Cyclic olefin copolymer composition and cross-linked product thereof

A cyclic olefin copolymer composition comprising:

• a cyclic olefin copolymer (m);
• and
• a cyclic olefin copolymer (n) different from the cyclic olefin copolymer (m),
• wherein the cyclic olefin copolymer (m) includes
• (A) a repeating unit derived from one or more olefins represented by General Formula (I),
• (B) a repeating unit derived from one or more cyclic non-conjugated dienes represented by General Formula (III), and
• (C) a repeating unit derived from one or more cyclic olefins represented by General Formula (V),
• when a total molar number of the repeating units in the cyclic olefin copolymer (m) is 100 mol %, a content of the repeating unit (A) derived from the olefins is 10 mol % or more to 90 mol % or less, a content of the repeating unit (B) derived from the cyclic non-conjugated dienes is 1 mol % or more to 40 mol % or less, and a content of the repeating unit (C) derived from the cyclic olefins is 1 mol % or more to 30 mol % or less,
• the cyclic olefin copolymer (n) includes at least one selected from a copolymer (n1) of ethylene or α-olefin and cyclic olefin (where the copolymer (n1) does not include a repeating unit derived from cyclic non-conjugated dienes represented by General Formula (III) and a cyclic olefin ring-opening polymer (n2), and
• when a total amount of the cyclic olefin copolymer (m) and the cyclic olefin copolymer (n) is 100% by mass, a content of the cyclic olefin copolymer (m) is 5% by mass or more to 95% by mass or less, and a content of the cyclic olefin copolymer (n) is 5% by mass or more to 95% by mass or less
• (in General Formula (I), R300 indicates a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms)
• (in General Formula (III), u is 0 or 1, v is 0 or a positive integer, w is 0 or 1, R61 to R76 and Ra1 and Rb1, which may be the same or different, are a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms, R104 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, t is a positive integer of 0 to 10, and R75 and R76 may bond with each other to form a monocyclic or polycyclic ring)
• (in General Formula (V), u is 0 or 1, v is 0 or a positive integer, w is 0 or 1, R61 to R78 and Ra1 and Rb1, which may be the same or different, are a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms, and R75 to R78 may bond with each other to form a monocyclic or polycyclic ring).