METHOD FOR PREPARING URETHANE METHACRYLATE RESIN

摘要

The present invention relates to a method for the preparation of an urethane methacrylate resin composition comprising (a) urethane methacrylate resin, (b) reactive diluent and (c) a transition metal compound as accelerator, wherein the method comprises (1) preparing an urethane methacrylate resin by reacting at least a hydroxyl functional methacrylate and an isocyanate and optionally other alcohols in the presence of a reaction catalyst, whereby a secondary hydroxyalkyl methacrylate is used as methacrylate, and the isocyanate is an aromatic and/or aliphatic di- and tri- isocyanate; (2) adding reactive diluent to the urethane methacrylate resin during and/or after its preparation, and (3) adding at least one transition metal compound to the urethane methacrylate resin, wherein a zirconium alkoxide and/or zirconium carboxylate is used as reaction catalyst and a Co, Cu, Mn and/or Fe compound is used as transition metal compound.