What is the mechanism of action of plastic flame retardants?
What is the flame retardant mechanism of plastic flame retardants? 1, produce a gas that can smoothen the flame. For example, antimony trioxide, which reacts with HCL produced by combustion in PVC to produce a smothering gas, that is, antimony nitrogen oxide, which has the effect of flame retardant.
Plasticflame retardantWhat is the flame retardant mechanism?
1, produce a gas that can smother out the flame. For example, antimony trioxide, which reacts with HCL produced by combustion in PVC to produce a smothering gas, that is, antimony nitrogen oxide, which has the effect of flame retardant.
2. Absorb the heat generated during combustion, cool down and slow down the combustion rate. For example, aluminum hydroxide, the proportion of chemically bound water contained in its molecules is as high as 34%. This bound water remains stable at the processing temperature of most plastics, but it begins to decompose when it exceeds 200°C, releasing water vapor. And each decomposition of a gram of aluminum hydroxide, to absorb 36 kilocalories of heat.
3. Provide a layer of isolation layer isolated from oxygen, which is self-extinguishing due to the isolation of oxygen. For example, the phosphorus compound generated during the combustion of phosphate flame retardant is the isolation layer of oxygen.
Generate free radicals that can react with plastics, and their reaction products with plastics can play a flame retardant role.
Also known as flame retardant, fire retardant or fire retardant: a functional additive that imparts flame retardancy to flammable polymers; it is divided into additive flame retardants and reactive flame retardants according to the application method. Depending on the composition, additive flame retardants mainly include inorganic flame retardants, halogen-based flame retardants (organic chlorides and organic bromides), phosphorus-based flame retardants (red phosphorus, phosphate esters, halogenated phosphate esters, and the like), nitrogen-based flame retardants, and the like. Most of the reactive flame retardants are monomers of organic halogen and organic phosphorus containing reactive functional groups. In addition, molybdenum compounds, tin compounds, iron compounds and the like having a smoke-suppressing effect are also included in the category of flame retardants. It is mainly suitable for plastics with flame retardant requirements, delaying or preventing the combustion of plastics, especially polymer plastics. Make it ignite time growth, ignite self-extinguishing, difficult to ignite.
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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
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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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