Seven driers. One standard of consistency.
Metal-based driers that control how a coating cures — surface dry, through dry, pigment wetting, anti-skinning, and everything in between that decides whether a film sets evenly or fails in the can. Every batch ships with a Certificate of Analysis.
Pick a drier. See the chemistry and the full spec.
Cobalt Octoate
- Metal content
- 2–12%
- Colour
- Violet
- Physical state
- Liquid
- Grades
- 7
The most active surface drier — fast oxidative cure at the film surface, used at 0.05–0.4% based on vehicle solids.
Cobalt octoate is the most active surface drier. Cobalt effects rapid surface drying and is generally used in conjunction with auxiliary driers. It is usually added at 0.05 to 0.4% based on vehicle solids. It is a strong oxidant. It is compatible with all surface coating media.
Atmospheric humidity does not affect Cobalt drier. This unique feature prevents water vapor present in atmosphere from penetrating the paint film. Cobalt octoate being the most effective drier promotes polymerization of media, hardens the paint film, improves gloss and water resistance and reduces brittleness of film.
The careful use of Cobalt octoate gives the paint film a good gloss, free from frosting tendency. This drier is a universal drier, which is essential in all the media and is capable of performing individually giving reasonable properties to the paint film.
In air-drying type insulating varnishes, use of Cobalt octoate increases water resistance, but excessive use causes brittleness and early failure of insulation. Cobalt octoate accelerates the catalytic action of Methyl Ethyl Ketone (M.E.K.) Peroxide to polymerize unsaturated polyester resin.
Technical specification
Co · 7 grades| Metal Content % | Tolerance | Colour | Physical State | Specific Gravity @30°C | Tolerance | Solid Content % | Tolerance | Viscosity @30°C (Sec.) |
|---|---|---|---|---|---|---|---|---|
| 2 | ±0.20% | Violet | Liquid | 0.815 | ±0.020 | 10.00 | ±3 | Max 15 |
| 3 | ±0.20% | Violet | Liquid | 0.830 | ±0.020 | 15.00 | ±3 | Max 15 |
| 6 | ±0.20% | Violet | Liquid | 0.880 | ±0.020 | 30.00 | ±5 | Max 15 |
| 9 | ±0.20% | Violet | Liquid | 0.940 | ±0.020 | 48.00 | ±5 | Max 25 |
| 10 | ±0.20% | Violet | Liquid | 0.965 | ±0.020 | 53.00 | ±5 | Max 40 |
| 11 | ±0.20% | Violet | Liquid | 0.990 | ±0.020 | 58.00 | ±5 | Max 75 |
| 12 | ±0.20% | Violet | Liquid | 1.015 | ±0.020 | 65.00 | ±5 | Max 10 |
Every batch ships with a Certificate of Analysis covering the tested parameters.
Need a metal concentration that isn't listed? Contact us — we formulate to target specification.