CA1331193C - Preparation of polylactic acid and copolymers thereof - Google Patents

Preparation of polylactic acid and copolymers thereof

Info

Publication number
CA1331193C
CA1331193C CA000554321A CA554321A CA1331193C CA 1331193 C CA1331193 C CA 1331193C CA 000554321 A CA000554321 A CA 000554321A CA 554321 A CA554321 A CA 554321A CA 1331193 C CA1331193 C CA 1331193C
Authority
CA
Canada
Prior art keywords
lactide
organic solvent
sodium
polylactic acid
extraction
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 - Fee Related
Application number
CA000554321A
Other languages
English (en)
French (fr)
Inventor
Klaas S. De Vries
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.)
Akzo NV
Original Assignee
Akzo NV
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 Akzo NV filed Critical Akzo NV
Application granted granted Critical
Publication of CA1331193C publication Critical patent/CA1331193C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • 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

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)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
CA000554321A 1986-12-19 1987-12-15 Preparation of polylactic acid and copolymers thereof Expired - Fee Related CA1331193C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8603231 1986-12-19
NL86.03231 1986-12-19

Publications (1)

Publication Number Publication Date
CA1331193C true CA1331193C (en) 1994-08-02

Family

ID=19849020

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000554321A Expired - Fee Related CA1331193C (en) 1986-12-19 1987-12-15 Preparation of polylactic acid and copolymers thereof

Country Status (8)

Country Link
US (1) US4797468A (enExample)
EP (1) EP0275581B1 (enExample)
JP (1) JPS63165430A (enExample)
AT (1) ATE79386T1 (enExample)
CA (1) CA1331193C (enExample)
DE (1) DE3781133T2 (enExample)
ES (1) ES2052551T3 (enExample)
GR (1) GR3006204T3 (enExample)

Families Citing this family (126)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3708916A1 (de) * 1987-03-19 1988-09-29 Boehringer Ingelheim Kg Verfahren zur reinigung resorbierbarer polyester
JPH02500593A (ja) * 1987-06-16 1990-03-01 ベーリンガー　インゲルハイム　コマンディットゲゼルシャフト メソラクチド及びその製造方法
US5214159A (en) * 1987-06-16 1993-05-25 Boehringer Ingelheim Gmbh Meso-lactide
US6323307B1 (en) 1988-08-08 2001-11-27 Cargill Dow Polymers, Llc Degradation control of environmentally degradable disposable materials
US5767222A (en) * 1988-08-08 1998-06-16 Chronopol, Inc. Degradable polydioxaneone-based materials
US5180765A (en) * 1988-08-08 1993-01-19 Biopak Technology, Ltd. Biodegradable packaging thermoplastics from lactides
US5424346A (en) * 1988-08-08 1995-06-13 Ecopol, Llc Biodegradable replacement of crystal polystyrene
US5319107A (en) * 1990-09-18 1994-06-07 Biopak Technology, Ltd. Method to produce cyclic esters
US5274127A (en) * 1990-09-18 1993-12-28 Biopak Technology, Ltd. Lactide production from dehydration of aqueous lactic acid feed
JP2714454B2 (ja) * 1988-11-07 1998-02-16 三井東圧化学株式会社 生体吸収性ポリエステルの製造方法
US5149833A (en) * 1989-05-26 1992-09-22 Boehringer Ingelheim Gmbh Process for preparing D,L-Lactide
DE3917178A1 (de) * 1989-05-26 1990-11-29 Boehringer Ingelheim Kg Verbessertes verfahren zur herstellung von d,l-lactid
US5091544A (en) * 1990-05-08 1992-02-25 E. I. Du Pont De Nemours And Company Process for rapid conversion of oligomers to cyclic esters
WO1992000974A1 (en) * 1990-07-13 1992-01-23 E.I. Du Pont De Nemours And Company High yield recycle process for lactide
US5076983A (en) * 1990-07-16 1991-12-31 E. I. Du Pont De Nemours And Company Polyhydroxy acid films
US5332839A (en) * 1990-09-18 1994-07-26 Biopak Technology, Ltd. Catalytic production of lactide directly from lactic acid
US5117008A (en) * 1990-10-23 1992-05-26 E. I. Du Pont De Nemours And Company Solvent scrubbing recovery of lactide and other dimeric cyclic esters
US5089632A (en) * 1991-01-30 1992-02-18 E. I. Du Pont De Nemours And Company Process for preparing cyclic esters using a fluorocarbon
US5264617A (en) * 1991-11-22 1993-11-23 E. I. Du Pont De Nemours And Company Preparation of alkyl esters by depolymerization
US5264626A (en) * 1991-11-22 1993-11-23 E. I. Du Pont De Nemours And Company Rapid depolymerization of polyhydroxy acids
US5229528A (en) * 1991-11-22 1993-07-20 E. I. Du Pont De Nemours And Company Rapid depolymerization of polyhydroxy acids
US5264614A (en) * 1991-11-22 1993-11-23 E. I. Du Pont De Nemours And Company Recovery of polyhydroxy acids
US5268507A (en) * 1991-11-22 1993-12-07 E. I. Du Pont De Nemours And Company Preparation of amide derivatives of hydroxy acids
US5142023A (en) * 1992-01-24 1992-08-25 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US6005067A (en) * 1992-01-24 1999-12-21 Cargill Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
NZ249033A (en) 1992-01-24 1996-05-28 Cargill Inc Preparation of a polylactide from a lactide which has been purified by distillation
US6326458B1 (en) 1992-01-24 2001-12-04 Cargill, Inc. Continuous process for the manufacture of lactide and lactide polymers
US5247058A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5258488A (en) * 1992-01-24 1993-11-02 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5247059A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for the manufacture of a purified lactide from esters of lactic acid
US5236560A (en) * 1992-03-13 1993-08-17 E. I. Du Pont De Nemours And Company Solventless dimeric cyclic ester distillation process
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction
US5675021A (en) * 1992-03-19 1997-10-07 Chronopol, Inc. Method to produce and purify cyclic esters
US5420304A (en) * 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
IT1256918B (it) * 1992-08-04 1995-12-27 Mini Ricerca Scient Tecnolog Procedimento per la produzione di poli acido lattico.
US5264592A (en) * 1992-09-08 1993-11-23 Camelot Technologies Inc. Lactide melt recrystallization
US5278256A (en) * 1992-09-16 1994-01-11 E. I. Du Pont De Nemours And Company Rapidly degradable poly (hydroxyacid) compositions
US5338822A (en) * 1992-10-02 1994-08-16 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
CA2124845C (en) * 1992-10-02 2005-07-26 Patrick R. Gruber Paper having a melt-stable lactide polymer coating and process for manufacture thereof
AU5294893A (en) * 1992-10-02 1994-04-26 Cargill Incorporated A melt-stable lactide polymer fabric and process for manufacture thereof
US6005068A (en) 1992-10-02 1999-12-21 Cargill Incorporated Melt-stable amorphous lactide polymer film and process for manufacture thereof
US5631066A (en) * 1993-01-25 1997-05-20 Chronopol, Inc. Process for making metalized films and films produced therefrom
CA2115472C (en) 1993-02-17 2002-08-13 William George O'brien Melt crystallization purification of lactides
US5618911A (en) * 1993-08-19 1997-04-08 Toyo Boseki Kabushiki Kaisha Polymer containing lactic acid as its constituting unit and method for producing the same
JPH09507091A (ja) * 1993-12-20 1997-07-15 ザ、プロクター、エンド、ギャンブル、カンパニー 高い生分解性を有するｐＨ改質ポリマー組成物
US5639466A (en) * 1994-02-24 1997-06-17 Chronopol, Inc. Method for packaging foodstuffs
US5521278A (en) * 1994-08-18 1996-05-28 Ecological Chemical Products Integrated process for the manufacture of lactide
US5719256A (en) * 1995-10-19 1998-02-17 Mitsu Toatsu Chemicals, Inc. Process for preparing polycondensation polymer compound
JPH10109983A (ja) * 1996-10-04 1998-04-28 Mitsubishi Gas Chem Co Inc 環状エステルの製造方法および精製方法
US6362308B1 (en) 2000-08-10 2002-03-26 Alkermes Controlled Therapeutics Inc. Ii Acid end group poly(d,l-lactide-co-glycolide) copolymers high glycolide content
KR101297937B1 (ko) 2006-07-14 2013-08-19 킴벌리-클라크 월드와이드, 인크. 부직 웹에 사용하기 위한 생분해성 지방족 폴리에스테르
MX2009000527A (es) * 2006-07-14 2009-01-27 Kimberly Clark Co Acido polilactico biodegradable para su uso en telas no tejidas.
KR101311060B1 (ko) * 2006-07-14 2013-09-24 킴벌리-클라크 월드와이드, 인크. 부직 웹에 사용하기 위한 생분해성 지방족-방향족코폴리에스테르
AU2006347731B2 (en) * 2006-08-31 2012-09-13 Kimberly-Clark Worldwide, Inc. Highly breathable biodegradable films
US20100048082A1 (en) * 2006-12-15 2010-02-25 Topolkaraev Vasily A Biodegradable polylactic acids for use in forming fibers
CN101563392B (zh) * 2006-12-15 2013-02-13 金伯利-克拉克环球有限公司 用于形成纤维的生物可降解聚酯
ATE506472T1 (de) * 2007-08-22 2011-05-15 Kimberly Clark Co Mehrkomponentige biologisch abbaubare filamente und daraus gebildete vliesstoffe
US10313191B2 (en) 2007-08-31 2019-06-04 Level 3 Communications, Llc System and method for managing virtual local area networks
US10848347B2 (en) 2007-08-31 2020-11-24 Level 3 Communications, Llc Managing virtual local area network domains
AU2007362596B2 (en) * 2007-12-13 2014-05-22 Kimberly-Clark Worldwide, Inc. Biodegradable fibers formed from a thermoplastic composition containing polylactic acid and a polyether copolymer
US8227658B2 (en) 2007-12-14 2012-07-24 Kimberly-Clark Worldwide, Inc Film formed from a blend of biodegradable aliphatic-aromatic copolyesters
US7998888B2 (en) * 2008-03-28 2011-08-16 Kimberly-Clark Worldwide, Inc. Thermoplastic starch for use in melt-extruded substrates
US8147965B2 (en) * 2008-05-14 2012-04-03 Kimberly-Clark Worldwide, Inc. Water-sensitive film containing thermoplastic polyurethane
US8338508B2 (en) * 2008-05-14 2012-12-25 Kimberly-Clark Worldwide, Inc. Water-sensitive film containing an olefinic elastomer
EP2281080B1 (en) * 2008-05-30 2014-03-19 Kimberly-Clark Worldwide, Inc. Nonwoven web comprising polylactic acid fibers
US8188185B2 (en) * 2008-06-30 2012-05-29 Kimberly-Clark Worldwide, Inc. Biodegradable packaging film
US8759446B2 (en) * 2008-06-30 2014-06-24 Fina Technology, Inc. Compatibilized polypropylene and polylactic acid blends and methods of making and using same
US8268913B2 (en) * 2008-06-30 2012-09-18 Fina Technology, Inc. Polymeric blends and methods of using same
US8927617B2 (en) 2008-06-30 2015-01-06 Kimberly-Clark Worldwide, Inc. Fragranced water-sensitive film
US8545971B2 (en) * 2008-06-30 2013-10-01 Fina Technology, Inc. Polymeric compositions comprising polylactic acid and methods of making and using same
US8759279B2 (en) * 2008-06-30 2014-06-24 Kimberly-Clark Worldwide, Inc. Fragranced biodegradable film
WO2010053242A1 (en) * 2008-11-07 2010-05-14 Samyang Corporation Highly purified polylactic acid or a derivative thereof, a salt of the same, and purification method thereof
US8283006B2 (en) * 2008-12-18 2012-10-09 Kimberly-Clark Worldwide, Inc. Injection molding material containing starch and plant protein
US8329601B2 (en) 2008-12-18 2012-12-11 Kimberly-Clark Worldwide, Inc. Biodegradable and renewable film
US8968787B2 (en) 2010-05-24 2015-03-03 Micro Powders, Inc. Composition comprising biodegradable polymers for use in a cosmetic composition
US8936740B2 (en) 2010-08-13 2015-01-20 Kimberly-Clark Worldwide, Inc. Modified polylactic acid fibers
US10753023B2 (en) 2010-08-13 2020-08-25 Kimberly-Clark Worldwide, Inc. Toughened polylactic acid fibers
EP2633027B1 (en) 2010-10-28 2014-06-04 Total Research & Technology Feluy SA Process for polylactic acid production using monascus
US8461262B2 (en) 2010-12-07 2013-06-11 Kimberly-Clark Worldwide, Inc. Polylactic acid fibers
US20120245322A1 (en) 2011-03-25 2012-09-27 Hyundai Motor Company Manufacturing lactide from lactic acid
US20120245321A1 (en) 2011-03-25 2012-09-27 Hyundai Motor Company Manufacturing lactide from lactic acid
KR101326521B1 (ko) 2011-05-26 2013-11-07 현대자동차주식회사 유산으로부터 락타이드의 제조 방법
US9040598B2 (en) 2012-02-10 2015-05-26 Kimberly-Clark Worldwide, Inc. Renewable polyester compositions having a low density
US8980964B2 (en) 2012-02-10 2015-03-17 Kimberly-Clark Worldwide, Inc. Renewable polyester film having a low modulus and high tensile elongation
US8637130B2 (en) 2012-02-10 2014-01-28 Kimberly-Clark Worldwide, Inc. Molded parts containing a polylactic acid composition
US20130210621A1 (en) 2012-02-10 2013-08-15 Kimberly-Clark Worldwide, Inc. Breathable Film Formed from a Renewable Polyester
US8975305B2 (en) 2012-02-10 2015-03-10 Kimberly-Clark Worldwide, Inc. Rigid renewable polyester compositions having a high impact strength and tensile elongation
US10858762B2 (en) 2012-02-10 2020-12-08 Kimberly-Clark Worldwide, Inc. Renewable polyester fibers having a low density
EP2935667A4 (en) 2012-12-19 2016-08-17 Kimberly Clark Co LOW DENSITY FIBERS AND METHODS OF FORMATION THEREOF
US10240260B2 (en) 2013-06-12 2019-03-26 Kimberly-Clark Worldwide, Inc. Absorbent article containing a nonwoven web formed from a porous polyolefin fibers
SG11201510044PA (en) 2013-06-12 2016-01-28 Kimberly Clark Co Polyolefin material having a low density
US11965083B2 (en) 2013-06-12 2024-04-23 Kimberly-Clark Worldwide, Inc. Polyolefin material having a low density
BR112015029119B1 (pt) 2013-06-12 2021-06-22 Kimberly-Clark Worldwide, Inc Material polimérico com distribuição de tamanho de poros multimodal
MX386445B (es) 2013-06-12 2025-03-18 Kimberly Clark Co Aislamiento para construcciones.
BR112015030663B8 (pt) 2013-06-12 2022-06-07 Kimberly Clark Co Vestuário contendo um material polimérico poroso
EP3008120B1 (en) 2013-06-12 2019-08-07 Kimberly-Clark Worldwide, Inc. Polymeric material for use in thermal insulation
MX374156B (es) 2013-06-12 2025-03-05 Kimberly Clark Co Tecnica de iniciacion de poros.
KR101467202B1 (ko) * 2013-06-21 2014-12-01 한국화학연구원 젖산으로부터 락타이드 직접 제조용 성형 촉매 및 이의 제조 방법
EP3030606B1 (en) 2013-08-09 2021-09-08 Kimberly-Clark Worldwide, Inc. Anisotropic polymeric material
WO2015019202A1 (en) 2013-08-09 2015-02-12 Kimberly-Clark Worldwide, Inc. Technique for selectively controlling the porosity of a polymeric material
BR112016002589B1 (pt) 2013-08-09 2021-08-03 Kimberly-Clark Worldwide, Inc Material polimérico flexível moldado, membro tubular, e, método de moldagem de um material polimérico
RU2634255C2 (ru) 2013-08-09 2017-10-24 Кимберли-Кларк Ворлдвайд, Инк. Система доставки для активных средств
MX382698B (es) 2013-08-09 2025-03-13 Kimberly Clark Co Micropartículas que tienen una distribución de poros multimodal.
SG11201601712QA (en) 2013-08-09 2016-04-28 Kimberly Clark Co Polymeric material for three-dimensional printing
WO2015066588A1 (en) 2013-11-04 2015-05-07 The Procter & Gamble Company Thermoplastic polymer compositions having co-continuous plate-like morphology
BR112016028274A2 (pt) 2014-06-02 2017-08-22 Procter & Gamble filmes em multicamadas de polímeros termoplásticos compreendendo poli(ácido láctico)
US11186927B2 (en) 2014-06-06 2021-11-30 Kimberly Clark Worldwide, Inc. Hollow porous fibers
KR102330971B1 (ko) 2014-06-06 2021-11-25 킴벌리-클라크 월드와이드, 인크. 다공성 중합체 시트로부터 형성된 열성형 용품
US10640898B2 (en) 2014-11-26 2020-05-05 Kimberly-Clark Worldwide, Inc. Annealed porous polyolefin material
US11148347B2 (en) 2014-11-26 2021-10-19 Kimberly Clark Worldwide, Inc. Biaxially stretched porous film
AU2015380470A1 (en) 2015-01-30 2017-08-10 Kimberly-Clark Worldwide, Inc. Absorbent article package with reduced noise
BR112017015171B1 (pt) 2015-01-30 2022-09-20 Kimberly-Clark Worldwide, Inc Película, método para formação da película, e, artigo absorvente
US10843372B1 (en) * 2015-06-22 2020-11-24 Purdue Research Foundation Methods and compositions for preparing particle boards
KR102587469B1 (ko) 2015-12-11 2023-10-11 킴벌리-클라크 월드와이드, 인크. 다공성 섬유를 형성하기 위한 다단계 연신 기술
KR101960236B1 (ko) 2015-12-11 2019-03-19 킴벌리-클라크 월드와이드, 인크. 다공성 섬유를 형성하기 위한 방법
WO2017106267A1 (en) 2015-12-17 2017-06-22 Kimberly-Clark Worldwide, Inc. Color-changing polymeric material
EP4563636A4 (en) 2022-08-02 2025-10-29 Sk Leaveo Co Ltd METHOD FOR PREPARING A BIODEGRADABLE RESIN COMPOSITION, BIODEGRADABLE RESIN COMPOSITION SO PREPARED AND BIODEGRADABLE MOLDED PRODUCT COMPRISING IT
WO2024029818A1 (ko) 2022-08-02 2024-02-08 에스케이티비엠지오스톤 주식회사 생분해성 수지 조성물 및 이를 포함하는 생분해성 성형품
KR20240176689A (ko) 2023-06-16 2024-12-24 에스케이리비오 주식회사 생분해성 수지 조성물 및 이를 포함하는 생분해성 원사
KR102877044B1 (ko) 2023-07-05 2025-10-24 에스케이리비오 주식회사 생분해성 수지 조성물 및 이를 포함하는 생분해성 성형품
KR20250020901A (ko) 2023-08-04 2025-02-11 에스케이리비오 주식회사 생분해성 수지 조성물 및 이를 포함하는 생분해성 성형품
US20250075031A1 (en) 2023-09-05 2025-03-06 Sk Leaveo Co., Ltd. Eco-friendly biodegradable resin composition and biodegradable nonwoven fabric
KR20250035159A (ko) 2023-09-05 2025-03-12 에스케이리비오 주식회사 생분해성 부직포의 제조 방법 및 이에 의해 제조된 생분해성 부직포
WO2025076732A1 (en) 2023-10-11 2025-04-17 The Procter & Gamble Company A biodegradable flexible package with a personal care composition
EP4556517A1 (en) 2023-11-14 2025-05-21 SK leaveo Co., Ltd. Biodegradable resin composition and biodegradable molded article including the same
JP2025089271A (ja) 2023-12-01 2025-06-12 エスケー リーヴィオ カンパニー リミテッド 生分解性樹脂組成物、及びこれを含む生分解性成形品

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6609613A (enExample) * 1966-07-08 1968-01-09
US3457280A (en) * 1967-06-12 1969-07-22 American Cyanamid Co Alpha-glycolide and methods for the isolation thereof
US3435008A (en) * 1967-08-22 1969-03-25 American Cyanamid Co Method for preparation of isomerically pure beta-glycolide and polymerization method for glycolide compositions employing partial hydrolyzate of said beta-glycolide
US3597449A (en) * 1967-11-16 1971-08-03 American Cyanamid Co Stable glycolide and lactide composition
US3839297A (en) * 1971-11-22 1974-10-01 Ethicon Inc Use of stannous octoate catalyst in the manufacture of l(-)lactide-glycolide copolymer sutures
US4048256A (en) * 1976-06-01 1977-09-13 American Cyanamid Company Normally-solid, bioabsorbable, hydrolyzable, polymeric reaction product
US4539981A (en) * 1982-11-08 1985-09-10 Johnson & Johnson Products, Inc. Absorbable bone fixation device
JPS6136321A (ja) * 1984-07-27 1986-02-21 Daicel Chem Ind Ltd 新規なポリマ−およびその樹脂組成物
US4727163A (en) * 1985-07-11 1988-02-23 E. I. Du Pont De Nemours And Company Process for preparing highly pure cyclic esters
US4650851A (en) * 1986-03-19 1987-03-17 Pfizer Hospital Products Group, Inc. Purification of glycolide

Also Published As

Publication number Publication date
EP0275581A1 (en) 1988-07-27
JPS63165430A (ja) 1988-07-08
GR3006204T3 (enExample) 1993-06-21
US4797468A (en) 1989-01-10
DE3781133T2 (de) 1993-06-24
EP0275581B1 (en) 1992-08-12
ATE79386T1 (de) 1992-08-15
ES2052551T3 (es) 1994-07-16
DE3781133D1 (de) 1992-09-17

Similar Documents

Publication Publication Date Title
CA1331193C (en) Preparation of polylactic acid and copolymers thereof
Allcock et al. Synthesis of poly [(amino acid alkyl ester) phosphazenes]
AU2008347720C1 (en) Highly pure amphiphilic copolymer comprising hydrophobic block from alpha-hydroxy acid and process for the preparation thereof
Wen et al. Enzyme‐catalyzed ring‐opening polymerization of ethylene isopropyl phosphate
KR101119861B1 (ko) 고순도 폴리락틱산, 또는 그 유도체, 그 염, 및 그의 정제방법
EP0238273B1 (en) Purification of glycolide
McGrath et al. Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers
US5149833A (en) Process for preparing D,L-Lactide
KR102542987B1 (ko) 트리틸기 함유 단분산 폴리에틸렌 글리콜의 정제 방법
US20200246468A1 (en) Pharmaceutical composition with improved storage stability and method for preparing the same
BE1008099A3 (fr) Production semi-continue de polylactides par ouverture de cycle lactides obtenus a partir de derives d'acide lactique.
US5440007A (en) Composition of and method for forming high molecular weight predominantly syndiotactic substituted-poly (β-propioesters)
CA2993925A1 (en) Pharmaceutical composition with improved storage stability and method for preparing the same
KR20170014058A (ko) 양친성 블록 공중합체의 정제방법, 이로부터 얻어지는 양친성 블록 공중합체, 및 이를 포함하는 약학 조성물
AU2016299544A1 (en) Pharmaceutical composition with improved storage stability and method for preparing the same
EP3636690A1 (en) Method for producing polymer compound
US20170028066A1 (en) Pharmaceutical composition with improved storage stability and method for preparing the same
Scopelianos et al. Polymerization of hexachlorocyclotriphosphazene in the presence of carbon disulfide
WO2022266820A1 (zh) 一种超支化聚苯甲酸酯及其制备方法与应用
AU2016299547A1 (en) Pharmaceutical composition with improved storage stability and method for preparing the same
KR100349626B1 (ko) 선형 에틸렌-비닐아세테이트 알콜 중합체 및 그의 제조방법
US4140847A (en) Polymers of oxetane-spiro-cyclic polyethers
CN117964600A (zh) 一种乙交酯组合物及其制备方法和聚乙醇酸
JPS60248727A (ja) δ−バレロラクトン系重合体の精製方法
US20170028067A1 (en) Pharmaceutical composition with improved storage stability and method for preparing the same

Legal Events

Date Code Title Description
MKLA Lapsed