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Synergistic flame retardancy of polyurethane flame retardant
2017-11-12 14:59:31
Synergistic flame retardancy of polyurethane flame retardant
This paper introduces the synergistic flame retardant of some polyurethane flame retardants, that is, two or more than two components of the flame retardant system, as long as the proper choice, the flame retardant effect is better than the sum of flame retardant components.
In the technology of flame retardant, flame retardant synergistic flame retardant polyurethane to choose more and more, because not only to improve the flame retardancy of the flame retardant polymer efficiency, but also can reduce the content of some components of fire retardant system, meet the requirements under the premise of flame retardant and good cost control.
At present, the most common flame-retardant polyurethane flame retardant synergistic flame retardant is halogen compounds and three antimony oxide two, but in some fire retardant materials, three oxidation two antimony can also be made of iron oxide, zinc borate, Zinc Oxide to replace them, in particular chlorinated flame retardant epoxy resin and polyamide in this kind of synergistic agent not only can capture free radicals in the gas phase, but also play a role in the condensed phase, the carbon layer formed on the surface of flame retardant materials.
According to previous experience, synergistic flame retardant polyurethane flame retardant for aliphatic chlorine based flame retardant synergistic agent is the most effective in the synergistic effect of ferric oxide, it is even better than some plastic three two antimony oxide. With Zinc Oxide as some halogen flame retardant, the synergistic agent can give high CTI (leakage track index) value of flame retardant substrate. When zinc stannate, zinc molybdate, zinc silicate and zinc borate composite are used as synergistic agents for halogen flame retardants, the UL94 flame retardant grade and CTI value of some plastics are improved in two aspects, which are better than that of three oxidation two antimony.
The three and two antimony oxide zinc borate and flame retardant materials, can slow down the smoldering, and improve the color of flame retardant materials.
Halogen flame retardants in flame retardant polystyrene, ABS and some other plastics can be made of antimony oxide inorganic silicate compound as a synergistic agent, which is not only low cost, but also low in hue intensity. In addition, antimony compound, magnesium compound zinc compound compound as synergist can not only improve flame retardancy, but also inhibit smoke.
Zinc stearate / Talc / iron compound is a low smoke synergistic agent. Adding proper amount of this synergistic agent can reduce the initial 4min smoke density from 300 to 100, and the light transmittance increases from 0.01% to 0.1%.
Some plastic HIPS and ABS, there are also synergistic effect between the brominated flame retardant agent and flame retardant such as chlorine, chlorine with aliphatic flame retardant mixture and decabromodiphenyl oxide to flame retardant ABS, the proportion of two for 1:1, the oxygen index of the ABS reached more than 40.
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
Because many kinds of phosphorus compounds have flame retardant effect, the researchers have done a lot of research on the practical application and mechanism of phosphorus compounds as epoxy resin flame retardants. Many patents claim that phosphorus and bromine have synergistic effects, but careful studies have shown that the use of phosphorus compounds and bromine compounds has a good effect on flame retardancy, but not necessarily synergistic effect.
Some reports show that as the reactive flame retardant organic phosphorus three alcohols and diols or brominated flame retardant and can receive significant effect. The growth rate is not the use of reactive flame retardant conditions. The phosphorus - bromine system reactive flame retardant epoxy resin used in printed circuit board, with its remarkable advantages: its good dimensional stability. Good heat resistance. Also can greatly reduce the amount of bromine.
For example, the original 52 copies. Four tetrabromobisphenol A formula, by adding 35 phr of phosphorous glycol or glycol, the dosage can be reduced to 28 and still can reach UL - 94V - 0 level requirements. The thermal stability can be increased from 2.5min to 5.0min at the welding temperature (about 300 degrees C).
Synergy is a physical and chemical phenomenon, also known as synergism. It means that two or more than two components are added together or mixed together, and the effect is greater than the sum of the actions of various components. And the substance that produces this effect on the mixture is called synergist (synergist). Synergistic effect is often used to guide the combination of chemical products, so as to obtain the final product performance enhancement.
It is reported that APP with 30.5% P content and pentaerythritol have higher flame retardancy. At the same time, AP has good synergistic effect with metal oxides (such as manganese dioxide), inorganic filler (Fei Shi) and other flame retardants.
A small amount of flame retardant synergist can improve the properties of aluminum hydroxide filling material, such as inhibiting dripping and improving mechanical properties. With aluminum hydroxide can play a range of inorganic flame retardant synergist synergistic effect is very wide, mainly in metal oxide and zinc borate and phosphorus compounds (red phosphorus, phosphate), silicon compounds, metal nitrate (copper nitrate, silver nitrate, ammonium polyphosphate etc.).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
This paper introduces the synergistic flame retardant of some polyurethane flame retardants, that is, two or more than two components of the flame retardant system, as long as the proper choice, the flame retardant effect is better than the sum of flame retardant components.
In the technology of flame retardant, flame retardant synergistic flame retardant polyurethane to choose more and more, because not only to improve the flame retardancy of the flame retardant polymer efficiency, but also can reduce the content of some components of fire retardant system, meet the requirements under the premise of flame retardant and good cost control.
At present, the most common flame-retardant polyurethane flame retardant synergistic flame retardant is halogen compounds and three antimony oxide two, but in some fire retardant materials, three oxidation two antimony can also be made of iron oxide, zinc borate, Zinc Oxide to replace them, in particular chlorinated flame retardant epoxy resin and polyamide in this kind of synergistic agent not only can capture free radicals in the gas phase, but also play a role in the condensed phase, the carbon layer formed on the surface of flame retardant materials.
According to previous experience, synergistic flame retardant polyurethane flame retardant for aliphatic chlorine based flame retardant synergistic agent is the most effective in the synergistic effect of ferric oxide, it is even better than some plastic three two antimony oxide. With Zinc Oxide as some halogen flame retardant, the synergistic agent can give high CTI (leakage track index) value of flame retardant substrate. When zinc stannate, zinc molybdate, zinc silicate and zinc borate composite are used as synergistic agents for halogen flame retardants, the UL94 flame retardant grade and CTI value of some plastics are improved in two aspects, which are better than that of three oxidation two antimony.
The three and two antimony oxide zinc borate and flame retardant materials, can slow down the smoldering, and improve the color of flame retardant materials.
Halogen flame retardants in flame retardant polystyrene, ABS and some other plastics can be made of antimony oxide inorganic silicate compound as a synergistic agent, which is not only low cost, but also low in hue intensity. In addition, antimony compound, magnesium compound zinc compound compound as synergist can not only improve flame retardancy, but also inhibit smoke.
Zinc stearate / Talc / iron compound is a low smoke synergistic agent. Adding proper amount of this synergistic agent can reduce the initial 4min smoke density from 300 to 100, and the light transmittance increases from 0.01% to 0.1%.
Some plastic HIPS and ABS, there are also synergistic effect between the brominated flame retardant agent and flame retardant such as chlorine, chlorine with aliphatic flame retardant mixture and decabromodiphenyl oxide to flame retardant ABS, the proportion of two for 1:1, the oxygen index of the ABS reached more than 40.
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
Because many kinds of phosphorus compounds have flame retardant effect, the researchers have done a lot of research on the practical application and mechanism of phosphorus compounds as epoxy resin flame retardants. Many patents claim that phosphorus and bromine have synergistic effects, but careful studies have shown that the use of phosphorus compounds and bromine compounds has a good effect on flame retardancy, but not necessarily synergistic effect.
Some reports show that as the reactive flame retardant organic phosphorus three alcohols and diols or brominated flame retardant and can receive significant effect. The growth rate is not the use of reactive flame retardant conditions. The phosphorus - bromine system reactive flame retardant epoxy resin used in printed circuit board, with its remarkable advantages: its good dimensional stability. Good heat resistance. Also can greatly reduce the amount of bromine.
For example, the original 52 copies. Four tetrabromobisphenol A formula, by adding 35 phr of phosphorous glycol or glycol, the dosage can be reduced to 28 and still can reach UL - 94V - 0 level requirements. The thermal stability can be increased from 2.5min to 5.0min at the welding temperature (about 300 degrees C).
Synergy is a physical and chemical phenomenon, also known as synergism. It means that two or more than two components are added together or mixed together, and the effect is greater than the sum of the actions of various components. And the substance that produces this effect on the mixture is called synergist (synergist). Synergistic effect is often used to guide the combination of chemical products, so as to obtain the final product performance enhancement.
It is reported that APP with 30.5% P content and pentaerythritol have higher flame retardancy. At the same time, AP has good synergistic effect with metal oxides (such as manganese dioxide), inorganic filler (Fei Shi) and other flame retardants.
A small amount of flame retardant synergist can improve the properties of aluminum hydroxide filling material, such as inhibiting dripping and improving mechanical properties. With aluminum hydroxide can play a range of inorganic flame retardant synergist synergistic effect is very wide, mainly in metal oxide and zinc borate and phosphorus compounds (red phosphorus, phosphate), silicon compounds, metal nitrate (copper nitrate, silver nitrate, ammonium polyphosphate etc.).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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