Talc

Mineralogy

Talc is a hydrated magnesium silicate, formed many millions of years ago. As a natural ore, talc is always found in combination with at least one other mineral, the most common being chlorite, which is a chemically and structurally similar ore. Other associated minerals often found with talc include dolomite and magnesite. Talc products used in our market segments are often a mix of talc and chlorite.

Physical properties: Lamellar

Specific gravity: 2,7-2,8

Mohs hardness: 1

Applications

Talc’s softness, lamellar structure and hydrophobicity make it an essential ingredient and process enabler in a wide range of end products. Including paints, paper, plastics, rubber, cosmetics, pharmaceuticals, fertilizers and animal feed.

In paints and coatings 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.

In plastics talc can improve the the scratch resistance, surface hardness and dimensional stability of the component.