News Details
Polyurethane composite new flame retardant
2017-11-14 12:40:22
Polyurethane composite new flame retardant
Calcium aluminate is a new type of flame retardant. It has the function of smoke elimination and absorption of poison gas, and has low price. Before use, sodium stearate, zirconium aluminate metal coupling agent treatment effect will be better, adding amount of about 50 copies.
Thanks to the Sichuan University Daiyi thermoplastic elastomer polyurethane (TPU) resin as the carrier, by coating with MCA and APP composite prepared polyurethane composite flame retardant, APP content in the composite is 32%, the oxygen index is as high as 47%. The United States Patent Report on polyacetal red phosphorus, carbon forming agent, stabilizer coating, the polyurethane composite flame retardant. The composite flame retardant is then crushed or diced. Flame retardant POM was prepared by mixing the composite flame retardant with POM solid phase.
POM is a kind of macromolecule material oxygen index is only 14.9% burns easily, because of its special properties, making the development of excellent flame retardant properties of POM is very difficult. Inorganic hydroxide flame retardant, flame retardant agent only reached more than 60% will get good flame retardant effect, POM and other additives due to poor compatibility, flame retardant is added so much easy to lead to a decline in performance and processing performance of mechanics of materials.
The reaction between brine and ammonia liquor is very fast. But because of the generation of magnesium hydroxide suspension, requires a certain amount of time the crystal growth and crystal transformation, with uniform mixing with suitable stirring speed. If the time is too short, the product will be amorphous powder, and it is difficult to filter; if the time is too long, the equipment production capacity will be reduced. The control time of the experiment was 30min.
The reaction mixture ratio that brine magnesium ion with precipitant (ammonia) large ammonium ion in the molar ratio of magnesium hydroxide yield and product performance.
When the brine magnesium ion concentration, ammonia magnesium reaction theory of molar ratio of 2:1, the ammonia is volatile, so the actual ammonia magnesium molar ratio will be less than the theoretical ratio. With the increase of ammonia to magnesium ratio, the yield of magnesium hydroxide also increases. When the ratio of ammonia to magnesium was 4:1, the yield reached 88%.
Ammonia magnesium molar ratio continues to increase, the yield is not obvious changes, so continue to increase ammonia magnesium molar ratio, not only increases the cost, but also because of environmental pollution caused by ammonia volatilization. Considering comprehensively, the optimum ratio of ammonia to magnesium is 4:1.
When the ratio of ammonia to magnesium was fixed, the yield of magnesium hydroxide decreased with the increase of reaction temperature only considering the influence of initial reaction temperature on the yield of magnesium hydroxide. This is due to the increase of initial temperature and the volatilization of ammonia. Therefore, the lower initial reaction temperature is beneficial to improve the yield of magnesium hydroxide. Therefore, the optimum reaction temperature is 20.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
Wang Qi of Sichuan University 60kg ten PBDEs, 20kg three and 50kg two antimony oxide polyether thermoplastic polyurethane in the extruder, extrusion, composite cutting temperature of 170~210 DEG C. The composite flame retardant 50kg material, poly formaldehyde 80kg and antioxidant 1010, 1kg solid phase after mixing in the extruder extruder temperature 190~200, obtained flame retardant POM. The flame retardancy of the product reaches UL94 V - 2, the oxygen index is 27%, and the notched impact strength of the product reaches 6.8kJ/m2.
40kg MRP, magnesium hydroxide, melamine and 20kg 15kg thermoplastic polyurethane 30kg 10min in refining mixer 200 DEG C after mixing, grinding into pellets, the pellets are composite flame retardant 40kg and poly POM 70kg and antioxidants solid mixing, extruding and granulating in the extruder by flame retardant POM. The flame retardancy of the product reaches UL94 V - 2, and the notched impact strength of the product reaches 7.0kJ/m2.
The flame retardant of molybdenum, nitrogen, phosphorus and nitrogen mixed flame retardant system and adding inorganic hydroxide flame retardant compared not only add less and basically does not cause the decomposition of POM, and has a good application prospect in POM flame retardancy.
Although some domestic and foreign flame retardant POM material reached high standards of flame retardant, but its mechanical properties decreased seriously, composite flame retardant system although the contradiction between improved, but how to improve the flame retardant properties of POM does not reduce the mechanical properties or to reduce the mechanical properties, is still an urgent the problem.
Nitrogen series flame retardants, also known as three triazine flame retardants, are mainly melamine and its derivatives. It has multiple reaction functions, excellent stability, durability and weather resistance, no halogen, low smoke, light and heat stability, good flame retardant effect, and low price. The disadvantage is that the compound system added with nitrogen series flame retardant has poor processability and poor dispersibility of the same resin.
Nitrogen based flame retardants mainly refer to melamine and its derivatives, which can be used alone or in combination with other flame retardants. This kind of flame retardant has no halogen, low smoke, stable heat and light, high flame retardant efficiency and low price. It can be used in PA, PU, PO, PET, PS, PVC and epoxy resin. Flame retardant polyoxymethylene can be self extinguished with three triazine derivative or dicyandiamide and its derivatives.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Calcium aluminate is a new type of flame retardant. It has the function of smoke elimination and absorption of poison gas, and has low price. Before use, sodium stearate, zirconium aluminate metal coupling agent treatment effect will be better, adding amount of about 50 copies.
Thanks to the Sichuan University Daiyi thermoplastic elastomer polyurethane (TPU) resin as the carrier, by coating with MCA and APP composite prepared polyurethane composite flame retardant, APP content in the composite is 32%, the oxygen index is as high as 47%. The United States Patent Report on polyacetal red phosphorus, carbon forming agent, stabilizer coating, the polyurethane composite flame retardant. The composite flame retardant is then crushed or diced. Flame retardant POM was prepared by mixing the composite flame retardant with POM solid phase.
POM is a kind of macromolecule material oxygen index is only 14.9% burns easily, because of its special properties, making the development of excellent flame retardant properties of POM is very difficult. Inorganic hydroxide flame retardant, flame retardant agent only reached more than 60% will get good flame retardant effect, POM and other additives due to poor compatibility, flame retardant is added so much easy to lead to a decline in performance and processing performance of mechanics of materials.
The reaction between brine and ammonia liquor is very fast. But because of the generation of magnesium hydroxide suspension, requires a certain amount of time the crystal growth and crystal transformation, with uniform mixing with suitable stirring speed. If the time is too short, the product will be amorphous powder, and it is difficult to filter; if the time is too long, the equipment production capacity will be reduced. The control time of the experiment was 30min.
The reaction mixture ratio that brine magnesium ion with precipitant (ammonia) large ammonium ion in the molar ratio of magnesium hydroxide yield and product performance.
When the brine magnesium ion concentration, ammonia magnesium reaction theory of molar ratio of 2:1, the ammonia is volatile, so the actual ammonia magnesium molar ratio will be less than the theoretical ratio. With the increase of ammonia to magnesium ratio, the yield of magnesium hydroxide also increases. When the ratio of ammonia to magnesium was 4:1, the yield reached 88%.
Ammonia magnesium molar ratio continues to increase, the yield is not obvious changes, so continue to increase ammonia magnesium molar ratio, not only increases the cost, but also because of environmental pollution caused by ammonia volatilization. Considering comprehensively, the optimum ratio of ammonia to magnesium is 4:1.
When the ratio of ammonia to magnesium was fixed, the yield of magnesium hydroxide decreased with the increase of reaction temperature only considering the influence of initial reaction temperature on the yield of magnesium hydroxide. This is due to the increase of initial temperature and the volatilization of ammonia. Therefore, the lower initial reaction temperature is beneficial to improve the yield of magnesium hydroxide. Therefore, the optimum reaction temperature is 20.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
Wang Qi of Sichuan University 60kg ten PBDEs, 20kg three and 50kg two antimony oxide polyether thermoplastic polyurethane in the extruder, extrusion, composite cutting temperature of 170~210 DEG C. The composite flame retardant 50kg material, poly formaldehyde 80kg and antioxidant 1010, 1kg solid phase after mixing in the extruder extruder temperature 190~200, obtained flame retardant POM. The flame retardancy of the product reaches UL94 V - 2, the oxygen index is 27%, and the notched impact strength of the product reaches 6.8kJ/m2.
40kg MRP, magnesium hydroxide, melamine and 20kg 15kg thermoplastic polyurethane 30kg 10min in refining mixer 200 DEG C after mixing, grinding into pellets, the pellets are composite flame retardant 40kg and poly POM 70kg and antioxidants solid mixing, extruding and granulating in the extruder by flame retardant POM. The flame retardancy of the product reaches UL94 V - 2, and the notched impact strength of the product reaches 7.0kJ/m2.
The flame retardant of molybdenum, nitrogen, phosphorus and nitrogen mixed flame retardant system and adding inorganic hydroxide flame retardant compared not only add less and basically does not cause the decomposition of POM, and has a good application prospect in POM flame retardancy.
Although some domestic and foreign flame retardant POM material reached high standards of flame retardant, but its mechanical properties decreased seriously, composite flame retardant system although the contradiction between improved, but how to improve the flame retardant properties of POM does not reduce the mechanical properties or to reduce the mechanical properties, is still an urgent the problem.
Nitrogen series flame retardants, also known as three triazine flame retardants, are mainly melamine and its derivatives. It has multiple reaction functions, excellent stability, durability and weather resistance, no halogen, low smoke, light and heat stability, good flame retardant effect, and low price. The disadvantage is that the compound system added with nitrogen series flame retardant has poor processability and poor dispersibility of the same resin.
Nitrogen based flame retardants mainly refer to melamine and its derivatives, which can be used alone or in combination with other flame retardants. This kind of flame retardant has no halogen, low smoke, stable heat and light, high flame retardant efficiency and low price. It can be used in PA, PU, PO, PET, PS, PVC and epoxy resin. Flame retardant polyoxymethylene can be self extinguished with three triazine derivative or dicyandiamide and its derivatives.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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