News Details
Polyolefine flame retardants
2017-11-12 14:59:41
Polyolefine flame retardants
The commonly used polyolefin flame retardants are organic compounds containing phosphorus, bromine and chlorine, nitrogen flame retardant elements, especially organic phosphorus compounds is adding a flame retardant polyolefin is widely used in the research of flame retardant agent. They have high efficiency, low viscosity, flame retardant polyether polyol and good compatibility, thermal stability and moderate anti coking etc..
Add halogen flame retardant polyolefin type flame retardants mainly include chlorine and bromine in two categories. The brominated flame retardant because of its low dosage, good thermal stability and high flame retardant efficiency and become the world's largest production of flame retardant. Halogen flame retardant in the heat generated by the decomposition of hydrogen halide HX, HX flame retardant effect by two kinds of mechanism.
Halogen flame retardant has gradually been eliminated, is a free radical mechanism, consumption of free radical HO polymer degradation, to reduce the concentration and chain reaction to delay or interruption of combustion; two is the surface coverage mechanism, hydrogen halide a nonflammable gas density than air, can form a barrier on the surface of the polymer so, the combustible gas concentration decreased, thereby slowing the burning speed and even make the fire. Here is the latest research on the cooperative system of halogen flame retardant.
Add more commonly used flame retardant flame retardant polyolefin synergistic flame retardant and system is solid liquid flame retardant. The solid flame retardant materials and flame retardant liquid viscosity increase, reduce material viscosity; the combination of the two can also be used to adjust the viscosity of the reaction materials, high flame retardant PUF.
Used to reinforce the main purpose of RPU is to improve the material's modulus of elasticity, dimensional stability and heat resistance, reduce the molding process of shrinkage ratio. Due to higher prices of main raw materials of polyurethane, after adding fillers can reduce the cost.
The use of filler has many advantages, but the adverse effects of RPU is the biggest reduced the impact performance. From the historical point of view the development of glass fiber filler, and hollow glass beads has been the main research object reinforced polyurethane system, the reason is that the glass fiber and hollow glass beads to significantly increase the modulus. But the addition of glass fiber after the processing performance worse, such as the mass fraction was about 30%, the length of 1.5 mm short cut glass fiber, the viscosity of the system is the same amount, size is 50 times 100 PM mica filler. Hollow glass bead good processing performance, can improve the comprehensive mechanical properties of RPU, but the enhancement effect on foam mainly depends on the characteristics of high modulus, the polyurethane elastomer system enhancement effect of hollow glass bead is not very obvious, if its size is further reduced, not only make the process difficult, but will reduce specific modulus, so the development potential is limited.
The adhesive composite surface treated with coupling agent to improve the interface has been widely used. The preparation must be on the glass fiber surface treatment before the glass fiber reinforced plastics. Otherwise, the preparation of glass fiber reinforced plastic layer easily. On the surface of glass fiber, surface treatment is generally treated with coupling agent.
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 coupling agent can not only improve the interfacial adhesion of composites, and the effect of wet conditions in electrical and mechanical properties were significantly. It is a kind of material with two different functional groups, a part of the molecule is the organic functional groups may react with the polymer surface, another part of functional groups and inorganic compounds showed good reactivity, strong adhesion formation. Effect of coupling agent in the composite is between the reinforced material and resin matrix to form an interface layer, interface layer can transfer the stress, thus enhanced adhesion strength between the material and the resin matrix, improving the performance of the composite material, but also can prevent other medium to the interface permeability, improve the interfacial state. Is conducive to the product of aging resistance, mechanical and electrical insulation performance.
The mechanism of titanate coupling agent is more complex, there are quite a lot of research, proposed a single molecular layer theory, the chemical bond theory, infiltration effect and surface energy theory and other theories, but has not yet completely unified.
The silane coupling agent is the earliest application and study of the coupling agent. The general formula of silane coupling agent RnSiX (4-N).
Modified by KH550 in this experiment. Molecules containing two different active groups of amino and hydroxyl groups, can be used for coupling of organic polymer and inorganic filler, enhance the adhesion, improve product performance. Used in glass fiber, casting, textile auxiliaries.
Application of polymer with epoxy, phenolic, melamine, nylon, PVC, polyurethane, polyacrylic acid, nitrile rubber etc..
The glass bead chopped glass fiber bundles immersed in coupling agent solution, remove and drying at 150 DEG C, then adding a combined material mixing, adding isocyanate foaming molding vinegar.
The flame retardant coupling agent in ethanol solution soak for two hours, then drying at 60 DEG C, then adding A components.
Rigid polyurethane foam by polyol, isocyanate and various additives prepared, has excellent physical and mechanical properties, acoustic properties, electrical properties and chemical resistance. Especially the very low thermal conductivity so that its insulation performance is far superior to other similar plastic, so it is mainly used for insulation industry. With the continuous improvement of its mechanical strength, as a structural material for supporting and filling the prospects will be more broad.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The commonly used polyolefin flame retardants are organic compounds containing phosphorus, bromine and chlorine, nitrogen flame retardant elements, especially organic phosphorus compounds is adding a flame retardant polyolefin is widely used in the research of flame retardant agent. They have high efficiency, low viscosity, flame retardant polyether polyol and good compatibility, thermal stability and moderate anti coking etc..
Add halogen flame retardant polyolefin type flame retardants mainly include chlorine and bromine in two categories. The brominated flame retardant because of its low dosage, good thermal stability and high flame retardant efficiency and become the world's largest production of flame retardant. Halogen flame retardant in the heat generated by the decomposition of hydrogen halide HX, HX flame retardant effect by two kinds of mechanism.
Halogen flame retardant has gradually been eliminated, is a free radical mechanism, consumption of free radical HO polymer degradation, to reduce the concentration and chain reaction to delay or interruption of combustion; two is the surface coverage mechanism, hydrogen halide a nonflammable gas density than air, can form a barrier on the surface of the polymer so, the combustible gas concentration decreased, thereby slowing the burning speed and even make the fire. Here is the latest research on the cooperative system of halogen flame retardant.
Add more commonly used flame retardant flame retardant polyolefin synergistic flame retardant and system is solid liquid flame retardant. The solid flame retardant materials and flame retardant liquid viscosity increase, reduce material viscosity; the combination of the two can also be used to adjust the viscosity of the reaction materials, high flame retardant PUF.
Used to reinforce the main purpose of RPU is to improve the material's modulus of elasticity, dimensional stability and heat resistance, reduce the molding process of shrinkage ratio. Due to higher prices of main raw materials of polyurethane, after adding fillers can reduce the cost.
The use of filler has many advantages, but the adverse effects of RPU is the biggest reduced the impact performance. From the historical point of view the development of glass fiber filler, and hollow glass beads has been the main research object reinforced polyurethane system, the reason is that the glass fiber and hollow glass beads to significantly increase the modulus. But the addition of glass fiber after the processing performance worse, such as the mass fraction was about 30%, the length of 1.5 mm short cut glass fiber, the viscosity of the system is the same amount, size is 50 times 100 PM mica filler. Hollow glass bead good processing performance, can improve the comprehensive mechanical properties of RPU, but the enhancement effect on foam mainly depends on the characteristics of high modulus, the polyurethane elastomer system enhancement effect of hollow glass bead is not very obvious, if its size is further reduced, not only make the process difficult, but will reduce specific modulus, so the development potential is limited.
The adhesive composite surface treated with coupling agent to improve the interface has been widely used. The preparation must be on the glass fiber surface treatment before the glass fiber reinforced plastics. Otherwise, the preparation of glass fiber reinforced plastic layer easily. On the surface of glass fiber, surface treatment is generally treated with coupling agent.
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 coupling agent can not only improve the interfacial adhesion of composites, and the effect of wet conditions in electrical and mechanical properties were significantly. It is a kind of material with two different functional groups, a part of the molecule is the organic functional groups may react with the polymer surface, another part of functional groups and inorganic compounds showed good reactivity, strong adhesion formation. Effect of coupling agent in the composite is between the reinforced material and resin matrix to form an interface layer, interface layer can transfer the stress, thus enhanced adhesion strength between the material and the resin matrix, improving the performance of the composite material, but also can prevent other medium to the interface permeability, improve the interfacial state. Is conducive to the product of aging resistance, mechanical and electrical insulation performance.
The mechanism of titanate coupling agent is more complex, there are quite a lot of research, proposed a single molecular layer theory, the chemical bond theory, infiltration effect and surface energy theory and other theories, but has not yet completely unified.
The silane coupling agent is the earliest application and study of the coupling agent. The general formula of silane coupling agent RnSiX (4-N).
Modified by KH550 in this experiment. Molecules containing two different active groups of amino and hydroxyl groups, can be used for coupling of organic polymer and inorganic filler, enhance the adhesion, improve product performance. Used in glass fiber, casting, textile auxiliaries.
Application of polymer with epoxy, phenolic, melamine, nylon, PVC, polyurethane, polyacrylic acid, nitrile rubber etc..
The glass bead chopped glass fiber bundles immersed in coupling agent solution, remove and drying at 150 DEG C, then adding a combined material mixing, adding isocyanate foaming molding vinegar.
The flame retardant coupling agent in ethanol solution soak for two hours, then drying at 60 DEG C, then adding A components.
Rigid polyurethane foam by polyol, isocyanate and various additives prepared, has excellent physical and mechanical properties, acoustic properties, electrical properties and chemical resistance. Especially the very low thermal conductivity so that its insulation performance is far superior to other similar plastic, so it is mainly used for insulation industry. With the continuous improvement of its mechanical strength, as a structural material for supporting and filling the prospects will be more broad.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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