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Improvement of Weather Resistance for Epoxy Based Coatings on Marine Structures

Epoxy-based coating used in the ships and marine structures can be quickly degraded after only a short period of exterior exposure. The weathering defects such as discoloration, chalking and gloss reduction are originated from a photo-oxidation of aromatic group in the epoxy resin under the UV light. Weather resistance coatings such as polyurethane and polysiloxane require more work due to the short over-coating interval and low compatibility with primer coating layers. 

Product Number: 51216-008-SG
Author: Sang-Moon Shin, Chung-Seo Park, Seung-Gon Choo, Sang-Sik Park, Kyoung-Sub Hwang
Publication Date: 2016
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Epoxy-based coating used in the ships and marine structures can be quickly degraded after only a short period of exterior exposure. The weathering defects such as discoloration, chalking and gloss reduction are originated from a photo-oxidation of aromatic group in the epoxy resin under the UV light. Weather resistance coatings such as polyurethane and polysiloxane require more work due to the short over-coating interval and low compatibility with primer coating layers. Fatty acid modified epoxy is known for weather resistant coatings to substitute the urethane and polysiloxane coatings. In this study, the effects of the fatty acid content on the weather resistance and coating performance were evaluated. Weather resistance characteristics were also validated by difference of coating colors to develop the UV durable epoxy coatings with a corrosion resistance.

Epoxy-based coating used in the ships and marine structures can be quickly degraded after only a short period of exterior exposure. The weathering defects such as discoloration, chalking and gloss reduction are originated from a photo-oxidation of aromatic group in the epoxy resin under the UV light. Weather resistance coatings such as polyurethane and polysiloxane require more work due to the short over-coating interval and low compatibility with primer coating layers. Fatty acid modified epoxy is known for weather resistant coatings to substitute the urethane and polysiloxane coatings. In this study, the effects of the fatty acid content on the weather resistance and coating performance were evaluated. Weather resistance characteristics were also validated by difference of coating colors to develop the UV durable epoxy coatings with a corrosion resistance.

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