What Effect Can Adding Magnesium Hydroxide In Flame Retardant Silica Gel Haveby Hu Yanchao Magnesium oxide manufacturers in China
Silicone rubber has high temperature, low temperature, weather resistance, ozone resistance and other excellent properties.
It has been widely used in various fields of national economy.
However, silicone rubber is flammable and will continue to burn, and to some extent limits its use in electrical and electronic, wire and cable, automotive, aerospace and other fields.
The following small series to introduce the flame retardant silica gel added in magnesium hydroxide will have what effect.
When magnesium hydroxide was added to silicone rubber, the limit oxygen index increased and increased with the increase of magnesium hydroxide dosage.
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 interface compatibility 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 can dilute the flammable gas, and it can also isolate the contact between silicone rubber and oxygen, thus acting as a flame retardant.
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 paraffin and other halogen flame retardants, and phosphorous flame retardants such as red phosphorus and phosphate ester.
Although these flame retardants have good flame retardant effect on silicone rubber, they do great harm to the environment due to the harmful gases released during combustion.
However, magnesium hydroxide will help to improve its dispersion in silicone rubber, improve its interface compatibility with silicone rubber, so that silicone rubber has flame retardant while maintaining good mechanical properties.
All in all, magnesium hydroxide has a good flame retardant effect on silicone rubber.
The flame retardant effect of silicone treated magnesium hydroxide is better than that of stearic acid treated magnesium hydroxide and untreated magnesium hydroxide.
That's what adding magnesium hydroxide to the flame retardant silicone does.
I hope I can help you.
Created on Apr 30th 2020 01:15. Viewed 229 times.