Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR PRODUCING OXYMETHYLENE COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2020/026781
Kind Code:
A1
Abstract:
The present invention, in one aspect, provides a method for producing an oxymethylene copolymer which gives molded articles that are inhibited from emitting formaldehyde and can be reduced in yellowness. In producing an oxymethylene copolymer, an effective polymerization initiator amount is regulated to a value within a given range, the amount being calculated from the amount of perchloric acid or a derivative thereof contained in the polymerization initiator and the amount of triethanolamine contained in all the monomers comprising trioxane and comonomers, which are starting materials for the copolymer.

Inventors:
OKADA TAKUYA (JP)
SUNAGA DAISUKE (JP)
Application Number:
PCT/JP2019/027842
Publication Date:
February 06, 2020
Filing Date:
July 16, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G2/10; C08G2/06
Domestic Patent References:
WO2018084281A12018-05-11
WO2015005169A12015-01-15
WO2014189139A12014-11-27
WO2013172270A12013-11-21
Foreign References:
JP2011137087A2011-07-14
JP2008533265A2008-08-21
JPS645822A1989-01-10
Other References:
See also references of EP 3686228A4
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
Download PDF:



 
Previous Patent: DISPLAY DEVICE

Next Patent: WIRING MEMBER