| abstract |
PURPOSE: To obtain the titled polymer having transparency and improved heat and chemical resistance, etc., by continuously copolymerizing ethylene with a cyclic olefin in a hydrocarbon based solvent containing a catalyst consisting of a soluble V compound and organoaluminum compound kept under specific conditions. n CONSTITUTION: Ethylene is continuously copolymerized with a cyclic olefin expressed by formula I or II (n and m are positive numbers; l is ≥3; R 1 WR 10 are H, halogen or hydrocarbon) in the presence of a catalyst consisting of a soluble vanadium compound, e.g. VO(OC 2 H 5 )Cl 2 and an organoaluminum compound, e.g. ethylaluminum sesquichloride, existing to keep ≥2, preferably 3W20 ratio (Al/V) of the vanadium atom to the aluminum atom in a hydrocarbon based solvent, e.g. toluene, in the polymerization system preferably at -20W+60°C to afford the aimed copolymer. n COPYRIGHT: (C)1986,JPO&Japio |