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Thursday, 09 July 2020

Novel Coatings: same performance with fewer layers

Thursday, 9 May 2013 | Posted by: Sonja Schulte, European Coatings Journal

Two articles in the May-Issue of the European Coatings JOURNAL aroused my interest, because both are dealing with groundbreaking innovations: highest levels of durability without priming on a plastic substrate and effective protection of metal structures against corrosion with only one layer of a waterborne dispersion

Effective corrosion protection generally requires two or more coats of paint, each with different properties. Now Grégory Delmas and his co-authors from Arkema have developed a waterborne binder system which protects metal with only a single coat. The search for an effective waterborne technology for air-dry application direct to metal in one coat has been a target for dispersion manufacturers for many years. This looks like a real breakthrough, providing an environmentally friendly solution to a very technically challenging problem. Well done, Monsieur Delmas!

Kurt Wood and his co-authors, also from Arkema present in their paper a highly weatherable 2 K urethane topcoat formulations based on hydroxyfunctional PVDF-arcylic hybrid emulsion polymers crosslinked with water-dispersible polyisocyanantes. These coatings adhere strongly to pultruded (reinforced plastic composites) substrates without a primer coat. With this kind of coating less material is needed and costs are also lower, because neither pretreatment nor primer is required any more. Also a groundbreaking innovation!

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Sonja Schulte
European Coatings Journal
Sonja Schulte
Editor-in-Chief, Science & Technology
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