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Intumescent flame retardant for polyolefins
2017-11-16 15:32:01
Intumescent flame retardant for polyolefins
Traditional intumescent flame retardant is a kind of flame retardant system composed of acid source, carbon source and gas source. The flame retardant system has high flame retardant efficiency, no droplet, low smoke, non-toxic, non corrosive gas release characteristics, meet the requirements of environmentally friendly flame retardant system, polyolefin intumescent flame retardant is considered to be one of the development direction of halogen free flame retardant materials.
Ammonium polyphosphate is an important part of intumescent flame retardant, intumescent flame retardant polyolefin with acid source and dual function gas source, with the advantages of high phosphorus content, nitrogen content, good thermal stability, nearly neutral, good flame retardant effect, has become a hot research field of flame retardant technology domain. At present, the polymerization degree of ammonium polyphosphate is generally only tens. Therefore, ammonium polyphosphate has a certain water solubility, and the compatibility with polymer material is poor, can not meet the corresponding mechanical properties requirements.
Therefore, the 3 aspects of the intumescent flame retardant for polyolefin mainly focused on the following: (1) study on the synthetic methods and new technology, improve the degree of polymerization of ammonium polyphosphate; (2) to the existing ammonium polyphosphate product surface modification (or microcapsule); (3) the development of efficient expansion flame retardant synergistic agent. The purpose is to improve the flame retardant efficiency of intumescent flame retardant, reduce the cost and amount, improve the compatibility with organic materials, improve the anti dissolution performance of flame retardant and the decomposition temperature of ammonium polyphosphate in humid environment.
In this paper, the synergistic agents for intumescent flame retardants used in polyolefins are reviewed. Synergistic effect of intumescent flame retardant. Research on improving synergistic flame retardant series intumescent flame retardant flame retardant efficiency, reduce the amount of the beginning in 1990s, after nearly 20 years of development, the expansion theory and application of flame retardant synergist deeply, application fields are expanding, a strong impetus to the industrialization and commercial intumescent flame retardant system the application of the process.
Molecular sieves and other types of aluminosilicate. Molecular sieve is a kind of crystal aluminosilicate which is connected by SiO4- and AlO4- tetrahedron through oxygen bridge. They not only have uniform pore structure, large specific surface area, but also high surface polarity, which determines the molecular sieve not only has better adsorption, but also has a certain catalytic activity.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
(A Small Cabinet Loaded With 16 Tons), 1000KG / IB Bucket (A Small Cabinet Installed 18 Tons) Or 23 Tons (1, 3-Dichloro-2-Propyl) Phosphate (TDCPP) Packing: Net Weight 200KG / ISOTANK.
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.
The synergistic effect of molecular sieve on intumescent flame retardant system represented by Bourbigot is the most outstanding. They will be the first 4A molecular sieve used ammonium polyphosphate and pentaerythritol (PER) copolymer of maleic anhydride three expansion type flame retardant ethylene acrylic acid - Ding Ji, thermogravimetric analysis (TGA) found that adding to the molecular sieve material at high temperature (>550e) of P-31, C-13, stability, H-1 and A-l27 NMR spectra (NMR) show that the reaction of polymer and polymer additives can form more stable combustion of carbon layer. The 4A molecular sieve was used in the flame retardancy of polyolefin. The cone calorimeter analysis showed that the addition of molecular sieve changed the degradation process of the expanded carbon layer and made the carbon layer more stable.
Subsequently, researchers at home and abroad have carried out a more in-depth study of molecular sieves. Wei equality [4] using TGA and X ray photoelectron spectroscopy (XPS) study showed that in ammonium polyphosphate /PER flame retardant polypropylene (PP) system, below 250E, 4A molecular sieve with catalytic esterification of ammonium polyphosphate /PER system, accelerate the NH3, H2O and other gas phase volatile components, thus affecting the the swelling behavior of ammonium polyphosphate /PER system, improve the matching source and melt viscosity, which leads to the formation of high quality porous carbon layer, and the latter is the key to improve the flame retardant properties of polymers.
At high temperature, the 4A molecular sieve decomposes itself into SiO2 and Al2O3 under the action of organic phase of ammonium polyphosphate /PER, and finally generates Si-P-Al-C structure, which plays a role in promoting carbon deposition and stabilizing carbon deposition. Xia et al. Used 4A molecular sieves and ammonium polyphosphate / PER for flame retardant treatment of ABS, and obtained similar conclusions.
4A zeolite and ammonium polyphosphate /PER not only have good synergistic effect, but also help to improve the mechanical properties and processing performance of flame retardant system. Demir and other [6] used natural molecular sieve for ammonium polyphosphate /PER flame retardant system. Through the limit oxygen index and horizontal combustion test, it was found that natural molecular sieve and ammonium polyphosphate /PER flame retardant system also had synergistic effect.
Wang Jianqi will use the synergistic agent in PP/ ammonium polyphosphate /PER flame retardant system as SiO2 or Al2O3, that can make the limit oxygen index reached 35.5%, compared with the untreated PP, increased by 17%, TGA and cone calorimetry study showed that with molecular sieve cage structure of SiO2 or Al2O3 also has to promote the PP/ of ammonium polyphosphate /PER system of condensed phase fast and stable carbon carbon layer, reduce the effects of heat release and smoke release, the main factors that influence the physical structure of the aluminosilicate not intumescent flame retardant synergistic effect.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Traditional intumescent flame retardant is a kind of flame retardant system composed of acid source, carbon source and gas source. The flame retardant system has high flame retardant efficiency, no droplet, low smoke, non-toxic, non corrosive gas release characteristics, meet the requirements of environmentally friendly flame retardant system, polyolefin intumescent flame retardant is considered to be one of the development direction of halogen free flame retardant materials.
Ammonium polyphosphate is an important part of intumescent flame retardant, intumescent flame retardant polyolefin with acid source and dual function gas source, with the advantages of high phosphorus content, nitrogen content, good thermal stability, nearly neutral, good flame retardant effect, has become a hot research field of flame retardant technology domain. At present, the polymerization degree of ammonium polyphosphate is generally only tens. Therefore, ammonium polyphosphate has a certain water solubility, and the compatibility with polymer material is poor, can not meet the corresponding mechanical properties requirements.
Therefore, the 3 aspects of the intumescent flame retardant for polyolefin mainly focused on the following: (1) study on the synthetic methods and new technology, improve the degree of polymerization of ammonium polyphosphate; (2) to the existing ammonium polyphosphate product surface modification (or microcapsule); (3) the development of efficient expansion flame retardant synergistic agent. The purpose is to improve the flame retardant efficiency of intumescent flame retardant, reduce the cost and amount, improve the compatibility with organic materials, improve the anti dissolution performance of flame retardant and the decomposition temperature of ammonium polyphosphate in humid environment.
In this paper, the synergistic agents for intumescent flame retardants used in polyolefins are reviewed. Synergistic effect of intumescent flame retardant. Research on improving synergistic flame retardant series intumescent flame retardant flame retardant efficiency, reduce the amount of the beginning in 1990s, after nearly 20 years of development, the expansion theory and application of flame retardant synergist deeply, application fields are expanding, a strong impetus to the industrialization and commercial intumescent flame retardant system the application of the process.
Molecular sieves and other types of aluminosilicate. Molecular sieve is a kind of crystal aluminosilicate which is connected by SiO4- and AlO4- tetrahedron through oxygen bridge. They not only have uniform pore structure, large specific surface area, but also high surface polarity, which determines the molecular sieve not only has better adsorption, but also has a certain catalytic activity.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
(A Small Cabinet Loaded With 16 Tons), 1000KG / IB Bucket (A Small Cabinet Installed 18 Tons) Or 23 Tons (1, 3-Dichloro-2-Propyl) Phosphate (TDCPP) Packing: Net Weight 200KG / ISOTANK.
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.
The synergistic effect of molecular sieve on intumescent flame retardant system represented by Bourbigot is the most outstanding. They will be the first 4A molecular sieve used ammonium polyphosphate and pentaerythritol (PER) copolymer of maleic anhydride three expansion type flame retardant ethylene acrylic acid - Ding Ji, thermogravimetric analysis (TGA) found that adding to the molecular sieve material at high temperature (>550e) of P-31, C-13, stability, H-1 and A-l27 NMR spectra (NMR) show that the reaction of polymer and polymer additives can form more stable combustion of carbon layer. The 4A molecular sieve was used in the flame retardancy of polyolefin. The cone calorimeter analysis showed that the addition of molecular sieve changed the degradation process of the expanded carbon layer and made the carbon layer more stable.
Subsequently, researchers at home and abroad have carried out a more in-depth study of molecular sieves. Wei equality [4] using TGA and X ray photoelectron spectroscopy (XPS) study showed that in ammonium polyphosphate /PER flame retardant polypropylene (PP) system, below 250E, 4A molecular sieve with catalytic esterification of ammonium polyphosphate /PER system, accelerate the NH3, H2O and other gas phase volatile components, thus affecting the the swelling behavior of ammonium polyphosphate /PER system, improve the matching source and melt viscosity, which leads to the formation of high quality porous carbon layer, and the latter is the key to improve the flame retardant properties of polymers.
At high temperature, the 4A molecular sieve decomposes itself into SiO2 and Al2O3 under the action of organic phase of ammonium polyphosphate /PER, and finally generates Si-P-Al-C structure, which plays a role in promoting carbon deposition and stabilizing carbon deposition. Xia et al. Used 4A molecular sieves and ammonium polyphosphate / PER for flame retardant treatment of ABS, and obtained similar conclusions.
4A zeolite and ammonium polyphosphate /PER not only have good synergistic effect, but also help to improve the mechanical properties and processing performance of flame retardant system. Demir and other [6] used natural molecular sieve for ammonium polyphosphate /PER flame retardant system. Through the limit oxygen index and horizontal combustion test, it was found that natural molecular sieve and ammonium polyphosphate /PER flame retardant system also had synergistic effect.
Wang Jianqi will use the synergistic agent in PP/ ammonium polyphosphate /PER flame retardant system as SiO2 or Al2O3, that can make the limit oxygen index reached 35.5%, compared with the untreated PP, increased by 17%, TGA and cone calorimetry study showed that with molecular sieve cage structure of SiO2 or Al2O3 also has to promote the PP/ of ammonium polyphosphate /PER system of condensed phase fast and stable carbon carbon layer, reduce the effects of heat release and smoke release, the main factors that influence the physical structure of the aluminosilicate not intumescent flame retardant synergistic effect.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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