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ALUCHBM Hydrated Aluminas
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Fillers and Extenders
Hydrated Aluminas
chemical formula:Al2O3-3H2O or Al(OH)3
Refractive Index of 1.57: Allows some translucency in many polymer systems
Specific Gravity of 2.42: Lower than most common mineral fillers affording more resin extention per pound of use
Mohs' hardness of 2.5-3.5: nonabrasive
Insoluble in water
Low free-moisture contents of 0.1-0.6%
Non-hydroscopic
Inert between pH 3.5 to 10.5
Non-toxic: GRAS list of Dept. H.E.W.: safe handling and FDA approved for food packaging applications
High chemical purity: As a refined filler, only minor contaminates of iron, silica, and soda
Specific Gravity: 2.42
Decomposition Temperature: 220C
Refractive Index: 1.57
Mohs' Hardness: 2.5-3.5
pH (10% Slurry): 8-10
Appearance: Crystalline Powder
Typical Chemical and Physical Properties for ALUCHEM Hydrated Aluminas:
Sintered Hydrates:
Color: White
Color Reflectance: 93-98
AL2O3, %: 65.0
L.O.I. (1100c), %: 34.5
SiO2 %: 0.01
Fe2O3, %: 0.006
Bayer Hydrates:
K Series:
Color: Off-White
Color Reflectance: 85-95
AL2O3, %: 65.0
L.O.I. (1100C), %: 34.5
SiO2 %: 0.01
Fe2O3, %: 0.01
M Series:
Color: Off-White
Color Reflectance: 80-92
AL2O3, %: 65.0
L.O.I. (1100C), % 34.5
SiO2 %: 0.01
Fe2O3, %: 0.01
Industrial field others
UNOCAL CHEMICALS DIVISION.
Phone (800)-CHEMS-76
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Address 1345 N. Meacham Rd. Schaumburg, IL 60196
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