| 摘要 |
A process for the production of cycloolefin polymers by the polymerization of cycloolefins in solution in inert organic solvents, using catalysts of tungsten salts and organic aluminum compounds, characterized in that an organic cycloolefin solution having a water content of 5 to 50 ppm, preferably 10 to 20 ppm, is used for the polymerization.
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