News Details
Flame retardants for Polypropylene
2017-12-1 10:50:18
Flame retardants for Polypropylene
Melamine cyanuric acid is a non - enhanced polypropylene flame retardant with the same dosage as organic phosphonate. But the performance can reach V2 in polypropylene, because the temperature exceeds 275 C (melting range higher than PA6 PA 45 C) will begin to degrade. But the electrical performance is good, and the components can be made in any color. Therefore, if the application for flame retardancy is not high, this is a cost-effective solution.
With the red phosphorus flame retardant polypropylene only 7%, can be effective flame retardant. The flame retardant of polypropylene is a kind of combustible powder, so the flame retardant masterbatch is usually used first. The mechanical and electrical properties of the finished product are good, but attention should be paid to the release of hydrogen phosphine in the process of processing, and the corrosion of copper wire sometimes occurs in the hot and humid environment. In addition, due to the limitation of the red color itself, the color of the finished product is also limited in red, brown and black / grey.
The research report shows that the three oxidized and two antimony synergistic brominated polystyrene is a very outstanding solution: the components have good mechanical properties, high ignition temperature and high burn point, and can be coloured. But the electrical performance is not the best, in addition to the unit weight of the components of the application, the density of the additive system is not the advantage. Generally, the density of 30% glass fiber reinforced polypropylene is about 1.35 g/cm3, such as Br/AtO containing flame retardant, which is not close to 1.70 g/cm3. The demand for the shape of consumer electronics is higher than that of industrial electronic and electrical equipment. Halogen flame retardants are an obvious disadvantage.
The content of the organic phosphonate additive with the synergistic nitrogen system is low, and the electrical and mechanical properties of the components are high and can be coloured. The density of the 30% glass reinforced PA with this flame retardant system is usually around 1.46g/cm3. Compared to the compound containing brominated polystyrene / three oxidation of antimony, the total weight of the material needed to make injection components by phosphonate is less than 14%.
In the past few years, the thermal stability of polypropylene compounds has been found to be limited by nitrogen synergist. So a lot of work has been done on the development of systems with different synergies. A suitable phosphor based flame retardant has been put into commercial production.
The characteristic of phosphonium phosphonate - phosphorus synergism is the improvement of processing stability. DSC data show that the processing window than the P-N system, and the system wide red phosphorus bromide.
The conical calorimeter test showed that the heat release rate curve of the new phosphorus - phosphorus (P-P) system was similar to that of phosphorus - nitrogen (P-N). The flammability grade and the performance of hot wire are also similar. For example, using Exolit OP1400 and other systems, the V0 level can reach a thickness of 0.4mm.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Appearance: Colorless Viscous Liquid
Melting Point: -64 ℃
Boiling Point: 315 ℃
Density: 1.512
Flash Point: 249 ℃
Refractive Index: N20 / D 1.503
Specific Gravity 1.490-1.510
Chlorine Content Of 49.5% ± 0.5
Color Value Max 100
Water Content 0.10% Max
Viscosity (25 ° C) 1500-1800 CPS
Acidity (Mg KOH / G 0.10 Max
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
The relative creepage index (CTI) of Exolit OP 1400 is excellent in isoelectric performance, so it is especially suitable for polypropylene, such as connectors, circuit breakers and switches. It improves the processing stability and no frost spray, and the influence on the mechanical properties of compounds can be neglected. The PA GF30 complex P-P flame retardant system of hydrogen cyanide (HCN) less, so the smoke toxicity index is far lower than that of using P-N flame retardant. The smoke density is also low, so the system is suitable for railway and other traffic applications. The glass fiber reinforced polypropylene with Exolit OP 1400, with high LOI and low smoke density and low toxicity, can reach the highest safety level of EN 45545 HL 3.
The processing temperature of flame retardant polypropylene polypropylene usually requires up to 300 degrees C, but also has high temperature processing temperature can reach 340 DEG C. In the process of modification, if the thermal stability of the additive is insufficient, the degradation of polymer, the formation of decomposition products and the discoloration of the products are possible. The differential scanning calorimeter (DSC) analysis showed that the phosphoric acid - containing phosphonate - containing flame retardants enhanced the processing window of the PA complex higher than all the other flame retardant PA.
Many modified plants have begun to produce products containing Exolit OP 1400. Over the past 10 years, halogen-free combustion improver has made great progress, making PA6 and PA the main electrical and electronic components production materials, meeting the safety regulations and adapting to the trend of important electronic and electrical equipment, especially thin-walled. It is also able to maintain the position of the polypropylene polymer as the most cost-effective flame retardant composite. Exolit 1400 will help the development of electronic and electrical equipment industry.
Magnesium hydroxide is a fast developing additive flame retardant, which is low smoke, non-toxic, neutralizing acid and corrosive gases in combustion process. Therefore, it is an environment-friendly green flame retardant. The flame retardancy mechanism is similar to that of ATH. Compared with ATH, the decomposition temperature of Mg (OH) is higher than that of ATH, 1O0 - 150 C, which can be used for flame retardance of engineering plastics with temperatures above 250 C, and also promotes the formation of polymers. But to achieve a certain flame retardant effect, the amount of addition needs to be above 50%, which has a great influence on the properties of the materials. In order to reduce the amount of Mg (OH) 2 in polymer, one way is to make Mg (OH) 2 particles fine. Another way is to modify the surface of Mg (OH) by coating technology, so as to improve its compatibility with polymers.
Magnesium hydroxide has the advantages of low smoke concentration, and its electrical properties are also good, and the components can be coloured. But the high amount of addition will also cause problems in the processing, mechanical properties and component density.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Melamine cyanuric acid is a non - enhanced polypropylene flame retardant with the same dosage as organic phosphonate. But the performance can reach V2 in polypropylene, because the temperature exceeds 275 C (melting range higher than PA6 PA 45 C) will begin to degrade. But the electrical performance is good, and the components can be made in any color. Therefore, if the application for flame retardancy is not high, this is a cost-effective solution.
With the red phosphorus flame retardant polypropylene only 7%, can be effective flame retardant. The flame retardant of polypropylene is a kind of combustible powder, so the flame retardant masterbatch is usually used first. The mechanical and electrical properties of the finished product are good, but attention should be paid to the release of hydrogen phosphine in the process of processing, and the corrosion of copper wire sometimes occurs in the hot and humid environment. In addition, due to the limitation of the red color itself, the color of the finished product is also limited in red, brown and black / grey.
The research report shows that the three oxidized and two antimony synergistic brominated polystyrene is a very outstanding solution: the components have good mechanical properties, high ignition temperature and high burn point, and can be coloured. But the electrical performance is not the best, in addition to the unit weight of the components of the application, the density of the additive system is not the advantage. Generally, the density of 30% glass fiber reinforced polypropylene is about 1.35 g/cm3, such as Br/AtO containing flame retardant, which is not close to 1.70 g/cm3. The demand for the shape of consumer electronics is higher than that of industrial electronic and electrical equipment. Halogen flame retardants are an obvious disadvantage.
The content of the organic phosphonate additive with the synergistic nitrogen system is low, and the electrical and mechanical properties of the components are high and can be coloured. The density of the 30% glass reinforced PA with this flame retardant system is usually around 1.46g/cm3. Compared to the compound containing brominated polystyrene / three oxidation of antimony, the total weight of the material needed to make injection components by phosphonate is less than 14%.
In the past few years, the thermal stability of polypropylene compounds has been found to be limited by nitrogen synergist. So a lot of work has been done on the development of systems with different synergies. A suitable phosphor based flame retardant has been put into commercial production.
The characteristic of phosphonium phosphonate - phosphorus synergism is the improvement of processing stability. DSC data show that the processing window than the P-N system, and the system wide red phosphorus bromide.
The conical calorimeter test showed that the heat release rate curve of the new phosphorus - phosphorus (P-P) system was similar to that of phosphorus - nitrogen (P-N). The flammability grade and the performance of hot wire are also similar. For example, using Exolit OP1400 and other systems, the V0 level can reach a thickness of 0.4mm.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Appearance: Colorless Viscous Liquid
Melting Point: -64 ℃
Boiling Point: 315 ℃
Density: 1.512
Flash Point: 249 ℃
Refractive Index: N20 / D 1.503
Specific Gravity 1.490-1.510
Chlorine Content Of 49.5% ± 0.5
Color Value Max 100
Water Content 0.10% Max
Viscosity (25 ° C) 1500-1800 CPS
Acidity (Mg KOH / G 0.10 Max
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
The relative creepage index (CTI) of Exolit OP 1400 is excellent in isoelectric performance, so it is especially suitable for polypropylene, such as connectors, circuit breakers and switches. It improves the processing stability and no frost spray, and the influence on the mechanical properties of compounds can be neglected. The PA GF30 complex P-P flame retardant system of hydrogen cyanide (HCN) less, so the smoke toxicity index is far lower than that of using P-N flame retardant. The smoke density is also low, so the system is suitable for railway and other traffic applications. The glass fiber reinforced polypropylene with Exolit OP 1400, with high LOI and low smoke density and low toxicity, can reach the highest safety level of EN 45545 HL 3.
The processing temperature of flame retardant polypropylene polypropylene usually requires up to 300 degrees C, but also has high temperature processing temperature can reach 340 DEG C. In the process of modification, if the thermal stability of the additive is insufficient, the degradation of polymer, the formation of decomposition products and the discoloration of the products are possible. The differential scanning calorimeter (DSC) analysis showed that the phosphoric acid - containing phosphonate - containing flame retardants enhanced the processing window of the PA complex higher than all the other flame retardant PA.
Many modified plants have begun to produce products containing Exolit OP 1400. Over the past 10 years, halogen-free combustion improver has made great progress, making PA6 and PA the main electrical and electronic components production materials, meeting the safety regulations and adapting to the trend of important electronic and electrical equipment, especially thin-walled. It is also able to maintain the position of the polypropylene polymer as the most cost-effective flame retardant composite. Exolit 1400 will help the development of electronic and electrical equipment industry.
Magnesium hydroxide is a fast developing additive flame retardant, which is low smoke, non-toxic, neutralizing acid and corrosive gases in combustion process. Therefore, it is an environment-friendly green flame retardant. The flame retardancy mechanism is similar to that of ATH. Compared with ATH, the decomposition temperature of Mg (OH) is higher than that of ATH, 1O0 - 150 C, which can be used for flame retardance of engineering plastics with temperatures above 250 C, and also promotes the formation of polymers. But to achieve a certain flame retardant effect, the amount of addition needs to be above 50%, which has a great influence on the properties of the materials. In order to reduce the amount of Mg (OH) 2 in polymer, one way is to make Mg (OH) 2 particles fine. Another way is to modify the surface of Mg (OH) by coating technology, so as to improve its compatibility with polymers.
Magnesium hydroxide has the advantages of low smoke concentration, and its electrical properties are also good, and the components can be coloured. But the high amount of addition will also cause problems in the processing, mechanical properties and component density.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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