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Product Name | rubber grade Activated zinc oxide |
white /slight yellow fine powder , specific gravity 5.5-6.5 , granularity 0.15-0.7um , refractive index is 1.95-2.05 , specific heat in 20 °C 0.0915 ka. /g. °C, melting point 1973 °C, Zinc oxide evaporates in 1000 °C .
Standard: HHXPQB-YHX(HX)-2005
Technical index
Item | tyre | rubber | desulphurizer | |
1 # | 2 # | |||
Zinc oxide ( ZnO ),% ≥ | 95-98 | 95-98 | 95-98 | 95-98 |
Moisture,% ≤ | 0.7 | 0.7 | 0.7 | 0.7 |
Water soluble matter ,% ≤ | 0.5 | 0.7 | 1.0 | 0.5 |
Loss on ignition , % ≤ | 1-4 | 1-4 | 1-4 | 1-4 |
Insoluble matter in HCl,% ≤ | 0.02 | 0.05 | 0.08 | 0.02 |
lead oxide ( Pb ),% ≤ | 0.01 | 0.05 | 0.08 | 0.01 |
Fineness (45um screen , residue ) ≤ | 0.1 | 0.4 | 1.0 | 0.1 |
specific surface area (m2 /g) , | 45-60 | 35-45 | 30-40 | 45-60 |
bulk density (g/m3 ) , | 0.25-0.35 | 0.40-0.50 | 0.40-0.60 | 0.25-0.35 |
rubber grade zinc oxide