| 摘要 |
<p>A thermosettable in-mold exterior gel coat composition exhibiting low or no volatile organic content for use with molded plastic substrates, includes fiber reinforced substrates. The gel coat composition is composed of an ethynically unsaturated polyester resin and utilizes as a co-polymerizable reactive diluent therein an acrylate or methacrylate ester component having from 2 to 4 carbon atom alkyl substituent radicals depending thereon, coupled with a 5 to 10 carbon-atom-containing mono or dicyclic alkyl or alkenyl ester radical, and carrying in turn one or more optional alkyl substituents of from about 1 to 3 carbon atoms. In a process for the application of the exterior gel coat to molded plastic substrates, including fiber reinforced substrates, the substrate is applied to said gel coat while it is in a tacky state of only partial cure so as to achieve a bonding between the substrate and the gel coat.</p> |
