What are the conditions for powder coating additives?

additives are also an important component of powder coating formulations, although compared with resins, curing agents, pigments and fillers, their dosage is relatively small, only a few thousandths to a few percent of the total amount of the formula, but its effect on coating and coating performance can not be ignored. In some cases, additives play a decisive role. For example: in the formulation of thermoo-solid powder coating that requires a smooth appearance of the coating, if there is no additive such as leveling agent, it is not possible to obtain a coating without shrink holes, etc.
There are differences in the variety of additives required for different powder coating varieties, but from the basic requirements should be the following conditions: the amount of additives in the formulation is very small, in order to disperse the additives , in the process of manufacturing powder coatings, the requirements are easy to disperse; Coating coloring, good chemical stability of additives, in the powder coating manufacturing, storage and use process, in addition to special needs (e.g., the promoter in the baking curing process of chemical reactions), generally do not chemical reactions with resins, curing agents, pigments and fillers, but also not affected by air, moisture, temperature and environmental conditions.
also requires that in the consideration of human health and environmental protection, additives are preferably non-toxic or low-toxic. From the storage stability of powder coatings and the manufacturing process to add convenient considerations, additives are preferably solid powder, and good compatible with resins, curing agents. The varieties of additives commonly used in powder coatings are leveling agents, brighteners, degassing agents, de-foaming agents, dispersants, anti-static agents, frictional charge aids, promoters, anti-blocking agents (loose agents or loose agents), powder rate modifiers, hardness modifiers, anti-scratch agents, anti-flow hanging agents, plasticizers, Antioxidants, UV absorbents, photosensitive agents, antibacterial agents, wrinkle agents, orange pattern agents, turtle tattoos, hammers, sand patternants, pattern agents (floating agents) and lubricants and other additives, the most commonly used are leveling agents, brighteners, degassing agents, defrost agents and other additives.
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