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Hydroxide flame retardant for polypropylene (PP)
2017-11-19 14:47:07
Hydroxide flame retardant for polypropylene (PP)
According to the chemical composition, the flame retardant can be divided into inorganic flame retardant and organic flame retardant. At present, the halogen flame retardant is the highest price, but its flame retardant efficiency is high and the dosage is low, such as brominated flame retardants generally only need to fill 18% ~ 20%. Inorganic hydrate is the cheapest, but its heat absorption is less than the combustion heat of polymer materials, in order to achieve ideal flame retardant effect, it must have a larger amount of filling.
Adding polypropylene (PP) hydroxide flame retardant to polypropylene (PP) flame retardant treatment can prevent polypropylene (PP) combustion or delay the spread of fire.
The most cost-effective flame retardants are halogen containing flame retardants and Mg (OH) 2 types of polypropylene (PP) hydroxide flame retardants. Halogen containing flame retardants often emit toxic or corrosive gases when burning, and there is a certain risk. Inorganic flame retardants mainly include antimony series, aluminum series, phosphorus series, boron series and so on. The most advantages of inorganic flame retardants are low toxicity, low smoke or smoke suppression, low corrosion, and low price. At present, the research and application of new inorganic flame retardants at home and abroad are mainly magnesium hydroxide and aluminum hydroxide and five antimony oxide two, etc., especially magnesium hydroxide is the most important.
Hydroxide flame retardant magnesium hydroxide for polypropylene (PP) and preparation method thereof. In the early 80s, Japan, Israel, France, the United States and other developed countries invested more manpower and material resources to carry out in-depth research on various production methods of magnesium hydroxide, and set up factories in succession, and achieved good economic and social benefits.
Since the middle and late 80s, a number of units in China have successively studied the process of flame retardant magnesium hydroxide and aluminium hydroxide, and gradually replaced the traditional flame retardant by using them. The ideal flame retardant effect has been obtained. By the end of the twentieth Century, especially for the special use of electrical materials, fiber optic communications materials and other nano magnesium hydroxide development success, but also make the new inorganic flame retardant exclusive pincer. The flame retardancy of magnesium hydroxide is better than that of aluminum hydroxide, which is mainly reflected in the following aspects: the smoke suppression ability is much better than that of aluminum hydroxide.
Magnesium hydroxide is a green flame retardant in raw material source, preparation process, waste treatment and so on. It has wider application range than aluminum hydroxide. At the same time, magnesium hydroxide decomposition (1.37kJ/g) decomposition than aluminum hydroxide (1.17kJ/g) and high heat capacity, high 7%, which helps to improve the efficiency of flame retardant magnesium hydroxide composite; good ability with other flame retardant, flame retardant magnesium hydroxide will become the main force in the inorganic flame retardant on the market.
However, it seems that the goal of lowering prices and occupying the market has not yet reached the goal. One of the reasons lies in the lag of the development of the preparation process. The effect of the content of magnesium hydroxide flame retardant on the mechanical properties of the polymer depends strongly on the morphology of the magnesium hydroxide. At present, the technology of preparing magnesium hydroxide crystals with appropriate morphology is not mature.
Because of the different raw materials and production methods, the main economic and applicable production methods are: bitter brine lime neutralization method, brine ammonia synthesis method, magnesite method, dolomite multi-stage carbonation hydrolysis synthesis method. These methods can be used to prepare fibrous magnesium hydroxide suitable for flame retardants. The raw materials are easy to supply, low in price, simple in production technology, good in product properties, and the by-products can be recycled. The production process is basically free from pollution.
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.
Hydroxide flame retardant aluminium hydroxide for polypropylene (PP) and preparation method thereof. At present, the global aluminum hydroxide accounted for more than 80% of consumption of inorganic flame retardant, flame retardant, smoke filled, three big functions, does not have two pollution, with a variety of substances have synergistic effect, non volatile, toxic and corrosive, low price, is the flame retardant effect of aluminum hydroxide absorption in 200 DEG C.
Aluminum hydroxide, as an important inorganic flame retardant, has been the top priority in the consumption of flame retardants. Many enterprises in China have been producing and widely used in various plastics, coatings, polyurethanes, elastomers and rubber products. The size and amount of aluminum hydroxide has great influence on the flame retardant properties and material physical properties, when the particles are too thick and filled the large amount of time, will reduce the physical properties of the synthetic materials, in order to improve these deficiencies, people of aluminum hydroxide on the surface properties, particle size and other aspects of modification.
Aluminum hydroxide used as flame retardant is usually made from industrial aluminum hydroxide and refined and treated by suitable method. The aluminum hydroxide prepared by this method has a particle size of less than 5 m, which is suitable for flame retardant of polymer materials. Aluminum hydroxide for flame retardant can be directly prepared by the following methods.
(1) hydrolysis neutralization method of urea. Aluminum sulfate was added into the aluminum sulfate solution to produce aluminum sulfate solution. After purification, a proper amount of urea was added, and the aluminum hydroxide was heated and hydrolyzed to make aluminum hydroxide. The resultant precipitate is treated with surface treatment and the finished product of aluminium hydroxide flame retardant is obtained. (2) sodium aluminate method.
The sodium aluminate solution was reacted with aluminum ash at a ratio of 2 to 1 (molar ratio) to make sodium aluminate solution, and then reacted with sulfuric acid and aluminum ash to produce aluminum sulfate solution at a ratio of 1.25 to 1 at 105~120 DEG C. The mixture is neutralized to pH value is about 6.5, aluminum hydroxide precipitation, water washing, filtering, drying at 75 to 85 DEG C for 10 ~ 12h, after smashing through surface treatment can be made of aluminum hydroxide flame retardant. The synthesis of nano aluminum hydroxide has become a research hotspot in recent years. The synthesis methods are mainly liquid phase coprecipitation method and high gravity reaction precipitation method. The synthesis and application of nano flame retardants should be strengthened at present in china.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
According to the chemical composition, the flame retardant can be divided into inorganic flame retardant and organic flame retardant. At present, the halogen flame retardant is the highest price, but its flame retardant efficiency is high and the dosage is low, such as brominated flame retardants generally only need to fill 18% ~ 20%. Inorganic hydrate is the cheapest, but its heat absorption is less than the combustion heat of polymer materials, in order to achieve ideal flame retardant effect, it must have a larger amount of filling.
Adding polypropylene (PP) hydroxide flame retardant to polypropylene (PP) flame retardant treatment can prevent polypropylene (PP) combustion or delay the spread of fire.
The most cost-effective flame retardants are halogen containing flame retardants and Mg (OH) 2 types of polypropylene (PP) hydroxide flame retardants. Halogen containing flame retardants often emit toxic or corrosive gases when burning, and there is a certain risk. Inorganic flame retardants mainly include antimony series, aluminum series, phosphorus series, boron series and so on. The most advantages of inorganic flame retardants are low toxicity, low smoke or smoke suppression, low corrosion, and low price. At present, the research and application of new inorganic flame retardants at home and abroad are mainly magnesium hydroxide and aluminum hydroxide and five antimony oxide two, etc., especially magnesium hydroxide is the most important.
Hydroxide flame retardant magnesium hydroxide for polypropylene (PP) and preparation method thereof. In the early 80s, Japan, Israel, France, the United States and other developed countries invested more manpower and material resources to carry out in-depth research on various production methods of magnesium hydroxide, and set up factories in succession, and achieved good economic and social benefits.
Since the middle and late 80s, a number of units in China have successively studied the process of flame retardant magnesium hydroxide and aluminium hydroxide, and gradually replaced the traditional flame retardant by using them. The ideal flame retardant effect has been obtained. By the end of the twentieth Century, especially for the special use of electrical materials, fiber optic communications materials and other nano magnesium hydroxide development success, but also make the new inorganic flame retardant exclusive pincer. The flame retardancy of magnesium hydroxide is better than that of aluminum hydroxide, which is mainly reflected in the following aspects: the smoke suppression ability is much better than that of aluminum hydroxide.
Magnesium hydroxide is a green flame retardant in raw material source, preparation process, waste treatment and so on. It has wider application range than aluminum hydroxide. At the same time, magnesium hydroxide decomposition (1.37kJ/g) decomposition than aluminum hydroxide (1.17kJ/g) and high heat capacity, high 7%, which helps to improve the efficiency of flame retardant magnesium hydroxide composite; good ability with other flame retardant, flame retardant magnesium hydroxide will become the main force in the inorganic flame retardant on the market.
However, it seems that the goal of lowering prices and occupying the market has not yet reached the goal. One of the reasons lies in the lag of the development of the preparation process. The effect of the content of magnesium hydroxide flame retardant on the mechanical properties of the polymer depends strongly on the morphology of the magnesium hydroxide. At present, the technology of preparing magnesium hydroxide crystals with appropriate morphology is not mature.
Because of the different raw materials and production methods, the main economic and applicable production methods are: bitter brine lime neutralization method, brine ammonia synthesis method, magnesite method, dolomite multi-stage carbonation hydrolysis synthesis method. These methods can be used to prepare fibrous magnesium hydroxide suitable for flame retardants. The raw materials are easy to supply, low in price, simple in production technology, good in product properties, and the by-products can be recycled. The production process is basically free from pollution.
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.
Hydroxide flame retardant aluminium hydroxide for polypropylene (PP) and preparation method thereof. At present, the global aluminum hydroxide accounted for more than 80% of consumption of inorganic flame retardant, flame retardant, smoke filled, three big functions, does not have two pollution, with a variety of substances have synergistic effect, non volatile, toxic and corrosive, low price, is the flame retardant effect of aluminum hydroxide absorption in 200 DEG C.
Aluminum hydroxide, as an important inorganic flame retardant, has been the top priority in the consumption of flame retardants. Many enterprises in China have been producing and widely used in various plastics, coatings, polyurethanes, elastomers and rubber products. The size and amount of aluminum hydroxide has great influence on the flame retardant properties and material physical properties, when the particles are too thick and filled the large amount of time, will reduce the physical properties of the synthetic materials, in order to improve these deficiencies, people of aluminum hydroxide on the surface properties, particle size and other aspects of modification.
Aluminum hydroxide used as flame retardant is usually made from industrial aluminum hydroxide and refined and treated by suitable method. The aluminum hydroxide prepared by this method has a particle size of less than 5 m, which is suitable for flame retardant of polymer materials. Aluminum hydroxide for flame retardant can be directly prepared by the following methods.
(1) hydrolysis neutralization method of urea. Aluminum sulfate was added into the aluminum sulfate solution to produce aluminum sulfate solution. After purification, a proper amount of urea was added, and the aluminum hydroxide was heated and hydrolyzed to make aluminum hydroxide. The resultant precipitate is treated with surface treatment and the finished product of aluminium hydroxide flame retardant is obtained. (2) sodium aluminate method.
The sodium aluminate solution was reacted with aluminum ash at a ratio of 2 to 1 (molar ratio) to make sodium aluminate solution, and then reacted with sulfuric acid and aluminum ash to produce aluminum sulfate solution at a ratio of 1.25 to 1 at 105~120 DEG C. The mixture is neutralized to pH value is about 6.5, aluminum hydroxide precipitation, water washing, filtering, drying at 75 to 85 DEG C for 10 ~ 12h, after smashing through surface treatment can be made of aluminum hydroxide flame retardant. The synthesis of nano aluminum hydroxide has become a research hotspot in recent years. The synthesis methods are mainly liquid phase coprecipitation method and high gravity reaction precipitation method. The synthesis and application of nano flame retardants should be strengthened at present in china.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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