GB1224593A - Method for producing polyoxy-methylene - Google Patents

Method for producing polyoxy-methylene

Info

Publication number
GB1224593A
GB1224593A GB650869A GB650869A GB1224593A GB 1224593 A GB1224593 A GB 1224593A GB 650869 A GB650869 A GB 650869A GB 650869 A GB650869 A GB 650869A GB 1224593 A GB1224593 A GB 1224593A
Authority
GB
United Kingdom
Prior art keywords
acetal
trioxan
room temperature
cho
irradiating
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
GB650869A
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.)
Daicel Corp
Mitsubishi Petrochemical Co Ltd
Ube Corp
Original Assignee
Daicel Corp
Mitsubishi Petrochemical Co Ltd
Ube Industries 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 Daicel Corp, Mitsubishi Petrochemical Co Ltd, Ube Industries Ltd filed Critical Daicel Corp
Publication of GB1224593A publication Critical patent/GB1224593A/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
    • 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
    • C08G2/24—Copolymerisation of aldehydes or ketones with acetals
    • 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
    • C08G2/34—Chemical modification by after-treatment by etherification

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)

Abstract

1,224,593. Trioxan polymerization by irradiation. DAICEL Ltd., MITSUBISHI PETROCHEMICAL CO. Ltd., and UBE INDUSTRIES Ltd. 6 Feb., 1969 [8 Feb., 1968], No. 6508/69. Heading C3P. Solid trioxan is homopolymerized by irradiation and in the presence of an alkyl acetal of formula where R 1 is C 1-6 alkyl and R 2 is H or C 1-5 alkyl. The process may be carried out in a number of ways, particularly by (i) mixing the trioxan and the acetal, and then irradiating at room temperature to 64‹ C., (ii) mixing the trioxan and acetal, allowing to stand at - 78‹ C. to room temperature, irradiating the system, and raising the temperature to room temperature to 64‹ C. to cause polymerization, or (iii) irradiating the trioxan and mixing with the acetal at or below room temperature, and maintaining the temperature at room temperature to 64‹ C. to cause polymerization. Further " ageing " periods may be allowed between the steps. The acetal causes terminal etherification of the forming or formed polyoxymethylene chains, thus giving a stabilized product of slightly lower molecular weight than without the acetal. Specified acetals are the dimethyl- and diethylacetals of H.CHO, CH 3 .CHO and C 2 H 5 .CHO.
GB650869A 1968-02-08 1969-02-06 Method for producing polyoxy-methylene Expired GB1224593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP745768 1968-02-08

Publications (1)

Publication Number Publication Date
GB1224593A true GB1224593A (en) 1971-03-10

Family

ID=11666337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB650869A Expired GB1224593A (en) 1968-02-08 1969-02-06 Method for producing polyoxy-methylene

Country Status (3)

Country Link
DE (1) DE1906252B2 (en)
FR (1) FR2001510A1 (en)
GB (1) GB1224593A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA959989A (en) * 1970-11-12 1974-12-24 Pierino Radici Method of preparing high molecular weight polyoxymethylenes

Also Published As

Publication number Publication date
DE1906252B2 (en) 1971-07-29
DE1906252A1 (en) 1970-03-19
FR2001510A1 (en) 1969-09-26

Similar Documents

Publication Publication Date Title
GB1224593A (en) Method for producing polyoxy-methylene
GB947140A (en) A method of producing porous vitreous mouldings
NL185349C (en) A process for the preparation of urea-formaldehyde condensation polymers modified by sulfogroups and a molded product manufactured wholly or in part from such a polymer.
CA944885A (en) Method for production of modified oxymethylene polymers
ES362169A1 (en) Process for the production of polymers and copolymers of vinyl chloride having a reduced molecular weight
GB1280573A (en) Process for preparing oxymethylene polymers
GB1139860A (en) Cyclic ethers of cardenolide digitoxosides
AU2752971A (en) Process forthe production of high molecular weight polymers
BE839992A (en) CONTINUOUS MASS POLYMERIZATION PROCESS
AU2020570A (en) Process for preparing lactonized polymer solutions
JPS5257285A (en) Production of oxymethylene copolymer
Zege et al. A light haze produced by a bounded pulsed source
ES425358A1 (en) Novel prostaglandin intermediates and process for the production thereof
ES319962A1 (en) Process for the preparation of macromolecular formaldehyde polymers
CA660582A (en) Production of polyoxymethylenes of high molecular weight by polymerisation of formaldehyde
CA684417A (en) Method for producing higher molecular weight formaldehyde polymer
GB1361035A (en) Method of preparing high molecular weight polyoxymethylenes
FR1301565A (en) A process for producing a high molecular weight formaldehyde polymer
CA703415A (en) Process for preparing high-molecular weight formaldehyde polymers with an average molecular weight falling within certain limits
GB1213030A (en) Process for producing a graft copolymer
CA1015089A (en) Process for the etherification of acetal polymers
CA958141A (en) Method of preparing high molecular weight linear organopolysiloxanes
AU453086B2 (en) Art of producing oxymethylene polymers by cationic polymerization
CA734579A (en) Production of high molecular weight polymers from 1,3-dienes
ES429758A1 (en) 2-Allyloxy-4-chloro-acetophenone