Melapur
Halogen free flame retardants
The trend towards more stringent requirements for flame retardancy in aircraft interiors, with concerns about increased regulatory requirements for halogenated flame retardants, is forcing developments in the direction of non-halogenated alternatives.
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Regulatory compatibility
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Protection throughout product lifecycle
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Offers flexibility in use
All Melapur flame retardants are free of halogens, antimony or any other heavy metals. The Melapur flame retardant product range comprises Melapur MC (melamine cyanurate), Melapur MP (melamine phosphate) and Melapur 200 (melamine polyphosphate).
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Stand alone and synergiestic flame retardancy
The table below demonstrates the considerable advantages of Melapur flame retardants compared to other major flame retardant systems. While Melapur flame retardant is often used as a stand alone, it is also used regularly as an effective synergist with other flame retardants to improve the overall performance of the flame retardant system. Please talk to us for further information regarding these applications and the benefits of Melapur flame retardants in them.
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Melapur MC flame retardants
Melapur MC flame retardant is a salt of melamine and cyanuric acid. It has a higher thermal stability than pure melamine, remaining stable up to about 320ºC. For this reason, Melapur MC flame retardant is often applied in polymers with higher processing temperatures. Above 320ºC, it undergoes endothermic decomposition to melamine and cyanuric acid, acting as a heat sink in the process. The vaporized melamine acts as an inert gas source diluting the oxygen and the fuel gases present at the point of combustion. Examples of suitable polymers: all nitrogenbased polymers such as polyamide 66, 6, 11, 12, thermoplastic polyurethane and polyurethane
Melapur MP flame retardants
Melapur MP flame retardant is a salt of melamine and phosphoric acid. Above 200 ºC, it reacts to release water, resulting in a heat sink and leaving the phosphorous component available to react synergistically with other flame retardant components. Therefore, Melapur MP flame retardant is often used in blended flame retardant systems for applications, such as coatings and sealants.
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Melapur 200 flame retardants
Melapur 200 flame retardant decomposes endothermically above 350ºC, acting as a heat sink to cool the polymer. The released phosphoric acid further reacts with the polymer to form a char and inhibit the release of free radical gasses into the oxygen phase. Simultaneously, nitrogen species released from the degradation of melamine intumesces the char to further protect the polymer.
Melapur 200 flame retardant was originally developed to suit the high processing temperatures associated with the compounding of glass fiber reinforced thermoplastics. Over time, Melapur 200 flame retardants have also evolved into other applications, either replacing existing flame retardant systems, such as ammonium polyphosphate (APP) or permitting development of new formulations such as flame retardant epoxy resins or phenolic resins with improved flame retardancy
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Melapur flame retardants are highly effective due to their different burning behaviors
