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GB979263A - Process for producing polyoxymethylene of good thermal stability - Google Patents

Process for producing polyoxymethylene of good thermal stability

Info

Publication number
GB979263A
GB979263A GB2958762D GB2958762D GB979263A GB 979263 A GB979263 A GB 979263A GB 2958762 D GB2958762 D GB 2958762D GB 2958762 D GB2958762 D GB 2958762D GB 979263 A GB979263 A GB 979263A
Authority
GB
United Kingdom
Prior art keywords
irradiation
polyoxymethylene
thermal stability
good thermal
producing polyoxymethylene
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.)
Expired
Application number
GB2958762D
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.)
Toray Industries Inc
Original Assignee
Toyo Rayon Co Ltd
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 Toyo Rayon Co Ltd filed Critical Toyo Rayon Co Ltd
Publication of GB979263A publication Critical patent/GB979263A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/02—Polymerisation initiated by wave energy or by particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/18—Copolymerisation of aldehydes or ketones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/28—Post-polymerisation treatments
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/30—Chemical modification by after-treatment
    • C08G2/36—Chemical modification by after-treatment by depolymerisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

979,263. Irradiating polyoxymethylene. TOYO RAYON KABUSHIKA KAISHA. Aug. 1, 1962 [Aug. 9, 1961], No. 29578/62. Heading C3P. A polyoxymethylene having a viscosity number of at least three is subjected to an ionizing irradiation. The irradiation may take place in a vacuum in a non-oxidizing medium e.g. methanol or toluene using cobalt 60 gamma-ray at between -250‹ and +200‹C. the irradiation dosage being 0À05 to 50 Mrad, preferably 0À2-5 Mrad. After irradiation the polymer may be heated, preferably in a vacuum at 0 to 350‹C. for at least 30 minutes, more preferably at about 200‹C.
GB2958762D 1961-08-09 1962-08-01 Process for producing polyoxymethylene of good thermal stability Expired GB979263A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2807461 1961-08-09

Publications (1)

Publication Number Publication Date
GB979263A true GB979263A (en) 1965-01-01

Family

ID=30830698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2958762D Expired GB979263A (en) 1961-08-09 1962-08-01 Process for producing polyoxymethylene of good thermal stability

Country Status (3)

Country Link
DE (1) DE1207628B (en)
FR (1) FR1330650A (en)
GB (1) GB979263A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1298515B (en) * 1963-12-28 1969-07-03 Asahi Chemical Ind Process for the production of pure formaldehyde gas
US3553090A (en) * 1966-05-21 1971-01-05 Japan Atomic Energy Res Inst Method for the stabilizing of polyoxy-methylene using high energy radiation and acetic anhydride

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1214169A (en) * 1958-07-23 1960-04-07 Houilleres Bassin Du Nord New process for the preparation of polyformaldehydes
US3103499A (en) * 1959-04-02 1963-09-10 Thermal stabilization of oxymethylene

Also Published As

Publication number Publication date
FR1330650A (en) 1963-06-21
DE1207628B (en) 1965-12-23

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