型號： Exolit AP766
相比Exolit®AP760等，Exolit®AP766的熱穩定性更為出色（Td> 275ºC)、加工窗口更寬、抗水性更好、阻燃效率更高。達到UL 94 V-0/1.6mm, 所需添加量明顯減少，從而綜合物性得以更好地保持與改善。
Exolit AP 766 (TP) is a non-halogenated flame retardant based on phosphorus and nitrogen synergism. 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.
Non-halogenated flame retardant based on ammonium polyphosphate, which develops its
effectiveness through phosphorus/nitrogen synergism
Non-halogenated flame retardant with favorable environmental and health profile
When incorporated into thermoplastics, it exhibits high processing stability
Differs in its mode of action from chlorine- or bromine-containing flame retardants by
achieving its effect through intumescence
May be used in polypropylene, PP-copolymers and PP-blends
Compared to Exolit® AP 750, it shows an improved thermal stability, which allows a larger
The mixing and processing methods customary in powder processing of polymers can be used with Exolit AP 760. The VDI Guideline 2263 ”Prevention of dust fires and dust
explosions” (German regulation) or the relevant national regulations must be observed.
The optimum mixing conditions for incorporating theproduct should be determined individually in each case. Care should be taken to ensure good, homogeneous distribution of all components.
Both single- and twin-screw extruders are suitable for incorporating the product. During processing, the melt temperature should not exceed 250°C.
In this context local peak temperatures have to be considered. Temperatures above the maximum processing temperature cause formation of decomposition products which emissions could exceed authorized legal threshold values. Further information on feasible decomposition products are listed in the material safety data sheet. To prevent degradation effects through the introduction of shear energy, it has proved an advantage to use machines of less shear-intensive design. When a water bath is used in pelletization, it is advisable to restrict the addition of Exolit AP 760 to less than 40 % (w/w) to minimize entrainment of water by the polymer strands. It has been found that with higher additions (masterbatch production), the water is clouded by extracted flame retardant and a relatively large amount of water is entrained. Generally speaking, it is advisable - even with low flame retardant additions - to keep the passage through the water bath as short as possible to permit optimum evaporation of any entrained water. In some cases, depending on production conditions, it may be necessary to dry the granules obtained.