| 摘要 |
Disclosed is a cyclic olefin addition copolymer having a structural unit (1) derived from a cyclic olefin compound having an alkyl group with 4 carbon atoms as a substituent, a structural unit (2) derived from a cyclic olefin compound having an alkyl group with 5-12 carbon atoms as a substituent, and if necessary, a structural unit (3) derived from another cyclic olefin compound. The novel cyclic olefin addition copolymer is excellent in melt moldability, transparency and heat resistance, while being low in water absorption, dielectric constant and metal content. Consequently, the cyclic olefin addition copolymer can be suitably used for optical components such as optical films. Also disclosed is a method for producing a cyclic olefin addition copolymer which enables to produce the cyclic olefin addition copolymer at high yield, while using a small amount of a catalyst.
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