MTCS modified hydrophobic fumed silica designed for silicone rubber, sealants, adhesives and coatings. Compare GESEESIL B110, GESEESIL B120 and GESEESIL B130 technical specifications, applications and request free samples.
Item No :
28112200Order(MOQ) :
2 tonnesPayment :
T/TProduct Origin :
ChinaColor :
whiteShipping Port :
Qingdao/Shanghai/NingboGESEESIL MT Series is a range of methyltrichlorosilane (MTCS) modified hydrophobic fumed silica developed to provide excellent thickening, reinforcement, anti-settling and moisture resistance. The products are widely used in RTV silicone, HTV silicone, liquid silicone rubber (LSR), adhesives, sealants and specialty coatings.
MTCS Modified Hydrophobic Fumed Silica is produced by treating high-purity fumed silica with methyltrichlorosilane (MTCS). The surface modification replaces hydrophilic silanol groups with methyl groups, significantly improving hydrophobicity, moisture resistance and dispersion in non-polar systems.
Compared with untreated fumed silica, MTCS modified grades exhibit lower moisture absorption, superior rheology control and enhanced compatibility with silicone elastomers and organic systems.
✔ Excellent Hydrophobicity
✔ High Thickening Efficiency
✔ Outstanding Reinforcement
✔ Easy Dispersion
✔ Anti-settling Performance
✔ Moisture Resistance
✔ Stable Processing
✔ High Purity SiO₂
| Property | GESEESIL B110 | GESEESIL B120 | GESEESIL B130 |
|---|---|---|---|
| Appearance | White Powder | White Powder | White Powder |
| Surface Treatment | MTCS | MTCS | MTCS |
| Specific Surface Area (BET) | 120 ± 20 m²/g | 170 ± 20 m²/g | 230 ± 20 m²/g |
| Carbon Content | 0.5–1.0% | 0.5–1.0% | 0.5–1.0% |
| SiO₂ Content | ≥99.9% | ≥99.9% | ≥99.9% |
| Water Content (After Drying) | ≤1.0% | ≤1.0% | ≤1.0% |
| Bulk Density | 40–60 g/L | 40–60 g/L | 40–60 g/L |
| pH (4% Suspension) | 4.0–6.0 | 4.0–6.0 | 4.0–6.0 |
| Average Primary Particle Size | 14 nm | 14 nm | 14 nm |
Product Selection Guide
| Grade | Key Characteristics | Recommended Applications |
|---|---|---|
| GESEESIL B110 | Lower specific surface area, excellent dispersion and processing | RTV Silicone, General Silicone Rubber, Sealants, Adhesives |
| GESEESIL B120 | Balanced reinforcement and rheology control | HTV Silicone Rubber, Industrial Sealants, Construction Adhesives |
| GESEESIL B130 | High surface area with superior thickening and reinforcement | High-performance Silicone Rubber, LSR, Electronic Encapsulation, Specialty Coatings |
How to Choose the Right Grade?
| If You Need... | Recommended Grade |
| Better processability | GESEESIL B110 |
| Balanced viscosity and reinforcement | GESEESIL B120 |
| Maximum thickening effect | GESEESIL B130 |
| High-performance RTV silicone | GESEESIL B120 / B130 |
| Premium HTV silicone | GESEESIL B130 |
| Electronic encapsulation | GESEESIL B130 |
| High-end liquid silicone rubber | GESEESIL B130 |
Typical Applications
Silicone Rubber
Improve tensile strength, tear resistance and long-term durability for RTV, HTV and LSR silicone compounds.
Adhesives & Sealants
Provide excellent rheology control, anti-sag performance and filler suspension while improving storage stability.
Specialty Coatings
Enhance scratch resistance, anti-settling properties and coating consistency in industrial coating systems.
Performance Advantages
Excellent Hydrophobicity
Surface modification with MTCS significantly reduces moisture absorption, ensuring better storage stability and compatibility with silicone formulations.
Superior Reinforcement
The optimized particle structure effectively improves tensile strength, tear resistance and mechanical performance.
Outstanding Thickening Performance
Excellent rheology control and thixotropic behavior make the MT Series ideal for adhesives, sealants and silicone elastomers.
Stable Processing Performance
Excellent dispersion helps reduce mixing time while improving production efficiency.
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Read More
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