Application Analysis of Flame Retardant in the Field of Plastic Products
Flame retardant is a widely used chemical additives, and flame retardants are usually used to flame retardant dependent combustibles, in all aspects of our lives can be used, the future development prospects are very huge.
flame retardantIs a widely used chemical additives, and flame retardants are usually used in flame retardant dependent combustibles, in all aspects of our lives can be used, the future development prospects are very huge.
1. Brominated flame retardants
Most brominated flame retardants decompose at 200-300°C. This temperature range is also the decomposition temperature range of polypropylene, and therefore, when polypropylene is thermally decomposed, the brominated flame retardant also begins to decompose and capture free radicals generated by its degradation reaction, thereby delaying or terminating the chain reaction of combustion. At the same time, the released HBr is also a kind of flame retardant gas, which has a very high density and covers the surface of the material, plays the role of blocking the combustible gas on the surface, and can also inhibit the combustion of the material.
The main disadvantage of brominated flame retardants is that they reduce the UV stability of the flame retardant substrate and generate more smoke, corrosive gases and toxic gases during the combustion process, thereby limiting their use.
2, phosphorus-nitrogen flame retardant.
Phosphorus-nitrogen flame retardants are also called intumescent flame retardants. When the polymer containing this flame retardant is heated, a uniform carbonaceous foam layer will be formed on the surface, which can play the role of heat insulation, oxygen insulation and smoke suppression. It can also prevent the formation of molten droplets, so it has good flame retardant properties. Intumescent flame retardant system usually consists of three parts: acid source (dehydrating agent), carbon source (carbon forming agent) and gas source (nitrogen source, foaming source). Intumescent flame retardants act as flame retardants in the condensed phase, mainly by forming a porous carbon foam layer. Phosphorus-nitrogen flame retardants also have the advantages of halogen-free, low smoke and low toxicity.
3. Phosphorus flame retardant
The phosphorus-based flame retardant plays a flame retardant role in promoting dehydration during the initial decomposition of the polymer to form carbonization. The dehydration and carbonization step must depend on the oxygen-containing groups of the high polymer itself, and the flame retardant effect of the high polymer which already has oxygen-containing groups will be better. However, there is no oxygen-containing group in the molecular structure of polypropylene, so the flame retardant effect of using phosphorus flame retardant alone is not good, but it can produce synergistic effect with AI (OH) 3 and Mg(OH)2, so as to obtain good flame retardant performance.
Real-time information
Zhongke Flame Retardant Organization Watches 20 Closing Ceremonies
On the morning of October 22, 2022, members of Zhongke Flame Retardant New Materials Co., Ltd. watched the closing ceremony of the 20th Congress under the leadership of General Manager Wang Ligui.
Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.
As a flame retardant, magnesium hydroxide also need to improve what aspects?
When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.
Hefei Zhongke Flame Retardant New Material Co., Ltd
Sales Department Telephone:15905609730
Ministry of Foreign Trade Telephone:13956052398
Comprehensive department Telephone:0551-67712199
Company headquarters address: Hefei Feidong Economic Development Zone Xianghe Road 36
E-mail:hefei@zkxcl.com
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