Method for manufacturing stabilized polyacetal resin, stabilized polyacetal resin, stabilized polyacetal resin composition, and molded article of stabilized polyacetal resin
申请人:Polyplastics Co., Ltd.
公开号:EP1867667A1
公开(公告)日:2007-12-19
The present invention provides an agent to decompose unstable terminal group, which is effective in a small adding amount, which sufficiently decreases the quantity of residual unstable terminal group, and which generates very little limitation on the treatment method, the apparatus, and the use amount of the agent. Specifically, it provides a method for manufacturing stabilized polyacetal resin having the step of applying heat treatment to a polyacetal resin having an unstable terminal group in the presence of an agent to decompose the unstable terminal group, which agent is composed of a heterocyclic quaternary ammonium salt, thus decreasing the quantity of the unstable terminal group.
本发明提供了一种分解不稳定末端基团的药剂,其添加量小,效果好,能充分减少残留的不稳定末端基团的数量,并且对处理方法、装置和药剂的使用量限制很小。具体地说,它提供了一种制造稳定聚缩醛树脂的方法,该方法的步骤是:在有药剂存在的情况下,对具有不稳定末端基团的聚缩醛树脂进行热处理,以分解不稳定末端基团,该药剂由杂环季铵盐组成,从而减少不稳定末端基团的数量。