What is the difference between organic silicon leveling agent and acrylic leveling agent

Organic silicon compounds that are generally added to materials and play an auxiliary role are called organic silicon additives. Polyether modified organopolysiloxane improves the wettability of the substrate by reducing the surface tension of the coating, increasing surface smoothness, scratch resistance, and anti adhesion, improving coating leveling, enhancing coating glossiness, and preventing Benard vortex.

Organic silicon leveling agents usually contain a certain amount of siloxymethyl, which has low surface tension. If organic silicon leveling agents are used, especially those with large amounts and high silicon content, a layer of organic silicon will accumulate on the surface of the film. This low surface tension substance, when recoating, may cause recoating problems and shrinkage if the surface tension of the topcoat is average. Acrylic leveling agents are medium polarity substances with a surface tension that belongs to the moderate level of resins. They have good compatibility with most resins, so there is no problem of recoating.

So when should we choose which leveling agent is good?

To clarify this issue, we need to first sort out their advantages and disadvantages:

Organic silicon leveling agents: Advantages: wetting leveling effect, anti foaming and anti shrinkage, and good water resistance. Application: Widely used, widely applied.

 Acrylic leveling agent: Advantages: minimizes defects, does not affect interlayer adhesion, low water sensitivity, low foaming, and good dynamic performance.

From the above advantages, we can know that organic silicon leveling agents can be used for those with good lubricity, anti foaming, anti shrinkage, and water resistance. When the coating requirements do not affect interlayer adhesion, low water sensitivity, low foaming, and good dynamic performance, acrylic leveling agents can be selected.