Method for manufacturing stabilized polyacetal resin, stabilized polyacetal resin, stabilized polyacetal resin composition, and molded article of stabilized polyacetal resin
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United States of America Patent
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Issued Date -
Nov 6, 2008
app pub date -
Jun 6, 2007
filing date -
Jun 13, 2006
priority date (Note) -
Abandoned
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Abstract
The present invention provides an agent to decompose instable terminal group, which is effective in a small adding amount, which sufficiently decreases the quantity of residual instable 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 instable terminal group in the presence of an agent to decompose the instable terminal group, which agent is composed of a heterocyclic quaternary ammonium salt, thus decreasing the quantity of the instable terminal group.
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