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Self-Stratifying Environmentally Friendly Alkyd Coatings

Self-Stratifying Environmentally Friendly Alkyd Coatings
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The current process for coating large metal substrates, such as the decks of naval ships, requires pretreatment, primer, and topcoat steps. Developing a coating that can combine these steps into one would significantly reduce the labor costs and application time, which are significantly more expensive than the coating itself. This research shows the development of a self-stratifying alkyd coating. 

Product Number: 51216-005-SG
Author: Ryan R. Salata, Mark D. Soucek.
Publication Date: 2016
Industries: Coatings , Coatings and Linings
$0.00
$20.00
$20.00

The current process for coating large metal substrates, such as the decks of naval ships, requires pretreatment, primer, and topcoat steps. Developing a coating that can combine these steps into one would significantly reduce the labor costs and application time, which are significantly more expensive than the coating itself. This research shows the development of a self-stratifying alkyd coating. Alkyd resins are polyesters modified with monobasic fatty acids from renewable seed oils such as tung, linseed, and soybean oil. The major drawbacks of durability, pH sensitivity, and a slow autoxidative curing mechanism will be targeted to engineer a fast curing, environmentally friendly, high performance coating. It is proposed that partial self-stratification is driven by three mechanisms; the semi-incompatibility of the two alkyds as the solvent evaporates, the low surface energy of fluorine modified alkyds, and the propensity for siloxane modified alkyds to hydrolyze with moisture on the substrate surface.

The current process for coating large metal substrates, such as the decks of naval ships, requires pretreatment, primer, and topcoat steps. Developing a coating that can combine these steps into one would significantly reduce the labor costs and application time, which are significantly more expensive than the coating itself. This research shows the development of a self-stratifying alkyd coating. Alkyd resins are polyesters modified with monobasic fatty acids from renewable seed oils such as tung, linseed, and soybean oil. The major drawbacks of durability, pH sensitivity, and a slow autoxidative curing mechanism will be targeted to engineer a fast curing, environmentally friendly, high performance coating. It is proposed that partial self-stratification is driven by three mechanisms; the semi-incompatibility of the two alkyds as the solvent evaporates, the low surface energy of fluorine modified alkyds, and the propensity for siloxane modified alkyds to hydrolyze with moisture on the substrate surface.

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