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Halogen flame retardants for polyolefins
2017-11-15 15:44:26
Halogen flame retardants for polyolefins
Halogen flame retardants for polyolefins include brominated and chlorine based flame retardants. Halogen flame retardants for polyolefins are one of the largest organic flame retardants in the world.
Most of halogenated flame retardants used in polyolefins are brominated flame retardants. Brominated flame retardants in industrial production can be classified into three categories: addition type, reactive type and high polymer type, and there are many varieties.
The existing more than 20 kinds of additive brominated flame retardants on the domestic and foreign markets, brominated polymeric flame retardant more than 10 kinds of reaction type, brominated flame retardant of more than 20. Flame retardants are the main type of decabromodiphenyl oxide (DBDPO). Four tetrabromobisphenol A bis (2, 3 and one or two alkyl propyl ether) (TBAB), eight bromo two phenyl ether (OBDPO); there are four main reactive flame retardant tetrabromobisphenol A (TBBPA), 2, 4, 6- and other polymer tribromophenol; flame retardant to brominated polystyrene, brominated epoxy, four bromo bisphenol A carbonate oligomers.
The main reason for brominated flame retardants is its high flame retardant efficiency and moderate price. Because the C-Br bond can lower the decomposition temperature of most brominated flame retardants at 200 DEG -300 DEG, decomposition temperature range the temperature range was also commonly used polymer.
So in polymer decomposition, brominated flame retardants also began to decompose, and decomposition of polymer materials when capturing free radicals, thereby delaying or inhibiting the firing chain reaction, while the release of the HBr itself is a kind of difficult burning gas, can cover the surface of the material, to isolate the oxygen concentration and dilution effect. This kind of flame retardant is no exception with antimony (three oxidation two antimony or five oxidation two antimony) mixed use, through the synergistic effect of flame retardant effect has been significantly improved.
Halogen flame retardants for polyolefins mainly play a role of flame retardant in the gas phase. Because the hydrogen halide gas produced by the decomposition of halides is nonflammable gas with dilution effect. It has a large proportion, forming a layer of gas film, covering the solid surface of polymer material, isolating air and heat, and covering effect. More importantly, halogenated hydrogen energy inhibits the chain reaction of the combustion of polymer materials, and plays a role in scavenging free radicals.
Bromine containing flame retardant added polymer materials, fire heat decomposition reaction, generating free radical Br, and polymer and reaction of hydrogen bromide and hydrogen bromide, the activity of strong OH? Free radical reaction, on the one hand makes the Br regeneration, OH free radical concentration decreased? The combustion of chain reaction is inhibited, the combustion speed slows down, until extinguished.
Triphenyl Phosphate (TPP)
Triphenyl Phosphatetpp-cas: 15-86-6
EINECS number: 204-112-2
Chinese Name: Triphenyl Phosphate
Chinese alias: phosphoric acid three phenyl ester; flame retardant TPP; TPP
English Name: Triphenyl Phosphate
English alias: Triphenyl Phosphate free of phenol; Triphenyl Phosphate (TPPa); Triphenyl Phosphate white XTL Phosphoric acid triphenyl ester; TPP
Molecular formula: C18H15O4P; OP (OC6H5) 3
Appearance and properties: white crystalline powder, odorless, slightly deliquescence
Molecular weight: 326.29
Steam pressure: 0.01kPa/20 ℃
The above is the product of the CAS, such as Triphenyl Phosphate tpp-cas: 15-86-6 other information please contact us!
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.
But when a fire occurs, due to the decomposition and combustion produces a large amount of smoke and toxic corrosive gases caused by "two disaster" of these materials, and the combustion products (halide) have very long atmospheric lifetimes, once into the atmosphere is very difficult to remove, seriously pollutes the atmospheric environment, the destruction of the ozone layer. In addition, the combustion and pyrolysis of polymer materials of polybrominated diphenyl ether two flame retardant containing toxic polybrominated benzene two and two dioxane (PBDD) and polybrominated dibenzofuran (PBDF) two. In September 1994, the environmental protection agency of the United States demonstrated that these substances were toxic to humans and animals.
Since the beginning of 1950s since more than 60 years, especially since the beginning of the 1980s has been about 30 years, flame retardant (FR) and flame retardant polymer materials play an important role in reducing the fire caused loss of life and property. At present, the total amount of FR in the world is second only to plasticizers in all kinds of plastic additives, ranking the second place.
With the strengthening of the national requirements for flame retardant technology, the development and development of flame retardants in China will have a broader prospect. Chinese flame retardant both in variety or in quantity with the developed countries there is a gap, and broad prospects for development, should improve the ability of innovation and development, push towards environmental protection, low toxicity, high efficiency and multifunction in the direction of the development of flame retardant industry.
The environmental problem is the focus of development and application of additives are concerned, so at home and abroad has been in the adjustment of product structure of flame retardant, increasing the development of efficient and environmentally friendly flame retardant. No halogen, low smoke and low toxic flame retardant has always been the pursuit of the goal, so the people of non halogen flame retardant development showed a high enthusiasm, put a lot of power, and has achieved impressive results.
Flame retardants are mainly used in transportation, electrical and electronic equipment, furniture and building materials. Flame retardant material does not allow the ability to obtain complete resistance to fire, but it still can reduce the fire, and win precious time for people in the fire escape. A fire in the space, the flammable gas and heat accumulation may occur "flash" phenomenon -- all flammable substances are fire in 1~2 seconds at the same time. And the emergence of flame retardants, can effectively avoid this situation. In cathode ray tube television plastic shell as an example, if it has not been left to the people in the fire retardant treatment, the escape time is less than 2 minutes, and the flame retardant under the help of the escape time can be increased to more than 30 minutes.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Halogen flame retardants for polyolefins include brominated and chlorine based flame retardants. Halogen flame retardants for polyolefins are one of the largest organic flame retardants in the world.
Most of halogenated flame retardants used in polyolefins are brominated flame retardants. Brominated flame retardants in industrial production can be classified into three categories: addition type, reactive type and high polymer type, and there are many varieties.
The existing more than 20 kinds of additive brominated flame retardants on the domestic and foreign markets, brominated polymeric flame retardant more than 10 kinds of reaction type, brominated flame retardant of more than 20. Flame retardants are the main type of decabromodiphenyl oxide (DBDPO). Four tetrabromobisphenol A bis (2, 3 and one or two alkyl propyl ether) (TBAB), eight bromo two phenyl ether (OBDPO); there are four main reactive flame retardant tetrabromobisphenol A (TBBPA), 2, 4, 6- and other polymer tribromophenol; flame retardant to brominated polystyrene, brominated epoxy, four bromo bisphenol A carbonate oligomers.
The main reason for brominated flame retardants is its high flame retardant efficiency and moderate price. Because the C-Br bond can lower the decomposition temperature of most brominated flame retardants at 200 DEG -300 DEG, decomposition temperature range the temperature range was also commonly used polymer.
So in polymer decomposition, brominated flame retardants also began to decompose, and decomposition of polymer materials when capturing free radicals, thereby delaying or inhibiting the firing chain reaction, while the release of the HBr itself is a kind of difficult burning gas, can cover the surface of the material, to isolate the oxygen concentration and dilution effect. This kind of flame retardant is no exception with antimony (three oxidation two antimony or five oxidation two antimony) mixed use, through the synergistic effect of flame retardant effect has been significantly improved.
Halogen flame retardants for polyolefins mainly play a role of flame retardant in the gas phase. Because the hydrogen halide gas produced by the decomposition of halides is nonflammable gas with dilution effect. It has a large proportion, forming a layer of gas film, covering the solid surface of polymer material, isolating air and heat, and covering effect. More importantly, halogenated hydrogen energy inhibits the chain reaction of the combustion of polymer materials, and plays a role in scavenging free radicals.
Bromine containing flame retardant added polymer materials, fire heat decomposition reaction, generating free radical Br, and polymer and reaction of hydrogen bromide and hydrogen bromide, the activity of strong OH? Free radical reaction, on the one hand makes the Br regeneration, OH free radical concentration decreased? The combustion of chain reaction is inhibited, the combustion speed slows down, until extinguished.
Triphenyl Phosphate (TPP)
Triphenyl Phosphatetpp-cas: 15-86-6
EINECS number: 204-112-2
Chinese Name: Triphenyl Phosphate
Chinese alias: phosphoric acid three phenyl ester; flame retardant TPP; TPP
English Name: Triphenyl Phosphate
English alias: Triphenyl Phosphate free of phenol; Triphenyl Phosphate (TPPa); Triphenyl Phosphate white XTL Phosphoric acid triphenyl ester; TPP
Molecular formula: C18H15O4P; OP (OC6H5) 3
Appearance and properties: white crystalline powder, odorless, slightly deliquescence
Molecular weight: 326.29
Steam pressure: 0.01kPa/20 ℃
The above is the product of the CAS, such as Triphenyl Phosphate tpp-cas: 15-86-6 other information please contact us!
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.
But when a fire occurs, due to the decomposition and combustion produces a large amount of smoke and toxic corrosive gases caused by "two disaster" of these materials, and the combustion products (halide) have very long atmospheric lifetimes, once into the atmosphere is very difficult to remove, seriously pollutes the atmospheric environment, the destruction of the ozone layer. In addition, the combustion and pyrolysis of polymer materials of polybrominated diphenyl ether two flame retardant containing toxic polybrominated benzene two and two dioxane (PBDD) and polybrominated dibenzofuran (PBDF) two. In September 1994, the environmental protection agency of the United States demonstrated that these substances were toxic to humans and animals.
Since the beginning of 1950s since more than 60 years, especially since the beginning of the 1980s has been about 30 years, flame retardant (FR) and flame retardant polymer materials play an important role in reducing the fire caused loss of life and property. At present, the total amount of FR in the world is second only to plasticizers in all kinds of plastic additives, ranking the second place.
With the strengthening of the national requirements for flame retardant technology, the development and development of flame retardants in China will have a broader prospect. Chinese flame retardant both in variety or in quantity with the developed countries there is a gap, and broad prospects for development, should improve the ability of innovation and development, push towards environmental protection, low toxicity, high efficiency and multifunction in the direction of the development of flame retardant industry.
The environmental problem is the focus of development and application of additives are concerned, so at home and abroad has been in the adjustment of product structure of flame retardant, increasing the development of efficient and environmentally friendly flame retardant. No halogen, low smoke and low toxic flame retardant has always been the pursuit of the goal, so the people of non halogen flame retardant development showed a high enthusiasm, put a lot of power, and has achieved impressive results.
Flame retardants are mainly used in transportation, electrical and electronic equipment, furniture and building materials. Flame retardant material does not allow the ability to obtain complete resistance to fire, but it still can reduce the fire, and win precious time for people in the fire escape. A fire in the space, the flammable gas and heat accumulation may occur "flash" phenomenon -- all flammable substances are fire in 1~2 seconds at the same time. And the emergence of flame retardants, can effectively avoid this situation. In cathode ray tube television plastic shell as an example, if it has not been left to the people in the fire retardant treatment, the escape time is less than 2 minutes, and the flame retardant under the help of the escape time can be increased to more than 30 minutes.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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