GS-380S is a hydrophobic fumed silica derived from hydrophilic fumed silica with a specific surface area of 380, treated with hexamethyldisilazane. It is suitable for powder materials, defoamers, and medium- to highly polar systems.
Item No :
28112200Order(MOQ) :
2TonPayment :
T/TProduct Origin :
CHINAColor :
WHITEShipping Port :
Shanghai/Ningbo/QingdaoLead Time :
45 DaysWeight :
10KG/BAGsize :
10KGcharacteristics
GS-380S is a high-purity hydrophobic fumed silica obtained through the chemical treatment of hydrophilic fumed silica with a specific surface area of 380 m²/g using hexamethyldisilazane (HMDS) as the silylating agent. This surface modification replaces silanol groups with trimethylsilyl groups, resulting in a strongly hydrophobic material with markedly improved compatibility in organic systems.
It is particularly suitable for use as a free-flow and anti-caking agent in powdered materials, as an efficient defoamer and antifoam agent in liquid formulations, and as a rheological additive for reinforcing medium- to high-polarity systems such as coatings, adhesives, sealants, and elastomers. Its hydrophobic nature ensures low moisture absorption and enhanced dispersion stability in non-aqueous environments.
Technical Data Sheet
| UNIT | VALUE | |
| Specific Surface Area | ㎡/g | 260±20 |
| pH | 6.0-8.0 | |
| Drying Loss(2hr. at 105°C) | wt.% | ≤2.0 |
| Ignition Loss(2hr. at 1000°C) | wt.% | ≤4.0 |
| Tapped Density | g/dm³ | 40-60 |
| 45μm Sieve Residue Mass Fraction | mg/kg | ≤400 |
| Particle Size (Laser) | μm | ≤15 |
| Dispersion | ≤2 | |
| Carbon Content | wt.% | 2.0-4.0 |
| Methane Value (M Value) | vol.% | 55-65 |
| Unit Packaging (Net Weight) | kg | 10 |
Properties:
1. Used as an excellent flow aid in powder coatings, its high specific surface area ensures the powder maintains good flowability even during prolonged storage. Deep hydrophobic treatment provides superior electrostatic charging properties, effectively enhancing powder coating application efficiency.
2. When used as a dispersing agent in dry-mixed colorants and blended powder materials with significant density variations, it ensures consistent dispersion of materials with differing densities.
3. In adhesives and sealants, it not only provides reinforcement but also enhances corrosion resistance and temperature tolerance.
4. Compared to other dispersants in defoamers, it accelerates defoaming while prolonging foam suppression duration.
5. As a dispersant in heavy-duty anti-corrosion coatings and inks, it simultaneously improves soil flash resistance and water resistance.
Applications:
Recommended
SK-200S is a hydrophobic fumed silica obtained by treating hydrophilic fumed silica with a specific surface area of 200 m²/g with hexamethyldisilazane (HMDS). It is particularly suitable for powder materials, oil-based systems, and medium- to high-polarity systems.
Read More
GS-380S is a hydrophobic fumed silica derived from hydrophilic fumed silica with a specific surface area of 380, treated with hexamethyldisilazane. It is suitable for powder materials, defoamers, and medium- to highly polar systems.
Read More
GS-272 is a hydrophobic fumed silica derived from hydrophilic fumed silica with a specific surface area of 150, treated with dimethyldichlorosilane. It is more suitable for applications such as coatings and inks.
Read More
GS-274 is a hydrophobic fumed silica derived from hydrophilic fumed silica with a specific surface area of 200, treated with dimethyldichlorosilane. It is more suitable for applications such as coatings and inks.
Read More
IPv6 network supported