Hexagonal magnesium hydroxide flame retardant has the advantages of smoke suppression, green and environmental protection, but due to its low flame retardant efficiency, it often requires a large filling amount when used in polymer substrates, and because magnesium hydroxide is used as an inorganic The powder has the characteristics of hydrophilic and oleophobic, and high polarity, which is not conducive to the interfacial compounding of inorganic/organic materials.
A higher filling amount will lead to a significant decrease in the mechanical properties of the polymer composite material added with magnesium hydroxide. In order to improve the compatibility of the inorganic/organic interface between magnesium hydroxide and polymer substrates, Hebei Messi Biology Co., Ltd. selected 3-methacryloxypropyltrimethoxysilane (A-174) to hexagonal Magnesium hydroxide is used for dry modification.
This silane coupling agent can be copolymerized with vinyl acetate, acrylic acid or methacrylic acid monomers. It is often used in the wire and cable industry. It can improve the interfacial compatibility of composite materials and improve Anti-static performance of cable material.
Hebei Messi Biology Co., Ltd. has studied the factors affecting the effect of dry process modification of hexagonal magnesium hydroxide, namely the amount of modifier, modification temperature, modification time and stirring speed. Using the single factor experiment method, through the determination of the activation index of the modified powder, the optimal process conditions for the effect of the silane coupling agent A-174 modified magnesium hydroxide were determined, and characterized by SEM, thermogravimetric analysis and infrared spectroscopy. Methods The modification mechanism and modification effect of magnesium hydroxide modified by silane coupling agent A-174 were discussed.
1.1 Experiment
1.1.1 Reagents and instruments
Hexagonal magnesium hydroxide (Hebei Messi Biology Co., Ltd.), 3-methacryloxypropyltrimethoxysilane, dioctyl phthalate DOP, DHG-9140A type electric heating constant temperature blast drying oven, FA2004 Type electronic balance, Y100L2-4 high-speed mixer, DJ-1 timing electric mixer, JSM-5610LV/INCA scanning electron microscope, STA449F3 synchronous thermal analyzer, Nexus Fourier transform infrared spectrometer
1.1.2 Modification method
First...
https://tibetmag.com/silane-coupling-agent-modified-hexagonal-magnesium-hydroxide-flame-retardant/
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