Zinc Borate

Zinc borate is an inorganic compound, a borate of zinc. It is a white crystalline or amorphous powder insoluble in water. Its toxicity is low. Its melting point is 980 °C.

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Detailed Description for Zinc Borate

Zinc borate is an inorganic compound, a borate of zinc. It is a white crystalline or amorphous powder insoluble in water. Its toxicity is low. Its melting point is 980 °C. Flame Retardant are substances that can be chemically inserted into the polymer molecule or be physically blended in polymers after polymerization to suppress, reduce, delay or modify the propagation of a flame through a plastic materials. There are several classes of flame retardants; Halogenated Hydrocarbons (Chlorine and Bromine containing compounds and reactive flame retardants), Inorganic flame retardants ( Boron compounds, Antimony oxides, Aluminium Hydroxide, molybdenum compounds, zinc and magnesium oxides ), Phosphorous containing compounds (Organic phosphate esters, phosphates, halogenated phosphorus compounds and inorganic phosphorus containing salts).

 

                              Item/Grade
 
Excellent grade
First grade
Whiteness
99
95
Surface water%≤
0.5
1.0
Particle size, um
3-5
3-5
ZnO, %
37.0-40.0
B2O3 , %
45.0-48.0
Loss on ignition,%
13.515.5
Fineness (Residue on 45um sieve ), %  ≤
0.1
Specific gravity, g/cm3
2.67
Melting point
980
Temp. of dehydration >
320
Refractive index
1.58

 

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE White crystalline powder
   
   
SOLUBILITY IN WATER Insoluble
pH 7.6
   
STABILITY Stable under ordinary conditions

 

APPLICATIONS:

Zinc Borate is used as a flame retardant and smoke suppressant for wide range of plastics, rubbers, paper and textiles. It can replace antimony oxide as a synergist in plastics and rubber to enhance the activity of primary flame retardants by stepwise releasing the radicals. in a wide variety of end-use products including . It is also used in paints, adhesives, pigments and ceramic industries. It also acts as an antifungal agent and as a soil amendment to improve the vigor of plants.


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