GB983075A - Improvements in the production of polyoxymethylene - Google Patents

Improvements in the production of polyoxymethylene

Info

Publication number
GB983075A
GB983075A GB42930/61A GB4293061A GB983075A GB 983075 A GB983075 A GB 983075A GB 42930/61 A GB42930/61 A GB 42930/61A GB 4293061 A GB4293061 A GB 4293061A GB 983075 A GB983075 A GB 983075A
Authority
GB
United Kingdom
Prior art keywords
trioxane
dosage
irradiation
temperature
effected
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
GB42930/61A
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.)
WR Grace and Co
Original Assignee
WR Grace and Co
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 WR Grace and Co filed Critical WR Grace and Co
Publication of GB983075A publication Critical patent/GB983075A/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
    • C08G2/10—Polymerisation of cyclic oligomers of formaldehyde
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S522/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S522/911—Specified treatment involving megarad or less

Landscapes

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

Abstract

High molecular weight polyoxymethylene is prepared by irradiating solid trioxane with ionizing radiation to a dosage of 0.001 to 10 megarads and simultaneously or subsequently while the trioxane is still in an activated state, subjecting the trioxane to polymerizing conditions. The irradiation may be effected to a dosage of 0.02 to 1 megarad at a temperature of 25 DEG C. or more (say 55 DEG C.) so that polymerization takes place immediately or the irradiation may be at below 25 DEG C. and polymerization subsequently effected by raising the temperature to above 25 DEG C. A stabilizer, e.g. calcium acetate, may be incorporated in the polymer.
GB42930/61A 1960-12-01 1961-11-30 Improvements in the production of polyoxymethylene Expired GB983075A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7286560A 1960-12-01 1960-12-01
US11851161A 1961-06-21 1961-06-21

Publications (1)

Publication Number Publication Date
GB983075A true GB983075A (en) 1965-02-10

Family

ID=85032146

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42930/61A Expired GB983075A (en) 1960-12-01 1961-11-30 Improvements in the production of polyoxymethylene

Country Status (3)

Country Link
BE (1) BE610364A (en)
FR (1) FR1310141A (en)
GB (1) GB983075A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2480260B1 (en) 2009-09-22 2016-03-02 Ethicon, Inc Composite layered hemostasis device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB993391A (en) * 1963-02-22 1965-05-26 Skanska Attikfabriken Ab Copolymerisation of trioxane
DE1243390B (en) * 1963-06-14 1967-06-29 Grace W R & Co Process for the production of high molecular weight polyoxymethylenes
US3202597A (en) * 1963-06-24 1965-08-24 Grace W R & Co Irradiation polymerization of compressed particulate trioxane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2480260B1 (en) 2009-09-22 2016-03-02 Ethicon, Inc Composite layered hemostasis device
EP2480260B2 (en) † 2009-09-22 2024-08-28 Ethicon, Inc Composite layered hemostasis device

Also Published As

Publication number Publication date
FR1310141A (en) 1963-03-06
BE610364A (en) 1962-05-16

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