News Details
Organic flame retardants of PC / ABS blends
2017-12-5 10:52:24
Organic flame retardants of PC / ABS blends
Because ordinary intumescent flame retardants are easy to absorb moisture, have large amounts of additives and poor compatibility with plastics, they need to be modified to improve their compatibility with plastics or share them with synergistic substances, so as to improve their flame retardancy.
Of all kinds of flame retardants, the organic flame retardant of PC / ABS blends occupies an important position. The research on organophosphorus flame retardants started in the early part of this century. PC / ABS blends, organic flame retardants, mostly have the advantages of low smoke, non-toxic, low halogen, halogen free, etc., which conform to the development direction of flame retardants, and have good prospects for development.
PC / ABS blends of organic flame retardants including phosphate, phosphite, phosphonate, organic phosphorus and phosphorus and phosphorus, heterocyclic compounds and polymer phosphorus (phosphine) ester, but is the most widely used phosphate and phosphonate.
Because of the problems of high volatility, poor thermal stability and toxicity of phosphorus halogen flame retardants, a large number of new organophosphorous flame retardants have been developed, and some of them have been industrialized in recent years. In addition, the flame retardants with nitrogen and silicon as flame retardants have attracted wide attention because of their advantages of high efficiency, low smoke, low toxicity, green environmental protection and so on.
Therefore, in the molecular design of Organophosphorous flame retardants, phosphorus nitrogen flame retardants or phosphorus silicon flame retardants can often play synergistic flame retardancy with the introduction of nitrogen or silicon elements. BDP and RDP are new type of halogen-free environment-friendly organophosphorus flame retardants developed in recent years.
Compared with the traditional organophosphorus flame retardants, they have the characteristics of large molecular weight, high thermal stability, low volatility and high flame retardancy efficiency. BDP is slightly superior to RDP in terms of thermal stability and hydrolytic stability. As an additive flame retardant, it is mainly used in thermoplastic engineering plastics, such as PC / ABS blends, polyethylene and polyurethane foam, showing excellent flame retardancy.
Silicone flame retardant is a new type of high efficiency, low toxicity, anti melt dropping and environmentally friendly halogen-free flame retardant, and also a kind of carbon - forming smoke suppressant. In addition to the excellent flame retardancy given to the base material, the silicone flame retardant can also improve the processing performance and heat resistance of the base material. At present, silicone flame retardants are mainly silicone resin flame retardant and polysiloxane flame retardant. The way of flame-retardant can be directly adding silicone flame retardants to plastics, or by embedding some chains containing functional groups (such as terminal hydroxyl, amino or epoxy groups) into some polymers.
Silicon resin is a crosslinked semi inorganic polymer that uses Si-O-Si as the main chain, and the organic base is connected to the silicon atom. The side group of the silicon resin molecule is called pure silicon resin when it is hydrogen bond or organic group. Silicone resin has excellent heat resistance, weatherability, flame retardancy and electrical insulation.
Polysiloxane is a polymer that contains the Si-O-Si, Si-O-B and B-O-B bonds on the main chain of the molecule. The synergistic flame retardancy ofB and Si on the same molecular chain is achieved by forming a copolymer of boron in the form of chemical bonds with siloxane.
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.
Typical organosilicon flame retardants, such as TGPS (two chloride two methyl silane modified resin), and CPQS (double ring cage like four coordination silicon).
The research of nitrogen flame retardants started late, and there are not many varieties currently used, mainly for added type. The commonly used nitrogen flame retardants are melamine, melamine cyanuric acid (MCA) and so on. As a new type of high efficient flame retardant, nitrogen - based flame retardant has been widely studied and paid more attention in recent years. According to the existing literature, the flame retardant effect of nitrogen based flame retardants is not good, but the intumescent flame retardant system combined with phosphorus containing flame retardant has good flame retardancy.
The synthetic method of anhydrous magnesium carbonate flame retardant is simple and can be produced at normal temperature and atmospheric pressure. It is an inorganic flame retardant which is expected to replace aluminum hydroxide and magnesium hydroxide. Inorganic flame retardants are an important part of halogen free flame retardants. Among them, two kinds of flame retardants, aluminum hydroxide and magnesium hydroxide, occupy an important position. Both of them are fast decomposed, endothermic, cooling and releasing steam when they reach the decomposition temperature.
The anhydrous magnesium carbonate flame retardant is characterized by the fact that it releases carbon dioxide with fire extinguishing function besides the unit mass heat absorption characteristics. The use of anhydrous magnesium carbonate as a flame retardant is like a polymer matrix material carrying a carbon dioxide fire extinguisher. The carbon dioxide released has formed a "carbon dioxide gas film" around the burning substrate and isolated the combustion supporting air. From this feature, the anhydrous magnesium carbonate flame retardant is suitable for higher electrical insulation performance, such as wire and cable, etc.
Shen stressed that, at present, the so-called magnesium carbonate products in the market, in addition to the natural magnesite magnesium carbonate, are all hydrated alkaline magnesium carbonate. In the existing production process of alkaline magnesium carbonate at home and abroad, only the technology developed by them can produce a single phase of magnesium carbonate.
The first ammonia and carbon dioxide as a whole cycle process route of raw materials, to minimize the consumption of raw materials; anhydrous magnesium carbonate production for high purity products containing more than 46.8% of Magnesium Oxide, but also can be used as flame retardant magnesium salt has many uses; wide source, low price. Both the raw magnesite powder or calcined magnesite powder, but also Magnesium Sulfate industrial or other industrial waste liquid can also be Magnesium Sulfate, seawater magnesium chloride or Saline Lake bischofite etc.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Because ordinary intumescent flame retardants are easy to absorb moisture, have large amounts of additives and poor compatibility with plastics, they need to be modified to improve their compatibility with plastics or share them with synergistic substances, so as to improve their flame retardancy.
Of all kinds of flame retardants, the organic flame retardant of PC / ABS blends occupies an important position. The research on organophosphorus flame retardants started in the early part of this century. PC / ABS blends, organic flame retardants, mostly have the advantages of low smoke, non-toxic, low halogen, halogen free, etc., which conform to the development direction of flame retardants, and have good prospects for development.
PC / ABS blends of organic flame retardants including phosphate, phosphite, phosphonate, organic phosphorus and phosphorus and phosphorus, heterocyclic compounds and polymer phosphorus (phosphine) ester, but is the most widely used phosphate and phosphonate.
Because of the problems of high volatility, poor thermal stability and toxicity of phosphorus halogen flame retardants, a large number of new organophosphorous flame retardants have been developed, and some of them have been industrialized in recent years. In addition, the flame retardants with nitrogen and silicon as flame retardants have attracted wide attention because of their advantages of high efficiency, low smoke, low toxicity, green environmental protection and so on.
Therefore, in the molecular design of Organophosphorous flame retardants, phosphorus nitrogen flame retardants or phosphorus silicon flame retardants can often play synergistic flame retardancy with the introduction of nitrogen or silicon elements. BDP and RDP are new type of halogen-free environment-friendly organophosphorus flame retardants developed in recent years.
Compared with the traditional organophosphorus flame retardants, they have the characteristics of large molecular weight, high thermal stability, low volatility and high flame retardancy efficiency. BDP is slightly superior to RDP in terms of thermal stability and hydrolytic stability. As an additive flame retardant, it is mainly used in thermoplastic engineering plastics, such as PC / ABS blends, polyethylene and polyurethane foam, showing excellent flame retardancy.
Silicone flame retardant is a new type of high efficiency, low toxicity, anti melt dropping and environmentally friendly halogen-free flame retardant, and also a kind of carbon - forming smoke suppressant. In addition to the excellent flame retardancy given to the base material, the silicone flame retardant can also improve the processing performance and heat resistance of the base material. At present, silicone flame retardants are mainly silicone resin flame retardant and polysiloxane flame retardant. The way of flame-retardant can be directly adding silicone flame retardants to plastics, or by embedding some chains containing functional groups (such as terminal hydroxyl, amino or epoxy groups) into some polymers.
Silicon resin is a crosslinked semi inorganic polymer that uses Si-O-Si as the main chain, and the organic base is connected to the silicon atom. The side group of the silicon resin molecule is called pure silicon resin when it is hydrogen bond or organic group. Silicone resin has excellent heat resistance, weatherability, flame retardancy and electrical insulation.
Polysiloxane is a polymer that contains the Si-O-Si, Si-O-B and B-O-B bonds on the main chain of the molecule. The synergistic flame retardancy ofB and Si on the same molecular chain is achieved by forming a copolymer of boron in the form of chemical bonds with siloxane.
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.
Typical organosilicon flame retardants, such as TGPS (two chloride two methyl silane modified resin), and CPQS (double ring cage like four coordination silicon).
The research of nitrogen flame retardants started late, and there are not many varieties currently used, mainly for added type. The commonly used nitrogen flame retardants are melamine, melamine cyanuric acid (MCA) and so on. As a new type of high efficient flame retardant, nitrogen - based flame retardant has been widely studied and paid more attention in recent years. According to the existing literature, the flame retardant effect of nitrogen based flame retardants is not good, but the intumescent flame retardant system combined with phosphorus containing flame retardant has good flame retardancy.
The synthetic method of anhydrous magnesium carbonate flame retardant is simple and can be produced at normal temperature and atmospheric pressure. It is an inorganic flame retardant which is expected to replace aluminum hydroxide and magnesium hydroxide. Inorganic flame retardants are an important part of halogen free flame retardants. Among them, two kinds of flame retardants, aluminum hydroxide and magnesium hydroxide, occupy an important position. Both of them are fast decomposed, endothermic, cooling and releasing steam when they reach the decomposition temperature.
The anhydrous magnesium carbonate flame retardant is characterized by the fact that it releases carbon dioxide with fire extinguishing function besides the unit mass heat absorption characteristics. The use of anhydrous magnesium carbonate as a flame retardant is like a polymer matrix material carrying a carbon dioxide fire extinguisher. The carbon dioxide released has formed a "carbon dioxide gas film" around the burning substrate and isolated the combustion supporting air. From this feature, the anhydrous magnesium carbonate flame retardant is suitable for higher electrical insulation performance, such as wire and cable, etc.
Shen stressed that, at present, the so-called magnesium carbonate products in the market, in addition to the natural magnesite magnesium carbonate, are all hydrated alkaline magnesium carbonate. In the existing production process of alkaline magnesium carbonate at home and abroad, only the technology developed by them can produce a single phase of magnesium carbonate.
The first ammonia and carbon dioxide as a whole cycle process route of raw materials, to minimize the consumption of raw materials; anhydrous magnesium carbonate production for high purity products containing more than 46.8% of Magnesium Oxide, but also can be used as flame retardant magnesium salt has many uses; wide source, low price. Both the raw magnesite powder or calcined magnesite powder, but also Magnesium Sulfate industrial or other industrial waste liquid can also be Magnesium Sulfate, seawater magnesium chloride or Saline Lake bischofite etc.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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