UV-Curable Low Surface Energy Coatings for Fouling Release and Anti-Graffiti Applications (RFT-254)
Scientists at NDSU have invented a novel polyester composition that is UV-curable and exhibits low surface energy. The composition contains polydimethuylsiloxane (PDMS) and involves mixing polyesters with co-reactants and photoinitiators, and curing the compounds using either visible of ultraviolet (UV) light.
These coatings are useful in applications where low surface energy is desired such as marine ship hulls, anti-graffiti surfaces, release coatings, and protective wood coatings with easily cleanable surfaces.
- Coatings are solvent, water, and acrylate free, eliminating health hazards associated with acrylates.
- Low cost of manufacturing due to low levels of siloxane used.
- Does not suffer from oxygen inhibition.
This invention relates to the synthesis of siloxane-modified unsaturated polyester oligomers, blending the oligomers with vinyl ethers and a photoinitiator, and curing the formulation to form a coating that has low surface energy. A monohydroxy, a telechelic, and a dihydroxy terminated PDMS is used for unsaturated polyester synthesis, which is then UV-cured with triethyleneglycol divinylether as the reactive diluent. These coatings are solvent-free and can be crosslinked within a few minutes.
This technology is the subject of issued US patent 8,703,838 and is available for
Henry Nowak, Technology Manager
NDSURF Tech Key
RFT, 254, RFT254
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