How To Choose Powder Coating Binding Additives

When selecting powder coating binding additives, multiple factors need to be considered to ensure that the selected additives can meet the production and application requirements of the coating. The following are some key selection points:

1. Compatibility with resins

Powder coating additives must remain in the powder coating for a long time to exert their due effectiveness. Therefore, the selected additives should have good compatibility with resins such as epoxy, polyester, and acrylic. This can usually be evaluated by comparing the similarity between the additive and the resin structure.

2. Adaptability to production process

The production process conditions of powder coatings may be harsh, such as high temperature, low temperature, high-speed shear, etc. These conditions may cause the additives to decompose, volatilize and fail. Therefore, when selecting additives, it is necessary to consider their similarity to the production process. For example, some patterned powder coating additives cannot be extruded from the extruder together with the base material, but need to be added to the finished powder later to show the pattern they should have.

III. Multifunctionality and synergistic effect

Some powder coating additives may have dual or multiple functions in addition to their main role. When selecting, the multifunctionality of the additives should be fully considered, and the synergistic effect between different additives should be tried to improve the overall performance of the coating. For example, zinc oxide can replace part of titanium dioxide as a white pigment, while having a certain conductivity and shielding ultraviolet rays. In addition, carbon black and thiophenol antioxidants have excellent synergistic antioxidant effects in pure polyester outdoor powder coatings.

IV. Impact on coating performance

The selection of additives should also consider their impact on coating performance. For example, leveling agents can improve the leveling and glossiness of coatings; brighteners can improve the glossiness of coatings; matting agents can reduce the glossiness of coatings. When choosing, it is necessary to determine the type and amount of additives required according to the final use and performance requirements of the coating.

V. Environmental protection and safety
With the improvement of environmental awareness, the environmental protection and safety of powder coating additives are also receiving more and more attention. When selecting additives, it is necessary to consider whether they contain toxic and harmful substances and whether they will cause harm to the environment and human health. At the same time, attention should also be paid to the biodegradability and recyclability of the additives.

VI. Cost and benefit
When selecting powder coating additives, it is also necessary to consider their cost and benefit. On the one hand, it is necessary to ensure that the price of the selected additives is reasonable to reduce production costs; on the other hand, it is also necessary to consider the use effect of the additives and the degree of improvement of the overall performance of the coating to ensure that the selected additives can bring good economic benefits.

In summary, when selecting powder coating binding additives, you need to consider multiple factors, including compatibility with resins, adaptability to production processes, versatility and synergy, impact on coating performance, environmental protection and safety, and cost and benefits. By comprehensively evaluating these factors, you can choose the type and amount of additives that best suit your production needs.