| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a mixture containing block copolymers or hydrogenation products thereof by which little gel is formed in a pellet, excellent color and transparency are provided, a small amount of a solvent is left, and excellent homogeneous mixing of several components having different compositions is achieved. SOLUTION: The method for producing the mixture containing the block copolymers comprising several components having specific structures or the hydrogenated products thereof includes (a) a step for individually polymerizing each component, (b) a step for adding a reaction-terminator, (c) a step for regulating the pH of the solution, (d) a step for simultaneously feeding and mixing the solutions with a specified phenol-based stabilizer by using a continuous mixer installed in the midway of piping, and (e) a step for removing the solvent by steam stripping. COPYRIGHT: (C)2009,JPO&INPIT |
