Fumed Silica For Powder Coating | China

Project details

  • Application: Powder Coating (Polyethylene terephthalate system) for Aluminum Products 
  • Location: Anhui Province, China
  • Problem: Poor free flow performance, easy to cake after certain days, powder coat can’t spray out
  • Functions: HIFULL fumed silica in powder coating, Prevent powder coating from moisture, avoid caking issues, improve flow ability


Hydrophilic fumed silica is more often used in water-based coatings for thickening, sag-resistance or sedimentation resistance. In contrast, hydrophobic fumed silica is more suitable for powder coating to avoid caking due to its water-repellent properties, such as HIFULL HB-151 or HIFULL HB-630.


HIFULL® HB-151(BET=150㎡/g)

HIFULL® HB-151 is Hydrophobic Fumed Silica which is produced by hydrophilic fumed silica with a specific surface area of 150m2/g after chemical post-treatment with DDS(Dimethyldichlorosilane). Properties Characteristics Properties Unit Typical Value…

HIFULL® HB-630 (BET=400㎡/g)

HB-630 is Hydrophobic Fumed Silica produced by hydrophilic fumed silica with a specific surface area of 400m2/g after chemical post-treatment with HMDS (Hexamethyldisilazane). Properties Characteristics Properties Unit Typical Value Testing Standard…

Client Feedback

This client has tested two grades of HIFULL hydrophobic fumed silica HB-151 & HB-630, HIFULL HB-630 shows better performance on flow aid and cake resistance. HB-630 has a larger specific surface area than HB-151, so it has better water-repellent properties and anti-cake. HIFULL HB-630 is more suitable for this customer’s powder coating product.

Read More: The Application of Fumed Silica in Powder Anti-caking

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