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Inorganic flame retardant of polyolefin
2017-11-18 11:26:50
Inorganic flame retardant of polyolefin
Belong to the red phosphorus inorganic flame retardant polyolefin, polyolefin is inorganic flame retardant in one of the most widely used and most studied flame retardant.
Wu studied the mechanism of the flame retardant, red phosphorus that can at relatively low concentration so that most of the polymer has good flame retardant performance, process stability, and did not affect the physical performance of the matrix. It can not only produce free radical flame retardant in gas phase, but also form foam flame retardant in the condensed phase. But it is easy to produce toxic gas phosphine (PH3), dust is easy to explode, and it is difficult to disperse in the polymer, which limits the application of the flame retardant additives. The red phosphorus by physical or chemical methods are improved, such as the "packaging" red phosphorus particles, namely microencapsulation, the defects remedied.
Boron compounds are commonly used as inorganic flame retardants for polyolefins, and zinc borate products are the main ones.
The flame retardant additive obviously improves the fire resistance of the product, has excellent flame retardant, smoke suppression and arc extinguishing performance, and can make the products emit less poisonous and harmful smoke when burning. The main mechanism of flame retardant is heat absorption and dilution, as well as the formation of heat insulation layer. Zinc borate can lose crystallization water when it is higher than 300 degrees, and it can absorb heat and cool down.
Zinc borate zinc in about 38% by Zinc Oxide or zinc hydroxide form into the gas phase, the dilution of the combustible gas, the burning rate is reduced, further increase the flame retardancy. Common zinc borate flame retardant additives and halogen compounds. In the combustion process, the fuel surface will cover a number of volatile zinc compounds and boric acid, to isolate the air. This coating can inhibit the occurrence of flammable gas and also prevent oxidation and heat. The presence of zinc is beneficial to dehydration reaction. In addition, the presence of boric acid can promote the formation of large amounts of carbon, and the increase of carbon is also beneficial to reduce the escape of combustible matter, and has a good smoke suppression effect.
Three oxidation of two antimony, five oxidation of two antimony and antimony sodium are the main products of antimony series flame retardant additives, which is widely used in three oxide two antimony agent, mainly used for plastic products and textile flame retardant, also can be used as rubber, wood flame retardant additives.
The flame retardant mechanism is generally believed that: (1) to cover the antimony oxide on the surface of a liquid or solid state combustion, plays the role of isolated air; (2) because of antimony oxide melting and evaporation to absorb heat and reduce the combustion temperature; (3) for antimony oxide vapor after the formation of a variety of antimonides and halogen radicals in the flame, the decomposition products can dissipate flame energy and chemical change of combustion process, so as to inhibit.
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 resulting polymer in the burning of many high energy free radicals, intumescent flame retardant additives which can capture the free radicals in the decomposition process (e.g., PO?), to cut off the free radical chain reaction to achieve the purpose of flame retarding.
With the increasing application of polymer materials and the increasing demand for environmental protection, more and more requirements for the flame retardancy of materials are put forward. In order to meet the requirements of flame retardant synthetic materials better, improve the use of flame retardant additives and the effect of the field, in the future should focus on the following aspects: Aiming at some traditional flame retardant additives, flame retardant properties due to the existence of certain deficiencies, should be engaged in the study of this kind of flame retardant additives "repair" of the. Such as polyolefin inorganic flame retardant surface modification, nano technology and so on.
The synergistic flame retardant mechanism of polyolefin inorganic flame retardant was explored. Single polyolefin inorganic flame retardant may not have good flame retardant effect, but it will be more ideal if it is combined with other flame retardant additives.
Study on environmentally friendly flame retardant additives. With the development of modern science and technology and the enhancement of environmental protection consciousness, environmental friendly flame retardant additives will be paid more and more attention. Developing environment-friendly flame retardant additives will be the key research direction in the future.
A new composite flame retardant additive for flame retardant materials from condensed phase, gas phase and liquid phase is developed. It is also an important direction for the development of flame retardant additives in the future.
Magnesium hydroxide dehydration occurs in a higher temperature range, so it can be applied to flame retardant high temperature decomposition polymer, and its application range is wider than ATH.
No encapsulated red phosphorus hygroscopicity, antioxidant properties of red phosphorus flame retardant was significantly better than the microcapsule coated by TG; TGA spectra showed that the microencapsulated red phosphorus fire up to 470 DEG C, the microencapsulated red phosphorus flame retardant, spherical particles.
When the microencapsulated red phosphorus compound: pentaerythritol melamine as: 0.75: 4: 2 (molar ratio), intumescent flame retardant has excellent flame retardant properties. The Microencapsulated Red Phosphorus / pentaerythritol / melamine composed intumescent flame retardant at high temperature to form P - N bond, P N has a synergistic effect. Adding 30% intumescent flame retardant, epoxy resin OI has never been increased to 26.3% by 19%.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Belong to the red phosphorus inorganic flame retardant polyolefin, polyolefin is inorganic flame retardant in one of the most widely used and most studied flame retardant.
Wu studied the mechanism of the flame retardant, red phosphorus that can at relatively low concentration so that most of the polymer has good flame retardant performance, process stability, and did not affect the physical performance of the matrix. It can not only produce free radical flame retardant in gas phase, but also form foam flame retardant in the condensed phase. But it is easy to produce toxic gas phosphine (PH3), dust is easy to explode, and it is difficult to disperse in the polymer, which limits the application of the flame retardant additives. The red phosphorus by physical or chemical methods are improved, such as the "packaging" red phosphorus particles, namely microencapsulation, the defects remedied.
Boron compounds are commonly used as inorganic flame retardants for polyolefins, and zinc borate products are the main ones.
The flame retardant additive obviously improves the fire resistance of the product, has excellent flame retardant, smoke suppression and arc extinguishing performance, and can make the products emit less poisonous and harmful smoke when burning. The main mechanism of flame retardant is heat absorption and dilution, as well as the formation of heat insulation layer. Zinc borate can lose crystallization water when it is higher than 300 degrees, and it can absorb heat and cool down.
Zinc borate zinc in about 38% by Zinc Oxide or zinc hydroxide form into the gas phase, the dilution of the combustible gas, the burning rate is reduced, further increase the flame retardancy. Common zinc borate flame retardant additives and halogen compounds. In the combustion process, the fuel surface will cover a number of volatile zinc compounds and boric acid, to isolate the air. This coating can inhibit the occurrence of flammable gas and also prevent oxidation and heat. The presence of zinc is beneficial to dehydration reaction. In addition, the presence of boric acid can promote the formation of large amounts of carbon, and the increase of carbon is also beneficial to reduce the escape of combustible matter, and has a good smoke suppression effect.
Three oxidation of two antimony, five oxidation of two antimony and antimony sodium are the main products of antimony series flame retardant additives, which is widely used in three oxide two antimony agent, mainly used for plastic products and textile flame retardant, also can be used as rubber, wood flame retardant additives.
The flame retardant mechanism is generally believed that: (1) to cover the antimony oxide on the surface of a liquid or solid state combustion, plays the role of isolated air; (2) because of antimony oxide melting and evaporation to absorb heat and reduce the combustion temperature; (3) for antimony oxide vapor after the formation of a variety of antimonides and halogen radicals in the flame, the decomposition products can dissipate flame energy and chemical change of combustion process, so as to inhibit.
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 resulting polymer in the burning of many high energy free radicals, intumescent flame retardant additives which can capture the free radicals in the decomposition process (e.g., PO?), to cut off the free radical chain reaction to achieve the purpose of flame retarding.
With the increasing application of polymer materials and the increasing demand for environmental protection, more and more requirements for the flame retardancy of materials are put forward. In order to meet the requirements of flame retardant synthetic materials better, improve the use of flame retardant additives and the effect of the field, in the future should focus on the following aspects: Aiming at some traditional flame retardant additives, flame retardant properties due to the existence of certain deficiencies, should be engaged in the study of this kind of flame retardant additives "repair" of the. Such as polyolefin inorganic flame retardant surface modification, nano technology and so on.
The synergistic flame retardant mechanism of polyolefin inorganic flame retardant was explored. Single polyolefin inorganic flame retardant may not have good flame retardant effect, but it will be more ideal if it is combined with other flame retardant additives.
Study on environmentally friendly flame retardant additives. With the development of modern science and technology and the enhancement of environmental protection consciousness, environmental friendly flame retardant additives will be paid more and more attention. Developing environment-friendly flame retardant additives will be the key research direction in the future.
A new composite flame retardant additive for flame retardant materials from condensed phase, gas phase and liquid phase is developed. It is also an important direction for the development of flame retardant additives in the future.
Magnesium hydroxide dehydration occurs in a higher temperature range, so it can be applied to flame retardant high temperature decomposition polymer, and its application range is wider than ATH.
No encapsulated red phosphorus hygroscopicity, antioxidant properties of red phosphorus flame retardant was significantly better than the microcapsule coated by TG; TGA spectra showed that the microencapsulated red phosphorus fire up to 470 DEG C, the microencapsulated red phosphorus flame retardant, spherical particles.
When the microencapsulated red phosphorus compound: pentaerythritol melamine as: 0.75: 4: 2 (molar ratio), intumescent flame retardant has excellent flame retardant properties. The Microencapsulated Red Phosphorus / pentaerythritol / melamine composed intumescent flame retardant at high temperature to form P - N bond, P N has a synergistic effect. Adding 30% intumescent flame retardant, epoxy resin OI has never been increased to 26.3% by 19%.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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