News Details
Effect of polyurethane flame retardant
2017-11-8 10:52:11
Effect of polyurethane flame retardant
Most polymers, whether natural or synthetic, will burn when exposed to fire. Flame retardants are additives that can prevent the material from being ignited or to inhibit flame propagation. Flame retardant polyurethane is flame retardant synthetic polymer materials or natural polymer materials. In polymer materials processing into flame retardant, can reduce the flammability of polymer materials, polymer materials can make contact with the flame, burning fast slow, self extinguishing after leaving the fire more quickly. Note that materials containing flame retardants are not nonflammable materials. They can only reduce fire risks, but not eliminate fire hazards.
There are many requirements for flame retardants. People hope that the flame retardants with flame retardant effect lasting in the case of a very low amount of hope; flame retardant non-toxic, does not produce toxic gases and smoke when burning; hope flame retardant has high thermal stability, does not decompose or evaporate in case of fire case; to mechanical and physical properties will not due to the use of basic resin flame retardant and loss or reduced.
We should find the best performance / price ratio between flame retardant properties and other properties of the material (effect ratio /cost), but not too much to reduce the material cost of the good performance of the original, blindly to meet the high requirement of flame retardant performance. In addition, in addition to improving the flame retardancy of the material, the effect of polyurethane flame retardant should be reduced as much as possible by the thermal decomposition of materials or the toxic gas generated by combustion. In the field of flame retardants, flame retardant and smoke suppression are complementary.
The flame retardants are mainly phosphorus, halogen, boron, antimony, lead, molybdenum and other organic compounds inorganic substances. According to its usage, flame retardants are generally divided into two types: additive type and reactive type. Additive flame retardant is simply involved and mixed in plastics during the processing of plastics, and the addition of polyurethane flame retardant acts on thermoplastic plastics. Reactive flame retardants are synthesized in the process of polymer synthesis as a component of the reaction, and bonded to the polymer molecular chain, and more used for thermosetting resins. Some reactive flame retardants can also be added in the processing of plastics.
According to the chemical structure, flame retardant can be divided into inorganic flame retardant and organic flame retardant two categories. The inorganic flame retardants including aluminum, antimony, zinc, molybdenum oxide, borate, phosphate, sulfate; organic flame retardants including halogenated aliphatic hydrocarbons and aromatic hydrocarbons, organic phosphorus compounds, halogenated organic phosphorus compounds. According to the main elements of flame retardant flame retardant effect can also be divided into the halogen flame retardant, flame retardant, aluminum, antimony, boron, molybdenum and other metal oxide flame retardant; can also be divided into categories according to the phosphorus, chlorine, bromine and aluminum, boron and antimony based flame retardants.
Flame retardant chemical reaction agent and resin, between flame retardant and resin bond, so the reactive flame retardant in the resin is relatively stable, its inhibitory effect on the flame is usually higher than the additive type durable, has little effect on the properties of the material, but the process is complex and operation. The additive flame retardant is only a mixture of resin and physical, no chemical reaction, large amount of use, more convenient operation, so it has become a widely used flame retardant system.
Tris(2-chloroisopropyl)Phosphate(TCPP)
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.
Due to the transport process to avoid collision damage, Tris2-chloropropyl phosphate TCPP packaging methods generally used 250KG galvanized iron drum.
Below to introduce some of Tris2-chloropropyl phosphate TCPP packaging:
Net weight 250KG/ galvanized iron drum (a small cabinet pallet loaded 20 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Company 1.5 hour drive from Shanghai, the general sent to Shanghai port, the goods from customs inspection to the fastest one week after, the slowest ten days.
In view of the domestic and foreign demand is relatively small clients, also can use 50KG plastic bucket.
If you have special requirements on the Tris2-chloropropyl phosphate TCPP packaging, please contact us, try to meet the packaging requirements of customers.
Combustion of flame retardants is a very complex process of rapid oxidation, from endothermic decomposition of materials to intense oxidation luminescence heat, including a series of physical changes and chemical changes. When the polymer is heated by the external heat source, it is first heated and then degraded to form volatile combustible gas and other thermal decomposition products.
When the concentration of flammable gas increases, the polymer begins to burn when a certain limit is reached. This combustion mode, the polymer under the action of a heat source, first decomposition to produce combustible gas, the combustible gas from the solid diffusion into the gas phase, gas phase reaction of combustible gas and oxygen burning, burning heat to the polymer surface's radiation and transmitted to the polymer, polymer due to thermal effects continue to decompose the formation of cyclic combustion process. Therefore, flame retardant is the inhibition of the combustion cycle.
The products of thermal decomposition of different polymers determine the degree of difficulty in combustion of polymers. Therefore, different polymers have different combustion properties. Due to the addition of different additives, the degree of difficulty in combustion of the same polymer is also changed. When the plasticizer is added into the PVC, the product tends to burn easily, and the addition of the flame retardant makes the product difficult to burn. The purpose of flame retardant is to improve the degree of combustion of products, reduce the possibility of fire, and make products into non combustible materials.
Although the polymer flame retardant can reduce the risk of fire, it can not completely eliminate the fire risk. The flame retardant polymer still burns violently in the fire.
The thermal decomposition characteristics of polymers determine the combustion properties of polymers. After absorbing enough energy, the polymer begins to decompose to produce combustible gases, nonflammable gases and carbonized residues with small molecular weight. Because of their different composition and chemical structure, different polymers have different thermal decomposition properties, namely different thermal decomposition temperature and different decomposition products.
The thermal decomposition temperature is high, which indicates that the thermal stability of the polymer is good, and more heat is needed to decompose it. The decomposition products of polymers determine the degree of difficulty in ignition of polymers. The more combustible gases in the decomposition products, the more likely they are to burn.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Most polymers, whether natural or synthetic, will burn when exposed to fire. Flame retardants are additives that can prevent the material from being ignited or to inhibit flame propagation. Flame retardant polyurethane is flame retardant synthetic polymer materials or natural polymer materials. In polymer materials processing into flame retardant, can reduce the flammability of polymer materials, polymer materials can make contact with the flame, burning fast slow, self extinguishing after leaving the fire more quickly. Note that materials containing flame retardants are not nonflammable materials. They can only reduce fire risks, but not eliminate fire hazards.
There are many requirements for flame retardants. People hope that the flame retardants with flame retardant effect lasting in the case of a very low amount of hope; flame retardant non-toxic, does not produce toxic gases and smoke when burning; hope flame retardant has high thermal stability, does not decompose or evaporate in case of fire case; to mechanical and physical properties will not due to the use of basic resin flame retardant and loss or reduced.
We should find the best performance / price ratio between flame retardant properties and other properties of the material (effect ratio /cost), but not too much to reduce the material cost of the good performance of the original, blindly to meet the high requirement of flame retardant performance. In addition, in addition to improving the flame retardancy of the material, the effect of polyurethane flame retardant should be reduced as much as possible by the thermal decomposition of materials or the toxic gas generated by combustion. In the field of flame retardants, flame retardant and smoke suppression are complementary.
The flame retardants are mainly phosphorus, halogen, boron, antimony, lead, molybdenum and other organic compounds inorganic substances. According to its usage, flame retardants are generally divided into two types: additive type and reactive type. Additive flame retardant is simply involved and mixed in plastics during the processing of plastics, and the addition of polyurethane flame retardant acts on thermoplastic plastics. Reactive flame retardants are synthesized in the process of polymer synthesis as a component of the reaction, and bonded to the polymer molecular chain, and more used for thermosetting resins. Some reactive flame retardants can also be added in the processing of plastics.
According to the chemical structure, flame retardant can be divided into inorganic flame retardant and organic flame retardant two categories. The inorganic flame retardants including aluminum, antimony, zinc, molybdenum oxide, borate, phosphate, sulfate; organic flame retardants including halogenated aliphatic hydrocarbons and aromatic hydrocarbons, organic phosphorus compounds, halogenated organic phosphorus compounds. According to the main elements of flame retardant flame retardant effect can also be divided into the halogen flame retardant, flame retardant, aluminum, antimony, boron, molybdenum and other metal oxide flame retardant; can also be divided into categories according to the phosphorus, chlorine, bromine and aluminum, boron and antimony based flame retardants.
Flame retardant chemical reaction agent and resin, between flame retardant and resin bond, so the reactive flame retardant in the resin is relatively stable, its inhibitory effect on the flame is usually higher than the additive type durable, has little effect on the properties of the material, but the process is complex and operation. The additive flame retardant is only a mixture of resin and physical, no chemical reaction, large amount of use, more convenient operation, so it has become a widely used flame retardant system.
Tris(2-chloroisopropyl)Phosphate(TCPP)
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.
Due to the transport process to avoid collision damage, Tris2-chloropropyl phosphate TCPP packaging methods generally used 250KG galvanized iron drum.
Below to introduce some of Tris2-chloropropyl phosphate TCPP packaging:
Net weight 250KG/ galvanized iron drum (a small cabinet pallet loaded 20 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Company 1.5 hour drive from Shanghai, the general sent to Shanghai port, the goods from customs inspection to the fastest one week after, the slowest ten days.
In view of the domestic and foreign demand is relatively small clients, also can use 50KG plastic bucket.
If you have special requirements on the Tris2-chloropropyl phosphate TCPP packaging, please contact us, try to meet the packaging requirements of customers.
Combustion of flame retardants is a very complex process of rapid oxidation, from endothermic decomposition of materials to intense oxidation luminescence heat, including a series of physical changes and chemical changes. When the polymer is heated by the external heat source, it is first heated and then degraded to form volatile combustible gas and other thermal decomposition products.
When the concentration of flammable gas increases, the polymer begins to burn when a certain limit is reached. This combustion mode, the polymer under the action of a heat source, first decomposition to produce combustible gas, the combustible gas from the solid diffusion into the gas phase, gas phase reaction of combustible gas and oxygen burning, burning heat to the polymer surface's radiation and transmitted to the polymer, polymer due to thermal effects continue to decompose the formation of cyclic combustion process. Therefore, flame retardant is the inhibition of the combustion cycle.
The products of thermal decomposition of different polymers determine the degree of difficulty in combustion of polymers. Therefore, different polymers have different combustion properties. Due to the addition of different additives, the degree of difficulty in combustion of the same polymer is also changed. When the plasticizer is added into the PVC, the product tends to burn easily, and the addition of the flame retardant makes the product difficult to burn. The purpose of flame retardant is to improve the degree of combustion of products, reduce the possibility of fire, and make products into non combustible materials.
Although the polymer flame retardant can reduce the risk of fire, it can not completely eliminate the fire risk. The flame retardant polymer still burns violently in the fire.
The thermal decomposition characteristics of polymers determine the combustion properties of polymers. After absorbing enough energy, the polymer begins to decompose to produce combustible gases, nonflammable gases and carbonized residues with small molecular weight. Because of their different composition and chemical structure, different polymers have different thermal decomposition properties, namely different thermal decomposition temperature and different decomposition products.
The thermal decomposition temperature is high, which indicates that the thermal stability of the polymer is good, and more heat is needed to decompose it. The decomposition products of polymers determine the degree of difficulty in ignition of polymers. The more combustible gases in the decomposition products, the more likely they are to burn.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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