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Oxime-containing anti-skinning agents are frequently used to prevent the formation of in-can skinning in alkyd-based coating formulations. Common oximes used to combat skinning include Methyl Ethyl ketoxime (MEKO) and 2-Pentanone oxime. Unfortunately, these oximes are now facing regulatory pressures in various parts of the world.

In March 2022, the European Commission concluded that MEKO will be classified as a Carcinogen Cat. 1B, with labeling required at ≥ 0.1% MEKO content (European Commission: ATP 15-part 3 Annex VI). Shortly following this decision, Germany submitted a proposal to the European Chemical Agency’s (ECHA) Community Rolling Action Plan (CoRAP) to extend the same regulations for 2-Pentanone oxime. Within the next few years, both oximes will likely require GHS labeling if concentration limits exceed 0.1%.

Ascinin® oxime-free anti-skinning agents efficiently prevent skinning without worsening dry times in alkyd formulations while meeting global regulatory requirements. When used with cobalt-free high-performance catalysts (as cobalt driers are facing regulatory pressures in coating applications), dry times, non-yellowing, gloss, and hardness are improved, and formulators avoid the future need to reformulate oxime-free coating formulations with cobalt-free driers. Visit our oxime-free product pages for more info.

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