Synthesis of New Vinylidene Fluoride-Containing Acrylic Monomers and their Use as Surface Modifiers in Photopolymerized Coatings

摘要

The syntheses of original acrylic monomers containing vinylidene fluoride units, prepared through a four step process starting from the telomerization of VDF with iodotrifluorometane, are presented. The VDF monomers were added in low amount (0-1% w/w) into a reference acrylic resin and copolymerised through the UV-curing technique. The kinetics of the photopolymerization, monitored by IR spectroscopy, and the bulk properties of the film were independent of the additive, but peculiar surface properties were shown. A low concentration of the VDF monomers made the surface both hydrophobic and oleophobic. The surface modification concerned selectively one side of the films: the film coated on a polar surface showed on the air side a lower surface tension, while the substrate side kept the same properties as those of the pure hydrogenated resin, including a good adhesion to the substrate.