Tokuyama REOLOSIL DM-20S is a hydrophobic fumed silica imported from Japan, surface-modified with dimethyldichlorosilane. It has medium-high specific surface area, strong thixotropic thickening and excellent reinforcement, designed for polar liquid systems and suitable for paints, inks and silicone rubber
Strong hydrophobicity & hydrolysis resistance – organically modified surface, moisture-proof and hydrolysis-resistant, prolong formula shelf life
Medium-high specific surface area reinforcement – ultra-fine particle structure, effectively enhance mechanical strength of silicone rubber
Strong thixotropic control – quickly form 3D network, prevent sagging and sedimentation, improve construction accuracy
Ultra-high purity – extremely low metal ions, meet high-cleanliness requirements of LED and transparent rubber
Multi-system compatibility – suitable for polar solvent systems, with flow aid and anti-caking functions, easy to process
Paints & coatings – thickening and anti-settling for polar systems, improve film flatness, weatherability and adhesion
Printing inks – enhance thixotropy and pigment dispersion, improve printing clarity, color stability and printability
Sealants & adhesives – thickening and reinforcement, improve bonding strength, waterproof performance and long-term stability
LED & electronic materials – high purity for encapsulation, ensure insulation and electronic performance stability
Silicone rubber & elastomers – efficient reinforcement, improve toughness, wear resistance and aging resistance
| Product Type | Hydrophobic Fumed Silica |
| Appearance | Fluffy white powder |
| SiO₂ Content | ≥99.8% |
| BET Surface Area | 160–200 m²/g |
| Carbon Content | 1.7% |
| pH Value (4% suspension) | 4.8 |
| Moisture Content | <0.5% |
| Bulk Density | Approx. 50 g/L |
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