What are the three commonly used PP plastic flame retardants
Flame retardant is the application of flame retardant technology in real life. It is a special chemical additive used to improve the combustion performance of combustible and flammable materials, and is widely used in the flame retardant processing of various decoration materials. After the flame retardant processing of the material, in the external fire attack, can effectively prevent, delay or terminate the spread of the flame, so as to achieve the role of flame retardant. 1. Most brominated flame retardants decompose at 200-300 ℃. This temperature range is also the decomposition temperature range of polypropylene. Therefore, when polypropylene is decomposed by heat, brominated flame retardants also begin to decompose and can capture its degradation.
flame retardantIt is the application of flame retardant technology in real life. It is a special chemical additive used to improve the combustion performance of combustible and flammable materials. It is widely used in the flame retardant processing of various decoration materials. After the flame retardant processing of the material, in the external fire attack, can effectively prevent, delay or terminate the spread of the flame, so as to achieve the role of flame retardant.
1. Brominated flame retardants
Most brominated flame retardants will decompose at 200-300 ℃, and this temperature range is also the decomposition temperature range of polypropylene, so when polypropylene is decomposed by heat, brominated flame retardants also begin to decompose, and can capture the free radicals generated by the degradation reaction, thereby delaying or terminating the chain reaction of combustion. At the same time, the released HBr itself is a kind of flame retardant gas, which has a high density and can cover the surface of the material, play a role in blocking the combustible gas on the surface, and can also inhibit the combustion of the material.
The main disadvantage of brominated flame retardants is to reduce the anti-ultraviolet stability of the flame retardant substrate, and generate more smoke, corrosive gases and toxic gases during combustion, which limits its application.
2, phosphorus-nitrogen flame retardant.
Phosphorus-nitrogen flame retardants are also called intumescent flame retardants. When polymers containing such flame retardants are heated, a uniform layer of carbonaceous foam can be generated on the surface, which plays the role of heat insulation, oxygen insulation and smoke suppression, and prevents the phenomenon of molten droplets, so it has good flame retardant properties. The intumescent flame retardant system generally 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 retardant has the advantages of halogen free, low smoke and low toxicity.
3. Phosphorus flame retardant
The phosphorus flame retardant plays a flame retardant role in promoting the dehydration and carbonization of the initial decomposition of the polymer. This dehydration and carbonization step must rely on the oxygen-containing groups of the high polymer itself, and for high polymers with oxygen-containing groups in their own structure. Their flame retardant effect will be better. For polypropylene, because the molecular structure itself does not contain oxygen groups, the flame retardant effect is not good when the phosphorus flame retardant is used alone, but if it is compounded with (OH) 3 and Mg(OH)2, the synergistic effect can be produced, so as to obtain a good flame retardant effect.
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
WeChat Public Number QR Code
Mobile website QR code