Name: Iron Octoate Drier 6%
Brand: Coatingsink
SKU: iron-drier-6pct
Availability: InStock

Question 1

Why does iron octoate cause yellowing, and how can this be managed?

Accepted Answer

Iron ions catalyze chromophore formation during oxidative crosslinking, causing perceptible yellowing in the dried film. This limits iron octoate to dark-pigmented systems (deep tones, black, brown). Avoid use in white or light pastel alkyd formulations where color stability is critical.

Question 2

What is the recommended dosage of Iron Octoate Drier 6% in an alkyd formula?

Accepted Answer

Typical addition level is 0.02–0.08% Fe on total binder solids. Overdosing accelerates surface skin formation without improving through-dry and may cause long-term film brittleness. Iron is usually combined with a surface drier such as cobalt (0.02–0.05% Co) or manganese for a balanced drying profile.

Question 3

Can iron drier fully replace cobalt drier in an alkyd system?

Accepted Answer

No. Iron is primarily a through-drier and lacks cobalt's surface-drying efficiency. In cobalt-free systems, manganese/bismuth blends are the preferred surface-drier substitutes. Iron can serve as a secondary through-drier support component within a multi-metal cobalt-free package.

Appearance	Dark amber to brown liquid
Flash Point	> 60°C
Density (20°C)	0.93 g/mL
Iron Content (Fe)	6.0% min
Viscosity (25°C)	< 50 mPa·s

Iron Octoate Drier 6%

Specifications

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