Metal Driers

Metal Driers
Dryo Co12%Cobalt 12% is the most active primary metal drier and therefore widely used in air-drying coatings. It is primarily an oxidation catalyst and act as a surface or top drier. To avoid rapid surface drying and to provide uniform drying cobalt is commonly used in combination with other metals driers such as manganese, zirconium, rare earth metals and calcium.
Dryo Co6%Cobalt 6% is the most active primary metal driers and therefore widely used in air-drying coatings. It is primarily an oxidation catalyst and act as a surface or top drier. It is low metal content product for low cost paints.
Dryo Ca5%Calcium 5% is secondary or auxiliary drier which act as promoters for the primary drier and increase the rate of oxygen uptake in air-drying systems considerably. Calcium driers have a significant synergistic effect contributing to improving through-drying when combined with primary driers as cobalt and manganese. Calcium driers help to improve hardness and gloss of the coating film.
Dryo Ca10%Calcium 10% is secondary or auxiliary drier which act as promoters for the primary drier and increase the rate of oxygen uptake in air-drying systems considerably. Calcium driers have a significant synergistic effect contributing to improving through-drying when combined with primary driers as cobalt and manganese. Calcium driers help to improve hardness and gloss of the coating film.
Dryo Pb36%Lead 36% is the most commonly used auxiliary drier and gives excellent through dry in most alkyd coatings. It is used in many industrial applications and is regarded as the most effective through drier over a wide range of temperature. Lead is used with an active oxidizing metal such as cobalt and manganese to decrease the total drying time.
Dryo Zr18%Zirconium 18% is secondary or auxiliary drier and act as promoter for the primary drier and increase the rate of oxygen uptake in air-drying systems considerably. Compared with other secondary driers zirconium has better properties in terms of color, yellowing and stability. In combination with cobalt it is particularly suitable for use in light-colored air-drying coatings.
Dryo Mn10%Manganese 10% is active or primary drier like cobalt and provides surface drying. It is strong oxidant and promotes polymerization to a greater degree than cobalt. In combination with lead, manganese may partially replace cobalt. It is preferred drier for durable hard finishes.