Function of eco friendly
magnesium hydroxide flame retardant
It is well known that the fire brings the civilization to the
human race and the nature, however it also brings disaster to
mankind in today's civilized world. In recent years, fires
caused by the burning of various materials that have become more
frequent in the world, which resulting in a large number of
casualties and huge economic losses. With the development of the
polymer materials industry and synthetic materials such as
plastics, rubber, and fibers, which is increasingly used in
construction, chemical, military, and transportation fields. Due
to the flammability of polymer materials, the flame retardant
technologies have received global attention. As early as ***0s,
some industrialized countries began to use the flame retardant
materials for polymers and other materials. Some countries have
also formulated flame retardant standards and fire regulations
for various materials. In addition to the direct selection of
polymer materials with high oxygen index and low calorific value,
the flame retardant technology of polymer materials is adding
flame retardant.
Classifications of eco
friendly magnesium hydroxide flame retardant
According to different chemical compositions, flame retardants
can be divided into two categories: organic flame retardants and
inorganic flame retardants.
Organic flame retardants mainly include the halogen flame
retardants, such as bromine and chlorine flame retardants.
Organophosphorus flame retardants mainly includes phosphates and
phosphonates.
Intumescent flame retardant mainly includes nitrogen and
phosphorus series.
Inorganic flame retardants mainly includes antimony-based flame
retardants, antimony trioxide and antimony pentoxide, etc.
Aluminum-magnesium flame retardants mainly includes magnesium
hydroxide and aluminum hydroxide flame retardants.
Inorganic phosphorus flame retardant agents, mainly includes red
phosphorus and polyphosphoric acid.
Boron flame retardants mainly includes zinc borate.
Molybdenum flame retardants mainly includes molybdenum trioxide
and ammonium octamolybdate.
With the growing demand for environmental protection, flame
retardants are developing towards environmentally friendly
inorganic flame retardants, which are efficient, inexpensive,
halogen-free, and non-polluting. Magnesium hydroxide is
considered to be the most promising and environmentally friendly
inorganic flame retardant because of its advantages of good heat
stability, non-volatilization, no toxic gas generation, no
corrosion processing equipment, and obvious smoke
elimination.
Working principle of eco
friendly magnesium hydroxide flame retardant
The flame retardant mechanism of the flame retardant is
relatively complicated, but its function is to cut off the
combustion cycle and the generation of smoke through physical and
chemical action. Magnesium hydroxide is a raw material of
chemical, which is rich in water of crystallization. It begins to
decompose when heated to **0
°C, releasing a large amount of
water of crystallization, while as absorbing a large amount of
latent heat, thereby inhibiting the temperature rising of the
polymer, delaying its thermal decomposition and reducing the
burning rate. The actual temperature withstanding the resin in
the flame is lowered, and the cooling effect of suppressing the
decomposition of the polymer and the generation of the
combustible gas is obtained. The magnesium oxide is formed after
decomposition from a good refractory material, which can cut off
the supply of oxygen, prevent the flow of flammable gas, and help
to improve the resin's ability to resist flame.
Application of eco
friendly magnesium hydroxide flame retardant
The basic research and application research of magnesium
hydroxide is very extensive and wide-ranging. Compared with the
other two inorganic flame retardants, which are calcium carbonate
and aluminum hydroxide, magnesium hydroxide has a superior flame
retardant effect in the solid degradation zone, and is also very
effective in suppressing smoke. When the magnesium hydroxide
flame retardant is used alone, the flame retarding effect is low
and the amount of addition is large. Therefore, the surface
modification of magnesium hydroxide is often carried out and
mixed with other flame retardants to improve the flame retarding
effect. The silane coupling agent is mixed with calcium stearate
and magnesium oleate to modify the surface of magnesium
hydroxide, which not only achieves the purpose of improving the
surface properties of magnesium hydroxide, but also forms a good
carbonized structure when the polymer material is burned, thereby
improves the flame retardant and mechanical properties of the
material.
Advantages of eco
friendly magnesium hydroxide flame retardant
The use of natural brucite to produce eco friendly magnesium
hydroxide flame retardant is an ideal choice. It is not only low
in cost, but also widely used in large quantities. China is
currently the world's largest proven reserves of brucite. The
supply of raw materials has established a good foundation for the
direct production of magnesium hydroxide by domestic development
of brucite. The development direction of flame retardant is to
use halogen-free flame retardant instead of normal flame
retardant, and inorganic flame retardant to replace organic flame
retardant. Eco friendly magnesium hydroxide flame retardant is
undoubtedly an excellent flame retardant, which with the
application of green chemistry and technology in the field of
flame retardant, is still in its infancy. The high-efficiency,
smoke-suppressing, non-toxic and harmless flame retardants,
especially environmentally friendly magnesium hydroxide flame
retardants is the proper choice for the company used the old
school flame retardant, which is all for security.
Specifications of eco
friendly magnesium hydroxide flame retardant
|
Item
|
Specifications
|
|
Mg(OH)2≥(%)
|
*9
|
|
CaO≤(%)
|
0.*2
|
|
Hydrochloric Acid
Insoluable Matter≤(%)
|
0.*5
|
|
Cl≤(%)
|
0.*5
|
|
Fe≤(%)
|
0.**5
|
|
Size
Residue≤(%)
|
0.*1
|
|
Size
D*0(μm)
|
1.**2.0
|
|
Ignition
Loss≥(%)
|
*1
|
|
Whiteness≥(%)
|
*6
|
|
Appearance
|
White Powder
|
Packaging & Storage
of eco friendly magnesium hydroxide flame
retardant
Package adopts plastic-woven sack with polythene inner bag of
*0kg, **0kg or ***0kg, or as required. Please stock at well
ventilated and dry place.
As a professional chemical supplier, Top head office is located
in the central of China-Zhengzhou city, and we own a large
storage and logistics company which can provide logistics service
for customers in China.
Logistics
system
Top Chemical cooperates with the world-famous logistics company
and has established a sound logistics system, which covers
container, bulk-cargo, sea and road transportation. Besides, we
have set up branch companies and storage centers in North
America, South America and Mid East. Professional sales staff and
efficient logistics team provide *4/7 service and ensure that the
company's products are sent to the customer's location.
