Leveling agents can effectively prevent orange peel phenomenon on the surface of coatings

Leveling agents can effectively prevent the orange peel phenomenon on the surface of coatings:

During the process of coating application, a series of phenomena such as orange peel and shrinkage cavity often occur on the surface of the coating. In order to effectively prevent these phenomena from occurring, leveling agents are often used to effectively prevent them. What should be noted during the use of these coating additives? Below, the editor of Jianyi Chemical will introduce it in detail to everyone!

In practical work, active propellants or leveling agents are often used to improve the appearance of coatings and eliminate surface defects such as orange peel and shrinkage. A well functioning active propellant can reduce the melt viscosity and facilitate the wetting of the substrate before melting and pigment dispersion. The active leveling of the coating helps eliminate surface defects and facilitates air release. The relationship between the dosage and effect of activity modifiers should be investigated. Insufficient usage can lead to shrinkage and orange peel, while excessive usage can result in loss of gloss, fogging, and adhesion to the upper layer. General activity modifiers are included during pre mixing. They can be made into resin masterbatch and adsorbed in powder form on inorganic carriers. When the dosage of this additive in powder coating is 0.5-1.5%, it can also work well.

Promoting activities and leveling can reduce or prevent orange peel. The system utilizes lower melt viscosity, extended leveling time during solidification, and higher surface tension to facilitate forward movement and leveling. Controlling the gradient of surface tension is an important parameter for reducing orange peel, and it is also necessary to control the average surface tension of the coating to achieve the minimum surface area.