The Role of Wetting Agent in Coatings

Nov 4, 2021

The role of wetting agent in paint is as follows:
1. The function of wetting the substrate
Paint wetting agents are divided into two types: substrate wetting agent and wetting dispersing agent. The substrate wetting agent is used to improve the surface tension and permeability of the coating, so that it can better wet the substrate, thereby improving Coating adhesion, especially for improving the adhesion of primers to substrates, is widely used, generally some fluorocarbon or fluorocarbon modified ionic or non-ionic substances or other substances that can improve the wetting of the substrate substance.
2. Assist in dispersion and anti-sedimentation

In addition to this function, the wetting and dispersing agent for coatings has one of the most important functions to assist in the dispersion of fillers and pigments and assist in the anti-settling effect, which can assist in the dispersion and dispersion of pigments and fillers in the coating. Assist the subsequent anti-settling of the coating anti-settling agent. In the anti-settling after the coating is diluted, the anti-settling effect of the wetting and dispersing agent is far more important than that of the anti-settling agent.

Principle function of humectant
Water can soak glass because the silicates of glass are polar substances, and their interaction is strong and can be close to each other to reduce the surface energy of water. Water cannot wet because wax is a non-polar substance, and the force between them is weak and cannot be close to each other to reduce the surface energy of water. When the surface energy is high, the water automatically shrinks into a spherical shape.

Wetting agents are surfactants, which are composed of hydrophilic and lipophilic groups. When in contact with a solid surface, the lipophilic group adheres to the solid surface, and the hydrophilic group extends outward into the liquid, so that the liquid forms a continuous phase on the solid surface. This is the basic principle of wetting.
We rarely see extreme pressure high temperature grease in our lives. Many people don’t know much about extreme pressure high temperature grease. High temperature grease is a specially developed synthetic grease with a very high concentration of PTFE lubricating particles. , After professional production and deployment, it can be well adapted to high temperature and heavy-duty equipment. So what is the effect of using such a grease? What are its main features? Let’s take a look at some basic introductions to better use high-temperature grease and exert its good effects.
1. It is made of medium-viscosity modified silicone oil. It is a cost-effective fluorinated grease and is compatible with most rubber and plastics.
2. Excellent high temperature performance and oxidation stability, prevent high temperature deterioration of lubricating grease, and ensure long-term normal operation of lubricating parts at high temperature.
3. Excellent mechanical stability, colloidal stability and storage properties, to ensure that it will not be lost in the lubricated part, and has a long service life;
4. High temperature grease adhesion performance, mechanical stability and colloidal stability are good, and will not be lost in the lubricating part;
Utilizing the performance characteristics of high-temperature grease, it is widely used in more industries to increase the lubrication effect, and at the same time reduce the wear caused by the friction between parts, and its role is more prominent in the maintenance of equipment. Therefore, it can effectively improve production efficiency and reduce overall costs. However, you must keep it clean during use to prevent the mixing of mechanical impurities, dust, water and other solvents. After touching this product, please wash your hands before eating.