Patent ID: 7291679

Claim:
A polymer represented by Structural Formula (1): [—P 1 —R—] n (1), wherein P 1 is an addition polymer moiety having a continuous hydrocarbon skeleton containing no condensation system and formed by addition polymerization of one or more monomers having a double bond; R is a linking moiety selected from the group consisting of —CONH—, —NH—CO—O—, —NH—CO—NH— and —X 1 —A—X 2 —, wherein X 1 and X 2 are independently selected from the group consisting of —CONH—, —NH—CO—O— and —NH—CO—NH—, and A is an atomic group capable of linking with X 1 and X 2 ; and n is a number of repeating units and is an integer of 2 or more, and wherein linkage sites of R represented by a bond between P 1 and R in the repeating unit of the Structural Formula (1) are different between adjacent repeating units.