Patent ID: 8487071

Claim:
A polyether polymer comprising polymerization units represented by the following formula [1]: wherein, regarding R 1 , (1) R 1 is a group of a mono-cyclic structure having a cyclic skeleton containing 6 to 20 atoms, two or more of which are carbon atoms, or is a group of a structure formed by a mutual linking of plurality of a mono-cyclic structure having a cyclic skeleton containing 3 to 20 atoms, two or more of which are carbon atoms, (2) two carbon atoms, which are contained in one or more of the cyclic skeletons of R 1 , and do not exist next to each other, make a bond to an oxygen atom of an ether bond in a main chain next to R 1 , respectively, (3) when an oxygen atom exists in one or more of the cyclic skeletons of R 1 , said oxygen atom makes no bond to any of the above two carbon atoms mentioned in (2), and (4) two atoms, which are contained in one or more of the cyclic skeletons of R 1 , and do not exist next to each other, may make a bond to each other directly or through an atom or an atomic group; and R 2 is an aliphatic hydrocarbyl group having 2 to 20 carbon atoms, an alicyclic hydrocarbyl group having 4 to 20 carbon atoms, or an aromatic hydrocarbyl group having 6 to 30 carbon atoms, excluding a 2,2-diphenylpropane-4,4′-diyl group; and wherein the polyether polymer has a primary structure which is formed by alternate linking of a divalent group of R 1 with a divalent group of R 2 through an ether bond.