MEKP Premium (Low Cobalt Optimized)
Key Features
- Optimized for low cobalt cure systems, reducing discoloration risk
- High hydroperoxide content for efficient radical generation
- Excellent color stability in clear and lightly pigmented systems
- Improved shelf stability at elevated ambient temperatures
- Consistent cure at reduced accelerator levels
MEKP Premium Low Cobalt Optimized is a high-purity methyl ethyl ketone peroxide formulation engineered to deliver excellent performance at reduced cobalt accelerator levels, typically 0.3–0.6% cobalt octoate (6%). This grade features a refined monomer distribution with an elevated proportion of the hydroperoxide species, which increases initiator efficiency and allows laminate producers to reduce cobalt content without sacrificing cure kinetics or through-cure quality. Reduced cobalt levels benefit end-products by minimizing the risk of cobalt migration-related discoloration in clear laminates and gelcoats, and by reducing the overall environmental and occupational exposure to cobalt compounds. The product is particularly suited for high-gloss gel coat applications and clear casting work where color stability is critical. Gel times of 20–35 minutes at 20°C are typical with optimized cobalt/MEKP ratios. The formulation also exhibits improved stability at elevated storage temperatures, extending practical shelf life in warm climates. Standard dosage is 1.5–2.5% on resin.
Specifications
| Parameter | Value |
|---|---|
| Appearance | Water-white to pale yellow liquid |
| Shelf Life | 12 months at ≤20°C |
| Density (20°C) | 1.10–1.12 g/cm³ |
| Active Oxygen Content | 33.5% ± 0.5% |
| Hydroperoxide Content | ≥55% of active species |
| Recommended Co Octoate (6%) | 0.3–0.6% |
Applications
FAQ
Typically 0.3–0.6% cobalt octoate (6%) is sufficient for ambient cure at 18–25°C. This is roughly half the cobalt level used with standard MEKP. A trial cure is recommended before full production runs to fine-tune the cobalt/MEKP balance for your specific resin and shop temperature.
Direct Contact
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