News Details
Polyethylene flame retardant
2017-9-5 16:57:30
Polyethylene flame retardant
Polyethylene (PE) is one of the largest thermoplastic wide usage, dosage, its products have a wide range of USES, can produce all kinds of articles for daily use not only, still can make a cold storage parts, electric parts, tube, film and other industrial products. In 1992-1998, China's PE developed rapidly, with annual output growth rate of 11.55%. By 2001, the global plan will add more than 10Mt of PE capacity, and China's PE production capacity will also increase substantially, and the PE production will be around 3Mt by 2000.
Most polymers such as polyethylene are easy burning, burning flares up not only, but also sends out a toxic gas and smoke, make it a long time in building, automobile, shipbuilding, the application is limited by the electrical industry, etc. In the 1970s, major plastic producers, such as the United States and west Germany, had strict regulations that required the use of plastic products on many occasions to be self-extinguishing, or they were banned.
To expand the application of plastic products, people use the additives (known as flame retardants) that can be used to stop the burning of plastic (called flame retardants) to be added to the plastic. In the United States, the production of flame retardants is the second most productive agent, second only to plasticizers. Polyethylene oxygen index is low (17.4), and high heat of combustion, if not flame retardant, will not be able to use a lot of situations, such as wire, cable, coal transportation, etc., so the polyethylene flame retardants is of great significance.
The mechanism of polyethylene flame retardant is complicated. According to the general view, the action of polyethylene flame retardant is divided into four categories:
(1) combine with the decomposition product of the plastic to produce a gas that can suffocate the flame. For example, antimony oxide (Sb2O3) reacts with the HCl in PVC, which is the result of the separation of oxygen from oxygen and the effect of quenching. This mechanism is called halogenous antimony.
(2) to slow the combustion rate by absorbing the heat generated by the burning of plastic. If the polyethylene flame retardants containing Al (OH) 3 (hydrated alumina) are decomposed, the heat of 150.48 kJ should be absorbed to reduce the burning speed to achieve the flame retardant.
(3) provide a coating that is insulated from oxygen. As phosphate ester, the phosphoric acid is formed when burning, and polymerized into polymorphic layer, isolating oxygen and achieving flame retardant effect.
Tris (2-Chloroethyl) Phosphate
There Are Three Industrial Methods: Phosphorus Oxychloride And Chloroethanol Reaction; Phosphorus Trichloride And Chloroethanol Reaction Reoxidation; Phosphorus Oxychloride And Ethylene Oxide Reaction (Industrial Commonly Used Method).
1, Phosphorus Oxychloride And Ethylene Oxide To Sodium Metavanadate As A Catalyst, At 50 ° C Reaction, The Reaction By Neutralization, Washing, Vacuum Dehydration Off The Low Boiling, That Is, The Finished Product. Chlorohydrin Can Also Be Used As Raw Materials, And Phosphorus Oxychloride Or Phosphorus Trichloride Reaction To Produce Tris (2-Chloro Ethyl) Phosphate.
2, 326 Kg Of Phosphorus Oxychloride And 1.0 Kg Of Sodium Metavanadate Into The Reactor. The Nitrogen In The Autoclave Was Driven By Nitrogen, And 650 Kg Of Ethylene Oxide Was Introduced Under Vacuum And Stirred At 45 To 50 ° C For 2 To 3 Hours. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated. Finished Product.
3. Put Phosphorus Oxychloride And Sodium Metaphosphate Into The Reactor. Nitrogen To Drive The Air, In The Vacuum Under The Access To Ethylene Oxide, At 45 ~ 50 ℃ Stirring 2 ~ 3h. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated Finished.
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%.
(4) can produce free radicals that prevent combustion reactions, and the product of poor combustion performance of plastics. When the plastic burns, the resulting free radical HO# reacts with the hydrocarbon chain, generating the new hydroxyl radical hos circulating and continuing to burn. If the HCl is released at the time of combustion, it can neutralize the hydroxyl free radical hos and terminate the combustion. Halogen organic compound flame retardant is the mechanism.
In order to achieve the flame retardant effect, the condition that the polyethylene flame retardant with industrial practical value must be possessed is: (1) not to reduce the use performance of the polymer, such as strength, heat resistance and so on. Good compatibility with resin and easy to disperse; (2) the decomposition temperature should not be too high, and it will not decompose at the processing temperature; (3) good durability, long term and unbroken; (4) the source is extensive and the price is low.
Polyethylene because of the low oxygen index, inflammable, high heat of combustion, when applied in areas such as wire, cable, coal mine, the limited use of the flame retardant performance requirements more and more high, therefore, such as halogen free, low smoke, low toxicity, etc.
The flame retardants are usually divided into inorganic flame retardants and organic flame retardants. In the past, halogen organic flame retardants have been used, and the amount of smoke emitted during combustion can be very difficult. If you switch to inorganic flame retardant aluminum hydroxide, although it is not toxic and low-smoke, the amount of added amount should reach more than 60%, and the processing and mechanical properties of polyethylene are worse. Therefore, the current research direction is the inorganic flame retardant system with low filling quantity, good flame retardant effect and no halogen, low smoke and low toxicity.
The single use of antimony oxide has almost no flame retardant effect, and the single-use halide is very large, so it is often used in combination to form a specially effective flame retardant system. The optimum ratio of this system is 1 mole of antimony plus 3 moles of halide. The most used halides are organic compounds containing bromine and chlorine, which are better in bromide, but they are cheaper and have stable performance. Therefore, they are more widely used.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Polyethylene (PE) is one of the largest thermoplastic wide usage, dosage, its products have a wide range of USES, can produce all kinds of articles for daily use not only, still can make a cold storage parts, electric parts, tube, film and other industrial products. In 1992-1998, China's PE developed rapidly, with annual output growth rate of 11.55%. By 2001, the global plan will add more than 10Mt of PE capacity, and China's PE production capacity will also increase substantially, and the PE production will be around 3Mt by 2000.
Most polymers such as polyethylene are easy burning, burning flares up not only, but also sends out a toxic gas and smoke, make it a long time in building, automobile, shipbuilding, the application is limited by the electrical industry, etc. In the 1970s, major plastic producers, such as the United States and west Germany, had strict regulations that required the use of plastic products on many occasions to be self-extinguishing, or they were banned.
To expand the application of plastic products, people use the additives (known as flame retardants) that can be used to stop the burning of plastic (called flame retardants) to be added to the plastic. In the United States, the production of flame retardants is the second most productive agent, second only to plasticizers. Polyethylene oxygen index is low (17.4), and high heat of combustion, if not flame retardant, will not be able to use a lot of situations, such as wire, cable, coal transportation, etc., so the polyethylene flame retardants is of great significance.
The mechanism of polyethylene flame retardant is complicated. According to the general view, the action of polyethylene flame retardant is divided into four categories:
(1) combine with the decomposition product of the plastic to produce a gas that can suffocate the flame. For example, antimony oxide (Sb2O3) reacts with the HCl in PVC, which is the result of the separation of oxygen from oxygen and the effect of quenching. This mechanism is called halogenous antimony.
(2) to slow the combustion rate by absorbing the heat generated by the burning of plastic. If the polyethylene flame retardants containing Al (OH) 3 (hydrated alumina) are decomposed, the heat of 150.48 kJ should be absorbed to reduce the burning speed to achieve the flame retardant.
(3) provide a coating that is insulated from oxygen. As phosphate ester, the phosphoric acid is formed when burning, and polymerized into polymorphic layer, isolating oxygen and achieving flame retardant effect.
Tris (2-Chloroethyl) Phosphate
There Are Three Industrial Methods: Phosphorus Oxychloride And Chloroethanol Reaction; Phosphorus Trichloride And Chloroethanol Reaction Reoxidation; Phosphorus Oxychloride And Ethylene Oxide Reaction (Industrial Commonly Used Method).
1, Phosphorus Oxychloride And Ethylene Oxide To Sodium Metavanadate As A Catalyst, At 50 ° C Reaction, The Reaction By Neutralization, Washing, Vacuum Dehydration Off The Low Boiling, That Is, The Finished Product. Chlorohydrin Can Also Be Used As Raw Materials, And Phosphorus Oxychloride Or Phosphorus Trichloride Reaction To Produce Tris (2-Chloro Ethyl) Phosphate.
2, 326 Kg Of Phosphorus Oxychloride And 1.0 Kg Of Sodium Metavanadate Into The Reactor. The Nitrogen In The Autoclave Was Driven By Nitrogen, And 650 Kg Of Ethylene Oxide Was Introduced Under Vacuum And Stirred At 45 To 50 ° C For 2 To 3 Hours. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated. Finished Product.
3. Put Phosphorus Oxychloride And Sodium Metaphosphate Into The Reactor. Nitrogen To Drive The Air, In The Vacuum Under The Access To Ethylene Oxide, At 45 ~ 50 ℃ Stirring 2 ~ 3h. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated Finished.
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%.
(4) can produce free radicals that prevent combustion reactions, and the product of poor combustion performance of plastics. When the plastic burns, the resulting free radical HO# reacts with the hydrocarbon chain, generating the new hydroxyl radical hos circulating and continuing to burn. If the HCl is released at the time of combustion, it can neutralize the hydroxyl free radical hos and terminate the combustion. Halogen organic compound flame retardant is the mechanism.
In order to achieve the flame retardant effect, the condition that the polyethylene flame retardant with industrial practical value must be possessed is: (1) not to reduce the use performance of the polymer, such as strength, heat resistance and so on. Good compatibility with resin and easy to disperse; (2) the decomposition temperature should not be too high, and it will not decompose at the processing temperature; (3) good durability, long term and unbroken; (4) the source is extensive and the price is low.
Polyethylene because of the low oxygen index, inflammable, high heat of combustion, when applied in areas such as wire, cable, coal mine, the limited use of the flame retardant performance requirements more and more high, therefore, such as halogen free, low smoke, low toxicity, etc.
The flame retardants are usually divided into inorganic flame retardants and organic flame retardants. In the past, halogen organic flame retardants have been used, and the amount of smoke emitted during combustion can be very difficult. If you switch to inorganic flame retardant aluminum hydroxide, although it is not toxic and low-smoke, the amount of added amount should reach more than 60%, and the processing and mechanical properties of polyethylene are worse. Therefore, the current research direction is the inorganic flame retardant system with low filling quantity, good flame retardant effect and no halogen, low smoke and low toxicity.
The single use of antimony oxide has almost no flame retardant effect, and the single-use halide is very large, so it is often used in combination to form a specially effective flame retardant system. The optimum ratio of this system is 1 mole of antimony plus 3 moles of halide. The most used halides are organic compounds containing bromine and chlorine, which are better in bromide, but they are cheaper and have stable performance. Therefore, they are more widely used.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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