| 摘要 |
Polyurethane acrylate-type compositions which can be cross-linked with ionizing radiation to form coatings on metal or metallized surfaces, said compositions being obtained by mixing two liquid and/or pasty phases, of which the first (A) contains polyols and the second (B) polyisocyanates, and characterized in that they mainly comprise the following as dry materials: in phase (A): A1) at least one hydroxylated vinyl polymer and/or copolymer; A2) at least one acrylic monomer having at least two ethylene functions; A3) at least one acidic acrylic derivative; A4) at least one cross-linking initiating agent. In phase (B): B1) at least one polyisocyanate. Once they have been cross-linked by ionizing radiation, these compositions have remarkable properties such as excellent adhesion on metal and/or metallized surfaces without the need for an adhesive underlayer and with complete immunity to moist and/or alcohol atmospheres. |
