The main function of coating leveling agents is to improve the surface performance of coatings and reduce surface defects. Water based leveling agents do not contain harmful substances such as APEO and VOC. Plays an important role in improving the feel of various coatings.Imported water-basedLevelingagentLow dosage, good effect.
There are three main functions and types of coating leveling agents:
1. Improve liquidity and extend turnover time. This function is mainly achieved by adjusting the drying speed appropriately based on the drying characteristics of the coating. For example, solvent based coatings adjust the solvent evaporation rate, enhance the solvent's solubility in the system resin, and reduce the system viscosity to achieve; Extend the settling time and curing time of other coatings to achieve this. High boiling point solvents mainly include aromatic hydrocarbons, ketones, esters, alcohols and their mixtures, as well as tetrahydronaphthalene.
2. The formation of a monolayer on the wet film surface creates uniform surface tension, creating conditions for the smooth flow of the coating film. These functional additives are mainly represented by organosilicon and fluorine modified organosilicon products.
3. Enhance the wetting ability of the substrate. By utilizing the characteristics of low molecular weight, low surface tension, and incomplete compatibility with the paint system of coating leveling agents, their molecules can penetrate or penetrate the resin wet film to assist in coatingThe material enhances the wettability of the substrate, eliminates hidden gas molecules, and completes the wetting of dust particles, thereby avoiding shrinkage and pinholes. These types of additives are represented by acrylic polymers, cellulose acetate, and modified organosilicon products.
Selection of coating leveling agents:
From the introduction of the functions of coating leveling agents, it can be seen that the application range of different types of coating leveling agents is limited to a certain extent. In fact, people rarely use a single component of coating leveling agent alone. Most of the coating leveling agent products on the market are also compound varieties, but each has its own focus and complementary functions, making it more convenient for coating engineers to choose and apply.
Paint leveling agents have the following characteristics:
*It has auxiliary effects on eliminating stains and reducing orange peel phenomenon.
*It does not contain residual toxic substances and is a new generation of green additives.
*It has good compatibility and helps to improve the gloss and fullness of the paint film.
*The leveling effect is significant and does not affect recoating properties.
*It has an auxiliary effect on preventing the floating and layering of pigments and dyes.
