| 摘要 |
<p>The present invention relates to a process for preparing isobutene-cyclodiene copolymers having a number-average molecular weight of at least 100,000 and an unsaturation of 1 ∩ 30 % by mol, characterized in that polymerization is carried out without gelation by reacting 75 ∩ 99.5 % by weight of an isobutene and 0.5 ∩ 25 % by weight of a cyclodiene or a mixture of cyclodiene as reaction materials, in a polar reaction solvent of 1 ∩ 10 times by weight with respect to the reaction materials, wherein a catalyst solution of 0.02 ∩ 2 % by weight in the polar solvent is used in the amount of 0.2 ∩ 2 times by weight with respect to the reaction materials, at a reaction temperature of -100 ∩ -85 °C, thereby obtaining a copolymer, and then removing the residual catalyst activity at a temperature of -100 ∩ -25 °C.</p> |
