Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Chemical Name
- CASE Ingredients Functions
- Composite Materials Functions
- Technologies
Features & Benefits
- CASE Ingredients Features
- Materials Features
Applications & Uses
- Applications
- Compatible Polymers & Resins
- Composites End Use
- Applications
- Adhesives
- Anti-Corrosive Coatings
- Composites
- Do It Yourself
- Flooring Installation
- Industrial Coatings
- Rheology Control
- Sealants
- Structural Bonding of Wind Turbines
- Wind Energy
- Application Details
HDK® H21 is applied as a thickening and thixotropic agent in composites, coatings, adhesives and sealants, especially in vinylester, epoxy and polyurethane systems. It is not suitable for pharmaceuticals, food and feed. A good dispersion of HDK® H21 is a must to assure optimum performance.
Properties
- Color
- Appearance
- White colloidal powder
- Typical Properties
- Specifications
- Properties
White colloidal powder of high purity.
| Value | Units | Test Method / Conditions | |
| BET Surface (of the hydrophobic silica) | approx. 110 | m²/g | DIN ISO 9277 DIN 66132 |
| Density (at 20°C, SiO₂) | approx. 2.2 | g/cm³ | DIN 51757 |
| SiO₂ Content (based on the substance heated at 1000°C for 2 hours) | min. 99.8 | % | DIN EN ISO 3262-19 |
| Value | Units | Test Method / Conditions | |
| BET Surface (of the hydrophilic silica) | 170 - 230 | m²/g | DIN ISO 9277 DIN 66132 |
| Carbon Content | 4.8 - 6.4 | % | DIN ISO 10694 |
| Loss on Drying (at 105°C, 2 hours) | max. 0.6 | % | DIN EN ISO 787-2 |
| pH (in 4% dispersion, 1:1 mixture of water-methanol) | 4.0 - 7.0 | — | DIN EN ISO 787-9 |
| Sieve Residue (min. 40 µm) | max. 0.1 | % | DIN EN ISO 787-18, Mocker Apparatus |
| Surface Modification | Polydimethylsiloxy | — | — |
| Tamped Density | approx. 50 | g/l | DIN EN ISO 787-11 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Notes
During transportation and processing HDK® H21 may cause electrostatic charges. Like other amorphous silicas HDK® H21 does not show either carcinogenic (IARC classification, Volume 68, 1997) or mutagenic properties.
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging Information
HDK® H21is offered in following packaging:
- Pallet with paper bags: 10 kg bags
- Big bags: 170 kg (big bag on pallet)
Storage & Handling
- Storage Information
HDK® H21should be stored in the original packaging in dry storage areas.