Title:
PROCESS FOR PRODUCING POLYACETAL RESIN COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2017/104286
Kind Code:
A1
Abstract:
Provided is a polyacetal resin composition which is more versatile.
In the present invention, an aliphatic polycarboxylic acid (e) having four or more carbon atoms and two or more carboxyl groups and a hindered-phenol antioxidant (f) are incorporated into a polyacetal copolymer obtained by copolymerizing trioxane as a major monomer (a) with a cyclic ether and/or cyclic formal each having at least one carbon-carbon bond as a comonomer (b) using a specific heteropolyacid as a polymerization catalyst (c), adding, to the resultant reaction product, a compound (d) which is any of the carbonates, hydrogen carbonates, and carboxylates of alkali metal elements or alkaline-earth metal elements, the hydrates of these, and the hydroxides of alkali metal elements or alkaline-earth metal elements, and melt-kneading the mixture to deactivate the polymerization catalyst (c).
Inventors:
MONMA TOMOHIRO (JP)
Application Number:
PCT/JP2016/082824
Publication Date:
June 22, 2017
Filing Date:
November 04, 2016
Export Citation:
Assignee:
POLYPLASTICS CO (JP)
International Classes:
C08L59/04; C08K5/092; C08L23/08
Domestic Patent References:
WO2015075999A1 | 2015-05-28 |
Foreign References:
JP2014105278A | 2014-06-09 | |||
JP2014105279A | 2014-06-09 | |||
JP2000239484A | 2000-09-05 | |||
JP2000017144A | 2000-01-18 | |||
JP2004149670A | 2004-05-27 | |||
JP2000239484A | 2000-09-05 | |||
JPH11323076A | 1999-11-26 | |||
JP2014105278A | 2014-06-09 | |||
JP2014105279A | 2014-06-09 |
Other References:
See also references of EP 3392307A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
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