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NYAD 1250 Wollastonite
Fine Particle Size Grade
Wollastonite
Fillers and Extenders
NYAD 1250 wollastonite is the base grade for the 10 WOLLASTOKUP surface modified wollastonite product line.
Appearance: Brilliant white
Shape: Acicular
Molecular weight: 116
Specific Gravity: 2.9
Refractive index: 1.63
pH (aqueous solution): 9.9
Water solubility (gms./100cc): 0.0095
Density (lbs./solid gallons): 24.2
Bulking value (gal./lbs.): 0.0413
Moh's hardness: 4.5
Coefficient of expansion (in/in/C): 6.5x10 -6
Melting point (C): 1540
Chemical Composition CaSiO3:
Component:
CaO: 47.0%
SiO2: 50.0
Fe2O3: 0.5
Al2O3: 1.0
MnO: 0.1
MgO: 0.3
TiO2: 0.05
Typical Values:
Brightness: G.E. Brightness: 95
Oil Absorption: ml/100 grams: 32
Fineness of Grind: Hegman: 8
Bulk Density:
Loose: lbs./cu.ft.: 30
Tapped: lbs./cu.ft.:50
Aspect Ratio: Ratio L/D:3:1
Surface Area: m 2/g: 3.3
Minus 30 Micron: %: 100
Minus 10 Micron: %: 96
Moisture: %: 0.25
Loss on Ignition: %: 0.70
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UNOCAL CHEMICALS DIVISION.
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