| 摘要 |
<p>Polymerization of a cycloolefin monomer, containing a norbornene group, to a rigid molded product is conducted in the presence of a halogen-free metathesis catalyst, a halogen-free alkylaluminum cocatalyst, and a halogen-free modifier compound selected from alkyltin oxide compounds and hindered phenols. Such polymerization can also be accomplished in absence of the alkyltin oxide compound but in presence of the hindered phenol. The monomer charge is liquid or fluid at room temperature but is initiated and polymerization is carried out at an elevated temperature of 50 to 200 DEG C.</p> |
