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

Tokuyama REOLOSIL HM-30S Hydrophobic Fumed Silica

Tokuyama REOLOSIL HM-30S is a hydrophobic fumed silica imported from Japan, made from high-purity raw materials with special surface modification. It features excellent thixotropy, anti-sedimentation, reinforcement and flow aid, suitable for coatings, inks, adhesives and electronic materials with good compatibility.

Features Of Tokuyama REOLOSIL HM-30S Hydrophobic Fumed Silica

  1. Strong hydrophobicity & moisture-proof – fully surface-modified, reduce moisture absorption, improve storage stability

  2. Efficient thixotropy & anti-sedimentation – quickly form 3D structure, prevent sagging and pigment settling

  3. Good reinforcement & toughening – enhance mechanical strength and aging resistance of elastomers

  4. Powder flow aid & anti-caking – improve powder fluidity and prevent caking

  5. High purity & low impurity – low metal ion content, suitable for LED and electronic encapsulatio

Typical Applications Of Tokuyama REOLOSIL HM-30S Hydrophobic Fumed Silica

  1. Paints & coatings – thicken and thixotropic, anti-sedimentation, improve film uniformity

  2. Printing inks – stabilize rheology, improve printing clarity and color reproducibility

  3. Sealants & adhesives – enhance bonding strength, waterproof and long-term reliability

  4. LED & electronic materials – high purity for encapsulation, ensure insulation stability

  5. Powder materials – flow aid and anti-caking, optimize processing and packaging

Specifications Of Tokuyama REOLOSIL HM-30S Hydrophobic Fumed Silica

Product TypeHydrophobic Fumed Silica
AppearanceFluffy white powder
SiO₂ Content≥99.8%
BET Surface Area80–120 m²/g
Carbon Content3.2%
pH Value (4% suspension)5.5–7.5
Moisture Content<0.5%
Bulk DensityApprox. 50 g/L
Primary Particle SizeApproximately 20 nm
Aluminum Content<20 ppm


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