| abstract |
Method of preparing urethane based fluorinated monomers comprising (i) reacting a fluorinated alcohol and an isocyanate functional non-fluorinated monomer or (ii) reacting in one or two steps a fluorinated alcohol, a polyisocyanate and an isocyanate reactive non-fluorinated monomer, wherein reactions (i) and (ii) are carried out in the presence of one or more reactive diluents, the reactive diluents having an ethylenically unsaturated group and being free of isocyanate reactive groups. The method does not require an inert organic solvent as a reaction medium, thus excluding volatile organic compounds (VOC's). The resulting compositions can be readily and conveniently used to prepare radiation curable coating compositions without the need to remove organic solvent from the composition. |