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Inorganic inorganic flame retardant for Polypropylene
2017-11-17 11:49:04
Inorganic inorganic flame retardant for Polypropylene
Metal hydroxides, such as Al (OH) 3 and Mg (OH) 2, are another class of inorganic flame retardants which are widely used.
Riva study found that polypropylene with hydroxide inorganic flame retardant Mg (OH) 2 with ammonium polyphosphate and PA6 CO for ethylene vinyl acetate copolymer (EVA) flame retardant, flame retardant system has better performance, mainly due to Mg (OH) 2 and ammonium polyphosphate on degradation in interaction. Mg (OH) 2 to promote the release of NH3 degradation when poly ammonium phosphate.
Castrovinci by cone calorimetry analysis showed that in flame retardant styrene butadiene rubber, ammonium polyphosphate than polypropylene with hydroxide inorganic flame retardant Al (OH) 3 is more effective, the addition of 60% Al (OH) 3 can reach 12% when the addition of ammonium polyphosphate flame retardant effect, and 1% Al (OH) 3 addition of Poly ammonium phosphate styrene butadiene rubber, had obvious antagonistic effect.
By studying the interaction between styrene butadiene rubber and Al (OH) 3 and ammonium polyphosphate, it is found that the formation of aluminum phosphate has an adverse effect on the flame retardant system using ammonium polyphosphate alone. The antagonism between Al (OH) 3 and ammonium polyphosphate used in the flame retardancy of styrene butadiene rubber is obvious. Therefore, it is necessary to make a further study on the synergistic flame retardant of different polymer systems with polypropylene based inorganic flame retardant and ammonium polyphosphate as the main expansion system.
Layered double hydroxides (LDH) have become another hot spot in the study of synergistic effects of intumescent systems in recent years. The results show that the single LDH can not improve the flame retardancy of the polymer, but the intumescent flame retardant system such as ammonium polyphosphate can obviously improve the flame retardant efficiency and reduce the adverse effects on the mechanical properties. Xu Jianhua and other nano LDH and ammonium polyphosphate in a certain range of composite used in PA6/PP blends, can produce good synergistic flame retardant effect.
Synergistic effects may be due to the LDH release amount of gas of the intumescent flame retardant system required in the heating process, Al Mg composite oxide generated at the same time not only has a large specific surface area, but also has strong alkaline catalysis, and therefore can acid ammonium polyphosphate ammonium polyphosphate full role, promote better catalytic PA6/PP rapid dehydration, crosslinking and charring material, so as to realize the acid source, carbon source and gas source the best match, effectively play the role of condensed phase flame retardant.
Triphenyl Phosphate (TPP)
Flame retardant tpp This product has good transparency , flexibility and good benefits antimicrobial resistance, with water, oil, electrical insulation and compatibility. Mainly for the cellulose resin, a vinyl resin, natural rubber and synthetic rubber flame retardant plasticizers may also be used for acetate and glycerol triacetate film thin , rigid polyurethane foam , phenolic resin, and engineering plastics such as resistance PPO burning plasticized . Flame Retardant tpp manufacturer price mainly in Jiangsu .
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
Wang Guancai et al. Used brucite, Al (OH) 3 and ammonium polyphosphate for flame retarded unsaturated polyester resin (UPR). The results showed that the flame retardant system, brucite, Al (OH) synergistic effects was 3, ammonium polyphosphate in three, brucite /Al (OH) 3/ ammonium polyphosphate as composite flame retardant, 2/1/1 content is 40%, the limit oxygen index of the composite is 33.8%, vertical the combustion of FV-0, smoke density rating of 56.74, able to meet the national B1 level electrical requirements of thermosetting plastics.
Zhang and so on in aqueous solution will ammonium polyphosphate, PER and other inserted into the interlayer of LDH, and then the flame retardant treatment of PP, compared with the traditional mixing method, the new treatment method of flame retardant PP has better light transmittance and mechanical properties. When the dosage is 30%, the limit oxygen index reaches 31%, and the UL94 test reaches V1 level.
Zhao LDH and poly ammonium phosphate used in flame retardant treatment, the PVA study found that the amount of composite flame retardant is 15%, with the content of LDH increased gradually in the range of 0.1%~10%, the limiting oxygen index reached 33% and the level of UL94V0, compared with PP/ poly ammonium phosphate system, the addition of LDH improves the decomposition temperature and mechanical properties of the system.
Zhang of the two valence cation containing different LDH synergistic flame retardant PP/ intumescent flame retardant system, the results show that the LDH can achieve a nanometer size in the system, LDH and synergistic effect of ammonium polyphosphate, so that the limit oxygen index increases, heat release rate, total heat release and production the smoke was obviously decreased, especially with Zn 2+ or Cu2+ LDH to limit oxygen index system reached 33%, V0 by UL94 test. LDH can obviously improve the thermal stability of the flame retardant system and form a more solid carbon layer.
Xie believed that compounds such as acetyl acetone and oligomeric salicylaldehyde some metal complexes of Cu (o), Co (o), Ni (o) complexes can be used not only as a free radical inhibitor, but also catalytic charring, so the low density polyethylene metal complexes used in the expansion system of flame retardant (PE-LD). Can greatly improve the samples when 400~650e char, reduce the flammability of degradation products, effectively improve the flame retardant properties of materials.
Wang the metal complexes used in polyvinyl alcohol (PVA) intumescent flame retardant system, found that when adding 0.5% metal complexes, can significantly improve the flame retardant performance, the thermal degradation of TGA, SEM and FTIR of the polymer and study of char morphology showed that SALICYLALDOXIME with nickel (NiSAO) thermal stability to improve PVA/ intumescent flame retardant system, char containing phosphoric acid or polyphosphoric acid, continuous dense carbon layer can prevent the combustion process of heat transfer, improve the flame retardant performance of materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Metal hydroxides, such as Al (OH) 3 and Mg (OH) 2, are another class of inorganic flame retardants which are widely used.
Riva study found that polypropylene with hydroxide inorganic flame retardant Mg (OH) 2 with ammonium polyphosphate and PA6 CO for ethylene vinyl acetate copolymer (EVA) flame retardant, flame retardant system has better performance, mainly due to Mg (OH) 2 and ammonium polyphosphate on degradation in interaction. Mg (OH) 2 to promote the release of NH3 degradation when poly ammonium phosphate.
Castrovinci by cone calorimetry analysis showed that in flame retardant styrene butadiene rubber, ammonium polyphosphate than polypropylene with hydroxide inorganic flame retardant Al (OH) 3 is more effective, the addition of 60% Al (OH) 3 can reach 12% when the addition of ammonium polyphosphate flame retardant effect, and 1% Al (OH) 3 addition of Poly ammonium phosphate styrene butadiene rubber, had obvious antagonistic effect.
By studying the interaction between styrene butadiene rubber and Al (OH) 3 and ammonium polyphosphate, it is found that the formation of aluminum phosphate has an adverse effect on the flame retardant system using ammonium polyphosphate alone. The antagonism between Al (OH) 3 and ammonium polyphosphate used in the flame retardancy of styrene butadiene rubber is obvious. Therefore, it is necessary to make a further study on the synergistic flame retardant of different polymer systems with polypropylene based inorganic flame retardant and ammonium polyphosphate as the main expansion system.
Layered double hydroxides (LDH) have become another hot spot in the study of synergistic effects of intumescent systems in recent years. The results show that the single LDH can not improve the flame retardancy of the polymer, but the intumescent flame retardant system such as ammonium polyphosphate can obviously improve the flame retardant efficiency and reduce the adverse effects on the mechanical properties. Xu Jianhua and other nano LDH and ammonium polyphosphate in a certain range of composite used in PA6/PP blends, can produce good synergistic flame retardant effect.
Synergistic effects may be due to the LDH release amount of gas of the intumescent flame retardant system required in the heating process, Al Mg composite oxide generated at the same time not only has a large specific surface area, but also has strong alkaline catalysis, and therefore can acid ammonium polyphosphate ammonium polyphosphate full role, promote better catalytic PA6/PP rapid dehydration, crosslinking and charring material, so as to realize the acid source, carbon source and gas source the best match, effectively play the role of condensed phase flame retardant.
Triphenyl Phosphate (TPP)
Flame retardant tpp This product has good transparency , flexibility and good benefits antimicrobial resistance, with water, oil, electrical insulation and compatibility. Mainly for the cellulose resin, a vinyl resin, natural rubber and synthetic rubber flame retardant plasticizers may also be used for acetate and glycerol triacetate film thin , rigid polyurethane foam , phenolic resin, and engineering plastics such as resistance PPO burning plasticized . Flame Retardant tpp manufacturer price mainly in Jiangsu .
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
Wang Guancai et al. Used brucite, Al (OH) 3 and ammonium polyphosphate for flame retarded unsaturated polyester resin (UPR). The results showed that the flame retardant system, brucite, Al (OH) synergistic effects was 3, ammonium polyphosphate in three, brucite /Al (OH) 3/ ammonium polyphosphate as composite flame retardant, 2/1/1 content is 40%, the limit oxygen index of the composite is 33.8%, vertical the combustion of FV-0, smoke density rating of 56.74, able to meet the national B1 level electrical requirements of thermosetting plastics.
Zhang and so on in aqueous solution will ammonium polyphosphate, PER and other inserted into the interlayer of LDH, and then the flame retardant treatment of PP, compared with the traditional mixing method, the new treatment method of flame retardant PP has better light transmittance and mechanical properties. When the dosage is 30%, the limit oxygen index reaches 31%, and the UL94 test reaches V1 level.
Zhao LDH and poly ammonium phosphate used in flame retardant treatment, the PVA study found that the amount of composite flame retardant is 15%, with the content of LDH increased gradually in the range of 0.1%~10%, the limiting oxygen index reached 33% and the level of UL94V0, compared with PP/ poly ammonium phosphate system, the addition of LDH improves the decomposition temperature and mechanical properties of the system.
Zhang of the two valence cation containing different LDH synergistic flame retardant PP/ intumescent flame retardant system, the results show that the LDH can achieve a nanometer size in the system, LDH and synergistic effect of ammonium polyphosphate, so that the limit oxygen index increases, heat release rate, total heat release and production the smoke was obviously decreased, especially with Zn 2+ or Cu2+ LDH to limit oxygen index system reached 33%, V0 by UL94 test. LDH can obviously improve the thermal stability of the flame retardant system and form a more solid carbon layer.
Xie believed that compounds such as acetyl acetone and oligomeric salicylaldehyde some metal complexes of Cu (o), Co (o), Ni (o) complexes can be used not only as a free radical inhibitor, but also catalytic charring, so the low density polyethylene metal complexes used in the expansion system of flame retardant (PE-LD). Can greatly improve the samples when 400~650e char, reduce the flammability of degradation products, effectively improve the flame retardant properties of materials.
Wang the metal complexes used in polyvinyl alcohol (PVA) intumescent flame retardant system, found that when adding 0.5% metal complexes, can significantly improve the flame retardant performance, the thermal degradation of TGA, SEM and FTIR of the polymer and study of char morphology showed that SALICYLALDOXIME with nickel (NiSAO) thermal stability to improve PVA/ intumescent flame retardant system, char containing phosphoric acid or polyphosphoric acid, continuous dense carbon layer can prevent the combustion process of heat transfer, improve the flame retardant performance of materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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