| 摘要 |
PROBLEM TO BE SOLVED: To provide a method eapable of suppressing a thermal deterioration by adhesive materials that adhere to the inner wall in a gas phase part of a reactor, or diminishing a thermal hysteresis in copolymerizing, when carrying out a middle- and later-term copolymerizing process for a polyamide using a continuous polymerizing apparatus. SOLUTION: A polyamide resin in a molten state, which is obtained from a diamine, wherein a total of xylidenediamine and bisaminomethylcyclohexane is 70 mol% or above, and a dicarboxylic acid, is continuously copolymerized in a reactor of a continuous copolymerizing apparatus for the polyamide resin. This horizontal continuous copolymerizing apparatus has a horizontal cylindrical reactor, a heating-jacket arranged in a peripheral reactor, an inlet arranged at a lower or side part in an end of the reactor, an outlet arranged at the lower or side part in another end of the reactor, a gas-exhausting part arranged at the upper part of the reactor, a rotating-shaft installed in both sides of the reactor and arranged along an axis-line of the reactor, and a plurality of agitating-blades attached to the rotating-shaft and arranged in the inner part of the reactor, wherein the heating-jacket is divided in plural sections.
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