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BARYTES
Barytes is a common mineral
and makes very attractive specimens. It often is an
accessory mineral to other minerals and can make a nice
backdrop to brightly colored crystals. At times bladed
or tabular crystals of Baryte form a concentric pattern
of increasingly larger crystals outward. This has the
appearance of a flower and when colored red by iron
stains, these formations are called "Desert Roses".
Because Baryte is so common, it can be confused for
other minerals.
Celestite (SrSO4) has
the same structure as barite and forms very similar
crystals.
Barytes is chemically known
as Barium Sulphate (BaSO4).
Properties / Advantages
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High Purity |
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Stable, reproductive
properties of end products. |
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Good Brightness |
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Neutral white tone, good
hiding effect, consistent color of end product. |
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Low Moisture Absorption |
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Good molded surface, well
suited for plastic paints. |
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Low Iron Content |
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Low Yellowness Index. |
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Low Polarity |
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Wetted more efficiently by
vehicle; thereby producing better dispersion &
stronger bond. |
Application Scope
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Used in Primers, Road
Marking
paints
and Alkali Proof
paints,
etc. |
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It is
widely used in High grade Emulsion
paints
& Primers as an effective extender pigment. It
has been able to replace 15%- 25% of TiO2
depending upon the paint formulation. |
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By virtue
of Barytes addition, which causes air filled
voids to form and become an integral part of the
film, opacity is significantly enhanced. |
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Barytes is
also used in
plastic
products. |
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Barytes
addition acts as effective spacers for
maximizing opacity. As TiO2 particles
tend to agglomerate, spacing agents like Barytes
helps to minimize loss of the high refractive
index interface. |
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Because of
internal void volume and open packing structure
arising from irregular shape Barytes is more
efficient in opacity enhancement in water based
paints. Scrub resistance imparted by Barium
Sulphate is improved as particle size is
increased. |
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The
increased toughness of paint films containing
Barytes is related to better wetting and
adhesion. The relatively lower polarity Barytes
is wetted more efficiently by vehicle; thereby
producing better dispersion & stronger bond. |
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