| abstract |
PROBLEM TO BE SOLVED: To remove inorganic components, particularly alkali components, which cause defects (for example, minute scratches, white spots, etc.) due to decomposition during steam treatment (sterilization), etc. from a polymer and to reduce defects. polymer. SOLUTION: A method for treating a polymer solution in an organic solvent containing alkaline impurities, which comprises uniformly acidifying an organic phase using an acidic compound soluble in the organic phase, and a polymer obtained by the method. |