Exolit® AP 468 (TP)
Micro encapsulated APP (phase II) for demanding outside applications
- Extremely low water solubility
- Completely insoluble in organic solvents, non-hygroscopic and non-flammable
- Even lower viscosity in aqueous suspension, lower heat stability in the temperature range > 300 °C and improved powder flowability in comparison to Exolit® AP 422
- Enables to achieve requirements concerning weatherability (e.g. ETAG 018-2, Type Y) without applying a top coat.
- Enhances the durability of solvent based intumescent coatings in challenging weather conditions (e.g. high humidity and elevated temperatures)
- The application of Exolit® AP 468 (TP) based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1)
- Imparts a good flame-retardant effect to adhesives and sealants when it is incorporated into the base formulation at the rate of 10 - 20%
- Suitable non-halogenated flame retardant for polyurethane foams
- Excellent flame-retardant effect in cellulose-containing materials such as paper and wood products
- With chipboard products, the B classification according to DIN EN 13501-1 can be achieved by adding 15 - 20 %
- Casting resins based on epoxy resins or unsaturated polyester resins achieve the classification UL94-V0
- Can be used for all applications where ammonium polyphosphate is suitable
- Can be used advantageously in intumescent coatings where the ammonium polyphosphate is required to have extremely low water solubility and where lower heat stability at temperatures above 300 °C contributes to more rapid foaming of the coating
- Particularly suitable as an ”acid donor” for intumescent coatings thanks to its low water solubility. Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in EN, DIN, BS, ASTM and others
- Non-halogenated flame retardant with favorable environmental and health profile
Safety
For regulatory details such as the classification and labeling as dangerous substances or goods please refer to our corresponding material safety data sheet.
Specifications
| Characteristics | Unit | Target value | DS¹) | TD²) | Test method |
| Chemical Formula | [NH4PO3]n n > 1000 | ☐ | ☑ | ||
| Phosphorus | % (w/w) | 25 - 27 | ☐ | ☑ | Photometry after oxidizing dissolution; (11/17) |
| Water / Moisture | % (w/w) | max. 3 | ☑ | ☐ | Thermogravimetry at 130 °C; (11/03) |
| Nitrogen | % (w/w) | 19 - 22 | ☐
| ☑
| Elemental analysis; (11/07) |
| Bulk Density | g/cm³ | approx. 0.6 | ☐ | ☑ | |
| pH Value | 3 - 5 | ☑ | ☐
| Potentiometry in 10 % aqueous suspension; (11/12) | |
| Solubility in Water | % (w/w) | max. 0.04 | ☑ | ☐ | Gravimetry after filtration of a 10 % aqueous suspension at 25 °C; (11/41) |
| Average Particle Size (D50) | µm | approx. 30 | ☐ | ☑ | |
| Particle Size Distribution | % (w/w) | ☑ | ☐ | Air jet sieving; (11/02) | |
| > 250 µm | max. 0.2 | ||||
| ¹) Delivery specification: The product is constantly monitored 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. | |||||
Applications
Exolit AP 468 (TP) can be used for all applications ammonium polyphosphate is suitable for. In cases where a specific phosphorus content is required to obtain the desired effect, the lower phosphorus content of Exolit AP 468 (TP) should be compensated by increasing the amount of product added. Exolit AP 468 (TP) can be used advantageously in intumescent coatings where the ammonium polyphosphate is required to have extremely low water solubility and where lower heat stability at temperatures above 300 °C contributes to more rapid foaming of the coating.
Intumescent coatings
On account of its low water solubility, Exolit AP 468 (TP) is particularly suitable as an ”acid donor” for intumescent coatings. Other essential components of intumescent systems include a binder, a carbon donor (e.g. pentaerythritol) and a blowing agent (e.g. melamine). On exposure to flame, the intumescent coatings form a carbonaceous foam which effectively shields the underlying material from temperature increases. Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in EN, DIN, BS, ASTM and others. The application of Exolit AP 468 (TP) based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1). Intumescent coatings are needed for external use in regions with challenging high humidity conditions. Intumescent coating formulations with standard encapsulated APP can create blooming or bubbles and loose its effect as flame retardant under these conditions. A well accepted test is the water ponding test, also known as “pool-test” or so called “dunkin’-cookie” test. Exolit AP 468 (TP) meets these demanding requirements and is well suited for all IC systems for external use. Exolit AP 468 (TP) imparts a good flame-retardant effect to adhesives and sealants when it is incorporated into the base formulation at the rate of 10 - 20 %.
Polyurethane foams
Exolit AP 468 (TP) is a suitable non-halogenated flame retardant for polyurethane foams. If handling of Exolit AP 468 (TP) as a solid is not possible we recommend the dosage of the flame retardant by preparing an Exolit AP 468 (TP)/polyol-suspension. To prevent the solid from settling the Exolit AP 468 (TP) suspensions should be stirred or circulated by pump.
Other applications
Exolit AP 468 (TP) has an excellent flame-retardant effect in cellulose-containing materials such as paper and wood products. With chipboard products the B classification according to DIN EN 13501-1 can be achieved by adding 15 - 20 % Exolit AP 468 (TP). Casting resins based on epoxy resins or unsaturated polyester resins achieve the classification UL94-V0 with Exolit AP 468 (TP).
Packaging and Handling
Delivery formWhite powder
Packaging
Exolit AP 468 (TP) is packed in 40 x 25 kg-paper bags (polyethylene inliner) net per 1.000 kg-pallet, shrink-wrapped. Exolit AP 468 (TP) can also be supplied in a variety of big bags, shrink-wrapped.
Storage
Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.
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