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Intumescent flame retardant for PP
2017-11-18 11:26:38
Intumescent flame retardant for PP
The intumescent flame retardant system for PP mainly consists of three parts: phosphorus source, acid source and gas source. Intumescent flame retardants used in PP are composed of ammonium polyphosphate (APP) and polyols such as PER and melamine (M). When the APP is decomposed, the phosphoric acid and pyrophosphate are dehydrated to make the polyol esterified, dehydrated and carbonized, and the water vapor and ammonia produced by the reaction form a porous carbon layer, so that the carbon layer expands to achieve the purpose of flame retardant.
PP intumescent flame retardant must have the following properties: A has good thermal stability, can withstand high temperature above 200 degrees Celsius in polymer processing; a large number of volatile substances without thermal degradation of B release of the expansion of the adverse effects of the foaming process; C in the polymer to form a layer of uniform distribution, completely covered in the expansion of carbon material surface in the combustion of materials; D and PP have good compatibility, no adverse effect and additive, but the deterioration of physical properties of the material.
The advantages of intumescent flame retardants are halogen free, antimony free, low smoke, low toxic and non corrosive gases. The carbon layer generated can prevent the droplet from dropping and spreading the fire.
The composition of intumescent flame retardant system in PP has a great influence on the flame retardant effect and the processing viscosity of flame retardant PP. The optimum ratio between the optimized components can obtain the best flame retardant effect and reduce the processing viscosity of the system. M (APP) m (M) m (PER) = (15~25) (10~20) (0.5~1.5) at PP with good flame retardant, intumescent flame retardant components on rheological properties of flame retardant PP and APP M have different effects, increasing the amount of the flame retardant PP viscosity increase, while the increase of the amount of PER the lower the viscosity of flame retardant PP.
In order to improve the performance of intumescent flame retardant for PP, some properties of the intumescent flame retardant in PP can be partially replaced by other materials. Study on starch containing intumescent flame retardant PP system of flame retardant and flue gas release behavior indicated that the starch containing intumescent flame retardant (flame retardant S-PP) can significantly reduce the maximum heat release rate of PP, total heat release and the average effective heat of combustion, showed good flame retardant, starch can partly replace PER as PP with the expansion of charring agent type flame retardant in flame retardant without affecting its.
The formation of expanded carbon layer reduces the thermal degradation rate of PP, which is the key to reduce the rate of heat release and the rate of smoke generation. Because of the poor compatibility of PP with intumescent flame retardant and PP, and the melting of PER at PP processing temperature, the processing properties of flame retardant materials are affected. Using nylon 6 (PA6) instead of some PER as carbon agent, the intumescent flame retardant PP used for PP has good mechanical properties and thermal stability. In addition, PA-6EVA nanocomposites as carbon promoter can improve the combustion and mechanical properties of flame retardant PP.
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
Adding some substance into intumescent flame retardant as catalyst for expansion system in PP can improve flame retardancy. As a catalyst, formic acid nickel salt can effectively improve the flame retardancy of APPPERM based PP intumescent system. The catalyst (0.1%~5%) increases the LOI (Ultimate Oxygen Index) of the system, alters the microstructure of the residual and improves the thermal stability of the system. Zinc borate has synergistic flame retardant effect. It can form a carbon structure with PP with intumescent flame retardant, which is beneficial to improve the flame retardancy of PP. Wei Ping studied 4 kinds of molecular sieve expansion and thermal degradation behavior of flame retardant in APPPER, found that adding molecular sieve system, thermal weight loss rate decreased, thermal weight loss rate peak shifts; high temperature molecular sieve can be confirmed as catalyst expansion flame retardant system, can promote the crosslinking and charring, improved flame retardant system behavior.
In order to solve the moisture absorption problem of intumescent flame retardant used in PP, the microencapsulation of vinyl acetate copolymer with vinyl acetate copolymer was carried out, which not only improved the moisture resistance of intumescent flame retardant PP for PP, but also improved the compatibility between intumescent flame retardant and PP for PP. The intumescent flame retardant PP prepared by this method can significantly improve the compatibility with PP, and has the properties of flame retardancy, moisture resistance and toughening.
Ou Yuxiang synthesized flame retardant PP with intumescent flame retardants based on two bicyclic caged phosphate Trimer and PEPA groups. It was found that the heat release rate, total heat release rate and mass loss rate of flame retardant PP were reduced by about 70%, 60% and 50%, respectively, compared with those of pure PP, PP.
In recent years, another kind of halogen free inorganic expansion system has been developed: expanded graphite, which can expand hundreds of times along the C axis of crystalline structure at high temperature. It has the characteristics of cheap, low smoke and rich resources. Good comprehensive flame retardancy can be obtained by blending expanded graphite with organic expansion system. When the expanded graphite was introduced into PP-PP, the flame retardancy and thermal stability of the intumescent flame retardant system were improved.
The compatibility of PP and PP with intumescent flame retardant is very important to the dispersion and flame retardant effect of flame retardant and the mechanical properties of PP. Ma Zhi Ling effect of coupling agent was investigated three kinds of functionalized PP- methacrylic acid grafted maleic anhydride grafted PP, two PP and PP PP used as etching intumescent flame retardant PP system on properties of selected coupling agent and PP as two crystal structures of the same can theeutectic phenomenon, which is conducive to to improve the compatibility of the system. Choose the reaction end containing with reactive H groups, and PP with intumescent flame retardant particles on the surface of the NH group, OH reaction, the other end and the base material containing oily group of good compatibility, through surface grafting method using PP intumescent flame retardant microcapsule, this technology enhances the flame retardant and PP the compatibility of blends and pseudoplastic fluid.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The intumescent flame retardant system for PP mainly consists of three parts: phosphorus source, acid source and gas source. Intumescent flame retardants used in PP are composed of ammonium polyphosphate (APP) and polyols such as PER and melamine (M). When the APP is decomposed, the phosphoric acid and pyrophosphate are dehydrated to make the polyol esterified, dehydrated and carbonized, and the water vapor and ammonia produced by the reaction form a porous carbon layer, so that the carbon layer expands to achieve the purpose of flame retardant.
PP intumescent flame retardant must have the following properties: A has good thermal stability, can withstand high temperature above 200 degrees Celsius in polymer processing; a large number of volatile substances without thermal degradation of B release of the expansion of the adverse effects of the foaming process; C in the polymer to form a layer of uniform distribution, completely covered in the expansion of carbon material surface in the combustion of materials; D and PP have good compatibility, no adverse effect and additive, but the deterioration of physical properties of the material.
The advantages of intumescent flame retardants are halogen free, antimony free, low smoke, low toxic and non corrosive gases. The carbon layer generated can prevent the droplet from dropping and spreading the fire.
The composition of intumescent flame retardant system in PP has a great influence on the flame retardant effect and the processing viscosity of flame retardant PP. The optimum ratio between the optimized components can obtain the best flame retardant effect and reduce the processing viscosity of the system. M (APP) m (M) m (PER) = (15~25) (10~20) (0.5~1.5) at PP with good flame retardant, intumescent flame retardant components on rheological properties of flame retardant PP and APP M have different effects, increasing the amount of the flame retardant PP viscosity increase, while the increase of the amount of PER the lower the viscosity of flame retardant PP.
In order to improve the performance of intumescent flame retardant for PP, some properties of the intumescent flame retardant in PP can be partially replaced by other materials. Study on starch containing intumescent flame retardant PP system of flame retardant and flue gas release behavior indicated that the starch containing intumescent flame retardant (flame retardant S-PP) can significantly reduce the maximum heat release rate of PP, total heat release and the average effective heat of combustion, showed good flame retardant, starch can partly replace PER as PP with the expansion of charring agent type flame retardant in flame retardant without affecting its.
The formation of expanded carbon layer reduces the thermal degradation rate of PP, which is the key to reduce the rate of heat release and the rate of smoke generation. Because of the poor compatibility of PP with intumescent flame retardant and PP, and the melting of PER at PP processing temperature, the processing properties of flame retardant materials are affected. Using nylon 6 (PA6) instead of some PER as carbon agent, the intumescent flame retardant PP used for PP has good mechanical properties and thermal stability. In addition, PA-6EVA nanocomposites as carbon promoter can improve the combustion and mechanical properties of flame retardant PP.
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
Adding some substance into intumescent flame retardant as catalyst for expansion system in PP can improve flame retardancy. As a catalyst, formic acid nickel salt can effectively improve the flame retardancy of APPPERM based PP intumescent system. The catalyst (0.1%~5%) increases the LOI (Ultimate Oxygen Index) of the system, alters the microstructure of the residual and improves the thermal stability of the system. Zinc borate has synergistic flame retardant effect. It can form a carbon structure with PP with intumescent flame retardant, which is beneficial to improve the flame retardancy of PP. Wei Ping studied 4 kinds of molecular sieve expansion and thermal degradation behavior of flame retardant in APPPER, found that adding molecular sieve system, thermal weight loss rate decreased, thermal weight loss rate peak shifts; high temperature molecular sieve can be confirmed as catalyst expansion flame retardant system, can promote the crosslinking and charring, improved flame retardant system behavior.
In order to solve the moisture absorption problem of intumescent flame retardant used in PP, the microencapsulation of vinyl acetate copolymer with vinyl acetate copolymer was carried out, which not only improved the moisture resistance of intumescent flame retardant PP for PP, but also improved the compatibility between intumescent flame retardant and PP for PP. The intumescent flame retardant PP prepared by this method can significantly improve the compatibility with PP, and has the properties of flame retardancy, moisture resistance and toughening.
Ou Yuxiang synthesized flame retardant PP with intumescent flame retardants based on two bicyclic caged phosphate Trimer and PEPA groups. It was found that the heat release rate, total heat release rate and mass loss rate of flame retardant PP were reduced by about 70%, 60% and 50%, respectively, compared with those of pure PP, PP.
In recent years, another kind of halogen free inorganic expansion system has been developed: expanded graphite, which can expand hundreds of times along the C axis of crystalline structure at high temperature. It has the characteristics of cheap, low smoke and rich resources. Good comprehensive flame retardancy can be obtained by blending expanded graphite with organic expansion system. When the expanded graphite was introduced into PP-PP, the flame retardancy and thermal stability of the intumescent flame retardant system were improved.
The compatibility of PP and PP with intumescent flame retardant is very important to the dispersion and flame retardant effect of flame retardant and the mechanical properties of PP. Ma Zhi Ling effect of coupling agent was investigated three kinds of functionalized PP- methacrylic acid grafted maleic anhydride grafted PP, two PP and PP PP used as etching intumescent flame retardant PP system on properties of selected coupling agent and PP as two crystal structures of the same can theeutectic phenomenon, which is conducive to to improve the compatibility of the system. Choose the reaction end containing with reactive H groups, and PP with intumescent flame retardant particles on the surface of the NH group, OH reaction, the other end and the base material containing oily group of good compatibility, through surface grafting method using PP intumescent flame retardant microcapsule, this technology enhances the flame retardant and PP the compatibility of blends and pseudoplastic fluid.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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