How to avoid agglomeration of powder coatings

2024 07/03

Powder coating is a coating product that shows a tendency to caking at a certain temperature, which is widely used in some professions, and the reason why powder coating shows a tendency to caking is mainly because the resin and leveling agent on the side of the coating will soften when heated. So in the process of using powder coating, how should we prevent the coating from showing caking?

Green Powder coating

Treatment of powder coating caking method:

1. When polyester resin is produced, select some alcohols or acids that can improve its glass transition temperature, or reduce the amount of alcohols that can reduce the glass transition temperature of the resin to improve the glass transition temperature of the polyester resin.
2. Reduce the use of low glass transition temperature polymers in powder coating formulation planning, such as leveling agents and long face agents, to ensure that the glass transition temperature of the coating system will not drop.
3. In terms of production, the broken pieces should be cooled sufficiently before entering the grinding process, and the feeding speed should be reduced and the inlet air volume should be increased to control the grinding temperature.

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