temperature and high humidity environment, you may need to choose a leveling agent
with anti-white fog performance.
4. Stirring and dispersion
Full stirring:
When using a leveling agent, make sure to stir the paint thoroughly so that the leveling agent can be evenly dispersed in the paint.
The stirring time should be determined according to the characteristics of the leveling agent, but generally should not exceed 10 minutes.
Avoid agglomeration:
The agglomeration of the leveling agent in the paint will affect its leveling effect. Therefore, during the stirring process, make sure
that the leveling agent can be completely dissolved or dispersed in the paint.
5. Recoatability and anti-shrinkage properties
Recoatability considerations:
When selecting a leveling agent, you need to consider its impact on the recoatability of the paint. Some leveling agents may reduce
the recoatability of the coating, so appropriate adjustments need to be made in the formula.
Anti-shrinkage:
Shrinkage is one of the common problems in coating construction. Selecting a suitable leveling agent and controlling its addition amount
can effectively reduce the occurrence of shrinkage.
In summary
the application of coating leveling agents requires attention to the selection of leveling agents, the control of addition amount,
the influence of construction conditions, stirring and dispersion, as well as recoatability and anti-shrinkage. By reasonably selecting and using
leveling agents, the leveling performance and coating quality of the coating can be significantly improved.
