WACKER HDK N20 10/1
WACKER HDK N20 10/1 is a synthetic, hydrophilic, amorphous, high-purity fumed silica produced by the flame hydrolysis method. It is a standard product for industrial applications, in the form of a white colloidal powder. Thanks to its high purity and specific surface area, it plays a critical role as a component in many industrial formulations.
Applications and Properties
It exhibits excellent performance as a thickening (viscosity-increasing) and thixotropic agent in organic systems (unsaturated polyesters, industrial coatings, printing inks, adhesives, and cosmetics). It is also used as a reinforcing filler in elastomers, especially silicone elastomers, and as a free-flow additive in the production of technical powders. It provides rheology control in a wide range of applications, from structural bonding of wind turbines to marine coatings. It is not suitable for the pharmaceutical, food, and feed industries. For optimal performance, it is essential that the product is well dispersed within the formulation.
Technical Data
| Property | Value | Test Method |
|---|---|---|
| BET Surface Area | 175 - 225 m²/g | DIN ISO 9277 / DIN 66132 |
| Tapped Density | Approx. 40 g/l | DIN EN ISO 787-11 |
| pH Value (4% aqueous dispersion) | 3.8 - 4.3 | DIN EN ISO 787-9 |
| SiO2 Content | > %99.8 | DIN EN ISO 3262-19 |
| Loss on Drying | < %1.5 | DIN EN ISO 787-2 |
| Silanol Group Density | 2 SiOH/nm² | - |
Storage and Safety
The product should be stored in its original packaging in dry storage areas. Due to its high surface area, it tends to adsorb volatile substances; therefore, it must be protected from moisture and volatile gases. It may cause electrostatic charges during handling and processing. This product, belonging to the class of amorphous silicas, does not exhibit carcinogenic or mutagenic properties.
Frequently Asked Questions
In which industries is WACKER HDK N20 10/1 used?
It is widely used in many industrial fields such as coatings, paints, printing inks, adhesives, composites, wind energy, and cosmetics.
What is the primary function of the product in formulations?
It functions as a rheology control agent, thickener, and thixotropic agent in organic systems; as a reinforcing filler in silicone elastomers, and as a free-flow additive in technical powders.
Can it be used in the food or pharmaceutical sector?
No, WACKER HDK N20 10/1 is not suitable for pharmaceutical, food, and animal feed applications.
What are the storage conditions?
It should be stored in its original packaging, in a dry area. Due to its high surface area, it must be strictly protected from moisture and volatile substances.
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