Bio-based oligomers for hydrophobic organic-inorganic hybrid topcoats with multiple cure options

A study is underway to develop 100% solid organic-inorganic hybrid (OIH) coatings that are VOC-free and partially based on bio-renewable materials. The research focuses on the synthesis of multifunctional silane precursors from renewable sources that can be successfully used in coatings to achieve enhanced hydrophobicity and a robust siloxane network. These coatings, derived from both bio-based and petroleum-based sources, provide exceptional curing capability that includes UV, thermal and room temperature cures.

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Durability and sustainability of OIH coatings

The coated materials show outstanding resistance to water permeability and corrosion. In particular, UV- and thermally cured coatings have been found to have exceptional durability, while room-temperature and double-cured coatings have achieved very good flexibility and hardness, albeit with slightly higher susceptibility to corrosive environmental influences.

These versatile OIH coatings could prove to be a sustainable solution for a wide range of applications, from interior wood coatings to exterior coatings and clear coats. The use of bio-resources could represent a significant step towards sustainability in various industries, including automotive and construction.

Source: Progress in Organic Coatings Volume 190, May 2024, 108358