GB1377083A - Method for the purification of a polyoxymethylene hono- or copolymer - Google Patents

Method for the purification of a polyoxymethylene hono- or copolymer

Info

Publication number
GB1377083A
GB1377083A GB5204671A GB5204671A GB1377083A GB 1377083 A GB1377083 A GB 1377083A GB 5204671 A GB5204671 A GB 5204671A GB 5204671 A GB5204671 A GB 5204671A GB 1377083 A GB1377083 A GB 1377083A
Authority
GB
United Kingdom
Prior art keywords
pom
solution
polymer
terminal
crystallization
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
GB5204671A
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.)
Ebauches SA
Original Assignee
Ebauches SA
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 Ebauches SA filed Critical Ebauches SA
Publication of GB1377083A publication Critical patent/GB1377083A/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
    • C08G2/30—Chemical modification by after-treatment
    • 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)
  • General 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1377083 Purification of polyoxymethylene polymers EBAUCHES SA 9 Nov 1971 [24 Nov 1970] 52046/71 Heading C3P Polyoxymethylene (POM) homo- or copolymers having terminal ester, ether or urethane groups are purified by subjecting them whilst in solution or in the form of a homogeneous gel to a heat treatment to destroy unstable residual components in the polymer which do not contain said terminal groups, converting the gel to a solution, if a gel is heat treated, effecting controlled cooling of the solution to induce crystallization of the polymer and thermostatically filtering the crystallized mixture so as to separate substantially pure POM homo- or copolymer having said terminal groups from short length polymer chains and impurities. A crystalline material (e.g. POM powder or a di- or polyurethane obtained by reaction of a diol with a mono-, di- or polyisocyanate) may be added to the solution to induce crystallization and a non solvent for the POM polymer may be added to the solution during cooling to facilitate crystallization. In the examples POM having terminal urethane or acetyl end groups is dissolved in γ butyrolactone, dimethylsulphoxide or a mixture of ethylene glycol and cyclohexanol, the solution is heated, then slowly cooled with and without the addition of POM crystallization seeds and thermostatically filtered.
GB5204671A 1970-11-24 1971-11-09 Method for the purification of a polyoxymethylene hono- or copolymer Expired GB1377083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1748470A CH523936A (en) 1970-11-24 1970-11-24 Process for the preparation of a pure polyoxymethylene, homo- or copolymer, with stabilized chains

Publications (1)

Publication Number Publication Date
GB1377083A true GB1377083A (en) 1974-12-11

Family

ID=4425763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5204671A Expired GB1377083A (en) 1970-11-24 1971-11-09 Method for the purification of a polyoxymethylene hono- or copolymer

Country Status (8)

Country Link
AT (1) AT306371B (en)
CA (1) CA961595A (en)
CH (1) CH523936A (en)
DE (1) DE2108747C3 (en)
FR (1) FR2123263B1 (en)
GB (1) GB1377083A (en)
IT (1) IT945116B (en)
NL (1) NL7115950A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8188211B2 (en) 2008-04-16 2012-05-29 Ticona Gmbh Oxymethylene polymers, process for the preparation thereof and use thereof
US8840976B2 (en) 2010-10-14 2014-09-23 Ticona Llc VOC or compressed gas containment device made from a polyoxymethylene polymer
US8968858B2 (en) 2011-12-30 2015-03-03 Ticona Llc Printable molded articles made from a polyoxymethylene polymer composition
US9005515B2 (en) 2011-04-01 2015-04-14 Ticona Gmbh High impact resistant polyoxymethylene for extrusion blow molding
US9745467B2 (en) 2012-12-27 2017-08-29 Ticona, Llc Impact modified polyoxymethylene composition and articles made therefrom that are stable when exposed to ultraviolet light

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620017C3 (en) * 1976-05-06 1979-05-31 Hoechst Ag, 6000 Frankfurt Process for the preparation of coarse-grained oxymethylene polymers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1349046A (en) * 1962-03-05 1964-01-10 Toyo Rayon Co Ltd Heat stabilization of polymers containing oxymethylene groups
FR1364519A (en) * 1962-07-27 1964-06-19 Montedison Spa Esterification process of polyoxymethylene in solution
FR1448609A (en) * 1964-09-30 1966-08-05 Celanese Corp Improvements in polymer post-treatments
DE1247645B (en) * 1964-12-23 1967-08-17 Bayer Ag Injection molding compounds containing high molecular weight polyacetals

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8188211B2 (en) 2008-04-16 2012-05-29 Ticona Gmbh Oxymethylene polymers, process for the preparation thereof and use thereof
US8742065B2 (en) 2008-04-16 2014-06-03 Ticona Gmbh Oxymethylene polymers, process for the preparation thereof and use thereof
US8840976B2 (en) 2010-10-14 2014-09-23 Ticona Llc VOC or compressed gas containment device made from a polyoxymethylene polymer
US9005515B2 (en) 2011-04-01 2015-04-14 Ticona Gmbh High impact resistant polyoxymethylene for extrusion blow molding
US8968858B2 (en) 2011-12-30 2015-03-03 Ticona Llc Printable molded articles made from a polyoxymethylene polymer composition
US9745467B2 (en) 2012-12-27 2017-08-29 Ticona, Llc Impact modified polyoxymethylene composition and articles made therefrom that are stable when exposed to ultraviolet light

Also Published As

Publication number Publication date
DE2108747B2 (en) 1976-02-19
CH523936A (en) 1972-06-15
FR2123263B1 (en) 1975-08-29
DE2108747C3 (en) 1980-01-10
AT306371B (en) 1973-04-10
CA961595A (en) 1975-01-21
IT945116B (en) 1973-05-10
NL7115950A (en) 1972-05-26
FR2123263A1 (en) 1972-09-08
DE2108747A1 (en) 1972-06-08

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee