摘要 |
PURPOSE:To obtain the titled highly active monomer without purification on purpose, capable of giving thermosetting resins having high heat distortion temperature, etc. when subjected to reaction injection molding, by heat treatment of a dicyclopentadiene at specified temperatures. CONSTITUTION:A dicyclopentadiene is heat-treated, pref. in the presence of 100-1,000ppm of an antioxidant (e.g., 4,4-dioxydiphenyl), followed by, if required, mixing a norbornene monomer, thus obtaining the objective monomer.
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