Calcium carbonate coated is a form of calcium carbonate (CaCO₃) that is treated with a coating, typically made of stearic acid. This coating improves its properties for specific industrial applications. Here are some key details:

Composition: It’s primarily calcium carbonate, coated with a thin layer of fatty acids like stearic acid.

Uses:

1. Plastics Industry: Used as a filler in polymers like PVC, polypropylene, and polyethylene to improve the material’s performance by enhancing its mechanical properties and reducing production costs.
2. Paper Industry: Acts as a pigment or filler to enhance brightness, smoothness, and printability.
3. Paints and Coatings: Provides improved dispersibility and reduces the need for dispersing agents.
4. Rubber Industry: Used to improve tensile strength and resistance to abrasion.

Advantages:

1. Enhances dispersion in non-polar matrices (e.g., in plastics).
2. Improves the product’s surface finish and mechanical strength.
3. Offers better water resistance and stability than uncoated calcium carbonate.

Physical Properties:

1. Fine powder form.
2. White in color.
3. High purity and low moisture content.

Coated calcium carbonate is preferred in applications where better surface interaction, hydrophobicity, and improved mechanical performance are required.