Powder coating anti-caking agent nano silica

Nano-silica, an anti-caking agent for powder coatings,:
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Nano-silica is produced by the gas phase method, with average particles of nanometers. Adding it to powder coatings can effectively prevent powder coatings from agglomerating and is beneficial to high-temperature storage of powder coatings. When the addition amount is generally around %, it can improve free flow performance, enhance storage stability, reduce moisture absorption, and improve edge coating effects. It can completely avoid caking during high temperatures in summer. Able to improve and optimize the production quality appearance and overall performance of powder coatings.
Improve the positive chargeability of tribological powder
In order to effectively provide free-flowing properties, % by weight (based on total weight) of fumed silica should be added to the powder coating. If fumed silica is added using an appropriate feeder before the optimal crushing step, a highly uniform dispersion throughout the powder coating can be achieved. Another common mixing method is to add fumed silica by dry mixing after the comminution step. Producers may choose to tailor the mix to meet specific process and performance requirements.
Regardless of whether the powder coating is positively or negatively charged, its electrostatic charge will not be adversely affected. Due to its moisture resistance, the use of hydrophobic fumed silica products can ensure long-lasting charging properties. The commonly used addition amount is less than %, which has no adverse effect on the leveling properties of powder coatings during the curing process.

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