News Details
Inorganic flame retardants for PVC cable materials
2017-11-30 11:28:43
Inorganic flame retardants for PVC cable materials
For a long time, PVC cable materials are widely used, but the limiting oxygen index of polyolefin is very low, and its flame retardancy is poor. It is easy to burn when heated or discharged, which restricts the use of polyolefin in cable materials. After two years of research, Zhang Ling and other scientists and technicians developed the technology of preparing inorganic nano flame retardants, combined with polyolefin to make the flame retardant reach the nanometer level dispersion in the matrix and enhance the interfacial adhesion between the flame retardant and the matrix, so as to achieve the improvement of the flame retardant efficiency.
Nano inorganic flame retardant cable materials developed with respect to the cable material preparation using micro flame retardant, flame retardant agent not only reduced by 8%, and the flame retardant performance increased from 33.2% to 36.2% microns, and solved the flame retardant filling to reduce the large amount of difficultprocessing and mechanical performance, as halogen-free flame retardant cable materials provide localization the innovation of technology.
At present, the inorganic flame retardants of PVC cable materials are from Al2O3 system, antimony oxide system, boron system, copper system and inorganic phosphorus system. The main varieties include magnesium hydroxide, alumina trihydrate, three two, three colloidal antimony oxide, antimony oxide two low hydrated zinc borate, boric acid, zinc oxide, zinc phosphate, two key, three key, oxidation of zinc aluminate, calcium aluminate, ammonium polyphosphate, fluorine sodium borate, boric acid and red phosphorus etc..
At present, the domestic flame retardant is still mainly used as organic flame retardant, but the proportion of inorganic flame retardants in PVC cable material is increasing year by year. Red phosphorus as flame retardants for plastics, the amount is limited but the effect is very obvious. Burning of red phosphorus is an endothermic reaction, and the formation of carbide layer. But the red phosphorus combustion value, the excessive amount of the combustion heat release reaction is enough to meet its needs, will promote the further combustion of plastic, thus unable to play the role of flame retardant.
Phosphorus as flame retardant plastic when the dosage is usually in the following. Metal hydroxide flame retardants are required to be added in a large amount to have obvious flame retardancy, but a large amount of addition will lead to a decline in processing performance and mechanical properties. In order to make the additive not only satisfy the flame retardant effect, but also does not affect the performance of some plastics, the ultrafine and surface treatment technology of inorganic flame retardants has become the key point of the development of plastic flame-retardant technology.
Surface modification of inorganic flame retardants for PVC cable materials, on the one hand, improve the weakness of plastics processing, and on the other hand, improve the compatibility of flame retardants and plastics, that is, not only improve the processability of flame retardant plastics, but also improve the mechanical properties and flame retardancy. The surface treatment agents of inorganic flame retardant mainly include the coupling agent, silane coupling agent, aluminate vinegar, hard acetic acid and salt and other fatty acid salts.
Different surface treatment agents have different treatment effects, which will make flame retardant plastics have different properties. Therefore, determining suitable methods, selecting suitable surface treatment agents and determining the best dosage are very important for improving the effect of surface treatment. The development direction of flame retardant technology is the research direction of flame retardancy technology. The research of carbon technology is the new direction of technology development of flame retardancy. That is to study thermoplastic polymer in condensed phase instead of enhancing flame retardant reaction in gas phase to produce carbon and then achieve flame retardant and smoke elimination purposes.
Triphenyl Phosphate (TPP)
Flame retardant tpp This product has good transparency , flexibility and good benefits antimicrobial resistance, with water, oil, electrical insulation and compatibility. Mainly for the cellulose resin, a vinyl resin, natural rubber and synthetic rubber flame retardant plasticizers may also be used for acetate and glycerol triacetate film thin , rigid polyurethane foam , phenolic resin, and engineering plastics such as resistance PPO burning plasticized . Flame Retardant tpp manufacturer price mainly in Jiangsu .
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.
The general method is by adding additives to promote carbon reaction or cause crosslinking reaction to achieve the ultimate purpose of denial of combustion. For example, researchers in silica gel, potassium carbonate and a multi light base assembly, such as polyvinyl alcohol and cellulose, react to form silica gel oxide and cross-linking reaction to prevent combustion. The technology of smoke elimination is a very important research topic at home and abroad.
Ammonium polyphosphate (APP) is a good inorganic flame retardant. It is a relatively active field of phosphorus flame retardants. Its appearance is white powder, the decomposition temperature is >256 degrees, the degree of polymerization is water soluble between 1O 2O, and the degree of polymerization is greater than 2O, which is insoluble in water. APP is cheaper than organic flame retardant, low toxicity and good heat stability. It can be used alone or in combination with other flame retardants for the flame retardancy of plastics. At high temperature, APP is rapidly decomposed into ammonia and polyphosphoric acid, and ammonia can dilute the oxygen concentration in the gas phase, thus preventing the combustion. Polyphosphoric acid is a strong dehydrating agent, which can dehydrate the polymer to form a carbon layer, isolate the contact of the polymer from the oxygen, and prevent the combustion in the solid phase.
Zhang Ling from East China University of Science and Technology and Li Chunzhong professor of research project of inorganic nano composite flame retardant polyolefin cable material developed, not only to improve the flame retardant properties of polyolefin achieved an important breakthrough, but also for the halogen free flame retardant cable material localization provides innovative technology.
Melamine phosphate, also known as melamine polyphosphate (FR-MP). It is a kind of nitrogen containing phosphorus containing flame retardant which appeared in the middle of 80s twentieth Century. Melamine phosphate flame retardant, with high nitrogen content, moderate phosphorus content, good thermal stability, no moisture absorption and low smoke volume, has been widely applied in the world, and will also have broad prospects in China.
Because melamine phosphate has good thermal stability, good foaming effect and good flame retardant effect, it is widely used in the flame retardant of thermoplastic and thermosetting formulations, especially for dehydration carbon generation catalyst and foaming agent in intumescent flame retardant system and intumescent fire retardant coating.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
For a long time, PVC cable materials are widely used, but the limiting oxygen index of polyolefin is very low, and its flame retardancy is poor. It is easy to burn when heated or discharged, which restricts the use of polyolefin in cable materials. After two years of research, Zhang Ling and other scientists and technicians developed the technology of preparing inorganic nano flame retardants, combined with polyolefin to make the flame retardant reach the nanometer level dispersion in the matrix and enhance the interfacial adhesion between the flame retardant and the matrix, so as to achieve the improvement of the flame retardant efficiency.
Nano inorganic flame retardant cable materials developed with respect to the cable material preparation using micro flame retardant, flame retardant agent not only reduced by 8%, and the flame retardant performance increased from 33.2% to 36.2% microns, and solved the flame retardant filling to reduce the large amount of difficultprocessing and mechanical performance, as halogen-free flame retardant cable materials provide localization the innovation of technology.
At present, the inorganic flame retardants of PVC cable materials are from Al2O3 system, antimony oxide system, boron system, copper system and inorganic phosphorus system. The main varieties include magnesium hydroxide, alumina trihydrate, three two, three colloidal antimony oxide, antimony oxide two low hydrated zinc borate, boric acid, zinc oxide, zinc phosphate, two key, three key, oxidation of zinc aluminate, calcium aluminate, ammonium polyphosphate, fluorine sodium borate, boric acid and red phosphorus etc..
At present, the domestic flame retardant is still mainly used as organic flame retardant, but the proportion of inorganic flame retardants in PVC cable material is increasing year by year. Red phosphorus as flame retardants for plastics, the amount is limited but the effect is very obvious. Burning of red phosphorus is an endothermic reaction, and the formation of carbide layer. But the red phosphorus combustion value, the excessive amount of the combustion heat release reaction is enough to meet its needs, will promote the further combustion of plastic, thus unable to play the role of flame retardant.
Phosphorus as flame retardant plastic when the dosage is usually in the following. Metal hydroxide flame retardants are required to be added in a large amount to have obvious flame retardancy, but a large amount of addition will lead to a decline in processing performance and mechanical properties. In order to make the additive not only satisfy the flame retardant effect, but also does not affect the performance of some plastics, the ultrafine and surface treatment technology of inorganic flame retardants has become the key point of the development of plastic flame-retardant technology.
Surface modification of inorganic flame retardants for PVC cable materials, on the one hand, improve the weakness of plastics processing, and on the other hand, improve the compatibility of flame retardants and plastics, that is, not only improve the processability of flame retardant plastics, but also improve the mechanical properties and flame retardancy. The surface treatment agents of inorganic flame retardant mainly include the coupling agent, silane coupling agent, aluminate vinegar, hard acetic acid and salt and other fatty acid salts.
Different surface treatment agents have different treatment effects, which will make flame retardant plastics have different properties. Therefore, determining suitable methods, selecting suitable surface treatment agents and determining the best dosage are very important for improving the effect of surface treatment. The development direction of flame retardant technology is the research direction of flame retardancy technology. The research of carbon technology is the new direction of technology development of flame retardancy. That is to study thermoplastic polymer in condensed phase instead of enhancing flame retardant reaction in gas phase to produce carbon and then achieve flame retardant and smoke elimination purposes.
Triphenyl Phosphate (TPP)
Flame retardant tpp This product has good transparency , flexibility and good benefits antimicrobial resistance, with water, oil, electrical insulation and compatibility. Mainly for the cellulose resin, a vinyl resin, natural rubber and synthetic rubber flame retardant plasticizers may also be used for acetate and glycerol triacetate film thin , rigid polyurethane foam , phenolic resin, and engineering plastics such as resistance PPO burning plasticized . Flame Retardant tpp manufacturer price mainly in Jiangsu .
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.
The general method is by adding additives to promote carbon reaction or cause crosslinking reaction to achieve the ultimate purpose of denial of combustion. For example, researchers in silica gel, potassium carbonate and a multi light base assembly, such as polyvinyl alcohol and cellulose, react to form silica gel oxide and cross-linking reaction to prevent combustion. The technology of smoke elimination is a very important research topic at home and abroad.
Ammonium polyphosphate (APP) is a good inorganic flame retardant. It is a relatively active field of phosphorus flame retardants. Its appearance is white powder, the decomposition temperature is >256 degrees, the degree of polymerization is water soluble between 1O 2O, and the degree of polymerization is greater than 2O, which is insoluble in water. APP is cheaper than organic flame retardant, low toxicity and good heat stability. It can be used alone or in combination with other flame retardants for the flame retardancy of plastics. At high temperature, APP is rapidly decomposed into ammonia and polyphosphoric acid, and ammonia can dilute the oxygen concentration in the gas phase, thus preventing the combustion. Polyphosphoric acid is a strong dehydrating agent, which can dehydrate the polymer to form a carbon layer, isolate the contact of the polymer from the oxygen, and prevent the combustion in the solid phase.
Zhang Ling from East China University of Science and Technology and Li Chunzhong professor of research project of inorganic nano composite flame retardant polyolefin cable material developed, not only to improve the flame retardant properties of polyolefin achieved an important breakthrough, but also for the halogen free flame retardant cable material localization provides innovative technology.
Melamine phosphate, also known as melamine polyphosphate (FR-MP). It is a kind of nitrogen containing phosphorus containing flame retardant which appeared in the middle of 80s twentieth Century. Melamine phosphate flame retardant, with high nitrogen content, moderate phosphorus content, good thermal stability, no moisture absorption and low smoke volume, has been widely applied in the world, and will also have broad prospects in China.
Because melamine phosphate has good thermal stability, good foaming effect and good flame retardant effect, it is widely used in the flame retardant of thermoplastic and thermosetting formulations, especially for dehydration carbon generation catalyst and foaming agent in intumescent flame retardant system and intumescent fire retardant coating.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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