GB1122229A - Purification of lactides - Google Patents

Purification of lactides

Info

Publication number
GB1122229A
GB1122229A GB5495065A GB5495065A GB1122229A GB 1122229 A GB1122229 A GB 1122229A GB 5495065 A GB5495065 A GB 5495065A GB 5495065 A GB5495065 A GB 5495065A GB 1122229 A GB1122229 A GB 1122229A
Authority
GB
United Kingdom
Prior art keywords
lactide
lactides
benzene
heating
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
GB5495065A
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.)
Ethicon Inc
Original Assignee
Ethicon Inc
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 Ethicon Inc filed Critical Ethicon Inc
Publication of GB1122229A publication Critical patent/GB1122229A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
    • C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08—Lactones or lactides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

High molecular weight polylactide thermoplastics are produced by a process comprising heating a purified lactide (see Division C2) under nitrogen to 103 DEG C. until all of the lactide is melted, and then adding a solution containing 25% diethyl zinc and 75% heptane. The heating is continued with stirring for one hour and the polymer then removed. The examples describe the preparation of polymers from lactide having inherent viscosities of 1.98, 2.43, 2.62 and 1.95.ALSO:Lactides are purified by crystallization under anhydrous conditions from benzene or a mono-, di- or tri-(C1- 4-alkyl) benzene.
GB5495065A 1964-12-28 1965-12-28 Purification of lactides Expired GB1122229A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42170264A 1964-12-28 1964-12-28

Publications (1)

Publication Number Publication Date
GB1122229A true GB1122229A (en) 1968-07-31

Family

ID=23671671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5495065A Expired GB1122229A (en) 1964-12-28 1965-12-28 Purification of lactides

Country Status (6)

Country Link
BE (1) BE674355A (en)
DE (1) DE1280838B (en)
FR (1) FR1462616A (en)
GB (1) GB1122229A (en)
NL (1) NL6516979A (en)
SE (1) SE322788B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966982A (en) * 1988-04-27 1990-10-30 Mitsui Toatsu Chemicals, Incorporated Process for the production of lactide
WO1992005167A1 (en) * 1990-09-18 1992-04-02 Biopak Technology Ltd Lactide production from dehydration of aqueous lactic acid feed
US5319107A (en) * 1990-09-18 1994-06-07 Biopak Technology, Ltd. Method to produce cyclic esters
US5332839A (en) * 1990-09-18 1994-07-26 Biopak Technology, Ltd. Catalytic production of lactide directly from lactic acid
US5420304A (en) * 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
JPH07206851A (en) * 1994-01-25 1995-08-08 Shimadzu Corp Method for purifying lactide and method for polymerizing the same
US5444113A (en) * 1988-08-08 1995-08-22 Ecopol, Llc End use applications of biodegradable polymers
US5556895A (en) * 1988-08-08 1996-09-17 Ecopol Llc Degradable polydioxaneone-based materials
US5675021A (en) * 1992-03-19 1997-10-07 Chronopol, Inc. Method to produce and purify cyclic esters
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2115472C (en) * 1993-02-17 2002-08-13 William George O'brien Melt crystallization purification of lactides
CN114011462B (en) * 2021-11-18 2023-10-27 扬州大学 Polyaniline loaded zinc catalyst and preparation method and application thereof

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966982A (en) * 1988-04-27 1990-10-30 Mitsui Toatsu Chemicals, Incorporated Process for the production of lactide
US5760118A (en) * 1988-08-08 1998-06-02 Chronopol, Inc. End use applications of biodegradable polymers
US5556895A (en) * 1988-08-08 1996-09-17 Ecopol Llc Degradable polydioxaneone-based materials
US5801223A (en) * 1988-08-08 1998-09-01 Lipinsky; Edward S. Degradable polydioxaneone-based materials
US5444113A (en) * 1988-08-08 1995-08-22 Ecopol, Llc End use applications of biodegradable polymers
US5767222A (en) * 1988-08-08 1998-06-16 Chronopol, Inc. Degradable polydioxaneone-based materials
WO1992005167A1 (en) * 1990-09-18 1992-04-02 Biopak Technology Ltd Lactide production from dehydration of aqueous lactic acid feed
US5319107A (en) * 1990-09-18 1994-06-07 Biopak Technology, Ltd. Method to produce cyclic esters
US5332839A (en) * 1990-09-18 1994-07-26 Biopak Technology, Ltd. Catalytic production of lactide directly from lactic acid
US5274127A (en) * 1990-09-18 1993-12-28 Biopak Technology, Ltd. Lactide production from dehydration of aqueous lactic acid feed
US5675021A (en) * 1992-03-19 1997-10-07 Chronopol, Inc. Method to produce and purify cyclic esters
US5750732A (en) * 1992-03-19 1998-05-12 Chronopol, Inc. Method to produce cyclic esters
US5420304A (en) * 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
US5856523A (en) * 1992-03-19 1999-01-05 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction and further purification
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction
JPH07206851A (en) * 1994-01-25 1995-08-08 Shimadzu Corp Method for purifying lactide and method for polymerizing the same
JP2959375B2 (en) 1994-01-25 1999-10-06 株式会社島津製作所 Lactide purification and polymerization

Also Published As

Publication number Publication date
BE674355A (en) 1966-06-27
NL6516979A (en) 1966-06-29
DE1280838B (en) 1968-10-24
FR1462616A (en) 1966-12-16
SE322788B (en) 1970-04-20

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