News Details
Composite flame retardant for Polypropylene
2017-11-15 15:44:26
Composite flame retardant for Polypropylene
Zhang Zhonghou studied with expandable graphite based flame retardant, red phosphorus as synergistic agent of polypropylene composite flame retardant. The results show that when the polypropylene composite flame retardant was 10%, expandable graphite and red phosphorus ratio for 2:1, the mechanical properties of composite materials and flame retardant performance indicators have reached the maximum value, the oxygen index is 23.4%, the tensile strength is 35.9MPa, the notched impact strength is 0.7kJ/m2, the best comprehensive performance.
Li Xu et al. Studied the influence of compound flame retardant on Polypropylene by using cyanuric chloride, two ethanolamine and ethylenediamine as raw materials. A new type of three triazine charring agent (CA) was designed and synthesized, which was compounded with ammonium polyphosphate and MA to flame retardant polypropylene. The results show that the composite IFR greatly improves the flame retardancy of polypropylene.
The effect of composite flame retardant on PP was studied. The results showed that when IFR was composed of 80.3% ammonium polyphosphate, 13% MA and 6.7% CA, the flame retardant effect of PP was the best. When the addition amount of IFR is 30%, the limiting oxygen index of flame retardant polypropylene reaches 35.5%; when the addition of IFR is only 25%, the flame retardancy of flame retardant polypropylene can pass UL-94V-0 grade, and the limiting oxygen index reaches 32.5%.
Recently developed a new type of halogen-free flame retardant expandable graphite, carbon layer can be formed on the surface of polymer tough, combustible matter separated from the heat source and will absorb heat in the expansion process, reduce the system temperature while the release of ions in the interlayer, promote the dehydration of carbon, and the combination of combustion free radical chain reaction to interrupt. When the expandable graphite and red phosphorus, ammonium polyphosphate, melamine phosphate mixed use, can produce synergistic effect, adding few can achieve the purpose of flame retarding.
Lei Changming et al. Made use of expandable graphite as the main flame retardant and MRP as the flame retardant synergistic agent to prepare flame retardant polypropylene composites.
When the ratio of expandable graphite to MRP is more than 2, the flame retardant effect is the best. After the content of flame retardant reached 30%, the flame retardant effect was greatly improved, and the oxygen index was more than 28%. The compatibilizer maleic anhydride grafted polypropylene (PP -g-MAH) can improve the compatibility between flame retardant and polypropylene, improve the bonding strength, improve the quality of carbon layer, and improve the oxygen index of the material. When the dosage of polypropylene -g-MAH is 30%, the oxygen index of the material reaches 31.4%.
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.
Jiang Shu et al. Studied the flame retardancy and microstructure of the expanded graphite filled polypropylene composites prepared by different processing methods. The effects of the content and structure of expandable graphite on the oxygen index and the horizontal combustion performance of polypropylene were discussed. The results show that the flame retardancy of the composites increases with the increase of the content of expandable graphite, and is also affected by the structure of expandable graphite particles. The strong shear action in the process will destroy the integrity of expandable graphite particle structure, and reduce the flame retardant effect greatly. Therefore, the compression molding method is obviously superior to injection molding.
The results show that silicon compounds have obvious flame retardant effects, whether they are additives of polymers or blends with polymers. Silicon flame retardant can be divided into two categories: inorganic silicon and organic silicon flame retardant. Inorganic silicon is mainly silicon dioxide, silicone mainly silicone oil, silicone resin, silicone rubber and organic silane amide alcohol. Silicone flame retardants have excellent properties such as moisture resistance, hydrophobicity, electrical insulation, high and low temperature resistance, good chemical stability, and the flame retardant effect of silicone flame retardant is better than that of inorganic silicon flame retardant, and it has good compatibility with polypropylene, which is the main development direction of silicone flame retardants.
The flame retardant mechanism of silicone flame retardant is that the vinyl in organic silicate promotes the formation of silicon carbide coking isolation layer, prevents the contact between polymer and oxygen in air, inhibits the release of harmful gas and the formation of smoke, so as to achieve the effect of flame retardant and smoke suppression. Silicone flame retardant not only can improve the flame retardancy and smoke suppression of polypropylene, but also can improve the mechanical properties and electrical properties of polypropylene.
For polypropylene, SFR-100 and SFR-1000 are more economical and effective flame retardants containing silicon. They do not contain halogen, antimony, and by combining the structure similar to polymer and partially crosslinked interpenetrating network, so they can not migrate to the surface of material, improve the surface smoothness of the polypropylene can, but does not change the other surface properties, has no effect on the adhesion of substrates. When the content of SFR-100 is 25%, the flame retardant grade of polypropylene can reach UL-94V-0 grade, and the original properties of the base material can be maintained. If the dosage of polypropylene is improved, the polypropylene material with excellent flame retardancy and smoke suppression can be obtained.
Because of its quantum size effect, surface effect, interface effect, small size effect and superplasticity, nano particles can endow polypropylene with excellent physical and mechanical properties and flame retardancy. In addition to nano inorganic flame retardant, layered clay and carbon nanotubes flame retardant polypropylene materials have become the development of the front end products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Zhang Zhonghou studied with expandable graphite based flame retardant, red phosphorus as synergistic agent of polypropylene composite flame retardant. The results show that when the polypropylene composite flame retardant was 10%, expandable graphite and red phosphorus ratio for 2:1, the mechanical properties of composite materials and flame retardant performance indicators have reached the maximum value, the oxygen index is 23.4%, the tensile strength is 35.9MPa, the notched impact strength is 0.7kJ/m2, the best comprehensive performance.
Li Xu et al. Studied the influence of compound flame retardant on Polypropylene by using cyanuric chloride, two ethanolamine and ethylenediamine as raw materials. A new type of three triazine charring agent (CA) was designed and synthesized, which was compounded with ammonium polyphosphate and MA to flame retardant polypropylene. The results show that the composite IFR greatly improves the flame retardancy of polypropylene.
The effect of composite flame retardant on PP was studied. The results showed that when IFR was composed of 80.3% ammonium polyphosphate, 13% MA and 6.7% CA, the flame retardant effect of PP was the best. When the addition amount of IFR is 30%, the limiting oxygen index of flame retardant polypropylene reaches 35.5%; when the addition of IFR is only 25%, the flame retardancy of flame retardant polypropylene can pass UL-94V-0 grade, and the limiting oxygen index reaches 32.5%.
Recently developed a new type of halogen-free flame retardant expandable graphite, carbon layer can be formed on the surface of polymer tough, combustible matter separated from the heat source and will absorb heat in the expansion process, reduce the system temperature while the release of ions in the interlayer, promote the dehydration of carbon, and the combination of combustion free radical chain reaction to interrupt. When the expandable graphite and red phosphorus, ammonium polyphosphate, melamine phosphate mixed use, can produce synergistic effect, adding few can achieve the purpose of flame retarding.
Lei Changming et al. Made use of expandable graphite as the main flame retardant and MRP as the flame retardant synergistic agent to prepare flame retardant polypropylene composites.
When the ratio of expandable graphite to MRP is more than 2, the flame retardant effect is the best. After the content of flame retardant reached 30%, the flame retardant effect was greatly improved, and the oxygen index was more than 28%. The compatibilizer maleic anhydride grafted polypropylene (PP -g-MAH) can improve the compatibility between flame retardant and polypropylene, improve the bonding strength, improve the quality of carbon layer, and improve the oxygen index of the material. When the dosage of polypropylene -g-MAH is 30%, the oxygen index of the material reaches 31.4%.
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.
Jiang Shu et al. Studied the flame retardancy and microstructure of the expanded graphite filled polypropylene composites prepared by different processing methods. The effects of the content and structure of expandable graphite on the oxygen index and the horizontal combustion performance of polypropylene were discussed. The results show that the flame retardancy of the composites increases with the increase of the content of expandable graphite, and is also affected by the structure of expandable graphite particles. The strong shear action in the process will destroy the integrity of expandable graphite particle structure, and reduce the flame retardant effect greatly. Therefore, the compression molding method is obviously superior to injection molding.
The results show that silicon compounds have obvious flame retardant effects, whether they are additives of polymers or blends with polymers. Silicon flame retardant can be divided into two categories: inorganic silicon and organic silicon flame retardant. Inorganic silicon is mainly silicon dioxide, silicone mainly silicone oil, silicone resin, silicone rubber and organic silane amide alcohol. Silicone flame retardants have excellent properties such as moisture resistance, hydrophobicity, electrical insulation, high and low temperature resistance, good chemical stability, and the flame retardant effect of silicone flame retardant is better than that of inorganic silicon flame retardant, and it has good compatibility with polypropylene, which is the main development direction of silicone flame retardants.
The flame retardant mechanism of silicone flame retardant is that the vinyl in organic silicate promotes the formation of silicon carbide coking isolation layer, prevents the contact between polymer and oxygen in air, inhibits the release of harmful gas and the formation of smoke, so as to achieve the effect of flame retardant and smoke suppression. Silicone flame retardant not only can improve the flame retardancy and smoke suppression of polypropylene, but also can improve the mechanical properties and electrical properties of polypropylene.
For polypropylene, SFR-100 and SFR-1000 are more economical and effective flame retardants containing silicon. They do not contain halogen, antimony, and by combining the structure similar to polymer and partially crosslinked interpenetrating network, so they can not migrate to the surface of material, improve the surface smoothness of the polypropylene can, but does not change the other surface properties, has no effect on the adhesion of substrates. When the content of SFR-100 is 25%, the flame retardant grade of polypropylene can reach UL-94V-0 grade, and the original properties of the base material can be maintained. If the dosage of polypropylene is improved, the polypropylene material with excellent flame retardancy and smoke suppression can be obtained.
Because of its quantum size effect, surface effect, interface effect, small size effect and superplasticity, nano particles can endow polypropylene with excellent physical and mechanical properties and flame retardancy. In addition to nano inorganic flame retardant, layered clay and carbon nanotubes flame retardant polypropylene materials have become the development of the front end products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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