Patent ID: 6992165
Filing Date: 2006-01-31
Classification: C08G

Abstract:
1. A method for making an amine-terminated polyarylene polyether comprising the steps of: forming a liquid/solid slurry reaction mixture in an oxygen-free atmosphere, said reaction mixture consisting essentially of a dihydroxyaromatic compound, a dihaloaromatic compound, an amino-hydroxyaromatic compound, a weak base, an aprotic polar solvent and a non-aromatic azeotrope former which has from 6 to 10 carbon atoms and is substantially non-miscible with the aprotic polar solvent; heating said liquid/solid slurry reaction mixture to an elevated temperature that is sufficient to form a heated reaction mixture and a vapor mixture consisting essentially of said aprotic polar solvent, water, and said non-aromatic azeotrope former; separating said vapor mixture from said heated reaction mixture; replenishing said heated reaction mixture with said non-aromatic azeotrope former: maintaining said heated reaction mixture at said elevated temperature for a time that is sufficient to form a product mixture that comprises said amine-terminated polyarylene polyether, said aprotic polar solvent and said non-aromatic azeotrope former; separating said non-aromatic azeotrope former and any solid salts from said product mixture to provide a solution of said amine-terminated polyarylene polyether in said aprotic polar solvent.