Patent ID: 7528215

Claim:
An aliphatic polymer having a ketone group and ether bonding in its main chain, comprising a structural unit represented by the following Formula (1) and a structural unit represented by the following Formula (2), wherein Ra and Rb each independently represents a substituted or unsubstituted divalent aliphatic hydrocarbon group; Rc represents a substituted or unsubstituted divalent aliphatic hydrocarbon group having an ether bonding in a terminal group thereof, or a single bond; n1 represents an integer of 1 or more; n2 represents an integer of 0 or more; n1+n2 represents an integer in a range of 2 to 1000; and the terminal group is selected from the group consisting of —OH, —COOH, —COOR, —COX, —NH 2 and —NCO, wherein R represents a substituted or unsubstituted hydrocarbon group, and X represents a halogen atom.