Description
Talc increases coverage and weather resistance of the products. The use of talc creates a barrier effect, which limits the penetration of water and corrosive agents into paints and coatings. This properties lead to a reduction in bubble formation, corrosion and peeling. Talc is used as an extender and filler in paints. The platy shape of talc particles improves the suspension of solids in the can and helps the liquid paint adhere to a wall without sagging. Powdered talc is a very bright white color. This makes talc an excellent filler in paint because it simultaneously serves to whiten and brighten the paint. Talc’s low hardness is valued because it causes less abrasion damage on spray nozzles and other equipment when paint is applied.
Application
Application for Zinc Oxide Paint Grade:
- Paint – White pigment, fungicide and tint retainer.
- Match – Binder and oxygen source.
- Chemical – Zinc source for zinc chemical production
| Item Test | Requirment | Result | Method |
| Self Colour | Shall be equivalent of close to STD | YES | TGEC/110 |
| Brightness | 97% Min +/- 0.5% | 97.80% | TGEC//287/2 |
| Whitness | 98% Min +/- 0.5% | 98.40% | TGEC/244 |
| Bulk Density | 0.42 +/- 0.5 | 0.39 | TGEC/115/3/01 |
| Oil Absorption | 34 +/- 3 ML | 37 ML | TGEC/173 |
| LOI | 8% Max | 5.70% | TGEC/211 |
| Average Particle Size | D98-Below 33 Microns D50-Below 5 Microns |
27.3 µ 4.88 µ |
Sedigraph 5100 |
| Kaolin | Quartz | Philite | Feldspar | Talc | |
| SiO2 | 44.2 | 99.66 | 69.48 | 66.8 | 62 |
| Al2O3 | 40.2 | 0.15 | 16.36 | 18.3 | 0.01 |
| Fe2O2 | 0.34 | 0.04 | 2.26 | 0.1 | 0.07 |
| TiO2 | 0.5 | 0.01 | 0.6 | 0.01 | 0.01 |
| MgO | 0.09 | – | 3.22 | 0.1 | 32.3 |
| CaO | – | – | – | – | 0.01 |
| K2O | 0.14 | – | 4.42 | 8.13 | 0.01 |
| Na2O | 0.38 | – | 0.09 | 3.7 | 0.01 |
| LoI | 15 | 0.25 | 5 | 0.01 | 5 |
