| 摘要 |
<p>Curable coating agents, a process for the production of scratch-resistant coatings on plastics, and articles coated by this process. The coating agents are polycondensates of a reaction product, containing two or more carbon-carbon double bonds and one or more hydroxyl or alkoxy groups per molecule, obtained from an olefinically unsaturated silane containing 2 or more hydroxyl or alkoxy groups, whose olefinically unsaturated organic radical is bonded via a C-Si bond, and a hydroxyl-containing alpha , beta -olefinically unsaturated monomer, an olefinically unsaturated silane of the general formula R1-Si(OR2)3 where R1 is a vinyl radical or an alkyl acrylate or alkyl methacrylate radical bonded to the Si atom via a C-Si bond and R2 is hydrogen or a saturated hydrocarbon radical, and a saturated silane of the general formula <IMAGE> where R3 and R4 are saturated or aromatic hydrocarbon radicals, with or without an epoxide-containing silane which also contains hydroxyl or alkoxy groups; the polycondensate may additionally contain an olefinically unsaturated reaction product of acrylic or methacrylic acid and a polyalcohol or polyether-ol. The coating agent is used to produce scratch-resistant coatings on the surface of plastics.</p> |
