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Why does the use of magnesium hydroxide cause yellowing of PP building templates

Magnesium hydroxide is a new type of filled flame retardant, through the thermal decomposition of the release of combined water, absorb a large amount of latent heat, to reduce the surface temperature of the synthetic material it filled in the flame, with the decomposition of the polymer and the combustible gas produced by the cooling effect.

Magnesium hydroxideIt is a new type of filled flame retardant, through the thermal decomposition of the release of combined water, absorb a large amount of latent heat, to reduce the surface temperature of the synthetic material it filled in the flame, with polymer decomposition and the resulting combustible gas cooling effect. Magnesium hydroxide flame retardant can cause yellowing of PP building templates. What is the reason? The following is a brief introduction.
1. In order to achieve the flame retardant effect and performance requirements, PP material is modified by adding flame retardants and some copolymers. Some flame retardants and some additives have certain temperature requirements. When a certain temperature is reached, the flame retardant will decompose and carbonize, resulting in yellowing and yellowing;
2. The temperature is set too high during injection molding;
3. Overlong stoppage;
4. There is deviation in the temperature control of the machine;
5. If the back pressure adjustment is too high, yellowing and yellowing will occur when the local shear heat in the barrel is too high.
The above is about the reason why magnesium hydroxide flame retardant causes yellowing of PP building templates, hoping to help everyone.

What are the multiple effects and wide application of magnesium hydroxide?

Five steps of decomposition of magnesium hydroxide ingredients

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What are the reasons for the failure of flame retardant after adding aluminum hydroxide flame retardant?

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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