Patent ID: 7393907

Claim:
A polar group-containing olefin copolymer comprising a constituent unit represented by the following formula (1), a constituent unit represented by the following formula (2) and a constituent unit represented by the following formula (3), having a molecular weight distribution (Mw/Mn) of not more than 3, and having an intensity ratio of Tαβ to Tαα (Tαβ/Tαα), as determined from a 13 C-NMR spectrum of said copolymer, of not more than 1.0: wherein R 1 and R 2 may be the same or different and are each a hydrogen atom or a straight-chain or branched aliphatic hydrocarbon group of 1 to 18 carbon atoms; R 3 is a straight chain hydrocarbon group of 11 or more carbon atoms; R 4 is a hetero atom or a group containing a hetero atom; r is 0 or 1; X is a polar group selected from an alcoholic hydroxyl group, a phenolic hydroxyl group, a carboxylic acid group, a carboxylic acid ester group, an acid anhydride group, an amino group, an amide group, an epoxy group and a mercapto group; p is an integer of 1 to 3; and when p is 2 or 3, each X may be the same or different, and in this case, if r is 0, X may be bonded to the same or different atom of R 3 , and if r is 1, X may be bonded to the same or different atom of R 4 .