There are many types of coating additives, including wetting and dispersing agents, wetting agents, defoamers, leveling agents, etc. Applied to various industries, including water-based coatings, colorants, wood coatings, etc.
With the development of coatings, coating additives occupy a position in the coating market.
Coating additives, also known as paint accessories, are auxiliary materials used in the formulation of coatings. They are an indispensable component of coatings, and although they only account for 1% of the entire coating formula, they can improve production processes, maintain storage stability, improve construction conditions, enhance product quality, and endow special functions.
The addition of coating additives is of great help in improving the performance of coatings.
With the development of high-quality and high-performance wood coatings, the use of low dosage and highly effective smoothing and leveling agents in coatings has attracted increasing attention. Among them, polyether modified silicone oil is the most widely used leveling agent in the coating industry, with good smooth flow effect. It can reduce the surface tension of the coating, decrease the surface tension gradient of the coating film, prevent the formation of Bernad dimples, improve leveling and gloss, reduce the interfacial tension between the coating and substrate, improve substrate wetting, and reduce surface defects such as shrinkage.
A considerable number of domestic additive companies rely mainly on agency and lack the ability to develop their own products. In recent years, numerous foreign brands have flooded into China, causing a significant impact on the domestic additive industry. At present, imported organic silicon leveling agents have been widely used in high-end coatings such as automotive paint and furniture paint, occupying the majority of the market share.
Organosilicon leveling agents are mainly modified silicone oils with different structures, and a series of leveling agents with different properties can be obtained through structural changes. The performance focus of organic silicon leveling agents mainly includes the following aspects: leveling, compatibility (transparency in clear varnish), coating smoothness, low foam stability, anti adhesion, substrate wetting, and anti shrinkage porosity.
When selecting leveling agents, it is necessary to choose them according to the formula requirements, in order to achieve optimal performance while avoiding side effects and achieving balance.
In addition, with the increasing awareness of environmental protection, the environmental performance of coating additives has also gradually attracted attention.
Coating additives can be divided into oil-based coating additives and water-based coating additives. In response to the increasing global emphasis on environmental protection, the development of water-based coating additives has made a leap forward. There are increasingly more environmentally friendly types of additives. The application is also becoming increasingly widespread. This is the mainstream direction for the future development of coating additives.
Reasonable and correct selection of additives can reduce costs and improve economic benefits. For example, it plays a crucial role in improving the performance of coatings, such as surface smoothness, scratch resistance, gloss, or improving the production process.
