Crown Clay® is a high quality, air float, sedimentary, hard kaolin clay. Strict attention to production and quality control assures a high degree of product uniformity

Chemical Name: Kaolin

CAS Number: 1332-58-7

Chemical Family: Clays

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Enhanced TDS

Identification & Functionality

Features & Benefits

Materials Features
Product Features
  • Hard clays are very fine in their natural particle size. This limits how much hard clay can be incorporated into a rubber compound.
  • Typical loading levels range from 20 to 150 phr. Hard clay provides high modules, tensile strength, abrasion resistance, green strength and provides stiness to elasometric compounds

Applications & Uses

Markets
Applications
Industrial Additives End Use
Use Level
20 - 150

Properties

Physical Form
Typical Physical Properties
ValueUnitsTest Method / Conditions
Moisture Contentmax. 1%-
Oil Absorption38g/100g clay-
pH (at 10% DI Water)5--
Specific Gravity2.6g/cc-
Plasticity of Water25%-
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
AppearancePowder--
Physical StateSolid--
ColorLight gray to White--
OdorEarthy--
pH (aqueous solution)3.5 - 7.5--
Flash Pointmin. 93°C-
Relative Density2.4 - 2.7--
Insoluble inWater--
Particle Size Distribution
ValueUnitsTest Method / Conditions
Median Particle Diameter0.3μm-
Particle Size (Fineness, 0.5 µm)76%-
Particle Size (Fineness, 1 µm)87%-
Particle Size (Fineness, 10 µm)98%-
Particle Size (Fineness, 2 µm)92%-
Particle Size (Fineness, 20 µm)99%-
Particle Size (Fineness, 5 µm)96%-
Particle Size (Residue at max. 325 mesh screen)max. 0.25%-
Chemical Analysis
ValueUnitsTest Method / Conditions
Aluminum Oxide Content37.7%-
Calcium Oxide Content0.06%-
Ferric Oxide Content1.4%-
GE Brightness77--
Potassium Oxide Content0.05%
Loss on Ignition13.7%-
Magnesium Oxide Content0.06%-
Sodium Oxide Content0.03%-
Titanium Dioxide Content1.9%-
Silicon Dioxide Content45.10%

Regulatory & Compliance

Packaging & Availability