JPS57141418A - Stabilization of oxymethylene copolymer - Google Patents

Stabilization of oxymethylene copolymer

Info

Publication number
JPS57141418A
JPS57141418A JP2720181A JP2720181A JPS57141418A JP S57141418 A JPS57141418 A JP S57141418A JP 2720181 A JP2720181 A JP 2720181A JP 2720181 A JP2720181 A JP 2720181A JP S57141418 A JPS57141418 A JP S57141418A
Authority
JP
Japan
Prior art keywords
copolymer
oxymethylene copolymer
stabilization
oxymethylene
200ppm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2720181A
Other languages
Japanese (ja)
Inventor
Hajime Nagahara
Toshiyuki Iwasako
Junzo Masamoto
Kenji Kagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Priority to JP2720181A priority Critical patent/JPS57141418A/en
Publication of JPS57141418A publication Critical patent/JPS57141418A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To form a color-free, stable, final product by a simple stabilization operation, by forming an oxymethylene copolymer having an unstable terminal- content ≤2wt% and heat-treating the copolymer.
CONSTITUTION: An oxymethylene copolymer containing 0.5W4mol% oxyalkylene units having adjacent carbon atoms and having a weight loss of below 2wt% when maintained in vacuo at 222°C for 50min is formed by bulk-polymerizing a small amount of ethylene oxide, diethylene glycol formal, etc., and trioxane at about 60W120°C to a conversion of about 81W94% in the presence of a catalyst (e.g., boron fluoride) in a self-cleaning type reactor. Next, the resulting copolymer (optionally in combination when below about 200ppm decomposition promotor, about 0.5W2wt% water, about 0.1W5wt% stabilizer, etc.) is kneaded, with heating, at a temperature of m.p. to 250°C for 0.1W10min by means of an extruder or the like.
COPYRIGHT: (C)1982,JPO&Japio
JP2720181A 1981-02-26 1981-02-26 Stabilization of oxymethylene copolymer Pending JPS57141418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2720181A JPS57141418A (en) 1981-02-26 1981-02-26 Stabilization of oxymethylene copolymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2720181A JPS57141418A (en) 1981-02-26 1981-02-26 Stabilization of oxymethylene copolymer

Publications (1)

Publication Number Publication Date
JPS57141418A true JPS57141418A (en) 1982-09-01

Family

ID=12214473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2720181A Pending JPS57141418A (en) 1981-02-26 1981-02-26 Stabilization of oxymethylene copolymer

Country Status (1)

Country Link
JP (1) JPS57141418A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03128911A (en) * 1989-10-16 1991-05-31 Asahi Chem Ind Co Ltd Stabilized polyacetal resin molding and its preparation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50119096A (en) * 1974-02-22 1975-09-18
JPS5285288A (en) * 1976-01-01 1977-07-15 Hoechst Ag Thermoplastic composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50119096A (en) * 1974-02-22 1975-09-18
JPS5285288A (en) * 1976-01-01 1977-07-15 Hoechst Ag Thermoplastic composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03128911A (en) * 1989-10-16 1991-05-31 Asahi Chem Ind Co Ltd Stabilized polyacetal resin molding and its preparation

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