| 摘要 |
PURPOSE:To obtain the titled polymer having high polymerization degree in a short time, without causing gelation, discoloration and increase in haze, by the polycondensation of a polyamide-forming component with a polyether ester-forming component in the presence of a specific tin compound. CONSTITUTION:The objective polymer can be produced by carrying out the polycondensation reaction of (A) a polyamide-forming component selected from lactam, aminocarboxylic acid and a salt of essentially equivalent diamine and dicarboxylic acid with (B) a polyether ester-forming component comprising essentially equivalent dicarboxylic acid and poly(alkylene oxide) glycol, in molten state, in the presence of (C) a monoalkyl tin compound or monoaryl tin compound. The amount of the tin compound is 0.005-0.5wt%, preferably 0.01- 0.2wt% in terms of tin atom based on the polyether ester amide.
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