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Hubercarb® Q2 is an ultra-fine ground calcium carbonate produced at Huber’s Quincy, Illinois plant which is known for its natural uniformity producing consistent purity and brightness. Carefully controlled particle distribution allows the material to be used in a wide range of applications including paints, coatings, PVC pipe and profiles, rubber and plastics.

Functions: Filler

Chemical Family: Calcium Salts, Carbonates, Kaolins

Compatible Polymers & Resins: Epoxies (EP), Polyolefins, Polyvinyl Chloride (PVC)

Particle Size: 2.0 - 2.0 microns

Oil Absorption: 18.0 - 18.0 g/100 g

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
CAS No.
471-34-1
EC No.
207-439-9
Technologies

Applications & Uses

Properties

Physical Form
Chemical Properties
ValueUnitsTest Method / Conditions
Calcium Carbonate96.5%
Magnesium Carbonate2.0%
Silica and Silicates1.0%
Other0.5%
Physical Properties
ValueUnitsTest Method / Conditions
Acid Solubility (in HCl)98.5 - 99%
Brightness (Hunter reflectance)90.0%
Compacted Bulk Density52lb/ft³ASTM C110
Loose Bulk Density44lb/ft³ASTM C110
Mesh size (+325) (45μm)0.005%
Median Particle Size (Cilas®)2.0μ
OIl Absorption18.0lbs oil / 100lbsASTM D281
Hegman Grind6.5
Moisture0.2%ASTM D280
Water Demand68.0mL/100 gms
Typical Properties
ValueUnitsTest Method / Conditions
Specific Gravity2.7ASTM D153
ColorWhite
pH (Saturated Solution)9.4ASTM D1208
Mineral Properties
ValueUnitsTest Method / Conditions
Hardness (Mohs)3
Linear Expansion Coefficient4.3 x 10^-6°C
Solubility (H₂O, 100°C)0.0035g/100ml
Weight per Gallon (s.g. x 8.345)22.6lbs
Particle Shape (Microscope)Irregular, uniaxial
Refractive Index (Hand. Of Chem. & Phy)1.6
Alkalinity (as NaOH)0.4mg/gmASTM D1208