| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for stably preparing cyclic olefin polymers showing same physical properties at a high polymerization rate, wherein properties such as molecular weight do not vary between different lots. SOLUTION: Indenes with a purity of 90 wt.% or higher are fused with cyclopentadienes with a purity of 90% or higher to obtain 1,4-methanol-1,4,4a, 9a-tetrahydrofluorenes, having the Hasen unit color number of at most 50, which are subsequently polymerized and, if required, hydrogenated to obtain the cyclic olefin polymers. COPYRIGHT: (C)2007,JPO&INPIT
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