产品介绍

全球无卤阻燃剂巨头德国科莱恩公司新推出专用于聚烯烃体系的高效膨胀型无卤阻燃剂Exolit®AP766。该新产品充分结合了科莱恩公司优良业内并独享的“高聚合度、高纯度、100% 晶形II、精细微胶囊化包覆及协效改性”等多项显著技术优势。
 
Exolit®AP766可应用于PP、PE、PP共聚物、PP共混物的注塑及挤出制件的无卤阻燃改性（包括无卤阻燃PP薄片等）。
 
Exolit®AP766也可以应用于玻纤增强聚丙烯体系的无卤阻燃。
 
相比Exolit®AP760等，Exolit®AP766的热稳定性更为出色（Td> 275ºC)、加工窗口更宽、抗水性更好、阻燃效率更高。达到UL 94 V-0/1.6mm, 所需添加量明显减少，从而综合物性得以更好地保持与改善。

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.

BENEFITS
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
processing window

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.