Method for producing polyether nitrile

Abstract

A method for producing a polyether nitrile includes allowing an aromatic dihydroxy compound composition (I) and a dihalobenzonitrile compound composition (II) to undergo a polycondensation reaction in the presence of a basic compound. In the method, the aromatic dihydroxy compound composition (I) includes an aromatic dihydroxy compound (I-a) and an aromatic monohydroxy compound (I-b), and contains (I-a) in an amount ranging from 99.0 to 99.995 mol % and (I-b) in an amount ranging from 1 to 0.005 mol % relative to a total amount of (I-a) and (I-b), and the dihalobenzonitrile compound composition (II) includes a dihalobenzonitrile compound (II-a) and a monohalobenzonitrile compound (II-b), and contains (II-a) in an amount ranging from 99.0 to 99.995 mol % and (II-b) in an amount ranging from 1 to 0.005 mol % relative to a total amount of (II-a) and (II-b).

Dependencies are inferred from the claim text.