Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

HIFULL HB-132 Hydrophobic Fumed Silica

HIFULL HB-132 is a high-quality hydrophobic fumed silica deeply modified with hexamethyldisilazane. It has low thickening effect, high transparency, excellent reinforcement, thixotropic anti-sedimentation and flow aid, with good dispersibility, suitable for silicone rubber and powder coatings.

Features Of HIFULL HB-132 Hydrophobic Fumed Silica

  1. Deep hydrophobic modification – deeply treated with hexamethyldisilazane, moisture-proof and hydrolysis-resistant, improve long-term storage stability of formulas

  2. Low thickening & high transparency – mild and controllable thickening effect, no impact on product transparency, suitable for high transparency scenarios

  3. Efficient reinforcement – excellent reinforcement performance in silicone rubber filling, significantly enhance product strength, toughness and service life

  4. Excellent thixotropy & anti-sedimentation – effectively prevent particle sedimentation in the system, maintain uniform stability, optimize construction and use performance

  5. Easy dispersion & processing – fluffy white powder, no agglomeration, fast wetting and dispersion, suitable for various production processes, reducing processing costs

Typical Applications Of HIFULL HB-132 Hydrophobic Fumed Silica

  1. Silicone rubber products – efficient reinforcement, improve mechanical properties and toughness of products, extend service life

  2. Powder coatings – improve free fluidity of powder, prevent caking, optimize coating processing and construction performance

  3. Paints & coatings – thixotropic anti-sedimentation and low thickening, enhance film transparency and construction leveling

  4. Sealants & adhesives – improve thixotropy and bonding strength, enhance waterproof sealing and long-term reliability

  5. Printing inks – stabilize system rheology, prevent pigment sedimentation, improve printing clarity and color stability

Specifications Of HIFULL HB-132 Hydrophobic Fumed Silica

AppearanceFluffy white powder
SiO₂ Content≥99.8%
BET Surface Area380±30 m²/g
pH Value (4% suspension)3.7–4.5
Loss on Drying≤2.5%
Loss on Ignition≤2.5%
Tap Density40–60 g/dm³
Screen Residue (45μm)≤250 mg/kg
Iron Content≤30 ppm
Aluminum Content≤50 ppm



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