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GB952357A - Process for the purification of epoxy resins - Google Patents

Process for the purification of epoxy resins

Info

Publication number
GB952357A
GB952357A GB2972860A GB2972860A GB952357A GB 952357 A GB952357 A GB 952357A GB 2972860 A GB2972860 A GB 2972860A GB 2972860 A GB2972860 A GB 2972860A GB 952357 A GB952357 A GB 952357A
Authority
GB
United Kingdom
Prior art keywords
polyepoxide
acetone
resin
alkali salts
purified
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
GB2972860A
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.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
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 Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Publication of GB952357A publication Critical patent/GB952357A/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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/02—Polycondensates containing more than one epoxy group per molecule
    • C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
    • C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
    • C08G59/063—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols with epihalohydrins
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups

Landscapes

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

Abstract

Glycidyl ethers of dihydric phenols, which are produced by the reaction in an alkaline medium of epichlorohydrin with a mono- or bis-nuclear compound containing two phenolic hydroxyl groups, are purified by (i) acidifying the reaction mixture, (ii) separating the crude polyepoxide from the aqueous layer, (iii) washing it with boiling water, (iv) removing the wash water, (v) completely dehydrating the washed polyepoxide in a vacuum and at a bath temperature of approximately 130 DEG C., (vi) dissolving the polyepoxide, still containing alkali salts, in acetone, (vii) removing the alkali salts, which are insoluble in acetone, from the solution by filtration, and (viii) removing the solvent from the polyepoxide by distillation. Specification 518,057 is referred to.ALSO:Epoxy resins, which are thermo setting in the presence of a hardening agent, contain more than 1 epoxy group per molecule, and are produced by the reaction in an alkaline medium of epichlorhyrdin with a mono- or bis-nuclear com, pound containing two phenolic hydroxyl groups-are purified by (i) acidifying the reaction mixture, (ii) separating the crude resin from the aqueous layer, (iii) washing it with boiling water, (iv) removing the wash water, (v) completely dehydrating the washed resin in a vacuum and at a bath temperature of approximately 130 DEG C., (vi) dissolving the resin, still containing alkali salts, in acetone, (vii) removing the alkali salts, which are insoluble in acetone, from the solution by filteration, and (viii) removing the solvent from the resin by distillation. Examples are given in which either bisphenol A or resorcinol (Example 11) is reacted with epichlorhydrin in aqueous NaOH and the resulting product is purified. Specification 518,057 is referred to.
GB2972860A 1959-09-01 1960-08-29 Process for the purification of epoxy resins Expired GB952357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7763159A CH382448A (en) 1959-09-01 1959-09-01 Process for cleaning hardenable epoxy resins

Publications (1)

Publication Number Publication Date
GB952357A true GB952357A (en) 1964-03-18

Family

ID=4535855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2972860A Expired GB952357A (en) 1959-09-01 1960-08-29 Process for the purification of epoxy resins

Country Status (5)

Country Link
BE (1) BE594104A (en)
CH (1) CH382448A (en)
ES (1) ES260674A1 (en)
GB (1) GB952357A (en)
NL (1) NL255384A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4778863A (en) * 1987-08-13 1988-10-18 The Dow Chemical Company Preparation of epoxy resins having low undesirable halogen content
US4785061A (en) * 1987-08-13 1988-11-15 The Dow Chemical Company Method for reducing the aliphatic halide content of epoxy resins using a solvent mixture including a polar aprotic solvent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4778863A (en) * 1987-08-13 1988-10-18 The Dow Chemical Company Preparation of epoxy resins having low undesirable halogen content
US4785061A (en) * 1987-08-13 1988-11-15 The Dow Chemical Company Method for reducing the aliphatic halide content of epoxy resins using a solvent mixture including a polar aprotic solvent

Also Published As

Publication number Publication date
CH382448A (en) 1964-09-30
NL255384A (en)
BE594104A (en)
ES260674A1 (en) 1960-12-16

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