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Highly selective cobalt-based catalyst for controlled oxidative crosslinking.
Optimized for low-temperature curing in ambient and forced-dry systems.
Excellent storage stability—retains activity for ≥12 months at 25 °C in sealed containers.
Low volatility and non-hazardous handling profile per GHS classification.
Compatible with alkyd, acrylic-alkyd hybrid, and modified polyester resin systems.
Industrial maintenance coatings requiring rapid through-cure.
Decorative wood finishes with high-gloss retention and minimal yellowing.
Automotive refinish primers and clearcoats for OEM-compatible performance.
Can coatings for food-contact compliant metal packaging (subject to final formulation validation).
Marine and protective coatings exposed to high humidity and salt spray environments.
| Chemical Type | Cobalt carboxylate complex |
| Product Form | Liquid solution in aromatic hydrocarbon solvent |
| Appearance | Clear, reddish-brown liquid |
| Cobalt Content (wt%) | 6.0–6.5% |
| Density (20 °C, g/cm³) | 0.89–0.92 |
| Flash Point (°C, closed cup) | 42–48 |
| pH (1% in water) | Neutral (6.5–7.5) |
| Primary Applications | Oxidative drying of alkyd and hybrid resin coatings |
Q1: What is the primary chemical function of Borchi Kat 0245 in coating and ink formulations?
A: Borchi Kat 0245 is a cobalt-free, heavy-metal-free oxidation catalyst designed to promote efficient air-drying of alkyd- and oil-based systems through autoxidative crosslinking. It functions as a redox-active metal complex that accelerates peroxide decomposition and radical generation without relying on traditional cobalt or manganese.
Q2: Is Borchi Kat 0245 compatible with water-reducible or hybrid resin systems?
A: Yes — Borchi Kat 0245 demonstrates good compatibility with water-reducible alkyds, acrylic-alkyd hybrids, and solvent-borne systems. Its formulation allows for stable dispersion in both polar and moderately non-polar media, though optimal performance requires evaluation under specific pH and co-solvent conditions typical of the target formulation.
Q3: How does Borchi Kat 0245 compare to conventional cobalt driers in terms of drying profile and film quality?
A: Unlike cobalt-based driers, Borchi Kat 0245 provides more balanced through-dry with reduced surface wrinkling and improved resistance to premature skinning in the can. It typically delivers consistent surface dry within standard ambient curing windows while supporting better long-term film clarity and yellowing resistance, especially in white or pastel coatings.
Q4: What is the recommended dosage range for Borchi Kat 0245 in standard alkyd coatings?
A: Dosage is formulation-dependent, but Borchi Kat 0245 is typically used at low concentrations — generally ranging from 0.1% to 2% by weight relative to total resin solids. Optimal levels should be determined experimentally based on desired dry time, film hardness development, and compatibility with other additives.
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E-mail: wangxingqiang@ericwchem.com
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