| 摘要 |
<p>To recover an epoxidized block copolymer from an epoxidation reaction liquid, this reaction liquid is supplied to a stirring film type evaporator, preferably to an evaporator constructed to have a concentrate discharge outlet through which a concentrate is forcibly discharged, wherein the reaction liquid is concentrated by evaporating an organic solvent contained therein, followed by removal of the organic solvent from the resulting concentrate with use of a biaxial vented extruder, and thus, an epoxidized block copolymer is producible with a low level of heat deterioration, a low content of an organic solvent residue and a low content of gels, especially of 200 mesh-on gels. <IMAGE></p> |
