PROCESS FOR PRODUCING OXYMETHYLENE COPOLYMER
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United States of America Patent
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Jul 9, 2020
app pub date -
Mar 13, 2017
filing date -
Mar 14, 2016
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Abstract
The present invention is to provide a process for producing an oxymethylene copolymer, in which deteriorate due to oxidation hardly occurs, an amount of formaldehyde generated from the product when stored for a long time under environment of high temperature and high humidity is reduced, and occurrence of mold deposit during molding is small. A process for producing an oxymethylene copolymer includes
- Step 1 of polymerizing polymer raw materials containing trioxane and a comonomer in the presence of a specific amount of an acid catalyst,Step 2 of adding a hydroxylamine compound represented by the following general formula (1):
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