Title:
METHOD FOR PRODUCING POLYOXYMETHYLENE RESIN COMPOSITION
Document Type and Number:
Japanese Patent JP2015101599
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a polyoxymethylene resin composition which is sufficiently suppressed in the amount of formaldehyde generation during molding without performing stabilizing processing to stabilize unstable terminal groups of a crude oxymethylene copolymer.SOLUTION: There is produced a polyoxymethylene resin composition by melt-kneading a hindered phenolic antioxidant and an ethylene-methacrylic acid copolymer resin or an ethylene-acrylic acid copolymer resin or a salt thereof without subjecting a crude oxymethylene copolymer having unstable terminal groups to stabilizing processing to stabilize the unstable terminal groups though a polymerization catalyst is inactivated after the copolymerization. Since the long-term discoloration and the long-term deterioration of physical properties can be suppressed even after extrusion molding the polyoxymethylene resin composition, the resulting polyoxymethylene resin composition is suitable for molding an extrusion molded article.
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Inventors:
KADOMA TOMOHIRO
WATANABE KAZUFUMI
SHIMODA AKIHIDE
WATANABE KAZUFUMI
SHIMODA AKIHIDE
Application Number:
JP2013240853A
Publication Date:
June 04, 2015
Filing Date:
November 21, 2013
Export Citation:
Assignee:
POLYPLASTICS CO
International Classes:
C08L59/02; C08K5/098; C08K5/13; C08L23/08; C08L23/26
Domestic Patent References:
| JP2000239484A | 2000-09-05 | |||
| JP2000017144A | 2000-01-18 | |||
| JP2000017143A | 2000-01-18 | |||
| JPS61145245A | 1986-07-02 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi
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