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Flame retardant of metal oxides for polypropylene (PP)
2017-11-17 11:48:43
Flame retardant of metal oxides for polypropylene (PP)
Some metal oxide flame retardants used in polypropylene (PP) are also synergistic agents which are often used in intumescent flame retardants.
Levchik study found that adding some inorganic fillers such as CaCO3, ZnCO3 and MnO2 in polyphosphate flame PA6 can obviously improve the flame retardant performance, but CaCO3 and ZnCO3 have no effect on the PA6 and the interaction between poly ammonium phosphate, and MnO2 will accelerate the oxidation of PA6, generating more carbon, and MnO2 with the reaction of phosphate ammonium polyphosphate vitreous body, so that the system's char yield increased, and the performance of carbon layer insulation and isolation of combustible gas is improved. The research work of Lewinm confirmed that zinc and manganese compounds have catalytic synergistic effect on ammonium polyphosphate /PER system.
Tian Chunming et al. Studied the flame retardant synergistic effects of metal oxide flame retardants such as ZnO, CdO, MnO2, ZrO2, TiO2 and other polypropylene (PP) in intumescent flame retardant polypropylene (PP) by limiting oxygen index (LOI), TGA and Fourier transform infrared spectroscopy (FTIR). The results show that the synergistic effects between oxide and ammonium polyphosphate /PER intumescent flame retardant system, has obvious catalysis on the esterification reaction and char, but residual product structure on the generated and no effect on metal oxides can promote the generation of more char residue, the formation of stable carbon layer, is the main reason for the increase flame retardant materials.
Po patent also mentioned with metal oxides such as MnO2, MnO, TiO2, ZrO2, CuO, Sb2O3, polypropylene (PP) with metal oxides as flame retardant synergistic agent of ammonium polyphosphate /PER for polystyrene (PS), high impact polystyrene and polybutadiene, physical and mechanical properties of materials will not be too much damage the.
Li La2O3 used as synergistic agent in intumescent flame retardant polypropylene (PP), when the adding amount of the flame retardant is 20%, a very small amount of La2O3 can greatly improve the polypropylene (PP) and the limiting oxygen index of the materials by UL94V0, the flame retardant polypropylene (PP) has a synergistic flame retardant and smoke suppressant.
Wu FTIR and SEM TGA, through a detailed study of the main group metal oxides of Bi2O3, Sb2O3 and SnO2 in polypropylene (PP) / synergistic effect of ammonium polyphosphate /DPER flame retardant system, found a metal oxide can improve the limiting oxygen index system; TGA research shows that Bi2O3 can inhibit the decomposition of ammonium polyphosphate /DPER at high temperature the increase in char yield; TGA and FTIR studies showed that Bi2O3 changed the degradation process of NH3 and phosphorus oxide release, improve the flame retardant efficiency.
Further research found that the transition metal oxides such as MnO2, ZnO and Ni2O3 of polypropylene (PP) / ammonium polyphosphate /DPER flame retardant system has a synergistic effect, because the transition metal ions with nuclear electronic special arrangement (with d orbital) and ionic radius, can produce strong interaction with ammonium polyphosphate and form complexes containing Ni2O3, the polypropylene (PP) / melting of ammonium polyphosphate /DPER system under high temperature and the release of NH3 can be beneficial to the match, to improve the flame retardant performance of materials is the most effective.
Triphenyl Phosphate (TPP)
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.
Liu and other metal oxides for styrene butadiene rubber ammonium polyphosphate flame retardant /PER, it is found that the addition of ZrO2 can make 3.4 copies of the material to achieve the UL94V0 level, ZrO2 can enhance the stability of flame retardant in high temperature, increase the char yield, ZrO2 and ammonium polyphosphate are reacted to ZrP2O7, a more compact structure of carbon containing ZrO2. Flame retardant samples, effectively improve the flame retardant properties of materials. Copper oxide and ammonium polyphosphate were used for flame retardant treatment of PA6.
The results show that copper oxide can reduce the initial decomposition temperature and thermal weight loss rate of PA6, improve the activation energy of thermal decomposition, promote the cleavage of alkyl amide bond, and change the thermal degradation pathway of PA6. The reaction between ammonium polyphosphate and PA6 to produce phosphorus carbon ester material has good thermal stability at high temperature, which is beneficial to the improvement of flame retardant performance.
Chen will be synergistic agent for acid nickel ammonium polyphosphate /PER polypropylene (PP), research shows that the nickel formate limit oxygen index were significantly increased, and the microstructure of polypropylene (PP) system of thermal stability and char changes, the content of catalyst increases in the range of 0.1%~5% the sample, the limiting oxygen index increased gradually; with further increasing the catalyst content, limit oxygen index decreased.
Nie nanoporous nickel phosphate was synthesized by hydrothermal method, the nickel phosphate as synergistic agent for ammonium polyphosphate /PER polypropylene (PP), the study found that adding 2% nickel phosphate and 23% intumescent flame retardant, can make the limit oxygen index increased from 28% to 35.5% in polypropylene (PP) only with intumescent flame retardant 20%, materials can not be tested by UL94, and when the 2% nickel phosphate and 18% intumescent flame retardant synergistic use, materials can reach UL94V0 level. XPS study showed that polypropylene (PP) / flame retardant / nickel phosphate system in the 800e 10min expansion ratio and polypropylene samples of P/C and N/C (PP) / intumescent flame retardant system is evidently improved compared to that from 0.133 and 0.0328 respectively to 0.205 and 0.047 respectively, increased by 54% and 45.4%. With the organic montmorillonite, zeolite 4A and zinc borate compared with better synergistic effect.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Some metal oxide flame retardants used in polypropylene (PP) are also synergistic agents which are often used in intumescent flame retardants.
Levchik study found that adding some inorganic fillers such as CaCO3, ZnCO3 and MnO2 in polyphosphate flame PA6 can obviously improve the flame retardant performance, but CaCO3 and ZnCO3 have no effect on the PA6 and the interaction between poly ammonium phosphate, and MnO2 will accelerate the oxidation of PA6, generating more carbon, and MnO2 with the reaction of phosphate ammonium polyphosphate vitreous body, so that the system's char yield increased, and the performance of carbon layer insulation and isolation of combustible gas is improved. The research work of Lewinm confirmed that zinc and manganese compounds have catalytic synergistic effect on ammonium polyphosphate /PER system.
Tian Chunming et al. Studied the flame retardant synergistic effects of metal oxide flame retardants such as ZnO, CdO, MnO2, ZrO2, TiO2 and other polypropylene (PP) in intumescent flame retardant polypropylene (PP) by limiting oxygen index (LOI), TGA and Fourier transform infrared spectroscopy (FTIR). The results show that the synergistic effects between oxide and ammonium polyphosphate /PER intumescent flame retardant system, has obvious catalysis on the esterification reaction and char, but residual product structure on the generated and no effect on metal oxides can promote the generation of more char residue, the formation of stable carbon layer, is the main reason for the increase flame retardant materials.
Po patent also mentioned with metal oxides such as MnO2, MnO, TiO2, ZrO2, CuO, Sb2O3, polypropylene (PP) with metal oxides as flame retardant synergistic agent of ammonium polyphosphate /PER for polystyrene (PS), high impact polystyrene and polybutadiene, physical and mechanical properties of materials will not be too much damage the.
Li La2O3 used as synergistic agent in intumescent flame retardant polypropylene (PP), when the adding amount of the flame retardant is 20%, a very small amount of La2O3 can greatly improve the polypropylene (PP) and the limiting oxygen index of the materials by UL94V0, the flame retardant polypropylene (PP) has a synergistic flame retardant and smoke suppressant.
Wu FTIR and SEM TGA, through a detailed study of the main group metal oxides of Bi2O3, Sb2O3 and SnO2 in polypropylene (PP) / synergistic effect of ammonium polyphosphate /DPER flame retardant system, found a metal oxide can improve the limiting oxygen index system; TGA research shows that Bi2O3 can inhibit the decomposition of ammonium polyphosphate /DPER at high temperature the increase in char yield; TGA and FTIR studies showed that Bi2O3 changed the degradation process of NH3 and phosphorus oxide release, improve the flame retardant efficiency.
Further research found that the transition metal oxides such as MnO2, ZnO and Ni2O3 of polypropylene (PP) / ammonium polyphosphate /DPER flame retardant system has a synergistic effect, because the transition metal ions with nuclear electronic special arrangement (with d orbital) and ionic radius, can produce strong interaction with ammonium polyphosphate and form complexes containing Ni2O3, the polypropylene (PP) / melting of ammonium polyphosphate /DPER system under high temperature and the release of NH3 can be beneficial to the match, to improve the flame retardant performance of materials is the most effective.
Triphenyl Phosphate (TPP)
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.
Liu and other metal oxides for styrene butadiene rubber ammonium polyphosphate flame retardant /PER, it is found that the addition of ZrO2 can make 3.4 copies of the material to achieve the UL94V0 level, ZrO2 can enhance the stability of flame retardant in high temperature, increase the char yield, ZrO2 and ammonium polyphosphate are reacted to ZrP2O7, a more compact structure of carbon containing ZrO2. Flame retardant samples, effectively improve the flame retardant properties of materials. Copper oxide and ammonium polyphosphate were used for flame retardant treatment of PA6.
The results show that copper oxide can reduce the initial decomposition temperature and thermal weight loss rate of PA6, improve the activation energy of thermal decomposition, promote the cleavage of alkyl amide bond, and change the thermal degradation pathway of PA6. The reaction between ammonium polyphosphate and PA6 to produce phosphorus carbon ester material has good thermal stability at high temperature, which is beneficial to the improvement of flame retardant performance.
Chen will be synergistic agent for acid nickel ammonium polyphosphate /PER polypropylene (PP), research shows that the nickel formate limit oxygen index were significantly increased, and the microstructure of polypropylene (PP) system of thermal stability and char changes, the content of catalyst increases in the range of 0.1%~5% the sample, the limiting oxygen index increased gradually; with further increasing the catalyst content, limit oxygen index decreased.
Nie nanoporous nickel phosphate was synthesized by hydrothermal method, the nickel phosphate as synergistic agent for ammonium polyphosphate /PER polypropylene (PP), the study found that adding 2% nickel phosphate and 23% intumescent flame retardant, can make the limit oxygen index increased from 28% to 35.5% in polypropylene (PP) only with intumescent flame retardant 20%, materials can not be tested by UL94, and when the 2% nickel phosphate and 18% intumescent flame retardant synergistic use, materials can reach UL94V0 level. XPS study showed that polypropylene (PP) / flame retardant / nickel phosphate system in the 800e 10min expansion ratio and polypropylene samples of P/C and N/C (PP) / intumescent flame retardant system is evidently improved compared to that from 0.133 and 0.0328 respectively to 0.205 and 0.047 respectively, increased by 54% and 45.4%. With the organic montmorillonite, zeolite 4A and zinc borate compared with better synergistic effect.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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