News Details
Polycarbonate halogen-free high efficiency flame retardants
2017-12-3 15:48:28
Polycarbonate halogen-free high efficiency flame retardants
Polycarbonate (PC) is a kind of excellent comprehensive properties of thermoplastic engineering plastics, has outstanding high impact strength, transparency, dimensional stability, heat distortion temperature, has a wide range of temperature (-60 DEG ~120 DEG), good aging resistance, excellent electrical insulation properties, it is widely used in electronics, electrical appliances, construction, medical, computer, optical instruments, aerospace and other fields, to no halogen efficient flame retardant polycarbonate demand more and more.
With the increasing development of automotive, electronic and electrical, communications equipment and other industries, the plastic parts of the flame retardant products increasingly high performance requirements, although the PC itself has a certain flame retardant, can reach UL-94 V2 level, better than ordinary thermoplastic polymer, but still can not meet the requirements of PC flame retardant properties of certain areas, and hot melt PC burning drip is easy to cause the materials near the fire, so PC had to be flame retardant.
The traditional flame retardant polycarbonate (PC) materials are commonly used brominated flame retardant, flame retardant properties generally add volume is not large can make a good PC to UL-94 V0, and the properties of flame retardant PC is better, but the brominated flame retardants because of its pollution to the environment and gradually limited use, and corrosive gases produce halogenated flame retardants during pyrolysis process can lead to the key components of electrical and electronic equipment failure, to the life safety of the great hidden dangers, so the people, with the people of high flame retardant polymeric materials and the requirements of environmental protection, low halogen or halogen free, low toxicity and smoke suppression, high efficiency, multi function has become a hotspot of halogen-free flame retardant polycarbonate, development and application research.
At present, halogen free flame retardants have been widely used in flame retardant PC. Commonly used polycarbonate halogen free high efficiency flame retardants are mainly phosphorus, boron, silicon and sulfonate systems. Compared with brominated flame retardants, polycarbonate halogen free and efficient flame retardants are beneficial to protect the ecological environment and human health.
Flame retardant addition, most of the decomposition temperature is relatively low, relatively large impact on the mechanical properties of the material, and easy corrosion of mold, reduce the processing properties of polymer, and some toxic substances exuded from plastic, and cause two pollution; boron based flame retardant efficiency is not high, usually only by compounding can to achieve good effect; the silicone compound is considered a kind of high efficiency, low toxicity, environmental friendly flame retardant, but the high cost limits its use, often with other flame retardant composite; sulfonate series flame retardant high efficiency, little amount of PC can be reached UL-94 V0 (3.2mm), but to meet the flame retardant properties of higher needs to use with other flame retardants.
Flame retardant mechanism of flame retardant in general can be divided into the following categories: (1), gas phase flame retardant, which plays a role in inhibiting the chain growth of free radicals in the combustion reaction; (2) the condensed phase flame retardant, decomposition and prevent the release of flammable gas polymer terminated polymers in the solid phase heat; (3) interrupt heat exchange soon, the heat generated by the polymer and not take feedback to the polymer, the polymer is no longer continuous decomposition.
Triphenyl Phosphate (TPP)
The product output : 100 tons / month
Shipping Port: China Shanghai
Price offer is valid : 15 days
Export rights: the right to import and export company .
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.
The flame retardant mechanism of PC sulfonate is different from the above, according to the relevant literature, most believed that isomerization under high temperature sulfonate can promote the PC and release of CO2 and H2O noncombustibility, isomerization can improve and accelerate the charring rate of PC crosslinking, formation of carbon layer on the surface of PC, no burning gas can dilute combustible flame retardant, which will help PC. In addition, the formation of the droplets can be effectively suppressed by the crosslinking effect.
Raw and auxiliary materials: sulfonate flame retardant A:AFR-01, halogen free phosphorus free flame retardant, sulfonate flame retardant B:AFR-02, halogen free phosphorus free flame retardant, silicon flame retardant C, polytetrafluoroethylene (PTFE) D.
Equipment and instrument: twin screw extruder: TSE-40 /75 type; injection molding machine: S900; universal tensile testing machine: CMT6104; pendulum impact tester: ZBC1400-2; horizontal vertical combustion tester: ZF-3 type.
The raw materials and other additives are mixed in certain proportion, through a double screw extruder to melt extrusion granulation, pellets after drying, using injection molding machine made of standard sample and standard sample after molding in temperature (23 + 2) temperature, humidity (50 + 5) placed 24H% of the environment and then according to the test standard the corresponding test.
Tensile strength test: according to GB/T 1040-2006 test; bending strength test: press GB/T 9341-2008 test; impact strength test: press GB/T 1043-2008 test; combustion performance test: according to UL-94 standard test, the test sample thickness is 3.2mm, 1.6mm.
The effects of different sulfonate flame retardants (A, B) on the flame retardant PC can be seen as follows:
(1) the extremely low addition of flame retardant A (0.15) and B (0.2) can make the thicker sample (3.2mm) reach the flame retardant level of UL-94 V0, and the flame retardant efficiency is very high, but the effect is not good for thin-walled parts.
(2) with the increase of the amount of flame retardants, the effect of flame retardancy is not better, but the effect of flame retardant is worse. The general dosage is controlled in A:0.1-0.2%, B:0.1-0.3%.
(3) because the addition of the flame retardant is very low, it is very good to maintain the performance of PC, basically not much change.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polycarbonate (PC) is a kind of excellent comprehensive properties of thermoplastic engineering plastics, has outstanding high impact strength, transparency, dimensional stability, heat distortion temperature, has a wide range of temperature (-60 DEG ~120 DEG), good aging resistance, excellent electrical insulation properties, it is widely used in electronics, electrical appliances, construction, medical, computer, optical instruments, aerospace and other fields, to no halogen efficient flame retardant polycarbonate demand more and more.
With the increasing development of automotive, electronic and electrical, communications equipment and other industries, the plastic parts of the flame retardant products increasingly high performance requirements, although the PC itself has a certain flame retardant, can reach UL-94 V2 level, better than ordinary thermoplastic polymer, but still can not meet the requirements of PC flame retardant properties of certain areas, and hot melt PC burning drip is easy to cause the materials near the fire, so PC had to be flame retardant.
The traditional flame retardant polycarbonate (PC) materials are commonly used brominated flame retardant, flame retardant properties generally add volume is not large can make a good PC to UL-94 V0, and the properties of flame retardant PC is better, but the brominated flame retardants because of its pollution to the environment and gradually limited use, and corrosive gases produce halogenated flame retardants during pyrolysis process can lead to the key components of electrical and electronic equipment failure, to the life safety of the great hidden dangers, so the people, with the people of high flame retardant polymeric materials and the requirements of environmental protection, low halogen or halogen free, low toxicity and smoke suppression, high efficiency, multi function has become a hotspot of halogen-free flame retardant polycarbonate, development and application research.
At present, halogen free flame retardants have been widely used in flame retardant PC. Commonly used polycarbonate halogen free high efficiency flame retardants are mainly phosphorus, boron, silicon and sulfonate systems. Compared with brominated flame retardants, polycarbonate halogen free and efficient flame retardants are beneficial to protect the ecological environment and human health.
Flame retardant addition, most of the decomposition temperature is relatively low, relatively large impact on the mechanical properties of the material, and easy corrosion of mold, reduce the processing properties of polymer, and some toxic substances exuded from plastic, and cause two pollution; boron based flame retardant efficiency is not high, usually only by compounding can to achieve good effect; the silicone compound is considered a kind of high efficiency, low toxicity, environmental friendly flame retardant, but the high cost limits its use, often with other flame retardant composite; sulfonate series flame retardant high efficiency, little amount of PC can be reached UL-94 V0 (3.2mm), but to meet the flame retardant properties of higher needs to use with other flame retardants.
Flame retardant mechanism of flame retardant in general can be divided into the following categories: (1), gas phase flame retardant, which plays a role in inhibiting the chain growth of free radicals in the combustion reaction; (2) the condensed phase flame retardant, decomposition and prevent the release of flammable gas polymer terminated polymers in the solid phase heat; (3) interrupt heat exchange soon, the heat generated by the polymer and not take feedback to the polymer, the polymer is no longer continuous decomposition.
Triphenyl Phosphate (TPP)
The product output : 100 tons / month
Shipping Port: China Shanghai
Price offer is valid : 15 days
Export rights: the right to import and export company .
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.
The flame retardant mechanism of PC sulfonate is different from the above, according to the relevant literature, most believed that isomerization under high temperature sulfonate can promote the PC and release of CO2 and H2O noncombustibility, isomerization can improve and accelerate the charring rate of PC crosslinking, formation of carbon layer on the surface of PC, no burning gas can dilute combustible flame retardant, which will help PC. In addition, the formation of the droplets can be effectively suppressed by the crosslinking effect.
Raw and auxiliary materials: sulfonate flame retardant A:AFR-01, halogen free phosphorus free flame retardant, sulfonate flame retardant B:AFR-02, halogen free phosphorus free flame retardant, silicon flame retardant C, polytetrafluoroethylene (PTFE) D.
Equipment and instrument: twin screw extruder: TSE-40 /75 type; injection molding machine: S900; universal tensile testing machine: CMT6104; pendulum impact tester: ZBC1400-2; horizontal vertical combustion tester: ZF-3 type.
The raw materials and other additives are mixed in certain proportion, through a double screw extruder to melt extrusion granulation, pellets after drying, using injection molding machine made of standard sample and standard sample after molding in temperature (23 + 2) temperature, humidity (50 + 5) placed 24H% of the environment and then according to the test standard the corresponding test.
Tensile strength test: according to GB/T 1040-2006 test; bending strength test: press GB/T 9341-2008 test; impact strength test: press GB/T 1043-2008 test; combustion performance test: according to UL-94 standard test, the test sample thickness is 3.2mm, 1.6mm.
The effects of different sulfonate flame retardants (A, B) on the flame retardant PC can be seen as follows:
(1) the extremely low addition of flame retardant A (0.15) and B (0.2) can make the thicker sample (3.2mm) reach the flame retardant level of UL-94 V0, and the flame retardant efficiency is very high, but the effect is not good for thin-walled parts.
(2) with the increase of the amount of flame retardants, the effect of flame retardancy is not better, but the effect of flame retardant is worse. The general dosage is controlled in A:0.1-0.2%, B:0.1-0.3%.
(3) because the addition of the flame retardant is very low, it is very good to maintain the performance of PC, basically not much change.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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