What to do if the coating is flowery and has shrinkage cavities during recoating? This type of leveling agent provides a solution

1. Definition and function of leveling agents that do not affect recoating

Leveling agents that do not affect recoating are special coating additives designed to improve the leveling performance of coatings during the coating process without having a negative impact on subsequent recoating operations. Its core role is reflected in the following aspects:

Leveling optimization: Reduce the surface tension of the coating so that the coating can automatically form a uniform and flat coating film after coating, reducing surface defects such as orange peel and shrinkage cavities.

Recoating compatibility: Ensure that the new coating can adhere well to the old coating during subsequent recoating, without problems such as delamination and peeling, and ensure the overall coating quality and appearance after recoating.

2. Application scenarios

Automotive repair paint field

Scenario description: Cars will inevitably have scratches, collisions, etc. in daily use, and local repair paint operations are required. After repair, the entire car body may also need to be re-sprayed or partially re-coated to maintain the consistency of appearance.

Application value: The use of leveling agents that do not affect recoating can ensure the flatness of the coating at the repaired part during the first touch-up, and create good conditions for possible subsequent recoating operations. For example, when the owner wants to change the body color or renovate the entire car after a period of time, the new coating at the repaired part can be closely combined with the surrounding original coating, and there will be no recoating failure caused by leveling agent residue or property problems.

Building exterior wall paint renovation

Scenario description: The exterior wall of the building is exposed to the natural environment for a long time, and is exposed to wind, sun, rain, etc., and the paint will gradually age and fade. In order to maintain the beauty of the building and protect the wall, it is necessary to renovate the exterior wall paint regularly.

Application value: Adding a leveling agent that does not affect recoating during the initial coating of the exterior wall paint can make the coating surface flat and smooth, and improve the weather resistance and decorativeness of the coating. In the subsequent renovation process, the new coating can be smoothly attached to the old coating, avoiding problems such as sagging and bubbling, and ensuring the appearance quality of the renovated exterior wall.

Furniture manufacturing and renovation industry

Scenario description: Furniture needs to be painted multiple times during the production process to achieve the ideal appearance effect. At the same time, after using it for a period of time, consumers may want to renovate the furniture and change its color or style.

Application value: Using a non-recoating leveling agent during the furniture painting process can ensure the coating quality of each coating and make the furniture surface smooth and delicate. When renovating furniture, the new coating can be well covered on the old coating, and the coating adhesion will not decrease or other quality problems will occur due to the influence of the leveling agent, thus extending the service life of the furniture.

3. Application advantages

Improve coating efficiency

Explanation: Since the non-recoating leveling agent can improve the leveling performance of the coating and reduce the rework operation due to surface defects during the coating process, the coating time is shortened and the production efficiency is improved. For example, on an automobile production line, the use of this leveling agent can shorten the coating time of each vehicle by a certain percentage, greatly improving the output of the production line.

Guarantee the coating quality

Explanation: It not only guarantees the coating quality of the initial coating, but also ensures the compatibility and adhesion between the recoated coating and the old coating, so that the entire coating system has good physical and chemical properties. For example, after the building exterior wall coating uses the non-affecting recoating leveling agent, the coating's water resistance, stain resistance and other properties are improved, which can effectively protect the wall.

Reduce costs

Explanation: Reduce the waste of paint and rework costs caused by coating defects, while extending the service life of the coating and reducing long-term maintenance costs. In the furniture manufacturing industry, the use of this leveling agent can reduce the defective rate, improve the utilization rate of raw materials, and thus reduce production costs.

4. Application precautions

Addition amount control

Explanation: Strictly control the addition amount of the non-affecting recoating leveling agent in accordance with the requirements of the product manual. If the addition amount is too small, the expected leveling effect may not be achieved; if the addition amount is too large, it may affect the coating's drying speed, hardness and other properties, and even have an adverse effect on recoating. For example, in a specific coating, if the addition amount exceeds 5% of the specified value, the coating drying time may be extended by more than double.

Compatibility with other additives

Description: Other types of additives are usually added to the coating formula, such as defoamers, dispersants, etc. When using a non-recoating leveling agent, it is necessary to consider its compatibility with other additives to avoid chemical reactions or mutual interference that affect the overall performance of the coating. The compatibility between different additives can be verified by a small sample test.

Construction environment and process

Description: The temperature, humidity and coating process (such as spraying pressure, spray gun distance, etc.) of the construction environment will affect the effect of the non-recoating leveling agent. In a high temperature and high humidity environment, the drying speed of the coating may be accelerated, affecting the function of the leveling agent; and an unreasonable coating process may result in uneven coating thickness and fail to give full play to the performance of the leveling agent. Therefore, it is necessary to adjust the construction environment and process parameters according to the actual situation.

5. Development trend

Environmentally friendly product development

Trend analysis: With the continuous improvement of environmental awareness, the market demand for environmentally friendly non-recoating leveling agents is growing. In the future, R&D personnel will focus on developing non-toxic and harmless leveling agent products with low volatile organic compound (VOC) content to meet increasingly stringent environmental regulations and consumers' requirements for health and environmental protection.

High-performance development

Trend analysis: In order to adapt to the higher requirements of coating performance in different industries, non-recoating leveling agents will develop in the direction of high performance. For example, develop leveling agent products with better leveling effect, higher recoating compatibility, and the ability to give coatings special functions (such as self-cleaning, antibacterial, etc.).

Intelligent application

Trend analysis: With the help of advanced sensor technology and data analysis methods, the intelligent application of non-recoating leveling agents can be realized. By real-time monitoring of various parameters in the coating process, the amount of leveling agent added and the coating process are automatically adjusted to achieve the best coating effect, improve production efficiency and product quality.

In summary

Non-recoating leveling agents have broad application prospects and important application value in multiple industries. By reasonably applying the leveling agent and paying attention to relevant matters, its advantages can be fully utilized to improve coating quality and efficiency and reduce costs. At the same time, with the continuous advancement of technology, the recoating leveling agent will also develop in the direction of environmental protection, high performance and intelligence.