Title:
PROCESS FOR PRODUCTION OF OXYMETHYLENE COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2016/104065
Kind Code:
A1
Abstract:
The invention provides a method for producing an oxymethylene copolymer including a polymerization step for cationically polymerizing trioxane and a comonomer at a polymerization temperature of 135 to 300°C in the presence of at least one polymerization initiator selected from the group consisting of protic acids, protic acid anhydrides, and protic acid ester compounds having a molecular weight of 1000 or less, and at least one salt of a protic acid having a molecular weight of 1000 or lower; wherein the total concentration of metal components contained in the trioxane and comonomer used in the polymerization step is 300 mass ppb or less.
Inventors:
NAKAYA DAIGO (JP)
TAKAHASHI TORU (JP)
MOCHIDA SATOSHI (JP)
OSHIMA KENSUKE (JP)
TAKAHASHI TORU (JP)
MOCHIDA SATOSHI (JP)
OSHIMA KENSUKE (JP)
Application Number:
PCT/JP2015/083680
Publication Date:
June 30, 2016
Filing Date:
December 01, 2015
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G2/10
Domestic Patent References:
| WO2015002147A1 | 2015-01-08 |
Foreign References:
| JP2010504380A | 2010-02-12 | |||
| JP2011137087A | 2011-07-14 | |||
| JP2008195777A | 2008-08-28 | |||
| JP2009227894A | 2009-10-08 | |||
| JP2009249451A | 2009-10-29 | |||
| JPH10182772A | 1998-07-07 |
Other References:
See also references of EP 3239201A4
Attorney, Agent or Firm:
TSUKUNI & ASSOCIATES et al. (JP)
Patent business corporation Tsukuni (JP)
Patent business corporation Tsukuni (JP)
Download PDF:
Previous Patent: HOT-PRESSING MOLD DEVICE AND METHOD FOR PRODUCING ELECTRICAL WIRE HAVING PROTECTIVE MEMBER
Next Patent: SIGNAL TRANSMISSION FLAT CABLE
Next Patent: SIGNAL TRANSMISSION FLAT CABLE