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

HIFULL HB-152 Hydrophobic Fumed Silica

HIFULL HB-152 is a high-quality hydrophobic fumed silica, modified with DDS from HL-200 hydrophilic silica. It has high transparency, strong hydrophobicity, good dispersibility, efficient thixotropy, excellent reinforcement and flow aid, suitable for electronic potting, silicone rubber and coatings.

Features Of HIFULL HB-152 Hydrophobic Fumed Silica

  1. DDS targeted modification – precisely modified with dimethyldichlorosilane, stable hydrophobicity, water contact angle over 140°, moisture-proof and hydrolysis-resistant

  2. High transparency & low interference – excellent transparency, no obvious yellowing, no impact on product appearance and optical performance

  3. Efficient thixotropic control – shear thinning and static thickening, anti-sagging and anti-sedimentation, optimize construction and molding effect

  4. Strong reinforcement – significantly improve tensile strength and tear resistance of silicone rubber, extend product service life

  5. Easy dispersion & processability – fluffy powder without agglomeration, fast wetting and dispersion, suitable for various organic systems and production processes

Typical Applications Of HIFULL HB-152 Hydrophobic Fumed Silica

  1. Electronic potting glue – suitable for RTV silicone rubber potting, providing insulation, reinforcement and rheological stability to ensure electronic device safety

  2. RTV silicone rubber – thickening, thixotropy and anti-sedimentation, improve mechanical properties and long-term stability

  3. Paints/inks – anti-sagging and anti-pigment sedimentation, enhance film flatness, scratch resistance and weatherability

  4. Adhesives/sealants – optimize rheological properties and bonding strength, enhance long-term waterproof sealing reliability

  5. Powder coatings – flow aid and anti-caking, reduce coating white spots, improve coating processability and finished product appearance

Specifications Of HIFULL HB-152 Hydrophobic Fumed Silica

BrandHIFULL
Product TypeHydrophobic Fumed Silica / Nano Silicon Dioxide
AppearanceWhite fluffy powder
ModifierDDS (Dimethyldichlorosilane)
SiO₂ Content≥99.8%
BET Surface Area170 ± 30 m²/g
pH Value≥3.9
Loss on Drying≤0.5%
Tap Density40–60 g/L
Primary Particle Size10–14 nm


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