Application Of Magnesium Hydroxide In Flame Retardant Silica Gelby Hu Yanchao Magnesium oxide manufacturers in China
It has been widely used in various fields of national economy. However, silicone rubber is flammable and continues to burn, somewhat limiting its use in electronics, electrical, electrical, electrical, electrical, automotive, aerospace and other fields.
Below to introduce the application of magnesium hydroxide in flame retardant silicone. When magnesium hydroxide is added to silicone rubber, the limit oxygen index increases and increases with the increase of the amount of magnesium hydroxide.
Magnesium hydroxide treated by organosilicon was evenly dispersed in silicone rubber, and the aggregate particles were small. Magnesium hydroxide particles were closely combined with silicone rubber, and the compatibility of the interface with silicone rubber was improved. Magnesium hydroxide in the decomposition process will absorb a lot of heat in the combustion area, reducing the temperature of the combustion. At the same time, the resulting water vapor dilutes the combustible gas and ACTS as a flame retardant by isolating contact between silicone rubber and oxygen.
In order to expand the range of silicone rubber, flame retardant modification has become one of the main research directions. Early flame retardants used in silicone rubber mainly include decabromodiphenyl ether, chlorinated paraffins and other halogen flame retardants, and phosphorous flame retardants such as red phosphorus and phosphate esters. Although these flame retardants have a good flame retardant effect on silicone rubber, they do great harm to the environment due to the harmful gas released during combustion. At the same time, magnesium hydroxide has no harmful gas release during combustion, and the residue after combustion will not cause pollution to the environment, so it has been widely used as an environmental protection flame retardant.
However, magnesium hydroxide has obvious flame-retardant effect only when the amount of magnesium hydroxide is large, and the mechanical and electrical properties of silicone rubber will be greatly damaged when the amount of magnesium hydroxide is large. Therefore, the surface modification of magnesium hydroxide will help to improve the dispersion degree of magnesium hydroxide in silicone rubber, improve its interface compatibility with silicone rubber, so as to make silicone rubber not only have flame retardancy, but also maintain good mechanical properties. All in all, magnesium hydroxide has a good flame retardant effect on silicone rubber.
The flame retardant effect of magnesium hydroxide treated with silicone is better than that of magnesium hydroxide treated with stearic acid and untreated magnesium hydroxide. The damage of magnesium hydroxide treated with silicone to the electrical insulation and mechanical properties of silicone rubber is lower than that of other two kinds of silicone rubber treated with magnesium hydroxide as flame retardant. The above is about magnesium hydroxide in the use of flame retardant silicone, I hope to help you.
MeiShen is the world's leading producer of magnesium oxide,Magnesium oxide is an oxide of magnesium, an ionic compound. It is a white solid at room temperature. Magnesium oxide exists in the form of periclase in nature and is a raw material for magnesium smelting. Magnesium oxide is white or light yellow powder, odorless, tasteless, this product is insoluble in water and ethanol, melting point 2852 ° C, boiling point 3600 ° C, magnesium oxide has high refractory insulation properties. It can be converted into crystal by burning at a temperature above 1000 ° C. If it rises above 1500 ° C, it will form a burnt magnesia or sintered magnesia.
Magnesium oxide can be used in the manufacture of metallurgy, smelting, advanced magnesia bricks, refractory materials and moisturizing materials. It is also widely used in rubber, rubber sheet, rubber products, pharmaceutical industry, food industry, plastic sheet accelerator, glass fiber reinforced plastics and Surface coating of silicon steel sheet, paper production, steel ball polishing, leather treatment, insulation materials, grease, dyes, ceramics, desiccant, resin, flame retardant, etc.
Hebei MeiShen Chemical Technology Group is the main magnesium oxide producer in the world. It is also the largest magnesium salt producer in China and has won the ISO9002 quality system certification. It also has GMP-Certification.
With rich experience in the research, development, production, management and operation of magnesium oxide products, MeiShen Group has always attached great importance to the research and development of new products and strict requirements on product quality.MeiShen has a high-level sales team.The business covers more than 20 countries and regions around the world.It is widely welcomed by new and old customers.
MeiShen has a high-level sales team.The business covers more than 20 countries and regions around the world.It is widely welcomed by new and old customers.
Created on May 13th 2020 02:16. Viewed 352 times.