公开(公告)号：JPH01263121A

公开(公告)日：1989-10-19

申请号：JP9195588

申请日：1988-04-14

Applicant: DAICEL CHEM

Inventor： YAMATO TSUTOMU ,  KONDO MASAYOSHI

IPC: C08G65/46 ,  C08G85/00

Abstract: PURPOSE:To efficiently provide the subject polymer having good heat resistance, moisture absorbing property and weather resistance, by grinding an aromatic polymer mixture in a non-solvent and heating the ground polymer mixture under reduced pressure at a temperature between the glass transition temperature, etc., of the polymer and the vapor pressure temperature of a reaction solvent to remove the non-solvent and the solvent. CONSTITUTION:4,4-Dihydroxydiphenyl sulfone, etc., is polycondensated with 4,4'-dichlorodiphenyl sulfone, etc., in the presence of potassium carbonate in a reaction solvent such as tetramethylene sulfone at 225 deg.C to provide an aromatic polymer such as an aromatic polyether sulfone. The resultant aromatic polymer mixture is ground in a non-solvent such as methanol and subsequently heated under reduced pressures within an operative temperature range 3 lower than the glass transition temperature 1 or melting point of the aromatic polymer mixture and higher than the temperature of the vapor pressure 2 of the reaction solvent to distill of the non-solvent and the reaction solvent, thereby purifying the aromatic polymer.