Talc Powder For Paints
Talc confers a whole range of benefits to coatings. In interior and exterior decorative paints, they act as extenders to improve hiding power and titanium dioxide efficiency. Talc’s lamellar platelets make paint easier to apply and improve cracking resistance and sagging by acting as bridges between binder agglomerates and strengthen the paint film. They also enhance matting. In anti-corrosion primers, Talc is used to improve corrosion resistance and paint adhesion. Talc also brings benefits to inks, jointing compounds, putties and adhesives. The also help in improving the weather resistance of outdoor paints by reducing oxygen or water transmission thus protecting the binder from UV radiation, thus Color, particle size and oil absorption are the main criteria for selecting Talc for paint manufacture.
Salient Feature:
Mud Cracking Resistance
Our Talc’s platy particles act as bridges between binder agglomerates and strengthen the paint film. The higher the aspect ratio and particle size of the Talc, the better the mud cracking resistance.
Matting
Our Talc gives a silky look to paints. Coarse, lamellar Talc particles are very efficient matting agents in high PVC paints. Our fine Talc with high surface area can be used to absorb excess binder and give a flattening effect to paints or coatings below critical PVC.
High Solids
Our double classified, de-dusted Talc with low surface area (low oil absorption) allow a higher filler loading in high solids coatings, resulting in lower VOC emission, lower formulation cost and improved performance at the same time.
Barrier Effect
The Talc platelets reduce oxygen or water transmission, and protect the binder from UV radiation, thus improving the weather resistance of outdoor paints.
Wet Scrub Resistance
Our Talc grades improve the wet scrub resistance of decorative paints, in contrast to Talc containing chlorite (Mg-Al-Silicate), which is not hydrophobic.
Anti-Corrosive
The same barrier effect reduces migration of corrosive agents through steel protective coatings. At the same time, the hydrophobic (unipolar) Talc increases the adhesion of the coating film on the steel substrate, while the platelets improve the mechanical strength of the film.
Physical Properties:
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Brightness |
90 ~ 97% |
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Whiteness |
91 ~ 98% |
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Specific Gravity |
2.70 |
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Moisture |
0.10% |
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Bulk Density |
0.35 ~ 0.80 (Depending upon the Particle Size) |
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LOI |
6.0% +/- 0.5% |
|
Appearance |
Free Flowing Dry Powder |
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Carbonate |
1.5 % Max |
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Retention on 500# |
0.002% Max |
Chemical Properties:
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SiO2 |
58 – 63% |
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MgO |
28 – 33% |
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CaO |
<2% |
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Al2O3 |
<0.5% |
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Fe2O3 |
<1.0% |
Particle Size Distribution:
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D-97 |
35.00 ~ 15.00 μ |
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D-50 |
4.00 ~ 10.00 μ |