Borchi® OXY-Coat is an iron metal-based high-performance cobalt-free drier catalyst for improved drying time in paints containing alkyd resins. It demonstrates excellent drying performance at low use levels in solvent-based short, medium, and long oil alkyd paint. This solution may not require the use of an auxiliary drier. Cobalt-free driers do not contain metals like cobalt that may face regulatory concerns in coating applications. Borchi® OXY-Coat is particularly efficient in coatings using propylene glycol.
Coatings typically need a metal catalyst to achieve the best dry times. As a high-performance metal-based catalyst, Borchi® OXY-Coat is applicable in a wide range of alkyd coating systems that dry oxidatively.
Cobalt-free paint driers are ideal long-term solutions for formulators looking to meet potential regulations surrounding cobalt in coating applications.
For example, the European Union has proposed stricter Occupational Exposure Limits (OELs), 0.01 mg/m³ for particles that can be breathed in through the nose and mouth, and 0.0025 mg/m³ for finer particles that can reach deeper into the lung.
In June 2022, the U.S. EPA prioritized Cobalt and Cobalt Compounds for risk assessment and possible regulatory reclassification.
Performance benefits of Borchi® OXY-Coat include improved drying time, wrinkling prevention, and corrosion resistance in alkyd-based paint. This solution also provides brighter whites and reduces yellowing in coatings. Adhesion is improved in direct-to-metal applications with the use of this product. Borchi® OXY-Coat can also eliminate or reduce the need for anti-skinning agents.
Borchi® OXY-Coat works well for exterior coatings used in adverse weather conditions. This extends the coatings season window for paint applications.
Compared to cobalt carboxylate driers, cobalt-free paint driers allow for the use of exterior coatings in standard and adverse conditions. They provide improved dry times in low temperature, high humidity weather
Color advantages include reduced yellowing in coatings compared to cobalt
Compared to cobalt alternatives, Borchi® OXY-Coat prevents wrinkling, creating a smooth appearance
Borchi® OXY-Coat can help inhibit corrosion better than cobalt alternatives in direct-to-metal alkyd coating applications
Borchi® OXY-Coat can provide excellent wet adhesion in direct-to-metal alkyd coating applications
Compared to traditional driers like cobalt, high-performance catalysts like Borchi® OXY-Coat can eliminate for the addition of drier accelerators to achieve optimal dry times in alkyd formulations.
While Borchi® OXY-Coat can work in water- and solvent-based systems, it tends to work best in solvent-based alkyd systems. Borchi® OXY-Coat 1101 is ideal for water-based alkyd coatings. Borchi® Dragon is designed for use in high solids alkyds.
When anti-skins are needed in an alkyd formulation, Borchi® OXY-Coat can be used with oxime-free anti-skins to enable enhanced skin prevention, storage stability, and minimal effect on dry times in alkyd coatings. With oximes also facing regulatory scrutiny, this combination can help improve product labeling.
When formulated with Borchi® Guard T oxime-free anti-skin in a long oil alkyd formulation, 25% faster dry hard times were achieved, along with 7x longer skin prevention compared to an oxime-containing anti-skin alternative. 
Ideal applications for Borchi® OXY-Coat include wood, industrial, and architectural coatings, as well as printing inks.
| Appearance | Clear brown to yellow liquid |
| Viscosity | Max. 200 mPa·s (informative) ISO 3219 (A) (20 °C) |
| Density | Approx. 1.04 g/cm3 (informative) DIN 51757 (20 °C) |
| Solvent | 1,2-propylene glycol (informative) |
All resin systems are unique and will require the level of Borchi® OXY - Coat to be optimized for the best cost and dry. We recommend using a ladder study of 0.5 -3 % Borchi® OXY - Coat as supplied on resin solids. Please keep in mind that too much Borchi® OXY – Coat might inhibit through dry. Borchi® OXY - Coat should be added as one of the last ingredients before the Anti-Skinning agent.
Protect from the effects of weathering and store at temperatures between 5 and 30 °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.
For chemical inventory status, please review section 15 of the current SDS.
Click here to access the SDS portal.
For additional regulatory information, please contact regulatory@milliken.com.
