What are the developments in the application of PP flame retardants?
Halogen-antimony system, namely gas phase flame retardant mechanism. Commonly used halogen flame retardants are decabromodiphenyl ether, hexabromocyclododecane, octabromo ether, tetrabromobisphenol A, etc., plus flame retardant synergistic agent antimony trioxide, with a small amount of addition, good flame retardant effect. PP is treated with a bromoalkyl-containing phosphate ester. This kind of flame retardant has P-Br synergistic effect, so that the flame retardant effect is significant, but also can improve the rheology and processing performance of PP, the physical and mechanical properties of PP is also small. In recent years, in PP flame retardant technology, the intumescent flame retardant pioneered by Camino, a professor at the University of Turin, Italy, has played a huge role.
Halogen-antimony system, namely gas phase flame retardant mechanism. Commonly used halogen systemflame retardantIt is decabromodiphenyl ether, hexabromocyclododecane, octabromo ether, tetrabromobisphenol A, etc., plus the flame retardant synergistic agent antimony trioxide, which has the characteristics of small addition amount and good flame retardant effect.
PP is treated with a bromoalkyl-containing phosphate ester. This kind of flame retardant has P-Br synergistic effect, so that the flame retardant effect is significant, but also can improve the rheology and processing performance of PP, the physical and mechanical properties of PP is also small.
In recent years, the intumescent flame retardant initiated by Camino, a professor at the University of Turin, Italy, has played a huge role in PP flame retardant technology. This kind of P-N flame retardant has high efficiency, high heat and light stability, low toxicity, low smoke, low corrosion, small impact on processing and mechanical properties, and will not cause environmental pollution. In PP as long as the addition of 25-30phr can achieve UL94 V-0 level.
The addition amount in PE should reach 30-35phr, which can reach UL94 V-0 grade. At present, there are many halogen-free polyolefin flame retardants that have been commercialized in China. I believe that with the competition in the market, the grade of products will definitely be greatly improved!
Graft copolymer of pentabromobenzyl acrylate with ethylene-propylene-diene rubber flame retardant polypropylene. This kind of flame retardant treatment of PP has a high impact strength, in some cases can be used as engineering plastics.
Inorganic filler flame retardant polypropylene, the so-called inorganic filler refers to aluminum hydroxide and magnesium hydroxide, they have flame retardant, smoke suppression effect. But to achieve the desired effect, microparticulation and surface treatment is the key technology, applied to different plastics. The matching surfactant should be carefully selected to make it compatible with the plastic and uniformly dispersed in the plastic without too much influence on the mechanical properties of the plastic.
Because ATH and magnesium hydroxide can play a flame retardant and smoke suppression effect in different temperature ranges, the combination of the two can make the plastic continue to play a flame retardant effect in a wide temperature range. In the treatment of PP with magnesium hydroxide, in order to achieve better flame retardant effect and appropriate mechanical properties, in the mixing process of adding magnesium hydroxide, it is appropriate to use two-step feeding method, which will get better results than one-time feeding.
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Zhongke Flame Retardant Organization Watches 20 Closing Ceremonies
On the morning of October 22, 2022, members of Zhongke Flame Retardant New Materials Co., Ltd. watched the closing ceremony of the 20th Congress under the leadership of General Manager Wang Ligui.
Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.
As a flame retardant, magnesium hydroxide also need to improve what aspects?
When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.
Hefei Zhongke Flame Retardant New Material Co., Ltd
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