| 摘要 |
<p>An improved UV stabilized primer composition for providing an acrylic primer layer between a silicone top coat and a thermoplastic substrate, has been found to impart improved weathering resistance to silicone-coated thermoplastic articles. The primer composition includes respective amounts of 2-(2 min -hydroxy-5 min -t-octylphenyl)benzotriazole and nickel dibutyldithiocarbamate. The presence of nickel dibutyldithiocarbamate in the primer composition reduces the tendency of the 2-(2 min -hydroxy-5 min -t-octylphenyl)benzotriazole to crystallize during drying of the primer layer prior to top coating with the silicone hardcoat, as well as enhancing the UV protection of the system.</p> |
