Environmentally Friendly Coating Resists Icing and Marine Fouling (RFT-496)
Scientists at NDSU have developed a siloxane-modified polyurethane coating that confers both anti-icing and anti-fouling capabilities. Potential applications include marine and freshwater anti-fouling coatings, and a wide range of coatings where resistance to icing has value. The coating uses an amphiphilic compound, hydrophilic polyethylene glycol (PEG) and hydrophobic polydimethyl siloxane (PDMS), to provide excellent performance in addition to environmental benefits. With respect to anti-fouling coatings, this polyurethane provides superior fouling release and durability compared with silicone elastomers.
- Comparable fouling release properties to industry standard
- Mechanical performance significantly improved over silicone elastomers
- Excellent adhesion eliminates the need for a separate tie-coat
- Anti-icing performance on marine, airborne, and land-based surfaces
The technology includes curable polyurethane coating compositions having particular isocyanate, hydroxyl, PDMS, and PEG content as well as the processes of coating a surface and curing the coating. A prepolymer (see figure) is first synthesized from polyisocyanate, PDMS, and PEG. The prepolymer is then reacted with a polyol and polyisocyanate crosslinker to produce the complete AF coating.
This technology is patent pending in the U.S. and is available for licensing/partnering opportunities.
Henry Nowak, Technology Manager
RFT, 496, RFT496
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