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Flame retardant mechanism of flame retardant
2017-9-8 16:43:35
Flame retardant mechanism of flame retardant
Flame retardants are used in several mechanisms, such as endothermic action, coverage, inhibition of chain reaction, and smothering of gas. Most flame retardants are designed to achieve flame retardation by several mechanisms.
Flame retardant mechanism 1 absorbs heat. Any heat released by burning in a relatively short time is limited, if you can in a relatively short time to absorb part of the fire produced by heat, the flame temperature will reduce, and ACTS on the surface will have radiation to the gasification of combustible molecules into free radicals can reduce quantity of heat, combustion reaction will be a certain degree of inhibition. Under the condition of high temperature, strong endothermic reaction happened flame retardants, absorb part of heat released by burning, lower the temperature of the fuel surface, effectively inhibit the formation of combustible gas, to prevent the spread of combustion. The flame retardant mechanism of Al(OH)3 flame retardant is to increase the thermal capacity of the polymer to absorb more heat before the thermal decomposition temperature is reached, thus improving its flame retardant performance. This kind of flame retardant can give full play to the characteristics of the heat absorption when combined with water vapor, and improve its own flame retardant ability.
Fire retardant mechanism 2 coverage. In combustible material after adding flame retardant, flame retardant agent can form a glassy or stability at high temperature foam layer, isolated from O2, with insulation, oxygen, prevent flammable gas to escape, the effect of flame retardant and to achieve. If the flame retardant of organophosphorus is heated, it can produce crosslinked solid or carbonized layer that is more stable. On the one hand, the formation of carbonation prevents the polymer from further pyrolysis, and on the other hand, it can prevent the internal thermal decomposition from entering the gas phase to participate in the combustion process.
Flame retardant mechanism 3 inhibits chain reaction. According to the burning chain reaction theory, the free radicals are needed to sustain the combustion.
Flame retardants are used in several mechanisms, such as endothermic action, coverage, inhibition of chain reaction, and smothering of gas. Most flame retardants are designed to achieve flame retardation by several mechanisms.
Flame retardant mechanism 1 absorbs heat. Any heat released by burning in a relatively short time is limited, if you can in a relatively short time to absorb part of the fire produced by heat, the flame temperature will reduce, and ACTS on the surface will have radiation to the gasification of combustible molecules into free radicals can reduce quantity of heat, combustion reaction will be a certain degree of inhibition. Under the condition of high temperature, strong endothermic reaction happened flame retardants, absorb part of heat released by burning, lower the temperature of the fuel surface, effectively inhibit the formation of combustible gas, to prevent the spread of combustion. The flame retardant mechanism of Al(OH)3 flame retardant is to increase the thermal capacity of the polymer to absorb more heat before the thermal decomposition temperature is reached, thus improving its flame retardant performance. This kind of flame retardant can give full play to the characteristics of the heat absorption when combined with water vapor, and improve its own flame retardant ability.
Fire retardant mechanism 2 coverage. In combustible material after adding flame retardant, flame retardant agent can form a glassy or stability at high temperature foam layer, isolated from O2, with insulation, oxygen, prevent flammable gas to escape, the effect of flame retardant and to achieve. If the flame retardant of organophosphorus is heated, it can produce crosslinked solid or carbonized layer that is more stable. On the one hand, the formation of carbonation prevents the polymer from further pyrolysis, and on the other hand, it can prevent the internal thermal decomposition from entering the gas phase to participate in the combustion process.
Flame retardant mechanism 3 inhibits chain reaction. According to the burning chain reaction theory, the free radicals are needed to sustain the combustion.
Tris (2-Chloroethyl) Phosphate
Product Name: Trichloroethyl Phosphate Flame Retardant Plasticizer; Tris (β-Chloroethyl) Phosphate; Bis (2-Chloroethyl) Phosphate With 2-Chloroethyl Phosphate; Tris (β-Chloroethyl) Phosphoric Acid Ester; Tris (2-Chloroethyl) Phosphate; TCEP; Trichloroethyl Phosphate
CAS RN: 115-96-8
EINECS Number: 204-118-5
Molecular Formula: C6H12Cl3O4P
Molecular Weight: 285.4898
Tris (2-Chloroethyl) Phosphate use
1. Tris (2-Chloroethyl) Phosphate Has Excellent Flame Retardancy, Excellent Resistance To Low Temperature And UV Resistance, The Steam Can Only Be Used At 225 ℃ Above The Direct Ignition Can Be Fired, But The Fire The Source Is Immediately Self-Extinguishing. This Product Is A Flame Retardant Not Only Can Improve The Material Level Of Flame Retardant Materials, But Also Improve The Flame Resistance Of Water Resistance, Acid Resistance, Cold Resistance And Antistatic Properties. Commonly Used In Flame Retardant Nitrocellulose And Acetate Fiber As The Substrate Of Paint Coatings, Unsaturated Polyester, Polyurethane, Acrylic, Phenolic Resin, Can Also Be Used For Soft PVC Plastic Flame Retardant. This Product Is Used For The Amount Of Unsaturated Polyester 10% To 20%, In The Polyurethane Rigid Foam (Flame Retardant Polyether As Raw Material) Can Be About 10% In The Soft PVC Used As Auxiliary Plastic Flame Retardant When The 5% To 10%. Flame Retardants, Uranium, Thorium, Plutonium, Technetium And Other Rare Metal Separation Solvent Or Extractant.
2. This Product Is Widely Used In Chemical Fiber Fabrics, Cellulose Acetate As A Flame Retardant, In Addition To Self-Extinguishing, But Also Improve Water Resistance, Cold Resistance And Antistatic Properties. The General Amount Of 5 To 10 Copies. This Product Is An Excellent Flame Retardant For Synthetic Materials, And Has A Good Role In The Promotion, Widely Used In Cellulose Acetate, Nitrocellulose Varnish, Ethyl Cellulose, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane, Phenolic Resin , In Addition To Self-Extinguishing Products, But Also Improve The Physical Properties Of Products, Products Feel Soft, Also Known As Oil Additives And Rare Elements Of The Extractant, And Flame Retardant Rubber Conveyor Belt Is The Main Flame Retardant Materials , The General Amount Of Added 5% To 10%.
3. Used As Additive Type Halogenated Phosphate Flame Retardant And Plasticizer. Molecules In Both Phosphorus And Chlorine, Flame Retardant Effect Is Remarkable, Not Volatile And Hydrolysis, Good Stability To Ultraviolet Light. Applicable To Phenolic Resin, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane And So On. Also Used As Nitrocellulose Coating Flame Retardant, PVC Flame Retardant Plasticizer, Metal Extractant, Gasoline Additives And Polyimide Processing Aids And So On. Can Improve Water Resistance, Weatherability, Cold Resistance, Antistatic Property. Reference Dosage 5% To 20%.
Flame retardant can be applied to the gas phase combustion zone, capture the combustion reaction of free radicals, preventing the spread of flame, make the flame burning area density decreased, eventually make the combustion reaction speed down until the end. Such as halogen flame retardants, the evaporation temperature and the polymer decomposition temperature are the same or similar. When the polymer is heated, the flame retardants also evaporate. As containing halogen flame retardant with thermal decomposition product at the same time in the gas phase combustion zone, halogen can capture the combustion reaction of free radicals, preventing the spread of flame, make the flame burning area density decreased, eventually make the combustion reaction speed down until the end.
Flame retardant fire retardant mechanism 4. When the flame retardant is heated, the non-flammable gas can be decomposed, and the concentration of combustible gas that can be decomposed can be diluted down to the lower limit of combustion. At the same time, the concentration of oxygen in the combustion zone has the effect of diluting the combustion.
Aluminum hydroxide crystallization water in 205 ~ 230 ℃ under thermal decomposition, absorb a lot of heat, the water vapor burn rate reduces the polymer surface, dilute the O2 and reduce the concentration of the combustible gas and achieve the purpose of flame retardant [3]. New refractory metal oxide (Al2O3) has high activity, it will catalytic polymer thermal crosslinking reaction, oxygen in the form a layer on the surface of polymer membrane, carbide carbide film will weaken when combustion, heat transfer, mass transfer effect so as to have the effect of flame retardant. In addition, the oxides can also absorb smoke and dust particles and act as a smoke - suppression effect. The flame retardant also has the effect of blocking saliva drop, promoting carbonization, not volatilization, not seeping, which can be kept in the polymer for a long time.
Aluminum hydroxide is widely used in flame retardant modification of PP, PE, EVA and other polyolefins, especially in wire and cable industry. For the high requirements for flame retardant performance of materials, in order to meet the requirements of flame retardant, must fill in polymer composites a large number of aluminum hydroxide (50% ~ 60%) this will leads to the deterioration of the physical and mechanical properties of composite materials.
Considering that the flame retardant effect is controlled by chemical reaction, the smaller the particle size of the flame retardant, the better the flame retardant effect is. With the decrease of the particle size of the hydroxide, the oxygen index increases rapidly in the same addition, and the more difficult the material is to burn. Ultrafine and nanometer is a major research development direction.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Product Name: Trichloroethyl Phosphate Flame Retardant Plasticizer; Tris (β-Chloroethyl) Phosphate; Bis (2-Chloroethyl) Phosphate With 2-Chloroethyl Phosphate; Tris (β-Chloroethyl) Phosphoric Acid Ester; Tris (2-Chloroethyl) Phosphate; TCEP; Trichloroethyl Phosphate
CAS RN: 115-96-8
EINECS Number: 204-118-5
Molecular Formula: C6H12Cl3O4P
Molecular Weight: 285.4898
Tris (2-Chloroethyl) Phosphate use
1. Tris (2-Chloroethyl) Phosphate Has Excellent Flame Retardancy, Excellent Resistance To Low Temperature And UV Resistance, The Steam Can Only Be Used At 225 ℃ Above The Direct Ignition Can Be Fired, But The Fire The Source Is Immediately Self-Extinguishing. This Product Is A Flame Retardant Not Only Can Improve The Material Level Of Flame Retardant Materials, But Also Improve The Flame Resistance Of Water Resistance, Acid Resistance, Cold Resistance And Antistatic Properties. Commonly Used In Flame Retardant Nitrocellulose And Acetate Fiber As The Substrate Of Paint Coatings, Unsaturated Polyester, Polyurethane, Acrylic, Phenolic Resin, Can Also Be Used For Soft PVC Plastic Flame Retardant. This Product Is Used For The Amount Of Unsaturated Polyester 10% To 20%, In The Polyurethane Rigid Foam (Flame Retardant Polyether As Raw Material) Can Be About 10% In The Soft PVC Used As Auxiliary Plastic Flame Retardant When The 5% To 10%. Flame Retardants, Uranium, Thorium, Plutonium, Technetium And Other Rare Metal Separation Solvent Or Extractant.
2. This Product Is Widely Used In Chemical Fiber Fabrics, Cellulose Acetate As A Flame Retardant, In Addition To Self-Extinguishing, But Also Improve Water Resistance, Cold Resistance And Antistatic Properties. The General Amount Of 5 To 10 Copies. This Product Is An Excellent Flame Retardant For Synthetic Materials, And Has A Good Role In The Promotion, Widely Used In Cellulose Acetate, Nitrocellulose Varnish, Ethyl Cellulose, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane, Phenolic Resin , In Addition To Self-Extinguishing Products, But Also Improve The Physical Properties Of Products, Products Feel Soft, Also Known As Oil Additives And Rare Elements Of The Extractant, And Flame Retardant Rubber Conveyor Belt Is The Main Flame Retardant Materials , The General Amount Of Added 5% To 10%.
3. Used As Additive Type Halogenated Phosphate Flame Retardant And Plasticizer. Molecules In Both Phosphorus And Chlorine, Flame Retardant Effect Is Remarkable, Not Volatile And Hydrolysis, Good Stability To Ultraviolet Light. Applicable To Phenolic Resin, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane And So On. Also Used As Nitrocellulose Coating Flame Retardant, PVC Flame Retardant Plasticizer, Metal Extractant, Gasoline Additives And Polyimide Processing Aids And So On. Can Improve Water Resistance, Weatherability, Cold Resistance, Antistatic Property. Reference Dosage 5% To 20%.
Flame retardant can be applied to the gas phase combustion zone, capture the combustion reaction of free radicals, preventing the spread of flame, make the flame burning area density decreased, eventually make the combustion reaction speed down until the end. Such as halogen flame retardants, the evaporation temperature and the polymer decomposition temperature are the same or similar. When the polymer is heated, the flame retardants also evaporate. As containing halogen flame retardant with thermal decomposition product at the same time in the gas phase combustion zone, halogen can capture the combustion reaction of free radicals, preventing the spread of flame, make the flame burning area density decreased, eventually make the combustion reaction speed down until the end.
Flame retardant fire retardant mechanism 4. When the flame retardant is heated, the non-flammable gas can be decomposed, and the concentration of combustible gas that can be decomposed can be diluted down to the lower limit of combustion. At the same time, the concentration of oxygen in the combustion zone has the effect of diluting the combustion.
Aluminum hydroxide crystallization water in 205 ~ 230 ℃ under thermal decomposition, absorb a lot of heat, the water vapor burn rate reduces the polymer surface, dilute the O2 and reduce the concentration of the combustible gas and achieve the purpose of flame retardant [3]. New refractory metal oxide (Al2O3) has high activity, it will catalytic polymer thermal crosslinking reaction, oxygen in the form a layer on the surface of polymer membrane, carbide carbide film will weaken when combustion, heat transfer, mass transfer effect so as to have the effect of flame retardant. In addition, the oxides can also absorb smoke and dust particles and act as a smoke - suppression effect. The flame retardant also has the effect of blocking saliva drop, promoting carbonization, not volatilization, not seeping, which can be kept in the polymer for a long time.
Aluminum hydroxide is widely used in flame retardant modification of PP, PE, EVA and other polyolefins, especially in wire and cable industry. For the high requirements for flame retardant performance of materials, in order to meet the requirements of flame retardant, must fill in polymer composites a large number of aluminum hydroxide (50% ~ 60%) this will leads to the deterioration of the physical and mechanical properties of composite materials.
Considering that the flame retardant effect is controlled by chemical reaction, the smaller the particle size of the flame retardant, the better the flame retardant effect is. With the decrease of the particle size of the hydroxide, the oxygen index increases rapidly in the same addition, and the more difficult the material is to burn. Ultrafine and nanometer is a major research development direction.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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