Flame retardant-Zinc Borate
1.Basic Index
Molecular formula | 2ZnO·3B2O3·3.5H2O | Molecular weight | 435.4 |
Appearance | white powder | Melting point | 980°C |
2.Specification
Item/Grade | Zinc borate ( 2ZnO.3B2O3 3.5H2O) |
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,% | 13.5-15.5 |
Fineness (Residue on 45um sieve ), % ≤ | 0.1 |
Specific gravity, g/cm3 | 2.67 |
Melting pointoC; | 980 |
Temp. of dehydration oC> | 320 |
Refractive index | 1.58 |
3.Application Field
Flame Retardant ZB is inorganic addition flame retardant. Its characteristics are that it has good hot stability, and not only stops buring and vanishes smokings but also be used with other inorganic flame retardant. It is used in epoxy resin, unsaturated polyester, polyurethane, etc. And it is widely used in rubber, plastic, cable, wood,etc.
4.Packing and store
Packing: brown paper double deck tectorial bag, and net weight per bag is 25kg.
store: storing in dry, ventilated and moistureproof conditions
