Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Fluids & Lubricants Functions
- Industrial Additives Functions
Features & Benefits
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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.
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Applications & Uses
- Markets
- Applications
- Fluids & Lubricants Type
- Fluids & Lubricants End Use
- Industrial Additives End Use
- Use Level
- 0.1 - 2%
- Applications
SILFOAM® SE 4260 can be applied in a broad range of applications:
- In particular it is used in the oil & gas industry for drilling fluids.
- SILFOAM® SE 4260 is applicable as internal antifoam agent in the drilling fluid to control foam.
- It is also applicable as defoamer for addition on-demand.
- Application Details
- Preliminary compatibility and stability tests should be performed on the system to be defoamed.
- The amount to add to liquid formulations depends on the desired degree of foam control, but usually is between 0.1 and 2%.
- If feed pumps are used, they should be of the low shear-force type.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Active Ingredients | 44 | % | — |
| Density (at 20°C, 1013 hPa) | 1.05 | g/cm³ | DIN 51757 |
| Dynamic Viscosity (at 25°C, Brookfield, spindle 1, 50 rpm) | 500 - 1000 | mPa·s | — |
| Emulsifier Type | o/w, Non-ionic | — | — |
| pH (at 25°C) | 4.0 - 7.0 | — | Indicator strips |
| Solid Content | 53.0 - 58.0 | % | — |
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Country Availability
- Regional Availability