Cobalt is the most important metal drier. It results in rapid surface drying and, in combination with a secondary drier such as zirconium, barium or zinc, in uniform through-drying of the paint film.
Octa-Soligen® driers are based on metal salts of 2-ethyl hexanoic acid (octoates) or their isomers. We supply cobalt octoates with different metal contents and solvents that meet the specific requirements of various applications:
Product Applications Octa-Soligen® Cobalt 10 solventborne systems Octa-Soligen® Cobalt 12 solventborne systems Octa-Soligen® Cobalt 12 (oil) printing inks Octa-Soligen® Cobalt 12 HS VOC-reduced and High-Solid coatings unsaturated polyesters Octa-Soligen® Cobalt 6 solventborne systems Octa-Soligen® Cobalt 6 HS VOC-reduced and High-Solid coatings unsaturated polyesters Octa-Soligen® Cobalt 8 (oil) printing inks
Octa-Soligen® Cobalt catalyses redox reactions and even small additions result in the dissociation of autoxidant hydroperoxides and to a change in valency from Co2+ to Co3+. Octa-Soligen® Cobalt thus results in rapid surface drying. A surplus of cobalt may result in defects such as wrinkling, poor through-drying and yellowing.
Octa-Soligen® Cobalt is used in all oxidative systems, whether air-or forced-drying.
It is used in architectural paints, industrial coatings, stains, varnishes, oil-based inks and artists’ colors.
In conventional alkyd formulations, the cobalt addition is between 0.03 and 0.08 %, calculated on the solid binder.
In printing inks, a combination of Octa-Soligen® Cobalt and Octa-Soligen® Manganese is recommended.The amount of cobalt is between 0.03 and 0.05 %, calculated on the solid binder.
Octa-Soligen® Cobalt can also be combined with Octa-Soligen® Zirconium and Octa-Soligen® Calcium.This yields outstanding results in systems that are free from heavy metals.
Irrespective of these guidelines, the addition should always be determined in preliminary trials.
Protect from the effects of weathering and store at temperatures below 50 °C.
Once opened, containers should be resealed immediately after each removal of the product.
Please refer to our safety data sheet for information relating to product safety.
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