| 摘要 |
<p>A hybrid thermosetting material composition useful as, e.g., an automotive body sealer in automotive body assembly lines; and a method of preventing the foaming occurring during sealing in the assembly lines. The composition is characterized by comprising: a plastisol material comprising thermoplastic resin particles and a plasticizer; a blocked urethane prepolymer obtained by blocking the free isocyanate groups of an isocyanate-terminated urethane prepolymer; and a hardener therefor. The method of foaming prevention is characterized by comprising applying the hybrid thermosetting material composition, subsequently heating the coating to cause the plastisol material to gel during heating from 60 to 100°C, and then further heating it to 100°C or higher to thermally cure the blocked urethane prepolymer.</p> |
