Title:
METHOD FOR PRODUCING OXYMETHYLENE COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2013/172270
Kind Code:
A1
Abstract:
The present invention relates to a method for producing an oxymethylene copolymer by copolymerizing trioxane with 1,3-dioxolane using boron trifluoride or a coordination compound thereof as a catalyst, wherein the copolymerization is carried out in the presence of a sterically hindered phenol in an amount of 0.006 to 2.0 wt% relative to the amount of trioxane using boron trifluoride or a coordination compound thereof in an amount of 0.01 to 0.07 millimole relative to 1 mole of trioxane as a catalyst, and the polymerization is terminated by bringing the produced oxymethylene copolymer into contact with a polymerization terminator at a time point at which the polymerization yield reaches 92% or more.
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Inventors:
NAKAYA DAIGO (JP)
MIYOSHI TSUTOMU (JP)
ITO AKIRA (JP)
MOCHIDA SATOSHI (JP)
MIYOSHI TSUTOMU (JP)
ITO AKIRA (JP)
MOCHIDA SATOSHI (JP)
Application Number:
PCT/JP2013/063183
Publication Date:
November 21, 2013
Filing Date:
May 10, 2013
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G2/10
Foreign References:
| JP2008195755A | 2008-08-28 | |||
| JPS6213369B2 | 1987-03-26 | |||
| JPH10168144A | 1998-06-23 | |||
| JPH07286023A | 1995-10-31 | |||
| JPH09241342A | 1997-09-16 | |||
| JPH11269165A | 1999-10-05 | |||
| JP3309641B2 | 2002-07-29 | |||
| JPH0363965B2 | 1991-10-03 | |||
| JP2908693B2 | 1999-06-21 | |||
| JPH11269165A | 1999-10-05 |
Other References:
See also references of EP 2851378A4
Attorney, Agent or Firm:
TSUKUNI & ASSOCIATES et al. (JP)
Patent business corporation Tsukuni (JP)
Patent business corporation Tsukuni (JP)
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