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Halogen free flame retardants for polyolefins
2017-11-19 14:46:40
Halogen free flame retardants for polyolefins
Halogen-free flame retardant polyolefin and actively carry out, will be the twenty-first Century flame retardant is one of the most active research domain, especially in China's huge development potential and the space, in order to better meet the needs of flame retardant synthetic materials, improve the polyolefin halogen-free flame retardant effect and field, should focus on the following aspects in the future.
(1) the research and development of surface treatment technology of non halogen flame retardant polyolefin masterbatch, especially the preparation technology of Microencapsulated Red Phosphorus and antimony oxide.
(2) the composite flame retardant system has the characteristics of many kinds of flame retardants. The synergistic effect of different flame retardants opens up a broad prospect for the flame retardant of synthetic materials. Therefore, it is very important to accelerate the research of inorganic flame retardants and inorganic and organic flame retardants.
(3) develop new and efficient inorganic flame retardants, such as borate, molybdenum compounds, tin compounds and zirconium compounds, and strengthen the development of nano flame retardants.
Metal hydrate oxides can also adsorb soot particles and play a role in smoke suppression. Hydroxide flame retardant also has the advantages of anti dripping, carbonization, non volatilization, no exudation, and long-term retention in polymer medium efficacy. But with the amount of hydroxide flame retardant effect is closely related with the addition amount of flame retardant polymer increased and increased rapidly, the oxygen index of flame retardant materials is above 26, but high dosage will affect the processability and mechanical properties of the substrate, will greatly reduce the compatibility of materials.
Grain refinement, surface modification and synergistic composite technology are three main development directions. The Mg (OH) 2 surface modified with LDPE graft was used for flame retardancy of PA66, and it was compared with the traditional silane coupling agent KH550 modified Mg (OH) 2. It is found that the Mg (OH) 2 modified by LDPE graft copolymer has good dispersion and excellent flame retardance. The oxygen index of PA66 can reach 31 and the flame retardant grade is V-0 when the addition amount is 40%.
Because halogen flame retardants release a large amount of smoke and poisonous gas during combustion, the developed countries have made strict regulations on their use. With the improvement of living standards, people's demand for safety and environmental protection has also increased accordingly.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Appearance: Colorless Viscous Liquid
Melting Point: -64 ℃
Boiling Point: 315 ℃
Density: 1.512
Flash Point: 249 ℃
Refractive Index: N20 / D 1.503
Specific Gravity 1.490-1.510
Chlorine Content Of 49.5% ± 0.5
Color Value Max 100
Water Content 0.10% Max
Viscosity (25 ° C) 1500-1800 CPS
Acidity (Mg KOH / G 0.10 Max
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent
Smoke is the basic characteristic of polymer combustion. The smoke density not only reduces environmental visibility, but also brings inconvenience to disaster relief, and smoke is also the most lethal factor in fire. Data statistics show that 80% of the deaths in the fire are caused by smoke suffocation. Therefore, "flame retardant" and "smoke suppression" in flame retardant technology have been mentioned in the same breath. And for some types of plastic materials, such as PVC, smoke suppression is more important than flame retardant. It is an effective and economical way to solve the problem of smoke elimination by using common flame retardant and molybdenum compound.
Halogen free flame retardant of polyolefin has many advantages, such as low price, wide source, non-toxic, non corrosive, no two pollution during combustion. In order to reduce the harmful side effects of flame retardants, many countries are concentrating their efforts on the development of high-performance halogen-free flame retardants. Superfine, surface modified and microencapsulated halogen free flame retardants will become a new favorite in the plastics industry.
In short, the development trend of plastic flame retardants will be high efficiency, smoke suppression, non-toxic, cheap, and little impact on the use of plastic products. At present, special attention should be paid to various new inorganic flame retardants.
There are some flame retardants in the experiment were also studied, including: nylon matrix graft copolymer, nylon, nylon as flame retardant additives and high carbon additives, such as in nylon 6, 6 with high carbon additive PVA (polyvinyl alcohol), is conducive to high temperature dehydration and carbonization. However, the compatibility between PVA and nylon is poor, so PVA is oxidized by KMnO4 to form Mn chelate.
The nylon 6, 6 was added to the oxidized PVA by cone calorimeter. The peak rate of heat release was reduced from 1124kWm- 2 to 400 Wm- 2. Although nylon itself is flammable, in some cases, nylon and other polymers can improve the flame retardancy of the polymer. The synergistic effect of nylon 6 in the fiber is very important. As long as a few hundred ppm of phosphorus is added in the polyester, the flame retardant effect is obtained.
The use of flame retardants in plastics can enhance fire safety and reduce the risk of fire, which helps to solve the problems caused by combustion products. Compared with the blank experiment without flame retardant, the flame retardant provided a long time to escape from the fire, reduced the heat release and the production of toxic combustion products, while the material consumption was less, and there was no difference in the amount of raw smoke between the two. The research on the by-products of brominated flame retardants has not been done yet.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Halogen-free flame retardant polyolefin and actively carry out, will be the twenty-first Century flame retardant is one of the most active research domain, especially in China's huge development potential and the space, in order to better meet the needs of flame retardant synthetic materials, improve the polyolefin halogen-free flame retardant effect and field, should focus on the following aspects in the future.
(1) the research and development of surface treatment technology of non halogen flame retardant polyolefin masterbatch, especially the preparation technology of Microencapsulated Red Phosphorus and antimony oxide.
(2) the composite flame retardant system has the characteristics of many kinds of flame retardants. The synergistic effect of different flame retardants opens up a broad prospect for the flame retardant of synthetic materials. Therefore, it is very important to accelerate the research of inorganic flame retardants and inorganic and organic flame retardants.
(3) develop new and efficient inorganic flame retardants, such as borate, molybdenum compounds, tin compounds and zirconium compounds, and strengthen the development of nano flame retardants.
Metal hydrate oxides can also adsorb soot particles and play a role in smoke suppression. Hydroxide flame retardant also has the advantages of anti dripping, carbonization, non volatilization, no exudation, and long-term retention in polymer medium efficacy. But with the amount of hydroxide flame retardant effect is closely related with the addition amount of flame retardant polymer increased and increased rapidly, the oxygen index of flame retardant materials is above 26, but high dosage will affect the processability and mechanical properties of the substrate, will greatly reduce the compatibility of materials.
Grain refinement, surface modification and synergistic composite technology are three main development directions. The Mg (OH) 2 surface modified with LDPE graft was used for flame retardancy of PA66, and it was compared with the traditional silane coupling agent KH550 modified Mg (OH) 2. It is found that the Mg (OH) 2 modified by LDPE graft copolymer has good dispersion and excellent flame retardance. The oxygen index of PA66 can reach 31 and the flame retardant grade is V-0 when the addition amount is 40%.
Because halogen flame retardants release a large amount of smoke and poisonous gas during combustion, the developed countries have made strict regulations on their use. With the improvement of living standards, people's demand for safety and environmental protection has also increased accordingly.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Appearance: Colorless Viscous Liquid
Melting Point: -64 ℃
Boiling Point: 315 ℃
Density: 1.512
Flash Point: 249 ℃
Refractive Index: N20 / D 1.503
Specific Gravity 1.490-1.510
Chlorine Content Of 49.5% ± 0.5
Color Value Max 100
Water Content 0.10% Max
Viscosity (25 ° C) 1500-1800 CPS
Acidity (Mg KOH / G 0.10 Max
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent
Smoke is the basic characteristic of polymer combustion. The smoke density not only reduces environmental visibility, but also brings inconvenience to disaster relief, and smoke is also the most lethal factor in fire. Data statistics show that 80% of the deaths in the fire are caused by smoke suffocation. Therefore, "flame retardant" and "smoke suppression" in flame retardant technology have been mentioned in the same breath. And for some types of plastic materials, such as PVC, smoke suppression is more important than flame retardant. It is an effective and economical way to solve the problem of smoke elimination by using common flame retardant and molybdenum compound.
Halogen free flame retardant of polyolefin has many advantages, such as low price, wide source, non-toxic, non corrosive, no two pollution during combustion. In order to reduce the harmful side effects of flame retardants, many countries are concentrating their efforts on the development of high-performance halogen-free flame retardants. Superfine, surface modified and microencapsulated halogen free flame retardants will become a new favorite in the plastics industry.
In short, the development trend of plastic flame retardants will be high efficiency, smoke suppression, non-toxic, cheap, and little impact on the use of plastic products. At present, special attention should be paid to various new inorganic flame retardants.
There are some flame retardants in the experiment were also studied, including: nylon matrix graft copolymer, nylon, nylon as flame retardant additives and high carbon additives, such as in nylon 6, 6 with high carbon additive PVA (polyvinyl alcohol), is conducive to high temperature dehydration and carbonization. However, the compatibility between PVA and nylon is poor, so PVA is oxidized by KMnO4 to form Mn chelate.
The nylon 6, 6 was added to the oxidized PVA by cone calorimeter. The peak rate of heat release was reduced from 1124kWm- 2 to 400 Wm- 2. Although nylon itself is flammable, in some cases, nylon and other polymers can improve the flame retardancy of the polymer. The synergistic effect of nylon 6 in the fiber is very important. As long as a few hundred ppm of phosphorus is added in the polyester, the flame retardant effect is obtained.
The use of flame retardants in plastics can enhance fire safety and reduce the risk of fire, which helps to solve the problems caused by combustion products. Compared with the blank experiment without flame retardant, the flame retardant provided a long time to escape from the fire, reduced the heat release and the production of toxic combustion products, while the material consumption was less, and there was no difference in the amount of raw smoke between the two. The research on the by-products of brominated flame retardants has not been done yet.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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