Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Chemical Family
- Chemical Name
- CASE Ingredients Functions
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- CASE Ingredients Features
- Materials Features
Applications & Uses
- Markets
- 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
- Physical Form
- Appearance
- White colloidal powder
- Typical Properties
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 - Specifications
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 - Properties
White colloidal powder of high purity.
Regulatory & 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.