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Flame retardant additives for polyolefins
2017-11-18 11:26:47
Flame retardant additives for polyolefins
At present, there are many kinds of polyolefin flame retardant additives. According to different classification standards, polyolefin flame retardant additives can be divided into the following categories:
(1) in accordance with the flame retardant elements can be divided into flame retardant polyolefin of halogen, phosphorus, phosphorus and nitrogen, silicon, antimony, boron and aluminum magnesium and other polyolefin flame retardant additives, wherein the halogen flame retardant polyolefin flame retardant additive is currently the world's largest production of additive add, has the characteristics ofless amount, flame retardant effect significantly, which occupies an important position in the field of flame retardant.
(2) according to the different components of polyolefin flame retardant additives, polyolefin flame retardant additives can be divided into inorganic salts, polyolefin flame retardant additives, organic polyolefin flame retardant additives and organic and inorganic mixed polyolefin flame retardant additives three kinds. The inorganic flame retardant additives is a halogen-free flame retardant polyolefin additives, has high safety, anti smoke, non-toxic, cheap and other advantages, including water and inorganic metal compounds, antimony flame retardant additives, silicon flame retardant additives, inorganic phosphorus flame retardant additives and expandable graphite; mainly include organic flame retardant halogen flame retardant polyolefin additives, phosphorous flame retardant additives, the flame retardant polyolefin additives have different characteristics because of different flame retardant elements.
(3) according to the use of polyolefin flame retardant additives and the existing form of polymers, they can be divided into two types: adding type and reactive type. The addition type is mainly inorganic inorganic flame retardant additives, and the reaction type is mainly organic polyolefin flame retardant additives.
Basic principle of flame retardant of polyolefin flame retardant additives. Combustion reactions are generally combustible, oxygen and a certain temperature of the three elements, and are indispensable. The action mechanism of polyolefin flame retardant additives should be controlled when one or more factors are produced in the combustion of materials, so as to prevent or slow down the combustion.
Flame retardant mechanism of each kind of flame retardant additives concrete is different, but the basic principle of flame retardant is roughly the same, combustible gas to reduce the thermal decomposition process of the formation and hinder basic gas combustion reaction process, absorption of heat in the combustion field, dilution and isolation of the air, also have certain effect to stop burning. The flame retardancy of polyolefin flame retardant additives includes the following main processes.
Some flame retardant additives in the heating process, its compounds containing flame retardant elements will endothermic dehydration and phase decomposition, as well as other endothermic reaction, reduce the temperature of the combustion area and the polymer surface, thus slowing down the speed of thermal decomposition of polymers to be flame retardant.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
CAS No.:13674-87-8
HS: 29199000
Tax Rate (%): 9%
Tris (1,3-Dichloro-2-Propyl) Phosphate (TDCPP) Raw Materials: Phosphorus Oxychloride, Epichlorohydrin
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
In the process of combustion, a large amount of combustible gas will be produced, such as carbon monoxide. The existence of polyolefin flame retardant additives, can produce a large number of non flammable gas, effective dilution of flammable gas or air, so as to achieve the flame retardant effect of materials.
Some flame retardant materials (such as phosphoric acid, boric acid) melt when heating, forming a glassy film on the surface of the material, hindering the supply of oxygen, while it can play a role in heat insulation and reduce the release of combustible gases, resulting in flame retardant effect.
In the process of polymer combustion, a large number of free radicals accelerate the combustion reaction. If you try to capture and eliminate these radicals, you can control the combustion, play a flame retardant effect. The rate of gas-phase combustion reaction is closely related to the concentration of free radicals HO and H in the combustion process.
The effect of flame retardant additives for gas to olefins is to transform such high energy free radicals into stable free radicals, inhibit combustion process, and achieve the purpose of flame retardant. Free radicals interact with dust particles and may lose their activity. The following reactions can occur on the surface of dust particles: H? +O2? -HO2. A large amount of free radicals HO2, such as H, HO, etc. are generated on the surface of dust particles, so as to achieve the purpose of inhibiting combustion.
In general, polyolefin flame retardant additives mainly through endothermic cooling, dilution, formation of heat insulation layer and termination of free radical chain reaction and other ways to achieve the flame retardant material, the first three are physical effects, the latter is a chemical effect. The physical effects are endothermic, dilute combustible materials and isolated air, etc. the chemical effects are carbonization, elimination of free radicals and the action of phosphorus.
Inorganic hydrated metal compounds mainly include magnesium hydroxide [Mg (OH) 2], aluminum hydroxide [Al (OH) 3], hydrotalcite [Mg6Al2 (OH) 16CO3? 4H2O], calcium aluminate [3CaO? Al2O3? 6H2O], etc.. This kind of material has the advantages of good thermal stability, flame retardancy, non-toxic, non volatile, no corrosive gas, small amount of smoke, no two pollution, etc..
Aluminum hydroxide (ATH) is one of the earliest inorganic polyolefin flame retardant additives. It is also one of the largest amount of polyolefin flame retardant additives in the world. The flame retardant mechanism: aluminium hydroxide added to the polymer, reducing combustible polymer concentration; the beginning of dehydration, at 250 degrees Celsius heat, inhibit the decomposition of the polymer temperature; water vapor dilution of the combustible gas and oxygen concentration, can prevent combustion; the combustible surfaces can prevent combustion Al2O3.
But ATH has a large amount of added defects, usually need to add more than 50% to show good flame retardant effect. The flame retardant mechanism of magnesium hydroxide is similar to that of ATH. Compared with ATH, its thermal stability and smoke suppression performance are better than that of ATH.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
At present, there are many kinds of polyolefin flame retardant additives. According to different classification standards, polyolefin flame retardant additives can be divided into the following categories:
(1) in accordance with the flame retardant elements can be divided into flame retardant polyolefin of halogen, phosphorus, phosphorus and nitrogen, silicon, antimony, boron and aluminum magnesium and other polyolefin flame retardant additives, wherein the halogen flame retardant polyolefin flame retardant additive is currently the world's largest production of additive add, has the characteristics ofless amount, flame retardant effect significantly, which occupies an important position in the field of flame retardant.
(2) according to the different components of polyolefin flame retardant additives, polyolefin flame retardant additives can be divided into inorganic salts, polyolefin flame retardant additives, organic polyolefin flame retardant additives and organic and inorganic mixed polyolefin flame retardant additives three kinds. The inorganic flame retardant additives is a halogen-free flame retardant polyolefin additives, has high safety, anti smoke, non-toxic, cheap and other advantages, including water and inorganic metal compounds, antimony flame retardant additives, silicon flame retardant additives, inorganic phosphorus flame retardant additives and expandable graphite; mainly include organic flame retardant halogen flame retardant polyolefin additives, phosphorous flame retardant additives, the flame retardant polyolefin additives have different characteristics because of different flame retardant elements.
(3) according to the use of polyolefin flame retardant additives and the existing form of polymers, they can be divided into two types: adding type and reactive type. The addition type is mainly inorganic inorganic flame retardant additives, and the reaction type is mainly organic polyolefin flame retardant additives.
Basic principle of flame retardant of polyolefin flame retardant additives. Combustion reactions are generally combustible, oxygen and a certain temperature of the three elements, and are indispensable. The action mechanism of polyolefin flame retardant additives should be controlled when one or more factors are produced in the combustion of materials, so as to prevent or slow down the combustion.
Flame retardant mechanism of each kind of flame retardant additives concrete is different, but the basic principle of flame retardant is roughly the same, combustible gas to reduce the thermal decomposition process of the formation and hinder basic gas combustion reaction process, absorption of heat in the combustion field, dilution and isolation of the air, also have certain effect to stop burning. The flame retardancy of polyolefin flame retardant additives includes the following main processes.
Some flame retardant additives in the heating process, its compounds containing flame retardant elements will endothermic dehydration and phase decomposition, as well as other endothermic reaction, reduce the temperature of the combustion area and the polymer surface, thus slowing down the speed of thermal decomposition of polymers to be flame retardant.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
CAS No.:13674-87-8
HS: 29199000
Tax Rate (%): 9%
Tris (1,3-Dichloro-2-Propyl) Phosphate (TDCPP) Raw Materials: Phosphorus Oxychloride, Epichlorohydrin
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
In the process of combustion, a large amount of combustible gas will be produced, such as carbon monoxide. The existence of polyolefin flame retardant additives, can produce a large number of non flammable gas, effective dilution of flammable gas or air, so as to achieve the flame retardant effect of materials.
Some flame retardant materials (such as phosphoric acid, boric acid) melt when heating, forming a glassy film on the surface of the material, hindering the supply of oxygen, while it can play a role in heat insulation and reduce the release of combustible gases, resulting in flame retardant effect.
In the process of polymer combustion, a large number of free radicals accelerate the combustion reaction. If you try to capture and eliminate these radicals, you can control the combustion, play a flame retardant effect. The rate of gas-phase combustion reaction is closely related to the concentration of free radicals HO and H in the combustion process.
The effect of flame retardant additives for gas to olefins is to transform such high energy free radicals into stable free radicals, inhibit combustion process, and achieve the purpose of flame retardant. Free radicals interact with dust particles and may lose their activity. The following reactions can occur on the surface of dust particles: H? +O2? -HO2. A large amount of free radicals HO2, such as H, HO, etc. are generated on the surface of dust particles, so as to achieve the purpose of inhibiting combustion.
In general, polyolefin flame retardant additives mainly through endothermic cooling, dilution, formation of heat insulation layer and termination of free radical chain reaction and other ways to achieve the flame retardant material, the first three are physical effects, the latter is a chemical effect. The physical effects are endothermic, dilute combustible materials and isolated air, etc. the chemical effects are carbonization, elimination of free radicals and the action of phosphorus.
Inorganic hydrated metal compounds mainly include magnesium hydroxide [Mg (OH) 2], aluminum hydroxide [Al (OH) 3], hydrotalcite [Mg6Al2 (OH) 16CO3? 4H2O], calcium aluminate [3CaO? Al2O3? 6H2O], etc.. This kind of material has the advantages of good thermal stability, flame retardancy, non-toxic, non volatile, no corrosive gas, small amount of smoke, no two pollution, etc..
Aluminum hydroxide (ATH) is one of the earliest inorganic polyolefin flame retardant additives. It is also one of the largest amount of polyolefin flame retardant additives in the world. The flame retardant mechanism: aluminium hydroxide added to the polymer, reducing combustible polymer concentration; the beginning of dehydration, at 250 degrees Celsius heat, inhibit the decomposition of the polymer temperature; water vapor dilution of the combustible gas and oxygen concentration, can prevent combustion; the combustible surfaces can prevent combustion Al2O3.
But ATH has a large amount of added defects, usually need to add more than 50% to show good flame retardant effect. The flame retardant mechanism of magnesium hydroxide is similar to that of ATH. Compared with ATH, its thermal stability and smoke suppression performance are better than that of ATH.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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