Exolit™ BA 701 (TP)
Exolit™ BA 701 (TP) is a SVHC-free blowing agent, specifically designed for use in intumescent coating systems. It acts as gas-releasing component within the intumescent reaction. Upon thermal activation, the product undergoes controlled decomposition, releasing voluminous gases (primarily ammonia and carbon dioxide) that expand the carbonaceous char layer formed by the acid donor and carbon source components present in the intumescent formulation.
The protective mechanism is based on several synergistic effects:
- Char expansion: The released gases cause the forming char layer to expand significantly, creating a highly insulating, low-density foam structure that acts as a physical and thermal barrier between the flame and the underlying substrate
- Thermal insulation: The expanded intumescent char dramatically reduces heat transfer to the substrate, delaying critical temperature rise
- Diffusion barrier: The stable foam char limits oxygen supply to the combustion zone and suppresses the release of combustible pyrolysis gases, subsequently reducing heat release
- Endothermic contribution: The decomposition reaction absorbs energy from the system, further reducing substrate temperature Through this combination of effects, the thermal degradation and structural failure of protected substrates is significantly delayed, providing essential passive fire protection in building and construction applications.
Product Information
- SVHC-free
- Free of Melamine salts
- Excellent thermal activation profile, matched to the decomposition temperature of standard acid donor systems (e.g., ammonium polyphosphate)
- High gas yield per unit weight, enabling efficient intumescent char expansion
- Compatible with a wide range of binder systems including epoxy, acrylic, polyurethane- and vinyl acetate-based intumescent coatings
- Contributes to outstanding fire resistance performance in steel protection applications
- Improving char strength of formed layer
Hazards
The product does not require a hazard warning label according CLP regulation (Regulation (EC) No. 1272/2008, as amended).
For further information please refer to the Material Safety Data Sheet.
| Characteristics | Unit | Target value | DS¹) | TD²) | Test method |
| Appearance | White to slightly yellowish powder |
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Visual evaluation | |
| Water / Moisture | % (w/w) | Max. 1 |
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Karl Fischer Titration |
| Purity | % (w/w) | Min. 97 |
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HPLC |
| Water solubility | % (w/w) | Max. 2 |
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Gravimetry after filtration of a 10 % aqueous suspension |
| Nitrogen | % (w/w) | 38 - 40 |
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Elemental analysis (11/07) |
| Density | g/cm³ | approx. 1.6 |
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at 25 °C, Gas-displacement pycnometer, acc. DIN 51913 |
| Bulk Density |
g/cm³ |
approx. 0.4 |
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Value after filling |
| Decomposition Temperature | °C | > 250 |
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Initial weight loss |
| ¹) Delivery specification: The product is monitored on a regular basis to ensure that it adheres to the specified values. Test methods: Clariant method numbers 11/xx in brackets. ²) Technical data: The technical data are used solely to describe the product and are not subject to regular monitoring. |
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Exolit BA 701 (TP) may be used in a range of intumescence coating applications.
Delivery form
Free-flowing powder
Packaging
Exolit BA 701(TP) is supplied in bags with 20 kg net weight.
Storage
Minimum shelf life is 12 months from the date of shipping when stored according to the recommended conditions.
