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Exolit AP 468 (TP) is a newly developed test product based on ammonium polyphosphate (APP).
Exolit AP 468 is manufactured from long-chain phase II APP by micro-encapsulation with melamine formaldehyde resin according to Clariant’s unique method.
Exolit AP 468 (TP) is a free flowing white powder with very low solubility in water, even at elevated temperatures. Additionally, it is completely insoluble in organic solvents. The product is non-hygroscopic and non-flammable.
Benefits
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
Exolit AP 468 can be used for all applications where ammonium polyphosphate is suitable
Exolit AP 468 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
Applications
Paints & Coatings — Building & Construction
Wood Coatings & Finishes
Consumer Goods — Furniture
Paints & Coatings — Industrial Coatings
Furniture Coatings
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).
Physical Form
Powder
Solid
Appearance
White Powder
Exolit AP 468 (TP) by Clariant acts as a halogen-free, micro-encapsulated flame retardant.
Exolit AP 468 (TP) is based on a non-hygroscopic and non-flammable, highly water resistant ammonium polyphosphate (APP). Designed for polyurethane foams, insulation, dispersion, fibre/ fabric treatment and rubber seals.
Exolit AP 468 (TP) is manufactured from long-chain phase II APP by micro-encapsulation with melamine formaldehyde resin according to Clariant’s unique method. Provides low viscosity in aqueous suspension, lower heat stability and improved powder flowability.
Exolit AP 468 (TP) is suggested for PU resins, epoxy or unsaturated polyester resins.
Modified melamine borate flame retardant. Excellent flame retardant effect. Used in intumescent coatings. Provides high stability to water and humidity to external coatings. Possesses a good storage stability. Does not produce toxic combustion gases. Act both as a nitrogen source (blowing agent) and as a strong intumescent agent.
New non-halogenated flame retardant Exolit AP 468 (TP) for intumescent solvent-based coatings used in demanding conditions reduces the possibility for the coating’s fire resistance performance to be affected by the formation of water-related blisters.
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