Grinding aid chemicals which are used in the grinding of calcium carbonate (CaCO3) to prevent agglomeration are chemisorbed on the surfaces of particles, and the compatibility of them with the solvent, water, or organic resin affects the dispersion of the minerals and ultimately down-stream product properties in consumer industries such as paint, papermaking, and plastic. This study tries to explain the effects of triethanolamine (TEA) and monoethylene glycol (MEG), which are most commonly used as grinding aids, on the behavior of CaCO3 in water-based paints and on the properties of the paints. The powder properties of CaCO3 (grain size, color, surface area, oil absorption capacity, zeta potential, etc.) were characterized, and the changes in the can stability, ease of application, and optical properties (gloss, opacity) of the paints were revealed with rheological and optical analysis. It was observed that amine compounds remained in higher amounts on the CaCO3 surface and created negative results in the paint. On the other hand, glycol compound adhered less on the CaCO3 surface and affected the properties of the final product less than the amine compound. Therefore, CaCO3 ground without using any chemicals gives the best results in terms of long-term stability, ease of application, and visuality of the paint.
We offers a wide range of calcium carbonate of different particle size assuring that our different clients will receive suitable quality material with cost-efficiency. We have the purest and brightest source of calcium carbonate and exploit the high standard of sustainability with uncoated and coated Calcium Carbonate (Stearic acid coating Calcite Powder). Raw materials are chosen carefully and the production process is conducted in ISO standard factories to ensure the most consistent quality for end-users.
Uncoated calcium carbonate is natural calcium carbonate obtained from high purity Vietnam lime stone. It is used in many industries as filler to reduce production cost. We can provide a wide range of particle size from 5 to 450 microns.
Coated calcium carbonate is made from uncoated calcium carbonate with 1% stearic acid. It is used for replacing some expensive polymers and additives to reduce production cost with particle size ranging from 5 to 45 microns.