News Details
ABS plastic flame retardant and smoke suppressant
2017-11-18 11:26:48
ABS plastic flame retardant and smoke suppressant
The principle of smoke generation of plastics is that a large amount of smoke is produced by the combustion of polymers, and the smoke produced by some polymers is toxic. When adding flame retardants in polymers, especially halogen and antimony containing flame retardants, more smoke and toxic gases will be produced during combustion.
Smoke is a combined reaction of black smoke and white smoke in the process of combustion of materials.
In the modern flame retardant technology, "flame retardant" and "smoke suppression" in the same breath, for some polymers, "smoke suppression" is more important than "flame retardant", therefore, the development of ABS plastic flame retardant smoke suppressant is very important.
What kind of material has the condition of ABS plastic flame retardant and smoke suppressant? When the material burns, the flame is diffused, and the convection of the air brings the carbonized matter into the air, which is the fundamental cause of the increase of the smoke amount.
If the carbonized material has been fixed on the surface of the combustion material instead of floating in the air, the smoke density of the material will be greatly reduced. The key to this idea is to synthesize or look for a compound that can fuse between 700~1000 degrees centigrade and has the properties similar to an adhesive, which produces the particles carbonized onto the surface of the combustion.
Smoke suppressant formula in the design of ABS flame retardant plastics, we should select flame retardant low smoke halogen / antimony flame retardant system, diffusion and increase of encapsulated red phosphorus amount of smoke and toxic gases. Therefore, it is best to add smoke suppressant at the same time when using brominated flame retardant system.
There are many materials that can be used for smoke suppression. In summary, smoke suppressant can be divided into two categories, inorganic and organic, and inorganic smoke suppressant is the most commonly used. The commercial smoke suppressant varieties are introduced below.
Inorganic smoke suppressant (1) molybdenum compound
This is the commonly used smoke suppressant, and the specific varieties are three oxidation two molybdenum, eight ammonium molybdate, calcium molybdate, etc. the principle of smoke suppression is to form carbon residue in the combustion process with PVC and other resins, covering the polymer surface, so as to achieve the effect of flame retardant and smoke suppression. The average amount of smoke inhibitor added with molybdenum series is between 2%~3%, which can reduce the smoke yield of 30%~80%. For example, by molybdenum trioxide, phosphoric acid and calcium hydroxide synthesized calcium phosphomolybdate, adding PVC in the combustion maximum smoke density is reduced to 297, no combustion maximum smoke density is reduced to 351.
So far, it has been found that the best smoke inhibitor is molybdenum compounds, so the development and application of molybdenum compounds become a hot research field in the field of flame retardants. The United States has developed a series of ammonium free molybdate smoke suppressants, which can be used to process temperatures above 200 degrees celsius. At present, molybdenum compounds as flame retardants are still in their infancy in china.
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.
(2) metal hydroxides
The main varieties are aluminum hydroxide and magnesium hydroxide, and the principle of smoke suppression is:
(1) the alumina and Magnesium Oxide formed in the heating process have a large surface area and can adsorb soot;
The formation of carbon was promoted in solid phase:
A large amount of heat absorption will greatly reduce the temperature of polymer and slow down its thermal decomposition rate;
(4) the exothermic water becomes water vapor, which can dilute the combustible gas, dilute the smoke, and play a dual role of flame retardant and smoke elimination.
It can react with halogenated hydrogen which is heated by decomposition of halogen compounds (capturing hydrogen halides), thus reducing the amount of hydrogen halide in the smoke.
Black smoke refers to suspended solid particles and agglomerates in combustion gas products. Usually think of ways to reduce the concentration of black smoke has three: one is the reference covering effect, transfer effect, inhibition of free radicals, accelerate carbon flame retardant principle change the combustion mode; two is a lot of filling inorganic materials, to reduce the amount of smoke by reducing the content of combustible materials, but excessive use will cause serious damage to the products performance; three is the use of synergistic effect of composite.
White smoke is mainly due to the combustion of water vapor condensate generated in the combustion of small particles in the air. Although water vapor is harmless to human body, the light transmittance decreases and the smoke density increases. Aluminum hydroxide and magnesium hydroxide play the role of flame retardant due to the absorption of combustion heat, but the generated water vapor is the main cause of white smoke. Therefore, it is very important to achieve a balance between flame retardant and smoke suppression.
Maximum specific optical density (Dm) is a measure of the amount of plastic smoke, also known as the maximum smoke density. The greater the maximum specific optical density is, the greater the smoke is, the more dense the black smoke is, the greater the environmental pollution is.
Cigarette smoke containing double bonds, benzene rings and chlorine containing plastics is relatively large. Traditionally, the resin with maximum specific optical density less than 300 is called smokeless plastic when burning, such as POM, PA6, PA66, PMMA, LDPE, HDPE, PP, PTFE, PVDC, Dm, etc.. Conversely, when the maximum specific optical density (Dm) is greater than 300, the resin is called smoke plastic, such as PET, PC, PS, PPO, ABS and PVC. In fact, the smoke abatement is only aimed at the smoke plastic, especially the PVC resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The principle of smoke generation of plastics is that a large amount of smoke is produced by the combustion of polymers, and the smoke produced by some polymers is toxic. When adding flame retardants in polymers, especially halogen and antimony containing flame retardants, more smoke and toxic gases will be produced during combustion.
Smoke is a combined reaction of black smoke and white smoke in the process of combustion of materials.
In the modern flame retardant technology, "flame retardant" and "smoke suppression" in the same breath, for some polymers, "smoke suppression" is more important than "flame retardant", therefore, the development of ABS plastic flame retardant smoke suppressant is very important.
What kind of material has the condition of ABS plastic flame retardant and smoke suppressant? When the material burns, the flame is diffused, and the convection of the air brings the carbonized matter into the air, which is the fundamental cause of the increase of the smoke amount.
If the carbonized material has been fixed on the surface of the combustion material instead of floating in the air, the smoke density of the material will be greatly reduced. The key to this idea is to synthesize or look for a compound that can fuse between 700~1000 degrees centigrade and has the properties similar to an adhesive, which produces the particles carbonized onto the surface of the combustion.
Smoke suppressant formula in the design of ABS flame retardant plastics, we should select flame retardant low smoke halogen / antimony flame retardant system, diffusion and increase of encapsulated red phosphorus amount of smoke and toxic gases. Therefore, it is best to add smoke suppressant at the same time when using brominated flame retardant system.
There are many materials that can be used for smoke suppression. In summary, smoke suppressant can be divided into two categories, inorganic and organic, and inorganic smoke suppressant is the most commonly used. The commercial smoke suppressant varieties are introduced below.
Inorganic smoke suppressant (1) molybdenum compound
This is the commonly used smoke suppressant, and the specific varieties are three oxidation two molybdenum, eight ammonium molybdate, calcium molybdate, etc. the principle of smoke suppression is to form carbon residue in the combustion process with PVC and other resins, covering the polymer surface, so as to achieve the effect of flame retardant and smoke suppression. The average amount of smoke inhibitor added with molybdenum series is between 2%~3%, which can reduce the smoke yield of 30%~80%. For example, by molybdenum trioxide, phosphoric acid and calcium hydroxide synthesized calcium phosphomolybdate, adding PVC in the combustion maximum smoke density is reduced to 297, no combustion maximum smoke density is reduced to 351.
So far, it has been found that the best smoke inhibitor is molybdenum compounds, so the development and application of molybdenum compounds become a hot research field in the field of flame retardants. The United States has developed a series of ammonium free molybdate smoke suppressants, which can be used to process temperatures above 200 degrees celsius. At present, molybdenum compounds as flame retardants are still in their infancy in china.
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.
(2) metal hydroxides
The main varieties are aluminum hydroxide and magnesium hydroxide, and the principle of smoke suppression is:
(1) the alumina and Magnesium Oxide formed in the heating process have a large surface area and can adsorb soot;
The formation of carbon was promoted in solid phase:
A large amount of heat absorption will greatly reduce the temperature of polymer and slow down its thermal decomposition rate;
(4) the exothermic water becomes water vapor, which can dilute the combustible gas, dilute the smoke, and play a dual role of flame retardant and smoke elimination.
It can react with halogenated hydrogen which is heated by decomposition of halogen compounds (capturing hydrogen halides), thus reducing the amount of hydrogen halide in the smoke.
Black smoke refers to suspended solid particles and agglomerates in combustion gas products. Usually think of ways to reduce the concentration of black smoke has three: one is the reference covering effect, transfer effect, inhibition of free radicals, accelerate carbon flame retardant principle change the combustion mode; two is a lot of filling inorganic materials, to reduce the amount of smoke by reducing the content of combustible materials, but excessive use will cause serious damage to the products performance; three is the use of synergistic effect of composite.
White smoke is mainly due to the combustion of water vapor condensate generated in the combustion of small particles in the air. Although water vapor is harmless to human body, the light transmittance decreases and the smoke density increases. Aluminum hydroxide and magnesium hydroxide play the role of flame retardant due to the absorption of combustion heat, but the generated water vapor is the main cause of white smoke. Therefore, it is very important to achieve a balance between flame retardant and smoke suppression.
Maximum specific optical density (Dm) is a measure of the amount of plastic smoke, also known as the maximum smoke density. The greater the maximum specific optical density is, the greater the smoke is, the more dense the black smoke is, the greater the environmental pollution is.
Cigarette smoke containing double bonds, benzene rings and chlorine containing plastics is relatively large. Traditionally, the resin with maximum specific optical density less than 300 is called smokeless plastic when burning, such as POM, PA6, PA66, PMMA, LDPE, HDPE, PP, PTFE, PVDC, Dm, etc.. Conversely, when the maximum specific optical density (Dm) is greater than 300, the resin is called smoke plastic, such as PET, PC, PS, PPO, ABS and PVC. In fact, the smoke abatement is only aimed at the smoke plastic, especially the PVC resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian