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Halogen free flame retardant polyethylene
2017-11-13 10:48:20
Halogen free flame retardant polyethylene
Expandable graphite is a kind of halogen free flame retardant polyethylene, which is prepared by chemical treatment of natural graphite. The flame retardant mechanism is: when the temperature is higher than 200 degrees at an instant, because of the decomposition of the compounds in the lattice between the graphite layers, the graphite expands hundreds of times along the axis of the structure, and reaches the maximum volume at 1100 degrees centigrade, and the maximum volume can be expanded by 280 times.
With this characteristic, the flame will be extinguished by expanding the volume instantaneously during the fire.
Yang Yongfang and other halogen-free flame retardant expandable graphite flame retardant polyethylene, when the amount of expandable graphite is 30 parts, polyethylene oxygen index of more than 27, however, the mechanical properties of polyethylene has become very poor, tensile strength below 9MPa.
Xie of expanded graphite synergy more polyethylene halogen-free flame retardant polyolefin was studied after thermal oxidative stability and oxygen index of EG II HFFR PI PO system are significantly improved, and the combustion of HRR had significantly decreased. Finally, the materials with excellent mechanical and flame retardant properties were prepared by using EVA as compatibilizer.
Xie FTIR, XPS, WXAD on the use of expandable graphite expansion synergistic flame retardant LLDPE were studied: (1) LLDPE high temperature cracking fracture caused by its main chain and generate a variety of hot oxygen products; (2) the degradation of LLDPE with the addition of expandable graphite and is slow, with increasing heat oxygen degradation time, temperature and increased; (3) WAXD tests show that the crystalline structure of LLDPE II EG and LLDPE II EG II HFFR has been partially or completely destroyed in the process of thermal degradation, while LLDPE PI EG PI HFFR crystal structure is changing because of the decomposition products of LLDPE strand breaks and FR induced.
The problem of flame retardancy of polyethylene has been paid more and more attention. Although halogen flame retardants have the advantages of less addition and little impact on the physical and mechanical properties of the products, the use of halogenated flame retardants will be more and more limited due to its easy to cause two pollution. Although the halogen free flame retardants have some deficiencies in the flame retardant effect and compatibility with the resin matrix, many new flame retardants are being developed to overcome the above shortcomings.
For example, ammonium polyphosphate and ammonium polyphosphate and their corresponding intumescent flame retardants are active research fields of phosphorus based flame retardants. As a halogen-free flame retardant, its prospect is very broad. However, the problems of thermal stability, water resistance, frost resistance and processability are still worthy of study in the future.
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.
The insoluble ammonium polyphosphate flame retardant, melamine compound treatment with ammonium salt particles coated with melamine with an active hydrogen reaction of functional groups, so as to form an adhesive particle surface, and then the particles are bonded together by polyphosphate particle size larger than 15 m, the chemical properties of the flame retardant the stable. In a word, non pollution and no two pollution type flame retardants are the trend of research and development of flame retardants for PE in the future.
Wang Lili use of hydroxyl silicone oil processing Mg (OH) 2 and Al (OH) 3, the use of treated Mg (OH) 2 and Al (OH) 3 PE ATH II MH II high fill (ATH: MH=2: 1) system in the oxygen index increased at the same time, the impact strength and elongation at break are the great increase of the form of the fracture changes from brittle fracture to ductile fracture.
When the fire occurs, halogen containing flame retardant material will produce a large number of smoke and toxic corrosive halogenated hydrogen gas in the process of flame retardant, causing two times of harm. In February 2003, the EU promulgated the RoHs (The Restriction of Hazardous Substancesin Electrical and Electronic Equip-ment, Directive 2002/95/EC) and WEEE (Waste Electri-cai and Electronic Equipment, Directive 2002/96/EC) two instructions, the former is about the limit and prohibit the use of certain toxic and harmful substances and elements in electrical and electronic equipment in the instruction, the latter is a waste recycling electrical and electronic equipment directive. The two directives were converted into the laws of the 15 member states of the European Union in August 2004. The WEEE directive came into effect in August 2005 and the RoHs directive came into force in July 2006.
Western Europe is in the building materials and other industries to implement fire retardant classification methods and new testing standards, Chinese has the approval of building materials and products burning performance grade of the national standard, with the western new standard this standard common features, namely in the evaluation of flame retardant performance, emphasizes the product of the heat release rate, the development rate of fire, the smoke of burning and corrosive and toxic, in order to pass the new standard, the traditional halogen flame retardant materials will become incapable of action, people will turn to the use of carbon into flame retardant plastics (especially intumescent flame retardant plastics) and flame retardant thermosetting plastics, which is in line with the RoHS directive on the restriction of hazardous substances and prohibit the use of requirements the.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Expandable graphite is a kind of halogen free flame retardant polyethylene, which is prepared by chemical treatment of natural graphite. The flame retardant mechanism is: when the temperature is higher than 200 degrees at an instant, because of the decomposition of the compounds in the lattice between the graphite layers, the graphite expands hundreds of times along the axis of the structure, and reaches the maximum volume at 1100 degrees centigrade, and the maximum volume can be expanded by 280 times.
With this characteristic, the flame will be extinguished by expanding the volume instantaneously during the fire.
Yang Yongfang and other halogen-free flame retardant expandable graphite flame retardant polyethylene, when the amount of expandable graphite is 30 parts, polyethylene oxygen index of more than 27, however, the mechanical properties of polyethylene has become very poor, tensile strength below 9MPa.
Xie of expanded graphite synergy more polyethylene halogen-free flame retardant polyolefin was studied after thermal oxidative stability and oxygen index of EG II HFFR PI PO system are significantly improved, and the combustion of HRR had significantly decreased. Finally, the materials with excellent mechanical and flame retardant properties were prepared by using EVA as compatibilizer.
Xie FTIR, XPS, WXAD on the use of expandable graphite expansion synergistic flame retardant LLDPE were studied: (1) LLDPE high temperature cracking fracture caused by its main chain and generate a variety of hot oxygen products; (2) the degradation of LLDPE with the addition of expandable graphite and is slow, with increasing heat oxygen degradation time, temperature and increased; (3) WAXD tests show that the crystalline structure of LLDPE II EG and LLDPE II EG II HFFR has been partially or completely destroyed in the process of thermal degradation, while LLDPE PI EG PI HFFR crystal structure is changing because of the decomposition products of LLDPE strand breaks and FR induced.
The problem of flame retardancy of polyethylene has been paid more and more attention. Although halogen flame retardants have the advantages of less addition and little impact on the physical and mechanical properties of the products, the use of halogenated flame retardants will be more and more limited due to its easy to cause two pollution. Although the halogen free flame retardants have some deficiencies in the flame retardant effect and compatibility with the resin matrix, many new flame retardants are being developed to overcome the above shortcomings.
For example, ammonium polyphosphate and ammonium polyphosphate and their corresponding intumescent flame retardants are active research fields of phosphorus based flame retardants. As a halogen-free flame retardant, its prospect is very broad. However, the problems of thermal stability, water resistance, frost resistance and processability are still worthy of study in the future.
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.
The insoluble ammonium polyphosphate flame retardant, melamine compound treatment with ammonium salt particles coated with melamine with an active hydrogen reaction of functional groups, so as to form an adhesive particle surface, and then the particles are bonded together by polyphosphate particle size larger than 15 m, the chemical properties of the flame retardant the stable. In a word, non pollution and no two pollution type flame retardants are the trend of research and development of flame retardants for PE in the future.
Wang Lili use of hydroxyl silicone oil processing Mg (OH) 2 and Al (OH) 3, the use of treated Mg (OH) 2 and Al (OH) 3 PE ATH II MH II high fill (ATH: MH=2: 1) system in the oxygen index increased at the same time, the impact strength and elongation at break are the great increase of the form of the fracture changes from brittle fracture to ductile fracture.
When the fire occurs, halogen containing flame retardant material will produce a large number of smoke and toxic corrosive halogenated hydrogen gas in the process of flame retardant, causing two times of harm. In February 2003, the EU promulgated the RoHs (The Restriction of Hazardous Substancesin Electrical and Electronic Equip-ment, Directive 2002/95/EC) and WEEE (Waste Electri-cai and Electronic Equipment, Directive 2002/96/EC) two instructions, the former is about the limit and prohibit the use of certain toxic and harmful substances and elements in electrical and electronic equipment in the instruction, the latter is a waste recycling electrical and electronic equipment directive. The two directives were converted into the laws of the 15 member states of the European Union in August 2004. The WEEE directive came into effect in August 2005 and the RoHs directive came into force in July 2006.
Western Europe is in the building materials and other industries to implement fire retardant classification methods and new testing standards, Chinese has the approval of building materials and products burning performance grade of the national standard, with the western new standard this standard common features, namely in the evaluation of flame retardant performance, emphasizes the product of the heat release rate, the development rate of fire, the smoke of burning and corrosive and toxic, in order to pass the new standard, the traditional halogen flame retardant materials will become incapable of action, people will turn to the use of carbon into flame retardant plastics (especially intumescent flame retardant plastics) and flame retardant thermosetting plastics, which is in line with the RoHS directive on the restriction of hazardous substances and prohibit the use of requirements the.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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