News Details
Flame retardant of polyurethane foam
2017-11-20 11:39:22
Flame retardant of polyurethane foam
Polyurethane foam flame retardant should be activated when the temperature is slightly lower than the decomposition temperature of polymer. In this way, the flame retardant can promote coking, in order to reduce the amount of combustible gas generated by the polymer, or the flame retardant of polyurethane foam can be mixed with potential combustible steam to prevent people or burning.
When halogen containing flame retardants are used in plastics alone, their flame retardancy is very limited, but if antimony compounds are added, their flame retardancy can be greatly increased. Moreover, when the flame retardant effect is the same, the amount of halide can be less. There are several commercially available antimony compounds, among which the most commonly used three antimony oxide is two.
Colloidal five oxidation of two antimony is especially suitable for fiber industry. Because it doesn't have any bad effect on fiber, or it doesn't interfere with spinning. Sodium aluminate is the best antimony synergist for linear polyester. The mixed metal antimony compound, like antimony oxide, has better synergistic effect, but its price is low.
Flame retardant chemicals can be divided into two types: one is additive type, and the other is reactive type. The additive flame retardant can be dispersed in the plastic matrix, but no bond reaction occurs with the polymer primary key.
The reactive additive acts as a comonomer, and becomes a component of the main resin by polymerization.
Additive flame retardant (ATH) release alumina trihydrate moisture in the fire, the flame front area cooling. The thermal stability of ATH is limited. To achieve the required flame retardant requirements, it must be used in large quantities. But because of its low price, it is one of the largest single component flame retardants in the United states.
ATH does not produce smoke, non-toxic, therefore, can be used for unsaturated polyester, epoxy resin, polyurethane, and some wires, cables. Halogen containing compounds are much higher than ATH, but the flame retardant effect is good when the dosage is small. Therefore, it is cost-effective to use this kind of flame retardant.
Polybrominated diphenyl ether type two (eight bromo phenyl ether decabromodiphenyl ether, two) is the most widely used flame retardant containing halogen compounds in polyurethane foam. These additives are cost-effective in terms of cost, and are suitable for high impact polystyrene (HIPS), ABS and other types of styrene.
They are also used in varying degrees for polyesters, polyamides and polyolefins. However, due to their strong UV stability, surface frost, and has a certain effect on the plastic properties (such as low impact strength), so in these types of plastics are not widely used.
Phthalic acid ester two bromide, either liquid or solid, are heat stable flame retardant nonblooming, it can provide ideal flame retardant effect, and on many different kinds of resin can improve the physical properties, is a flame retardant polyurethane foam.
Triphenyl Phosphate (TPP)
The product output : 100 tons / month
Shipping Port: China Shanghai
Price offer is valid : 15 days
Export rights: the right to import and export company .
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.
Some halogen containing aromatic additives are polymers (e.g. brominated polystyrene, brominated polycarbonate). They do not bloom. But because of the high price of these additives, they are generally used only in high-performance engineering plastics. Chlorinated aliphatic hydrocarbons and brominated aliphatic hydrocarbons are used in a variety of plastics, including PE, PVC, polyurethane foam and PP.
However, they are not widely used because of their low thermal stability and plasticization. The product and hexachlorocyclopentadiane octadiene plus is a relatively stable and plasticizing varieties, can also be used for styrene plastic and nylon.
Additives containing phosphorus compounds. Phosphate additives are traditional flame retardants for soft PVC and modified polyphenylene oxide; alkyl phosphates and halogenated phosphates are effectively used in soft polyurethanes, polyesters, epoxy, and other special plastics.
Polyphosphate and its derivatives can be used in a variety of polymers, including polyolefins, elastomers, epoxy and polyurethane. Coated red phosphorus is also used as a flame retardant polyamide, the use of more than in the United States in europe.
Reactive flame retardants, such as vinyl chloride anhydride, four bromo benzene two formic acid and glycol derivative, can replace some nucleic acid or glycol reactants, and play the role of flame retardant in unsaturated polyester and polyurethane foam.
The four bromo bisphenol A derivative and the new bromo diol also have the same flame retardant effect as the bisphenol A monomer in epoxy resin replaced by brominated bisphenol A. Similarly, brominated polycarbonate can be added to the addition of brominated poly (two) in poly (phenylene glycol) (PBT). Reactive flame retardants for hard polyurethanes, including halogen containing, phosphorus containing, and / or nitrogen-containing polyols. They can sometimes be used in combination with additive flame retardants and synergist.
Flame retardant plastics must meet the requirements of the government and meet the requirements of the flame retardant test stipulated in the plastics industry. Recent activities have focused on a wide range of fire topics, including fire retardancy, smoke toxicity, shelter, time to escape from fire, and flame spread rate.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polyurethane foam flame retardant should be activated when the temperature is slightly lower than the decomposition temperature of polymer. In this way, the flame retardant can promote coking, in order to reduce the amount of combustible gas generated by the polymer, or the flame retardant of polyurethane foam can be mixed with potential combustible steam to prevent people or burning.
When halogen containing flame retardants are used in plastics alone, their flame retardancy is very limited, but if antimony compounds are added, their flame retardancy can be greatly increased. Moreover, when the flame retardant effect is the same, the amount of halide can be less. There are several commercially available antimony compounds, among which the most commonly used three antimony oxide is two.
Colloidal five oxidation of two antimony is especially suitable for fiber industry. Because it doesn't have any bad effect on fiber, or it doesn't interfere with spinning. Sodium aluminate is the best antimony synergist for linear polyester. The mixed metal antimony compound, like antimony oxide, has better synergistic effect, but its price is low.
Flame retardant chemicals can be divided into two types: one is additive type, and the other is reactive type. The additive flame retardant can be dispersed in the plastic matrix, but no bond reaction occurs with the polymer primary key.
The reactive additive acts as a comonomer, and becomes a component of the main resin by polymerization.
Additive flame retardant (ATH) release alumina trihydrate moisture in the fire, the flame front area cooling. The thermal stability of ATH is limited. To achieve the required flame retardant requirements, it must be used in large quantities. But because of its low price, it is one of the largest single component flame retardants in the United states.
ATH does not produce smoke, non-toxic, therefore, can be used for unsaturated polyester, epoxy resin, polyurethane, and some wires, cables. Halogen containing compounds are much higher than ATH, but the flame retardant effect is good when the dosage is small. Therefore, it is cost-effective to use this kind of flame retardant.
Polybrominated diphenyl ether type two (eight bromo phenyl ether decabromodiphenyl ether, two) is the most widely used flame retardant containing halogen compounds in polyurethane foam. These additives are cost-effective in terms of cost, and are suitable for high impact polystyrene (HIPS), ABS and other types of styrene.
They are also used in varying degrees for polyesters, polyamides and polyolefins. However, due to their strong UV stability, surface frost, and has a certain effect on the plastic properties (such as low impact strength), so in these types of plastics are not widely used.
Phthalic acid ester two bromide, either liquid or solid, are heat stable flame retardant nonblooming, it can provide ideal flame retardant effect, and on many different kinds of resin can improve the physical properties, is a flame retardant polyurethane foam.
Triphenyl Phosphate (TPP)
The product output : 100 tons / month
Shipping Port: China Shanghai
Price offer is valid : 15 days
Export rights: the right to import and export company .
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.
Some halogen containing aromatic additives are polymers (e.g. brominated polystyrene, brominated polycarbonate). They do not bloom. But because of the high price of these additives, they are generally used only in high-performance engineering plastics. Chlorinated aliphatic hydrocarbons and brominated aliphatic hydrocarbons are used in a variety of plastics, including PE, PVC, polyurethane foam and PP.
However, they are not widely used because of their low thermal stability and plasticization. The product and hexachlorocyclopentadiane octadiene plus is a relatively stable and plasticizing varieties, can also be used for styrene plastic and nylon.
Additives containing phosphorus compounds. Phosphate additives are traditional flame retardants for soft PVC and modified polyphenylene oxide; alkyl phosphates and halogenated phosphates are effectively used in soft polyurethanes, polyesters, epoxy, and other special plastics.
Polyphosphate and its derivatives can be used in a variety of polymers, including polyolefins, elastomers, epoxy and polyurethane. Coated red phosphorus is also used as a flame retardant polyamide, the use of more than in the United States in europe.
Reactive flame retardants, such as vinyl chloride anhydride, four bromo benzene two formic acid and glycol derivative, can replace some nucleic acid or glycol reactants, and play the role of flame retardant in unsaturated polyester and polyurethane foam.
The four bromo bisphenol A derivative and the new bromo diol also have the same flame retardant effect as the bisphenol A monomer in epoxy resin replaced by brominated bisphenol A. Similarly, brominated polycarbonate can be added to the addition of brominated poly (two) in poly (phenylene glycol) (PBT). Reactive flame retardants for hard polyurethanes, including halogen containing, phosphorus containing, and / or nitrogen-containing polyols. They can sometimes be used in combination with additive flame retardants and synergist.
Flame retardant plastics must meet the requirements of the government and meet the requirements of the flame retardant test stipulated in the plastics industry. Recent activities have focused on a wide range of fire topics, including fire retardancy, smoke toxicity, shelter, time to escape from fire, and flame spread rate.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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