Title:
A manufacturing method of an oxymethylene copolymer
Document Type and Number:
Japanese Patent JP6024749
Kind Code:
B2
Abstract:
The present invention is directed to a method for producing an oxymethylene copolymer by subjecting trioxane and 1,3-dioxolane to copolymerization using boron trifluoride or a coordination compound thereof as a catalyst, wherein the copolymerization is conducted in the presence of a steric-hindrance phenol in an amount of 0.006 to 2.0% by weight, based on the weight of the trioxane, using 0.01 to 0.07 mmol of boron trifluoride or a coordination compound thereof as a catalyst, relative to 1 mol of the trioxane, and wherein, at a point in time when the polymerization yield becomes 92% or more, the formed oxymethylene copolymer and a polymerization terminator are contacted to terminate the polymerization.
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Inventors:
Daigo Nakatani
Tsutomu Miyoshi
Akira Ito
Satoshi Mochida
Tsutomu Miyoshi
Akira Ito
Satoshi Mochida
Application Number:
JP2014515597A
Publication Date:
November 16, 2016
Filing Date:
May 10, 2013
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Ltd.
International Classes:
C08G2/06
Domestic Patent References:
| JP2008195755A | ||||
| JP62013369B1 | ||||
| JP10168144A | ||||
| JP7286023A | ||||
| JP9241342A | ||||
| JP11269165A |
Attorney, Agent or Firm:
Patent business corporation Tsukuni
Hajime Tsukuni
Toshio Miyake
Akio Shibata
Yoko Tanaka
Hajime Tsukuni
Toshio Miyake
Akio Shibata
Yoko Tanaka
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