Method for producing polyacetal copolymer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 29, 2017
Issued Date -
N/A
app pub date -
Dec 10, 2014
filing date -
Mar 31, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A high-quality polyacetal produced by a process including supplying a raw material comprising trioxane, a comonomer capable of copolymerizing with trioxane and a non-volatile protonic acid to a reactor of a continuous stirring/mixing machine type; carrying out a polymerization reaction of the raw material to produce a reaction mixture; vaporizing an unreacted monomer to separate the unreacted monomer from the reaction mixture and supplying the unreacted monomer to the raw material supplying; collecting a polyacetal copolymer from the reaction mixture into a collection unit which is arranged downstream from a discharge port and is adjusted to have a gauge pressure of 0.2 kPa or more; and adding a basic compound to the collected polyacetal and then subjecting the resultant mixture to a melt-kneading treatment to deactivate the non-volatile protonic acid.
First Claim
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International Classification(s)
- 2014 Application Filing Year
- C08G Class
- 2377 Applications Filed
- 2099 Patents Issued To-Date
- 88.31 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C08G Class
- 33.97 % this patent is cited more than
- 8 Age
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