Patent ID: 7160950

Claim:
A modified olefin-based copolymer produced by a process comprising graft-polymerizing an alkenyl aromatic hydrocarbon and/or an unsaturated carboxylic acid or derivative thereof to an olefin-based copolymer containing repeating units derived from a linear α-olefin having 3 to 20 carbon atoms and/or ethylene as an olefin and repeating units derived from vinylcyclohexane, wherein contents of the repeating units derived from the olefin and the repeating units derived from vinylcyclohexane are respectively 20 to 99 mol% and 1 to 80 mol% based on 100 mol% of the total monomer units constituting the olefin-based copolymer, an amount of the alkenyl aromatic hydrocarbon and/or the unsaturated carboxylic acid or derivative thereof is 0.05 to 10% by weight based on the modified olefin-based copolymer.