CA2211106A1 - Procede de finissage de polyglycols - Google Patents

Procede de finissage de polyglycols

Info

Publication number
CA2211106A1
CA2211106A1 CA002211106A CA2211106A CA2211106A1 CA 2211106 A1 CA2211106 A1 CA 2211106A1 CA 002211106 A CA002211106 A CA 002211106A CA 2211106 A CA2211106 A CA 2211106A CA 2211106 A1 CA2211106 A1 CA 2211106A1
Authority
CA
Canada
Prior art keywords
polyglycol
hypophosphorous acid
polyglycols
oxide
acid
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.)
Abandoned
Application number
CA002211106A
Other languages
English (en)
Inventor
Abel De Oliveira
Sergio Ferauche Souza
Ricardo Araujo
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.)
Dow Quimica SA
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA002211106A priority Critical patent/CA2211106A1/fr
Publication of CA2211106A1 publication Critical patent/CA2211106A1/fr
Abandoned 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
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • C08G65/46—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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyethers (AREA)

Abstract

Polyglycols ayant un poids en équivalent OH d'au moins 700 et pouvant être finis à l'aide d'acide hypophosphoreux de sorte que le catalyseur basique résiduel soit éliminé. L'acide hypophosphoreux forme des sels avec les métaux alcalins tels que le potassium, pour produire des sels très peu solubles dans de tels polyglycols. Ces sels forment également de grands cristaux aciculaires faciles à filtrer. Les procédés de finissage de polyglycols mettant en oeuvre l'acide hypophosphoreux permettent de préparer des polyols présentant de faibles concentrations de métaux alcalins, tout en produisant sensiblement moins de déchets solides et liquides que les procédés de finissage traditionnels.
CA002211106A 1995-01-24 1995-01-24 Procede de finissage de polyglycols Abandoned CA2211106A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002211106A CA2211106A1 (fr) 1995-01-24 1995-01-24 Procede de finissage de polyglycols

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002211106A CA2211106A1 (fr) 1995-01-24 1995-01-24 Procede de finissage de polyglycols

Publications (1)

Publication Number Publication Date
CA2211106A1 true CA2211106A1 (fr) 1996-08-01

Family

ID=4161095

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002211106A Abandoned CA2211106A1 (fr) 1995-01-24 1995-01-24 Procede de finissage de polyglycols

Country Status (1)

Country Link
CA (1) CA2211106A1 (fr)

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Legal Events

Date Code Title Description
FZDE Discontinued