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The classification of the flame retardant
2017-10-25 12:00:35
The classification of the flame retardant
Flame retardant classification method are many, generally by the flame retardant element type divided into two categories: inorganic flame retardants and organic flame retardant.
Inorganic flame retardants mainly for adding type, usually for thermoplastic polymers, including antimony flame retardants, aluminum hydroxide (also known as aluminium trihydrate, ATH) and magnesium hydroxide flame retardant, inorganic flame retardant containing phosphorus, boron and molybdenum flame retardant and smoke suppression agents.
They have good thermal stability, low toxic and non-toxic, does not produce corrosive gas, non-volatile storage process, not precipitation, flame retardant effect lasting advantages, and abundant raw material sources, low price. It is important to note that due to their larger amount of filler in the polymer, and the influence of its inherent characteristics, will lower polymer processing formability and mechanical properties, electrical properties, etc.
The classification of organic fire retardant agent its USES can be divided into two categories, department of organophosphorus and phosphorus-containing flame retardants; Classification according to the role of flame retardant methods can be divided into two categories, reactive and add.
Reactive flame retardant agent in the process of polymerization and polycondensation reaction, thereby combining to the main chain or side chain of polymer, so its function stability, durability, small effects on the performance of the polymer; While adding flame retardant agent is only scattered in flame retardant system, use more convenient.
Organic phosphorus flame retardants for liquid, both increase plasticity and lubricity, and polymer processing AIDS, mainly including halogen containing phosphate ester, containing halogen phosphite ester, phosphate, non - halogen and non halogen phosphite ester, etc. Phosphate ester generally used as flame retardants and plasticizers, phosphite ester commonly used as flame retardants and heat stabilizer.
Polymer containing more than 5% of the phosphorus can have a significant effect of flame retardant. When the flame retardant mechanism is: the heat decomposition generated with strong dehydration nature metaphosphate, partial polyphosphoric acid, make the polymer surface carbide layer, cut off its surface direct contact with air, that the flame is extinguished, so as to achieve the purpose of the flame retardant.
Chlorine system is the most commonly used in flame retardant chlorinated paraffin, chlorinated polyethylene, etc., the former is cheap, and as plasticizer effect, at home and abroad, the dosage is very large. Other main varieties are: four chlorine bisphenol A, tetrachlorophthalic anhydride (requirement), hexachlorobenzene (HCB), epoxy chloropropane, polyvinylidene chloride (PVDC), chlorinated polyvinyl chloride (PVC), etc.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
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.
Bromine flame retardants are adding quantity is little, little effect on the capabilities of the flame retardant products, good compatibility, thermal stability and flame retardant effect etc., is the most important class of organic flame retardant flame retardant. Abroad more than 100 varieties, its production accounted for about 15% ~ 20% of organic fire retardant agent; Development in our country is faster, more than 20 varieties.
Bromine series and chlorine of the flame retardant mechanism of flame retardants for: under the high temperature decomposition to produce hydrogen halide (HX), its density is greater than the air, and deposition in the combustion of the outer, diluted or cut off from the fresh air, cause the burning objects without oxygen suffocation; HX very quickly capture burning HO · free radicals (HX + OH - h. + H2O), slow down the combustion rate of the polymer, reduce the formation of combustible gas, so that the flame is reduced or even extinguished.
In addition, when the phosphorus-containing flame retardants used with Sb2O3, can produce synergies, the generated three antimony halide (SbX3) will sublimate is very fine particles, they are surrounded by mist around polymer, block into the fresh air, quickly put out the flames of fire. Is the development direction of bromine series flame retardant, increased bromine content and molecular weight.
It is important to note that due to the complicated process of combustion and flame retardant, flame retardant in polymer system, is moving toward spell with inorganic and organic flame retardant, the direction of a variety of flame retardant synergistic action, so the actual is often several kinds of flame retardant mechanism of flame retardant system work at the same time.
To type Ⅱ APP, the PEL and MEL IFR; And 4 a zeolite and water-borne polyacrylate (PA) as a binder for flame retardant polyester fabric finishing, flame retardant effect is good. Feel is good, the combustion process of low smoke, bromine flame retardants is obviously better than the color difference, poor water resistance and bromine flame retardants. Abroad for plastic phosphorus - nitrogen with Exolitap department, department of IFR, Budit department, Spinltam MF series expansion type flame retardant, etc.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Flame retardant classification method are many, generally by the flame retardant element type divided into two categories: inorganic flame retardants and organic flame retardant.
Inorganic flame retardants mainly for adding type, usually for thermoplastic polymers, including antimony flame retardants, aluminum hydroxide (also known as aluminium trihydrate, ATH) and magnesium hydroxide flame retardant, inorganic flame retardant containing phosphorus, boron and molybdenum flame retardant and smoke suppression agents.
They have good thermal stability, low toxic and non-toxic, does not produce corrosive gas, non-volatile storage process, not precipitation, flame retardant effect lasting advantages, and abundant raw material sources, low price. It is important to note that due to their larger amount of filler in the polymer, and the influence of its inherent characteristics, will lower polymer processing formability and mechanical properties, electrical properties, etc.
The classification of organic fire retardant agent its USES can be divided into two categories, department of organophosphorus and phosphorus-containing flame retardants; Classification according to the role of flame retardant methods can be divided into two categories, reactive and add.
Reactive flame retardant agent in the process of polymerization and polycondensation reaction, thereby combining to the main chain or side chain of polymer, so its function stability, durability, small effects on the performance of the polymer; While adding flame retardant agent is only scattered in flame retardant system, use more convenient.
Organic phosphorus flame retardants for liquid, both increase plasticity and lubricity, and polymer processing AIDS, mainly including halogen containing phosphate ester, containing halogen phosphite ester, phosphate, non - halogen and non halogen phosphite ester, etc. Phosphate ester generally used as flame retardants and plasticizers, phosphite ester commonly used as flame retardants and heat stabilizer.
Polymer containing more than 5% of the phosphorus can have a significant effect of flame retardant. When the flame retardant mechanism is: the heat decomposition generated with strong dehydration nature metaphosphate, partial polyphosphoric acid, make the polymer surface carbide layer, cut off its surface direct contact with air, that the flame is extinguished, so as to achieve the purpose of the flame retardant.
Chlorine system is the most commonly used in flame retardant chlorinated paraffin, chlorinated polyethylene, etc., the former is cheap, and as plasticizer effect, at home and abroad, the dosage is very large. Other main varieties are: four chlorine bisphenol A, tetrachlorophthalic anhydride (requirement), hexachlorobenzene (HCB), epoxy chloropropane, polyvinylidene chloride (PVDC), chlorinated polyvinyl chloride (PVC), etc.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
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.
Bromine flame retardants are adding quantity is little, little effect on the capabilities of the flame retardant products, good compatibility, thermal stability and flame retardant effect etc., is the most important class of organic flame retardant flame retardant. Abroad more than 100 varieties, its production accounted for about 15% ~ 20% of organic fire retardant agent; Development in our country is faster, more than 20 varieties.
Bromine series and chlorine of the flame retardant mechanism of flame retardants for: under the high temperature decomposition to produce hydrogen halide (HX), its density is greater than the air, and deposition in the combustion of the outer, diluted or cut off from the fresh air, cause the burning objects without oxygen suffocation; HX very quickly capture burning HO · free radicals (HX + OH - h. + H2O), slow down the combustion rate of the polymer, reduce the formation of combustible gas, so that the flame is reduced or even extinguished.
In addition, when the phosphorus-containing flame retardants used with Sb2O3, can produce synergies, the generated three antimony halide (SbX3) will sublimate is very fine particles, they are surrounded by mist around polymer, block into the fresh air, quickly put out the flames of fire. Is the development direction of bromine series flame retardant, increased bromine content and molecular weight.
It is important to note that due to the complicated process of combustion and flame retardant, flame retardant in polymer system, is moving toward spell with inorganic and organic flame retardant, the direction of a variety of flame retardant synergistic action, so the actual is often several kinds of flame retardant mechanism of flame retardant system work at the same time.
To type Ⅱ APP, the PEL and MEL IFR; And 4 a zeolite and water-borne polyacrylate (PA) as a binder for flame retardant polyester fabric finishing, flame retardant effect is good. Feel is good, the combustion process of low smoke, bromine flame retardants is obviously better than the color difference, poor water resistance and bromine flame retardants. Abroad for plastic phosphorus - nitrogen with Exolitap department, department of IFR, Budit department, Spinltam MF series expansion type flame retardant, etc.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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