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Sunday, 15 September 2019
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Raw materials & technologies, Technologies, UV/EB Coatings

UV-curable polyurethane acrylates inhibit fouling

Monday, 17 March 2014

A study examined the effect of UV-curable fluorinated polyurethane acrylates for use as antifouling coating materials.

THe new UV-curable coating prevents fouling

THe new UV-curable coating prevents fouling

Researchers from Pusan National University, Korea, prepared a series of UV-curable polyurethane acrylates from a reactive oligomer [4,4 ́-dicyclohexymethanediisocyanate(H12MDI)/poly(tetramethylene glycol)(PTMG)/2-hydroxyethyl methacrylate (HEMA)] and diluents [methyl methacrylate (MMA)/isobornyl acrylate (IBOA)/heptadecafluorodecyl methacrylate (PFA)]. They examined the effect of PFA/IBOA weight ratio on the properties of the polyurethane acrylates.

PFA increases antifouling properties

The prepared UV-curable coating material containing a 15 wt% PFA content in diluents (MMA/IBOA/PFA) form a heterogeneous mixture, indicating that a PFA content of approximately 15 wt% was beyond the limit of the dilution capacity of diluents for the oligomer. In the wavelength range of 400-800 nm, the UV-cured PUA0 film sample was quite transparent (transmittance%: near 100%). On the other hand, the transmittance% of the FPUA film sample decreased markedly with increasing PFA content. XPS showed that the film-air surface of the UV-cured polyurethane acrylate film had a higher fluorine content than the film-glass dish interface. As the PFA content increased from 0 to 12 wt%, the surface tension of the UV-cured urethane acrylates decreased from 26.8 to 15.6mN/m, whereas the water/methylene iodide contact angles of the film-air surface increased from 90.1/63.6° to 120.9/87.1°. These results suggest that the UV-curable polyurethane acrylates containing a PFA content up to 12 wt% have strong potential as fouling-release coating materials.

The study is published in: Journal of Applied Polymer Science 2014, 131, 40603.

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