Chem. Group: Phosphinates
Supply Form: white powder
Chemical Name: aluminium Hydroxymethylphenylphosphinate
FRPAA is a non-halogenated flame retardant based on organic phosphinates. The product achieves its flame retardant effect through intumescence. The thermoplastic material foams and crosslinks on exposure to flame and forms a stable char at the surface acting as a barrier. The protective layer provides a heat-insulation effect, reduces oxygen access and prevents dripping of molten polymer.
Delivery Specification and Technical Data
Phosphorus %(w/w) 16.2-18.1%
Water / Moisture %(by wt.) max. 0.5
Density g/cm³ approx. 1.42 at 20 oC
Bulk Density kg/m³ approx. 400
Decomposition Temperature oC > 340 (DTA/TG)
1.The product is constantly monitored to ensure that it adheres to the specified values.
2.The technical data are used solely to describe the product and are not subject to constant monitoring
FRPAA was developed especially for use in polyamides. It is suited for both glass-fibre-reinforced and unreinforced grades. The flame retarded polyamide compounds exhibit very good physical and electrical properties.
In glass-fiber-reinforced polyamide 6 or 6.6, a dosage of 12 to 18 % (by wt.) FRPAA is usually sufficient to obtain the UL 94 V-0 classification for electrical components (at 1.6 as well as 0.8 mm thickness). Subject to the polymer grade, processing conditions and glass- fibre reinforcement the dosage of the flame retardant may vary.
Before incorporating FRPAA, it is important to predry the polyamide as usual. If possible, the resulting moisture content should be below 0.1 % (bywt.). Predrying of FRPAA is not necessary. However, predrying(e.g. 4 h at 120 oC ) is recommended, if even very low moisture contents must be avoided. The mixing and processing methods customary in powder processing of polymers can be used with FRPAA. The optimum conditions for incorporating should be determined in each individual case. Care must be taken to ensure homogeneous dispersion of all components. The temperature of the polymer melt should not exceed 320 oC .
The FRPAA can also work as starting materials for the preparation of flame retardants for thermosetting resins, such as unsaturated polyester resins, epoxy resins, polyurethanes or acrylates or as starting materials for the preparation of flame retardants for thermoplastic polymers, such as polyethylene terephthalate, polybutylene terephthalate.
Packing: 25Kgs in barrel