Does not affect recoating wetting agent: Smooth application across complex scenarios
Does not affect recoating wetting agent: Smooth application across complex scenarios
Does not affect recoating wetting agent application In actual use, its effect is affected by many factors, but the following factors usually do not directly affect the performance of its core functions:
1. Conventional physical state of the coating system
Viscosity range: Within the conventional construction viscosity (such as 50-200 cps), the wetting agent can adapt by adjusting the dosage without changing its molecular structure.
Solid content: Fluctuations in solid content (such as 30%-60%) have little effect on the wettability of the wetting agent, because its mechanism of action is to reduce surface tension rather than relying on solid content.
pH value: In the range of weak acid to weak alkaline (pH 5-9), the wetting agent has good stability and will not fail due to pH changes.
2. Conventional conditions of the construction environment
Temperature: At the conventional construction temperature of 5-35℃, the wetting agent can work stably. Excessive temperature (such as >40℃) may accelerate volatilization, but it can be solved by choosing a temperature-resistant wetting agent.
Humidity: When the humidity is 40%-70%, the wetting agent can effectively reduce the surface tension. Extreme humidity (such as <30% or >90%) needs to be adjusted with other additives (such as leveling agents), but it does not affect the function of the wetting agent itself.
Wind speed: Conventional wind speed (<3 m/s) has no significant effect on the wetting agent, but strong wind needs to be solved by shielding or adjusting construction parameters.
3. Conventional properties of substrates
Surface energy: When the surface energy of the substrate (such as metal 30-60 mN/m, plastic 20-40 mN/m) is within the conventional range, the wetting agent can effectively reduce the surface tension of the coating and promote wetting.
Roughness: For substrates with a roughness Ra of 0.5-5 μm, the wetting agent can enhance adhesion through penetration without changing its chemical structure.
Cleanliness: After conventional cleaning (such as removing oil and dust), the wetting agent can function normally. Severe pollution requires pretreatment, but it does not affect the performance of the wetting agent itself.
4. Conventional dosage of other additives in coatings
Leveling agent: When the dosage of leveling agent is 0.1%-1%, it works synergistically with the wetting agent and will not interfere with each other.
Defoamer: When the dosage of defoamer is 0.2%-0.5%, it has no significant effect on the wettability of the wetting agent.
Thickener: When the dosage of thickener is 0.5%-2%, it mainly affects the viscosity of the coating and does not affect the surface tension regulating effect of the wetting agent.
5. Conventional parameters of coating process
Coating method: Under conventional methods such as spraying, roller coating, and brushing, the wetting agent can be evenly distributed without special adjustment.
Coating thickness: When the single layer thickness is 20-100 μm, the wetting agent can effectively reduce the surface tension and promote interlayer bonding.
Drying method: Under conventional methods such as natural drying and baking curing, the wetting agent has good stability and will not fail due to drying conditions.
6. Normal conditions for storage and transportation
Temperature: When the storage temperature is 5-40℃, the wetting agent has good stability and will not become ineffective due to fluctuations in storage temperature.
Light: Under normal light-proof storage, the wetting agent will not decompose due to light, but long-term exposure to strong light should be avoided.
Vibration: Normal transportation vibration has no significant effect on the wetting agent, but violent impact should be avoided.
Summary
The core function of the wetting agent that does not affect recoating is to reduce surface tension and promote bonding between coatings. Under normal conditions of coating system, construction environment, substrate characteristics, additive dosage, coating process and storage and transportation, its effect is stable, and there is no need to adjust the formula or process due to the above factors. However, under extreme conditions (such as ultra-high temperature, strong acid and alkali, severe pollution, etc.), it is necessary to optimize the formula by selecting a special wetting agent or combining it with other additives to ensure recoating performance.