News Details
New flame retardant
2017-9-18 17:41:02
New flame retardant
Calcium aluminate is a new flame retardant. Besides the flame retardant, it also has the effect of eliminating smoke and absorbing gas, and the price is low. With the use of sodium stearate before use, the effect of metal coupling agent of zirconium aluminate is better, with a quantity of about 50.
Sichuan university x generation of the righteous with thermoplastic polyurethane elastomer (TPU) as the carrier resin, through the coating technology and MCA and APP compound polyurethane matrix composite was made by the new flame retardant, APP content in the composite material was 32%, the oxygen index up to 47%. The American patent report used polyacetal to wrap the red phosphorus, carbon and stabilizer, and make it into a composite flame retardant to crush or cut the composite flame retardant. Then the flame retardant POM was prepared by mixing the composite flame retardant with POM solid.
POM is an oxygen index only 14.9% of highly flammable polymer materials, due to its special properties, it is very difficult to develop a good flame-retardant POM. Inorganic hydroxide flame retardant, flame retardant agent only reaches more than 60% will get good flame retardant effect, because POM has bad compatibility with other additives, add so much fire retardant easily led to the decrease of the material mechanical properties and processability.
The brine reacts quickly with ammonia. However, due to the formation of magnesium hydroxide suspension, the crystal growth of crystal is needed for a certain amount of time, and it should be mixed with appropriate stirring speed. If the time is too short, the product will be in amorphous powder, not easy to filter; If the time is too long, the equipment production ability decreases. The control time of this experiment is 30min.
The composition of the reaction is much more important than that of the ammonium ions in the brine and the ammonium in the precipitation agent (ammonia).
Cresyl Diphenyl Phosphate(CDP) Use
This Product Is Flame Retardant Plasticizer, And Resin Compatibility, For Polyvinyl Acetal, Nitrocellulose, Polyvinyl Chloride, Natural Rubber And Synthetic Rubber; Can Also Be Used For Synthetic Lubricants And Hydraulic Oil; Substitutes For Triphenyl Phosphate. Applicable To Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Acetal, Nitrocellulose, Ethyl Cellulose, Cellulose Acetate Butyrate And So On.
When the concentration of magnesium ion in brine is certain, the content of ammonia magnesium reaction is 2:1. Since ammonia is highly volatile, the actual amount of ammonia magnesium is higher than the theoretical ratio. The yield of magnesium hydroxide increases with the increase of the amount of ammonia magnesium. When the amount of ammonia magnesium is 4:1, the yield is 88%.
The volume ratio of ammonia magnesium is increasing, the yield change is not obvious, so it is not only increasing the cost, but also the environmental pollution caused by the evaporation of ammonia. The optimal amount of ammonia magnesium is determined by a ratio of 4:1.
The yield rate decreases with the reaction temperature increasing when the ratio of the amount of fixed ammonia magnesium is considered, and the effect of the initial temperature on the yield of magnesium hydroxide is considered. This is because the initial temperature increases, and the evaporation of ammonia increases. Therefore, the lower initial reaction temperature is favorable for improving the yield of magnesium hydroxide. So the initial temperature is 20.
Sichuan university britain-based authority such as ten bromine biphenyl ether will be 60 kg, 20 kg antimony trioxide and 50 kg polyether thermoplastic polyurethane, the temperature of 170 ~ 210 ℃ in the extruder composite extrusion, cut grain. The above composite flame retardant aggregate 50 kg, polyformaldehyde 80 kg and antioxidant 80, 1 kg of solid phase blend, the temperature of 190 ~ 200 ℃ in the extruder extrusion granulation, flame retardant POM. The flame retardant performance of the product is ul994 V - 2, oxygen index is 27%, and the material notch impact strength is 6.8 kJ/m2.
To 40 kg of microcapsule red phosphorus 15 kg, 20 kg magnesium hydroxide, melamine and thermoplastic polyurethane 30 kg mixer mixing in the 200 ℃ after 10 min, crushed into aggregate, then the composite flame retardant aggregate 40 kg and 70 kg homopolymerization POM after mixed with proper amount of antioxidant solid-phase in extruder extrusion granulation, flame retardant POM. The flame retardant performance of this product reaches UL94 V - 2, and the material notch impact strength is 7.0 kJ/m2.
And molybdenum, nitrogen and phosphorus - nitrogen mixture flame retardant system of flame retardant additives compared with inorganic hydroxide flame retardants not only add quantity is little, and basically does not cause POM decomposition, in the aspect of POM flame retardant have good application prospect.
Although part of the flame retardant POM material at home and abroad reached a high standard of flame retardant, but its mechanical performance degradation is serious, the emergence of the composite flame retardant system although make contradiction of the two improved, but how to improve the flame retardant performance of POM and not reduce its mechanical performance or reduce its mechanical properties, is still a problem to be solved.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Calcium aluminate is a new flame retardant. Besides the flame retardant, it also has the effect of eliminating smoke and absorbing gas, and the price is low. With the use of sodium stearate before use, the effect of metal coupling agent of zirconium aluminate is better, with a quantity of about 50.
Sichuan university x generation of the righteous with thermoplastic polyurethane elastomer (TPU) as the carrier resin, through the coating technology and MCA and APP compound polyurethane matrix composite was made by the new flame retardant, APP content in the composite material was 32%, the oxygen index up to 47%. The American patent report used polyacetal to wrap the red phosphorus, carbon and stabilizer, and make it into a composite flame retardant to crush or cut the composite flame retardant. Then the flame retardant POM was prepared by mixing the composite flame retardant with POM solid.
POM is an oxygen index only 14.9% of highly flammable polymer materials, due to its special properties, it is very difficult to develop a good flame-retardant POM. Inorganic hydroxide flame retardant, flame retardant agent only reaches more than 60% will get good flame retardant effect, because POM has bad compatibility with other additives, add so much fire retardant easily led to the decrease of the material mechanical properties and processability.
The brine reacts quickly with ammonia. However, due to the formation of magnesium hydroxide suspension, the crystal growth of crystal is needed for a certain amount of time, and it should be mixed with appropriate stirring speed. If the time is too short, the product will be in amorphous powder, not easy to filter; If the time is too long, the equipment production ability decreases. The control time of this experiment is 30min.
The composition of the reaction is much more important than that of the ammonium ions in the brine and the ammonium in the precipitation agent (ammonia).
Cresyl Diphenyl Phosphate(CDP) Use
This Product Is Flame Retardant Plasticizer, And Resin Compatibility, For Polyvinyl Acetal, Nitrocellulose, Polyvinyl Chloride, Natural Rubber And Synthetic Rubber; Can Also Be Used For Synthetic Lubricants And Hydraulic Oil; Substitutes For Triphenyl Phosphate. Applicable To Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Acetal, Nitrocellulose, Ethyl Cellulose, Cellulose Acetate Butyrate And So On.
When the concentration of magnesium ion in brine is certain, the content of ammonia magnesium reaction is 2:1. Since ammonia is highly volatile, the actual amount of ammonia magnesium is higher than the theoretical ratio. The yield of magnesium hydroxide increases with the increase of the amount of ammonia magnesium. When the amount of ammonia magnesium is 4:1, the yield is 88%.
The volume ratio of ammonia magnesium is increasing, the yield change is not obvious, so it is not only increasing the cost, but also the environmental pollution caused by the evaporation of ammonia. The optimal amount of ammonia magnesium is determined by a ratio of 4:1.
The yield rate decreases with the reaction temperature increasing when the ratio of the amount of fixed ammonia magnesium is considered, and the effect of the initial temperature on the yield of magnesium hydroxide is considered. This is because the initial temperature increases, and the evaporation of ammonia increases. Therefore, the lower initial reaction temperature is favorable for improving the yield of magnesium hydroxide. So the initial temperature is 20.
Sichuan university britain-based authority such as ten bromine biphenyl ether will be 60 kg, 20 kg antimony trioxide and 50 kg polyether thermoplastic polyurethane, the temperature of 170 ~ 210 ℃ in the extruder composite extrusion, cut grain. The above composite flame retardant aggregate 50 kg, polyformaldehyde 80 kg and antioxidant 80, 1 kg of solid phase blend, the temperature of 190 ~ 200 ℃ in the extruder extrusion granulation, flame retardant POM. The flame retardant performance of the product is ul994 V - 2, oxygen index is 27%, and the material notch impact strength is 6.8 kJ/m2.
To 40 kg of microcapsule red phosphorus 15 kg, 20 kg magnesium hydroxide, melamine and thermoplastic polyurethane 30 kg mixer mixing in the 200 ℃ after 10 min, crushed into aggregate, then the composite flame retardant aggregate 40 kg and 70 kg homopolymerization POM after mixed with proper amount of antioxidant solid-phase in extruder extrusion granulation, flame retardant POM. The flame retardant performance of this product reaches UL94 V - 2, and the material notch impact strength is 7.0 kJ/m2.
And molybdenum, nitrogen and phosphorus - nitrogen mixture flame retardant system of flame retardant additives compared with inorganic hydroxide flame retardants not only add quantity is little, and basically does not cause POM decomposition, in the aspect of POM flame retardant have good application prospect.
Although part of the flame retardant POM material at home and abroad reached a high standard of flame retardant, but its mechanical performance degradation is serious, the emergence of the composite flame retardant system although make contradiction of the two improved, but how to improve the flame retardant performance of POM and not reduce its mechanical performance or reduce its mechanical properties, is still a problem to be solved.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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