News Details
Inorganic flame retardants for PE
2017-11-20 11:39:03
Inorganic flame retardants for PE (polyethylene) is a high temperature resistant solution, which is made up of superfine inorganic metal oxide. PE (polyethylene) with inorganic flame retardant is the main inorganic elements has inherent flame retardancy to elements or compounds added to the substrate to be flame retardant, physical dispersion of polymer and fully mixed in the gas phase or condensed phase by chemical or physical changes to flame retardant effect.
In order to study the main elements of the development of flame retardant wood metal Mg, Al, Ca, B, Si, non metal N, P, Sb, halogen and transition elements Mo, V, Fe, PE (polyethylene) with inorganic flame retardants mainly include metal hydrate, red phosphorus, boron compounds, antimony compounds. PE (polyethylene) with inorganic flame retardant has the characteristics of good thermal stability, non volatile, lasting effect, cheap price, widely used.
PE (polyethylene) inorganic flame retardant aluminum hydroxide (ATH) flame retardant, with non-toxic, good stability, high temperature does not produce toxic gas, but also reduce the amount of smoke burning plastic combustion advantages, and low price, wide range of sources. The temperature of dehydration and absorption of aluminum hydroxide is low, about 235~350 degrees centigrade, so the flame retardant effect is obvious when the plastic starts burning.
When the addition amount of ATH is 40%, the thermal decomposition temperature of PE (PE), PP (PP), PVC (PVC) and ABS (acrylonitrile / butadiene / styrene copolymer) can be significantly reduced, and the effect of flame retardancy and smoke reduction can be reduced. Adding 50% aluminum hydroxide polyolefin in Japan is mainly used to make food packaging materials, adding 60% aluminum hydroxide flame retardant polyolefin can be used as building materials and automobiles, ships interior decoration materials.
The main problem of common aluminum hydroxide flame retardant is the large amount of filler needed, otherwise there is no good flame retardant effect, but the large amount of filling will inevitably lead to poor fluidity of the material during mixing and molding of the resin, and affect the processing performance and mechanical properties of the material. Aluminum hydroxide particles can also improve the compatibility with resin after surface treatment, so they are suitable for PE, PP, EVA (ethylene / vinyl acetate copolymer) and high temperature engineering plastics PBT (polybutylene terephthalate) and PA (nylon).
Magnesium hydroxide (MDH) flame retardant has good flame retardant effect, but also can reduce the amount of smoke burning in the plastic combustion, and play the role of smoke suppressant. Magnesium hydroxide also has the advantages of safety, non-toxic, high temperature processing and other advantages of good thermal stability. The magnesium hydroxide filled plastic material has bright and clean surface, and its color is beautiful. When the magnesium hydroxide flame retardant is used in PP plastics, the flame retardant effect is good when the dosage is 50%.
Triphenyl Phosphate (TPP)
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
When adding appropriate amount of magnesium hydroxide or PP material, it is effective smoke suppression filler. However, the decomposition temperature of magnesium hydroxide is higher, and the heat absorption is less at 340~490 centigrade. Therefore, the effect of inhibiting the temperature rise of the material is worse than that of aluminum hydroxide, and the carbonization flame retardancy of the polymer is better than that of aluminum hydroxide. Therefore, both of them are used together and complement each other, and their flame retardant effect is better than that of single use.
Magnesium hydroxide flame retardants also need to fill a large amount of shortcomings, a large number of magnesium hydroxide flame retardant will reduce the strength of plastic products and other properties. Secondly, the acid resistance of magnesium hydroxide is poor, it will dissolve quickly in acid, and also easily affected by lactic acid, leaving fingerprints on the surface of the product.
Ultra fine technology and surface treatment technology have been used to improve the properties of magnesium hydroxide flame retardant, and a series of new products with high quality and efficiency have been developed.
Red is a very good PE (polyethylene) with inorganic flame retardant, and aluminum hydroxide / magnesium hydroxide flame retardant in common flame retardant synergist. Red phosphorus flame retardant high efficiency, less dosage, low smoke, low toxicity, has a very wide range. In particular, the flame retardant effect of oxygen containing polymers is good, and the flame retardancy of PE and PP plastics is slightly worse. But when used with magnesium hydroxide and aluminum hydroxide flame retardant, synergistic effect can be produced and good flame retardant effect is obtained.
Ordinary red phosphorus flame retardant moisture absorption, easy coloring, friction and collision when explosive faults have developed particles with microencapsulated red phosphorus flame retardant, it is coated with a layer of red phosphorus particles in the membrane and making capsules, the capsules won't burst in the process, but the plastic material is on fire, the film can immediately dissolve and release so as to achieve the purpose of flame retardant flame retardant. So the new red phosphorus flame retardant to overcome the above shortcomings, and the effect of flame retardant and ordinary red phosphorus flame retardant is basically the same. Microencapsulation method also improves the dispersion properties of red phosphorus in resin.
The flame retardant mechanism of metal hydrate is that the crystal water is released when heated. This is a strong endothermic reaction, heat absorption, can play a role in cooling the polymer, and water vapor generated in the reaction can dilute combustible gas, combustion suppression spread, refractory metal oxide and the new (Al2O3, MgO) has higher activity, it will be hot oxygen crosslinking reaction catalyzed polymerization material, forming a on the surface of polymer film layer carbonization, carbonized film will weaken the heat transfer and mass transfer effect during combustion, which plays the role of flame retardant.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
In order to study the main elements of the development of flame retardant wood metal Mg, Al, Ca, B, Si, non metal N, P, Sb, halogen and transition elements Mo, V, Fe, PE (polyethylene) with inorganic flame retardants mainly include metal hydrate, red phosphorus, boron compounds, antimony compounds. PE (polyethylene) with inorganic flame retardant has the characteristics of good thermal stability, non volatile, lasting effect, cheap price, widely used.
PE (polyethylene) inorganic flame retardant aluminum hydroxide (ATH) flame retardant, with non-toxic, good stability, high temperature does not produce toxic gas, but also reduce the amount of smoke burning plastic combustion advantages, and low price, wide range of sources. The temperature of dehydration and absorption of aluminum hydroxide is low, about 235~350 degrees centigrade, so the flame retardant effect is obvious when the plastic starts burning.
When the addition amount of ATH is 40%, the thermal decomposition temperature of PE (PE), PP (PP), PVC (PVC) and ABS (acrylonitrile / butadiene / styrene copolymer) can be significantly reduced, and the effect of flame retardancy and smoke reduction can be reduced. Adding 50% aluminum hydroxide polyolefin in Japan is mainly used to make food packaging materials, adding 60% aluminum hydroxide flame retardant polyolefin can be used as building materials and automobiles, ships interior decoration materials.
The main problem of common aluminum hydroxide flame retardant is the large amount of filler needed, otherwise there is no good flame retardant effect, but the large amount of filling will inevitably lead to poor fluidity of the material during mixing and molding of the resin, and affect the processing performance and mechanical properties of the material. Aluminum hydroxide particles can also improve the compatibility with resin after surface treatment, so they are suitable for PE, PP, EVA (ethylene / vinyl acetate copolymer) and high temperature engineering plastics PBT (polybutylene terephthalate) and PA (nylon).
Magnesium hydroxide (MDH) flame retardant has good flame retardant effect, but also can reduce the amount of smoke burning in the plastic combustion, and play the role of smoke suppressant. Magnesium hydroxide also has the advantages of safety, non-toxic, high temperature processing and other advantages of good thermal stability. The magnesium hydroxide filled plastic material has bright and clean surface, and its color is beautiful. When the magnesium hydroxide flame retardant is used in PP plastics, the flame retardant effect is good when the dosage is 50%.
Triphenyl Phosphate (TPP)
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
When adding appropriate amount of magnesium hydroxide or PP material, it is effective smoke suppression filler. However, the decomposition temperature of magnesium hydroxide is higher, and the heat absorption is less at 340~490 centigrade. Therefore, the effect of inhibiting the temperature rise of the material is worse than that of aluminum hydroxide, and the carbonization flame retardancy of the polymer is better than that of aluminum hydroxide. Therefore, both of them are used together and complement each other, and their flame retardant effect is better than that of single use.
Magnesium hydroxide flame retardants also need to fill a large amount of shortcomings, a large number of magnesium hydroxide flame retardant will reduce the strength of plastic products and other properties. Secondly, the acid resistance of magnesium hydroxide is poor, it will dissolve quickly in acid, and also easily affected by lactic acid, leaving fingerprints on the surface of the product.
Ultra fine technology and surface treatment technology have been used to improve the properties of magnesium hydroxide flame retardant, and a series of new products with high quality and efficiency have been developed.
Red is a very good PE (polyethylene) with inorganic flame retardant, and aluminum hydroxide / magnesium hydroxide flame retardant in common flame retardant synergist. Red phosphorus flame retardant high efficiency, less dosage, low smoke, low toxicity, has a very wide range. In particular, the flame retardant effect of oxygen containing polymers is good, and the flame retardancy of PE and PP plastics is slightly worse. But when used with magnesium hydroxide and aluminum hydroxide flame retardant, synergistic effect can be produced and good flame retardant effect is obtained.
Ordinary red phosphorus flame retardant moisture absorption, easy coloring, friction and collision when explosive faults have developed particles with microencapsulated red phosphorus flame retardant, it is coated with a layer of red phosphorus particles in the membrane and making capsules, the capsules won't burst in the process, but the plastic material is on fire, the film can immediately dissolve and release so as to achieve the purpose of flame retardant flame retardant. So the new red phosphorus flame retardant to overcome the above shortcomings, and the effect of flame retardant and ordinary red phosphorus flame retardant is basically the same. Microencapsulation method also improves the dispersion properties of red phosphorus in resin.
The flame retardant mechanism of metal hydrate is that the crystal water is released when heated. This is a strong endothermic reaction, heat absorption, can play a role in cooling the polymer, and water vapor generated in the reaction can dilute combustible gas, combustion suppression spread, refractory metal oxide and the new (Al2O3, MgO) has higher activity, it will be hot oxygen crosslinking reaction catalyzed polymerization material, forming a on the surface of polymer film layer carbonization, carbonized film will weaken the heat transfer and mass transfer effect during combustion, which plays the role of flame retardant.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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