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

Tokuyama REOLOSIL DM-30 Hydrophobic Fumed Silica

Tokuyama REOLOSIL DM-30 is a hydrophobic fumed silica imported from Japan, surface-modified with dimethyldichlorosilane. It delivers strong hydrophobicity, high thixotropy and anti-settling performance, ideal for solvent-based systems, silicone rubber, sealants and LED materials.

Features Of Tokuyama REOLOSIL DM-30 Hydrophobic Fumed Silica

  1. Medium-high specific surface area reinforcement – greatly improve tensile strength and tear resistance of silicone rubber and adhesives

  2. Strong rheology control – precisely adjust liquid thixotropy, prevent sagging and sedimentation, improve construction fluency

  3. High transparency and low turbidity – suitable for transparent formulations, no impact on clarity, enhance product appearance

  4. Easy dispersion – fluffy white nano-powder, convenient to add, uniform mixing, reduce processing energy consumption

  5. Broad compatibility – compatible with water-based/UV systems, with anti-caking and flow aid functions

Typical Applications Of Tokuyama REOLOSIL DM-30 Hydrophobic Fumed Silica

  1. Paints & coatings – anti-settling and anti-sagging for solvent-based systems, improve flatness and weatherability

  2. Printing inks – enhance thixotropy and pigment dispersion, improve printing clarity

  3. Sealants & adhesives – thickening and reinforcement, boost bonding strength and waterproofing

  4. LED & electronics – high purity for encapsulation and thermal conductive adhesives

  5. Powder systems – anti-caking and flow aid, improve processing and storage stability

Specifications Of Tokuyama REOLOSIL DM-30 Hydrophobic Fumed Silica

Product TypeHydrophobic Fumed Silica
AppearanceFluffy white powder
SiO₂ Content≥99.8%
BET Surface Area215–255 m²/g
Carbon Content1.7%
pH Value (4% suspension)4.8
Moisture Content<0.5%
Bulk DensityApprox. 50 g/L
Aluminum Content<20 ppm



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