BE875578A - Procede pour la reduction de la teneur en ethers cycliques oligomeres de copolymeres thf-oxyde d'alcoylene - Google Patents

Procede pour la reduction de la teneur en ethers cycliques oligomeres de copolymeres thf-oxyde d'alcoylene

Info

Publication number
BE875578A
BE875578A BE0/194609A BE194603A BE875578A BE 875578 A BE875578 A BE 875578A BE 0/194609 A BE0/194609 A BE 0/194609A BE 194603 A BE194603 A BE 194603A BE 875578 A BE875578 A BE 875578A
Authority
BE
Belgium
Prior art keywords
emi
content
weight
copolymer
acid
Prior art date
Application number
BE0/194609A
Other languages
English (en)
French (fr)
Inventor
I Robinson
Original Assignee
Du Pont
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 Du Pont filed Critical Du Pont
Priority to BE0/194603A priority Critical patent/BE875584A/fr
Publication of BE875578A publication Critical patent/BE875578A/fr

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
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
    • C08G65/06—Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
    • C08G65/16—Cyclic ethers having four or more ring atoms
    • C08G65/20—Tetrahydrofuran
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
    • 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
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/30—Post-polymerisation treatment, e.g. recovery, purification, drying
    • 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
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterized by the type of post-polymerisation functionalisation
    • C08G2650/12—Depolymerisation, e.g. to reform the monomer
    • 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
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
    • C08G2650/34—Oligomeric, e.g. cyclic oligomeric

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyethers (AREA)
BE0/194609A 1978-06-13 1979-04-13 Procede pour la reduction de la teneur en ethers cycliques oligomeres de copolymeres thf-oxyde d'alcoylene BE875578A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE0/194603A BE875584A (fr) 1979-04-13 1979-04-13 Procede d'electrolyse d'une solution aqueuse d'un chlorure de metal alcalin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91519078A 1978-06-13 1978-06-13

Publications (1)

Publication Number Publication Date
BE875578A true BE875578A (fr) 1979-10-15

Family

ID=25435378

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/194609A BE875578A (fr) 1978-06-13 1979-04-13 Procede pour la reduction de la teneur en ethers cycliques oligomeres de copolymeres thf-oxyde d'alcoylene

Country Status (3)

Country Link
JP (1) JPS55795A (ja)
BE (1) BE875578A (ja)
PL (1) PL117661B1 (ja)

Also Published As

Publication number Publication date
JPS5725567B2 (ja) 1982-05-31
PL216266A1 (ja) 1980-03-24
PL117661B1 (en) 1981-08-31
JPS55795A (en) 1980-01-07

Similar Documents

Publication Publication Date Title
EP0168095B1 (fr) Procédé pour l'extraction de poly-beta-hydroxybutyrates au moyen d'un solvant à partir d'une suspension aqueuse de microorganismes
EP0014490B1 (fr) Procédé de séparation de poly-bêta-hydroxybutyrates d'une biomasse
EP0913374B1 (fr) Procédé d'obtention de la forme polymorphe epsilon de l'hexanitrohexaazaisowurtzitane
EP0295983B1 (fr) Nouveaux produits de condensation de silanols, leurs préparation et applications
EP0061393B1 (fr) Procédé continu de préparation de l'oxyde de propylène
JPS5946972B2 (ja) 重合体のオリゴマ−性環状エ−テル分減少方法
EP0591331B1 (fr) Procede de preparation de nanoparticules
EP1625108B1 (fr) Separation d'un diacetal du glyoxal par extraction liquide-liquide a contre-courant
JPS61247728A (ja) ポリテトラメチレンエ−テルグリコ−ル又はポリオキシブチレン−ポリオキシアルキレングリコ−ルの精製法
BE875578A (fr) Procede pour la reduction de la teneur en ethers cycliques oligomeres de copolymeres thf-oxyde d'alcoylene
BE1011539A3 (fr) Procede de fabrication d'un compose organique.
CA2044981C (fr) Procede de purification du (meth)acrylate de glycidyle
BE875579A (fr) Polyurethannes prepares avec des copolymeres thf-oxyde d'alcoylene a faible teneur en ethers cycliques oligomeres
CA1132995A (fr) Procede de preparation de polyethers glycidiques de polyphenols
EP0478428B1 (fr) Procédé de préparation d'oxyde borique par hydrolyse du borate de méthyle et sa mise en oeuvre dans l'oxydation d'hydrocarbures saturées en alcools
FR2569695A1 (fr) Procede de purification de sulfolane use provenant d'un procede d'obtention de tertio-butylstyrene
BE1011531A3 (fr) Procede de fabrication d'un compose organique.
FR2691380A1 (fr) Composition catalytique à base de silice et son utilisation pour la polymérisation de composés hétérocycliques.
FR2669021A1 (fr) Procede d'obtention d'au moins une olefine tertiaire par decomposition de l'ether correspondant en presence d'un catalyseur de type polyarylsilsesquioxane greffe sur un support inorganique.
FR2463759A1 (fr) Procede d'introduction de nitrosophenols comme inhibiteurs de polymerisation
EP0472446B1 (fr) Résines novolaques à base de para-alkylphenols. Leur procédé de préparation
EP0003716A1 (fr) Procédé de polymérisation d'oléfines, système catalytique utilisé et sa préparation
JPH01129022A (ja) テトラヒドロフラン共重合体中の環状オリゴマーエーテル含量を減少する方法
JP3963531B2 (ja) 光学異性体分離用カラム充填剤の製造法
JP3915253B2 (ja) ω−ハロゲノアルキルスチレン誘導体の製造方法

Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: E.I. DU PONT DE NEMOURS AND CY

Effective date: 19920430