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Title:
METHOD FOR PRODUCING POLYOXYMETHYLENE RESIN COMPOSITION
Document Type and Number:
Japanese Patent JP2016094627
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a polyoxymethylene resin composition that can sufficiently suppress a generation amount of formaldehyde during molding without performing stabilization treatment for stabilizing an unstable terminal group of a crude oxymethylene copolymer.SOLUTION: The polyoxymethylene resin composition is produced by melting and kneading a hindered phenolic antioxidant and an ethylene methacrylic acid copolymer resin or an ethylene acrylic acid copolymer resin or a salt thereof with a crude oxymethylene copolymer having an unstable terminal group which has not been stabilized although a polymerization catalyst is deactivated after finishing the copolymerization without performing stabilization treatment for stabilizing the unstable terminal group. The thus-produced polyoxymethylene resin composition is suitably used for forming an extruded molded article because long-term discoloration and long-term degradation in physical properties is suppressed when the polyoxymethylene resin composition is extrusion-molded.SELECTED DRAWING: None

Inventors:
KADOMA TOMOHIRO
WATANABE KAZUFUMI
SHIMODA AKIHIDE
Application Number:
JP2016035533A
Publication Date:
May 26, 2016
Filing Date:
February 26, 2016
Export Citation:
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Assignee:
POLYPLASTICS CO
International Classes:
C08L59/02; C08G2/00; C08K3/20; C08K5/098; C08K5/13; C08L23/08
Domestic Patent References:
JP2000239484A2000-09-05
JP2000017144A2000-01-18
JP2010037445A2010-02-18
JP2008031348A2008-02-14
JP2000017143A2000-01-18
JPS61145245A1986-07-02
Other References:
高野菊雄編, ポリアセタール樹脂ハンドブック, vol. 初版, JPN6017011440, 28 February 1992 (1992-02-28), JP, pages 47 - 58, ISSN: 0003730770
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi