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1. EP2522682 - Unstable terminal group decomposer, and stabilized polyacetal resin, manufacturing method, composition and molded article using the same

Office European Patent Office
Application Number 12178873
Application Date 07.03.2006
Publication Number 2522682
Publication Date 14.11.2012
Publication Kind A1
IPC
C08G 2/30
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
30Chemical modification by after-treatment
C08J 5/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5Manufacture of articles or shaped materials containing macromolecular substances
C08K 3/22
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
KUSE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
3Use of inorganic substances as compounding ingredients
18Oxygen-containing compounds, e.g. metal carbonyls
20Oxides; Hydroxides
22of metals
C08K 5/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
KUSE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
5Use of organic ingredients
C08L 59/04
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
59Compositions of polyacetals; Compositions of derivatives of polyacetals
04Copolyoxymethylenes
CPC
C08G 2/30
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
2Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
30Chemical modification by after-treatment
C08K 5/19
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
KUse of inorganic or non-macromolecular organic substances as compounding ingredients
5Use of organic ingredients
16Nitrogen-containing compounds
17Amines; Quaternary ammonium compounds
19Quaternary ammonium compounds
Y10T 428/31942
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
428Stock material or miscellaneous articles
31504Composite [nonstructural laminate]
31942Of aldehyde or ketone condensation product
Applicants POLYPLASTICS CO
Inventors HARASHINA HATSUHIKO
NAKAO HIROAKI
Title
(DE) Behandlungsmittel zur Entfernung von instabiler Endgruppe, damit hergestelltes stabilisiertes Polyacetalharz, Herstellungsverfahren, Zusammensetzung und Formkörper
(EN) Unstable terminal group decomposer, and stabilized polyacetal resin, manufacturing method, composition and molded article using the same
(FR) Agent de traitement destine a decomposer un groupe terminal instable, resine de polyacetal stabilisee produite avec celui-ci, procede de production, composition, et objet moule
Abstract
(EN)
The present invention provides a method of manufacturing a stabilized polyacetal resin, comprising the step of applying a heat treatment to a polyacetal resin having an unstable terminal group in the presence of an unstable terminal group decomposer, thereby decreasing the unstable terminal group, wherein the unstable terminal group decomposer is a quaternary ammonium salt and wherein a compound providing a counter-anion of a quaternary ammonium salt is an acidic enol-based compound.

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