| abstract |
(57) Abstract: Cyclic olefin copolymer excellent in moldability and heat resistance and production thereof-Patent application Units of a and b units of the formula (III) and a / (a + A copolymer of a cyclic olefin and an α-olefin is produced by a catalyst composed of an organoaluminum oxy compound whose b) is 0.10 to 0.90. (I) CpMA m-1 [Cp: cyclopentadienyl, etc. A: halogen, hydrogen, hydrocarbon group, amide group, etc., M: 4 Group or Group 5 transition metal, valence of m: M] |