Knowde Enhanced TDS
Identification & Functionality
- CASE Ingredients Functions
- Industrial Additives Functions
Features & Benefits
- CASE Ingredients Features
Applications & Uses
- Applications
- Compatible Polymers & Resins
- Applications
- Anti-Corrosive Coatings
- Marine & Protective Coatings
- Industrial Coatings
- Binder for zinc-rich anti-corrosive coatings, e .g. shop primers
- Binder for refractory fillers (production of ceramic shells and cores)
- Precision casting
- Coating material for pigments and fibers
- Liquid source of SiO2 as binder
- Crosslinking agent, e.g. for silicone elastomers
- Sol-gel processes
- Application Details
General
- WACKER® SILICATE TES 40 WNis being used for the precipitation of silica (polymeric SiO2 structures) upon complete hydrolysis. The hydrolysis creates ethanol as a by-product.
- The polymeric SiO2 structures firmly bind inorganic fillers and pigments and adhere well to different inorganic substrates like glass, ceramics or metall. Chemical and mechanical properties of the substrates can be improved by the thin SiO2 film, which is also highly heat-resistant.
Use as binder for two-pack zinc-rich ethyl silicate primers
Hydrolysis of WACKER SILICATE TES 40 WN induced by atmospheric humidity is too slow for typical moisture-curing coating applications like shop primers. The ethoxy groups must be activated by further chemical hydrolysis. This is typically done in a chemcial reactor by the addition of water and an acid catalyst in a water-miscible co-solvent. Condensation and formation of larger polymeric molecules already start during hydrolysis. The hydrolysate is the actual binder for the zinc-rich shop primer. Shelf-life of the hydrolysate is limited because the condensation slowly proceeds upon storage.
Properties
- Physical Form
- Typical Properties
- Properties
WACKER® SILICATE TES 40 WN offers these properties:
- Storage-stable, low-viscous liquid with a high silica content (41% SiO2, after full hydrolysis/dehydration)
- High flash point > 62°C
- Reactive binder after alkaline or acid-catalyzed hydrolysis for many applications
- Actual binder are polymeric SiO2-structures formed by hydrolysis and condensation reactions
| Value | Units | Test Method / Conditions | |
| Acidity | max. 10 | mg/kg | — |
| Density (at 20°C) | 1.06 - 1.07 | g/cm³ | DIN 51757 |
| Flash Point | min. 62 | °C | — |
| Hydrolysable Chloride | max. 10 | mg/kg | — |
| SiO₂ Content | approx. 41 | % | — |
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging Information
- 25 kg steel can
- 215 kg steel drum
- 1000 kg IBC
Storage & Handling
- Storage Information
WACKER® SILICATE TES 40 WN must be stored in the tightly closed original container under exclusion of moisture.