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High density polyethylene flame retardant
2017-11-17 11:48:48
High density polyethylene flame retardant
Expanded graphite (EG) is another kind of inorganic flame retardant which has been widely used. Because of its advantages of rich resources, simple manufacturing, low price, non-toxic and low smoke, intumescent graphite flame retardants have become another hot spot in the research of intumescent flame retardants. However, when EG is used alone, the flame retardant effect is poor, and it is generally used with other flame retardants to achieve better flame retardant effect. Ammonium polyphosphate is one of the most important flame retardants.
High density polyethylene flame retardant is prepared by mixing expanded graphite flame retardant EG with ammonium polyphosphate, which is commonly used for flame retardant of high density polyethylene (PE-HD). It was found that the addition of HDPE flame retardant improved the thermal stability of PE-HD, slowed down the degradation process, and increased the residual carbon rate. The LOI is the best when the HDPE flame retardant is 2/1 or 1/3.
The addition of ammonium polyphosphate /EG can make the PE-HD generate continuous dense carbon layer, while the influence on the mechanical properties of the material is smaller than that of other intumescent flame retardants. Cai Xiaoxia et al. Studied the synergistic flame retardancy of EVA with ammonium polyphosphate /EG.
The results show that ammonium polyphosphate and EG has good flame retardant synergism of EVA in different periods, that heated play is the main reasons of collaboration, is mainly pre type graphite flame retardant EG expansion in the condensed phase flame retardant mechanism, the latter is mainly in ammonium polyphosphate in condensed phase flame retardant effect and part of the play the gas phase flame retardant effect. Wei et al. Used natural graphite, self-made EG and intumescent flame retardant together to flame retardant PP. It was found that the synergistic efficiency of EG and intumescent flame retardant was the highest when adding 2 phr, and the efficiency was higher than that of natural graphite.
Modification of intumescent coatings for ammonium polyphosphate /PER/MEL flame retardant by Li and MoSi2 by EG and others. The results showed that after adding EG and MoSi2, the refractory time of the coating was prolonged obviously, and the residual carbon rate was improved obviously. The flame retardancy is best when adding 9%MoSi2 and 5%EG. After adding EG and MoSi2, the oxidation resistance of the coating was improved, mainly because the ceramic protective layer formed by MoSi2 was covered by the surface of the porous residual carbon.
The synergistic flame retardant effect of EG, ammonium polyphosphate and intumescent flame retardant on PE was studied by Han. The results show that EG and intumescent flame retardant have better synergistic flame retardant efficiency, EG/ ammonium polyphosphate can only slightly delay the degradation of PE, while EG/ intumescent flame retardant can promote the formation of more solid carbon layer, which leads to a significant reduction in weight loss rate and a higher synergistic efficiency.
Triphenyl Phosphate (TPP)
Triphenyl Phosphatetpp-cas: 15-86-6
EINECS number: 204-112-2
Chinese Name: Triphenyl Phosphate
Chinese alias: phosphoric acid three phenyl ester; flame retardant TPP; TPP
English Name: Triphenyl Phosphate
English alias: Triphenyl Phosphate free of phenol; Triphenyl Phosphate (TPPa); Triphenyl Phosphate white XTL Phosphoric acid triphenyl ester; TPP
Molecular formula: C18H15O4P; OP (OC6H5) 3
Appearance and properties: white crystalline powder, odorless, slightly deliquescence
Molecular weight: 326.29
Steam pressure: 0.01kPa/20 ℃
The above is the product of the CAS, such as Triphenyl Phosphate tpp-cas: 15-86-6 other information please contact us!
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.
Ke nano SiO2 for ammonium polyphosphate / dPER / melamine (ammonium polyphosphate /DPER/MEL) with acrylic paint, by limiting oxygen index, TGA, DTA, scanning electron microscopy (SEM) and the XPS research found that nano particles dispersed well in acrylic compound, can improve the generation of carbon layer structure under high temperature, improve its antioxidant properties. Nano SiO2 and nano TiO2 are used to disperse uniformly and form nano oxide with interpenetrating network structure, which can greatly improve the Hygrothermal properties of the coating, and the coating can still retain excellent flame retardant properties and mechanical properties after heat and moisture test.
In addition, Levchik et al. Used a layered structure of aluminosilicate mica and ammonium polyphosphate for flame retardancy of polyamide 6 (PA6). It was found that the addition of mica could increase the LOI of PA6 flame retardant by UL94V0. At the same time, it was found that ammonium polyphosphate would react with mica to produce volatile poly phosphoric acid and increase the content and stability of solid residue when the heat exceeded 350e.
Chen hydroxy silicone oil (HSO) as the synergist of intumescent flame retardant system for flame retardant PP, through the study of TGA cone calorimeter XPS found that the release rate and total heat PP/ ammonium polyphosphate /PER/HSO and PP/ ammonium polyphosphate /MEL/PER/HSO has smaller heat release, CO and CO2 produced significantly reduced, HSO can promote the formation of uniform combustion char layer is solid, have obvious synergistic effect.
Marosi et al. Applied a kind of ceramic precursor organic boron siloxane (BSi) to ammonium polyphosphate (/PER) flame retardant PP system. A small amount of reactive BSi (2%) could increase the limit oxygen index from 29% to 35%, and UL94 increased from V2 to V0. Raman spectroscopy shows that BSi is partly converted into inorganic carbon under combustion conditions, and then inorganic / organic hybrid carbon layer is formed. The carbon layer has good flexibility, stable and non cracking under flame, and has excellent heat insulation and oxygen separation performance.
Kandola and Xia showed that montmorillonite and ammonium polyphosphate had synergistic effect. Montmorillonite could obviously increase carbon generation, reduce the rate of heat release, total heat release and smoke generation. Liu Guosheng will be used for sepiolite intumescent flame retardant processing PP, found that there is a synergistic effect between sepiolite and ammonium polyphosphate, adding 25 phr of flame retardant by UL94V0, adding the same amount of addition of sepiolite system average heat release rate and smoke density is lowest, the highest limit oxygen index, good mechanical properties.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Expanded graphite (EG) is another kind of inorganic flame retardant which has been widely used. Because of its advantages of rich resources, simple manufacturing, low price, non-toxic and low smoke, intumescent graphite flame retardants have become another hot spot in the research of intumescent flame retardants. However, when EG is used alone, the flame retardant effect is poor, and it is generally used with other flame retardants to achieve better flame retardant effect. Ammonium polyphosphate is one of the most important flame retardants.
High density polyethylene flame retardant is prepared by mixing expanded graphite flame retardant EG with ammonium polyphosphate, which is commonly used for flame retardant of high density polyethylene (PE-HD). It was found that the addition of HDPE flame retardant improved the thermal stability of PE-HD, slowed down the degradation process, and increased the residual carbon rate. The LOI is the best when the HDPE flame retardant is 2/1 or 1/3.
The addition of ammonium polyphosphate /EG can make the PE-HD generate continuous dense carbon layer, while the influence on the mechanical properties of the material is smaller than that of other intumescent flame retardants. Cai Xiaoxia et al. Studied the synergistic flame retardancy of EVA with ammonium polyphosphate /EG.
The results show that ammonium polyphosphate and EG has good flame retardant synergism of EVA in different periods, that heated play is the main reasons of collaboration, is mainly pre type graphite flame retardant EG expansion in the condensed phase flame retardant mechanism, the latter is mainly in ammonium polyphosphate in condensed phase flame retardant effect and part of the play the gas phase flame retardant effect. Wei et al. Used natural graphite, self-made EG and intumescent flame retardant together to flame retardant PP. It was found that the synergistic efficiency of EG and intumescent flame retardant was the highest when adding 2 phr, and the efficiency was higher than that of natural graphite.
Modification of intumescent coatings for ammonium polyphosphate /PER/MEL flame retardant by Li and MoSi2 by EG and others. The results showed that after adding EG and MoSi2, the refractory time of the coating was prolonged obviously, and the residual carbon rate was improved obviously. The flame retardancy is best when adding 9%MoSi2 and 5%EG. After adding EG and MoSi2, the oxidation resistance of the coating was improved, mainly because the ceramic protective layer formed by MoSi2 was covered by the surface of the porous residual carbon.
The synergistic flame retardant effect of EG, ammonium polyphosphate and intumescent flame retardant on PE was studied by Han. The results show that EG and intumescent flame retardant have better synergistic flame retardant efficiency, EG/ ammonium polyphosphate can only slightly delay the degradation of PE, while EG/ intumescent flame retardant can promote the formation of more solid carbon layer, which leads to a significant reduction in weight loss rate and a higher synergistic efficiency.
Triphenyl Phosphate (TPP)
Triphenyl Phosphatetpp-cas: 15-86-6
EINECS number: 204-112-2
Chinese Name: Triphenyl Phosphate
Chinese alias: phosphoric acid three phenyl ester; flame retardant TPP; TPP
English Name: Triphenyl Phosphate
English alias: Triphenyl Phosphate free of phenol; Triphenyl Phosphate (TPPa); Triphenyl Phosphate white XTL Phosphoric acid triphenyl ester; TPP
Molecular formula: C18H15O4P; OP (OC6H5) 3
Appearance and properties: white crystalline powder, odorless, slightly deliquescence
Molecular weight: 326.29
Steam pressure: 0.01kPa/20 ℃
The above is the product of the CAS, such as Triphenyl Phosphate tpp-cas: 15-86-6 other information please contact us!
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.
Ke nano SiO2 for ammonium polyphosphate / dPER / melamine (ammonium polyphosphate /DPER/MEL) with acrylic paint, by limiting oxygen index, TGA, DTA, scanning electron microscopy (SEM) and the XPS research found that nano particles dispersed well in acrylic compound, can improve the generation of carbon layer structure under high temperature, improve its antioxidant properties. Nano SiO2 and nano TiO2 are used to disperse uniformly and form nano oxide with interpenetrating network structure, which can greatly improve the Hygrothermal properties of the coating, and the coating can still retain excellent flame retardant properties and mechanical properties after heat and moisture test.
In addition, Levchik et al. Used a layered structure of aluminosilicate mica and ammonium polyphosphate for flame retardancy of polyamide 6 (PA6). It was found that the addition of mica could increase the LOI of PA6 flame retardant by UL94V0. At the same time, it was found that ammonium polyphosphate would react with mica to produce volatile poly phosphoric acid and increase the content and stability of solid residue when the heat exceeded 350e.
Chen hydroxy silicone oil (HSO) as the synergist of intumescent flame retardant system for flame retardant PP, through the study of TGA cone calorimeter XPS found that the release rate and total heat PP/ ammonium polyphosphate /PER/HSO and PP/ ammonium polyphosphate /MEL/PER/HSO has smaller heat release, CO and CO2 produced significantly reduced, HSO can promote the formation of uniform combustion char layer is solid, have obvious synergistic effect.
Marosi et al. Applied a kind of ceramic precursor organic boron siloxane (BSi) to ammonium polyphosphate (/PER) flame retardant PP system. A small amount of reactive BSi (2%) could increase the limit oxygen index from 29% to 35%, and UL94 increased from V2 to V0. Raman spectroscopy shows that BSi is partly converted into inorganic carbon under combustion conditions, and then inorganic / organic hybrid carbon layer is formed. The carbon layer has good flexibility, stable and non cracking under flame, and has excellent heat insulation and oxygen separation performance.
Kandola and Xia showed that montmorillonite and ammonium polyphosphate had synergistic effect. Montmorillonite could obviously increase carbon generation, reduce the rate of heat release, total heat release and smoke generation. Liu Guosheng will be used for sepiolite intumescent flame retardant processing PP, found that there is a synergistic effect between sepiolite and ammonium polyphosphate, adding 25 phr of flame retardant by UL94V0, adding the same amount of addition of sepiolite system average heat release rate and smoke density is lowest, the highest limit oxygen index, good mechanical properties.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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