News Details
Epoxy resin halogen flame retardant
2017-11-26 22:16:36
Epoxy resin halogen flame retardant
The decomposition of epoxy resin halogen flame retardant produces halogenated hydrogen (HX), hydrogen halide to eliminate the combustion reaction of polymer materials to produce active free radicals.
Such as HX and the chain reaction active substance HO in the flame, the concentration of the free radical is reduced, thus retarding or terminating the chain reaction of combustion and achieving the purpose of flame retardant. RX, HX.HX + HO + X + H2ORH + X + HX + R +
Epoxy resin halogen flame retardant decomposition of HX residues in combustion conditions can promote the dehydration and carbonization of polymer materials, forming a refractory carbonized layer, reducing the amount of low molecular weight pyrolysis products, hindering the normal combustion reaction.
Epoxy resin halogen flame retardant has good flame retardant effect and little amount of additive, which has little influence on the properties of the material. But the amount of smoke is large, the released hydrogen gas is corrosive, and will produce toxic carcinogens, polybrominated benzene, benzene and polybrominated two benzene furan furan, affect the normal metabolism of the human body.
The European Union has implemented the RoHS directive in July 1, 2006 and strictly restricted the use of polybrominated diphenyl ethers (), polybrominated diphenyl ethers (PBDE) and polybrominated diphenyl ethers (PBB). Halogen flame retardants are very effective for unreinforced and reinforced nylon, which can be used in conjunction with synergistic metal oxides, metal salts, phosphorus compounds or charring agents.
But halogenated flame retardants also cause nylon chains to crack into combustible monomers or something similar to that initiated or catalyzed by HX. Flame retardant is commonly used chlorinated flame retardant and desertification flame retardant; chlorinated flame retardant mainly hexachlorocyclopentadiane and octadiene occur Diels Alder reaction generated two yuan addition product, double (hexachlorocyclopentadiane) cyclooctane, it most commonly used in nylon.
Metal oxide synergist flame retardant polyamide composition mainly includes 15%-30% and 4%-15% chloride additive, synergistic agent comprises three oxidation two antimony, ferric oxide, zinc borate and Zinc Oxide, ferric oxide is the most effective in nylon 66. When brominated flame retardants are used alone, the effect is not obvious, but the effect is obvious after the synergistic effect of three oxidation of two antimony.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
The reason why the flame retardant effect of Br-Sb synergistic system on PA is very good is that HBr reacts with Sb2O3 to form SbOBr, and SbOBr releases SbBr3 when heated, and SbBr3 is the main undertaker of flame retardant effect. The relative density is large, which plays a role in eliminating oxygen. (3) condensation of droplets or solid particles over the flame produces a wall effect that scatters a large amount of heat. (4) the dissociation time of SbOBr was prolonged, and the endothermic effect was increased.
Halogen flame retardant has excellent flame retardancy, workability and compatibility, good weatherability, chemical stability and electrical properties of nylon system, thermal stability is high, but the lack of anti UV stability and surface spraying frost on flame retardant and smoke and toxic gases released. Therefore, in the future, the development direction of halogen free flame retardants should be replaced by halogen free flame retardants.
Ten two ten two bromine diphenyl ethane bromine diphenyl ethane, he not only has the advantages of decabromodiphenyl oxide, and thermal stability, light stability, anti migration and other aspects are more important than DecaBDE is a stroke above, it does not exist the ether bond in the molecule, so there is no danger of generation of polybrominated benzene and dioxane two and two two polybrominated dibenzofuran, so in recent years in the global sales prospects, is an important new type of brominated flame retardants.
Because of the high melting point and insoluble in the resin, the ten bromine two phenyl ethane has a higher thermal deformation temperature, and the disadvantage is lower melt flow index and lower impact strength. In order to overcome these two shortcomings, people have developed ten bromine two phenyl ethane modified varieties, they can give flame retardant material better processing performance.
Another method to improve the impact strength of ten bromine two phenyl ethane flame retardant polymer material is to use impact strength modifier, the most effective impact strength modifier is SBS and chlorinated polyethylene, the two mixed use effect is better, can give full play to the impact strength modifier role.
The brominated phosphate, and melamine based flame retardant in plastics and wood / paper used in growth momentum, the rapid growth of consumption. At present, melamine based flame retardant market share is very small, only more than 1%, but the expected consumption growth will be higher than the overall average level of flame retardant, mainly used for plastics and coatings industry.
And its consumption in Europe is growing faster, because some brominated flame retardants are banned and restricted in europe. At the same time, the United States and other countries flame retardant standards, will continue to stimulate the growth of flame retardant consumption. In addition, the environmental and health effects of halogenated flame retardants have accelerated their pace of substitution, especially in the European market for the prohibition of directives.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The decomposition of epoxy resin halogen flame retardant produces halogenated hydrogen (HX), hydrogen halide to eliminate the combustion reaction of polymer materials to produce active free radicals.
Such as HX and the chain reaction active substance HO in the flame, the concentration of the free radical is reduced, thus retarding or terminating the chain reaction of combustion and achieving the purpose of flame retardant. RX, HX.HX + HO + X + H2ORH + X + HX + R +
Epoxy resin halogen flame retardant decomposition of HX residues in combustion conditions can promote the dehydration and carbonization of polymer materials, forming a refractory carbonized layer, reducing the amount of low molecular weight pyrolysis products, hindering the normal combustion reaction.
Epoxy resin halogen flame retardant has good flame retardant effect and little amount of additive, which has little influence on the properties of the material. But the amount of smoke is large, the released hydrogen gas is corrosive, and will produce toxic carcinogens, polybrominated benzene, benzene and polybrominated two benzene furan furan, affect the normal metabolism of the human body.
The European Union has implemented the RoHS directive in July 1, 2006 and strictly restricted the use of polybrominated diphenyl ethers (), polybrominated diphenyl ethers (PBDE) and polybrominated diphenyl ethers (PBB). Halogen flame retardants are very effective for unreinforced and reinforced nylon, which can be used in conjunction with synergistic metal oxides, metal salts, phosphorus compounds or charring agents.
But halogenated flame retardants also cause nylon chains to crack into combustible monomers or something similar to that initiated or catalyzed by HX. Flame retardant is commonly used chlorinated flame retardant and desertification flame retardant; chlorinated flame retardant mainly hexachlorocyclopentadiane and octadiene occur Diels Alder reaction generated two yuan addition product, double (hexachlorocyclopentadiane) cyclooctane, it most commonly used in nylon.
Metal oxide synergist flame retardant polyamide composition mainly includes 15%-30% and 4%-15% chloride additive, synergistic agent comprises three oxidation two antimony, ferric oxide, zinc borate and Zinc Oxide, ferric oxide is the most effective in nylon 66. When brominated flame retardants are used alone, the effect is not obvious, but the effect is obvious after the synergistic effect of three oxidation of two antimony.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
The reason why the flame retardant effect of Br-Sb synergistic system on PA is very good is that HBr reacts with Sb2O3 to form SbOBr, and SbOBr releases SbBr3 when heated, and SbBr3 is the main undertaker of flame retardant effect. The relative density is large, which plays a role in eliminating oxygen. (3) condensation of droplets or solid particles over the flame produces a wall effect that scatters a large amount of heat. (4) the dissociation time of SbOBr was prolonged, and the endothermic effect was increased.
Halogen flame retardant has excellent flame retardancy, workability and compatibility, good weatherability, chemical stability and electrical properties of nylon system, thermal stability is high, but the lack of anti UV stability and surface spraying frost on flame retardant and smoke and toxic gases released. Therefore, in the future, the development direction of halogen free flame retardants should be replaced by halogen free flame retardants.
Ten two ten two bromine diphenyl ethane bromine diphenyl ethane, he not only has the advantages of decabromodiphenyl oxide, and thermal stability, light stability, anti migration and other aspects are more important than DecaBDE is a stroke above, it does not exist the ether bond in the molecule, so there is no danger of generation of polybrominated benzene and dioxane two and two two polybrominated dibenzofuran, so in recent years in the global sales prospects, is an important new type of brominated flame retardants.
Because of the high melting point and insoluble in the resin, the ten bromine two phenyl ethane has a higher thermal deformation temperature, and the disadvantage is lower melt flow index and lower impact strength. In order to overcome these two shortcomings, people have developed ten bromine two phenyl ethane modified varieties, they can give flame retardant material better processing performance.
Another method to improve the impact strength of ten bromine two phenyl ethane flame retardant polymer material is to use impact strength modifier, the most effective impact strength modifier is SBS and chlorinated polyethylene, the two mixed use effect is better, can give full play to the impact strength modifier role.
The brominated phosphate, and melamine based flame retardant in plastics and wood / paper used in growth momentum, the rapid growth of consumption. At present, melamine based flame retardant market share is very small, only more than 1%, but the expected consumption growth will be higher than the overall average level of flame retardant, mainly used for plastics and coatings industry.
And its consumption in Europe is growing faster, because some brominated flame retardants are banned and restricted in europe. At the same time, the United States and other countries flame retardant standards, will continue to stimulate the growth of flame retardant consumption. In addition, the environmental and health effects of halogenated flame retardants have accelerated their pace of substitution, especially in the European market for the prohibition of directives.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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