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LKAB Minerals UltraCarb LH15C-10 Hydrated Magnesium Calcium Carbonate
Categories: Ceramic; Other Engineering Material; Additive/Filler for Polymer

Material Notes: Mineral Flame Retardant

Ultracarb combines properties normally associated with several different materials that can be used jointly or individually to benefit many applications including rubber, plastics, surface coatings, mastics and sealants. The flame-retardant properties make it a valuable alternative to many of the traditional flame-retardants used in the plastics and rubber industry. The endothermic decomposition absorbs heat and reduces the flame and surface temperature of the burning polymer. The evolution of 53% of the original weight as non-flammable carbon dioxide and water vapor dilutes the oxygen near the burning surface as well as any smoke and flammable gases which are evolved during combustion.

The onset of decomposition occurs at 220°C, allowing Ultracarb to be incorporated in high-melt polymers and enables improved compounding rates in intermediate melting point polymers. The fine particle size distribution of Ultracarb yields polymer compounds with good surface finish and improved mechanical properties.

The product also offers rheological properties beneficial to the manufacture and practical application of a range of adhesives and sealants, providing a viable alternative to the precipitated calcium carbonates traditionally employed in these systems. In addition to flame retardant and rheological properties, Ultracarb offers a high brightness and neutral whiteness that makes it an ideal extender for titanium dioxide particularly in surface coating applications. Applications: PVC, Elastomers, Thermoset

Key Words: CaCO3
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Physical PropertiesOriginal ValueComments
Specific Gravity 2.50 g/cc
Bulk Density 0.200 - 0.500 g/ccLoose
Oil Absorption 20 - 40 %
Particle Size 0.60 µm10%
 3.0 µm50%
 9.0 µm90%
Specific Surface Area 11 - 13 m²/g
 
Mechanical PropertiesOriginal ValueComments
Hardness, Mohs 2.5
 
Optical PropertiesOriginal ValueComments
Refractive Index 1.56
 
Component Elements PropertiesOriginal ValueComments
Al2O3 0.10 %
CaO 6.0 - 9.0 %
Fe2O3 0.050 %
K2O 0.010 %
Loss on Ignition(%) 51 - 54 %
MgO 36 - 39 %
SiO2 0.20 - 1.0 %
Sulfur, S 0.10 %
 
Descriptive Properties
Acid Insoluble Matter, wt%1 to 3
AppearanceWhite powder
Coating Level %1
color (L*)97
Moisture loss %0.6105°C

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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