ES2052551T3 - Metodo para preparar poli(acido lactico) o copolimeros de poli(acido lactico) por polimeracion de la lactida. - Google Patents

Metodo para preparar poli(acido lactico) o copolimeros de poli(acido lactico) por polimeracion de la lactida.

Info

Publication number
ES2052551T3
ES2052551T3 ES87202432T ES87202432T ES2052551T3 ES 2052551 T3 ES2052551 T3 ES 2052551T3 ES 87202432 T ES87202432 T ES 87202432T ES 87202432 T ES87202432 T ES 87202432T ES 2052551 T3 ES2052551 T3 ES 2052551T3
Authority
ES
Spain
Prior art keywords
lactic acid
poly
lactide
polymeration
copolymers
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 - Lifetime
Application number
ES87202432T
Other languages
English (en)
Spanish (es)
Inventor
Vries Klaas Sybren De
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 ES2052551T3 publication Critical patent/ES2052551T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
ES87202432T 1986-12-19 1987-12-07 Metodo para preparar poli(acido lactico) o copolimeros de poli(acido lactico) por polimeracion de la lactida. Expired - Lifetime ES2052551T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8603231 1986-12-19

Publications (1)

Publication Number Publication Date
ES2052551T3 true ES2052551T3 (es) 1994-07-16

Family

ID=19849020

Family Applications (1)

Application Number Title Priority Date Filing Date
ES87202432T Expired - Lifetime ES2052551T3 (es) 1986-12-19 1987-12-07 Metodo para preparar poli(acido lactico) o copolimeros de poli(acido lactico) por polimeracion de la lactida.

Country Status (8)

Country Link
US (1) US4797468A (cg-RX-API-DMAC7.html)
EP (1) EP0275581B1 (cg-RX-API-DMAC7.html)
JP (1) JPS63165430A (cg-RX-API-DMAC7.html)
AT (1) ATE79386T1 (cg-RX-API-DMAC7.html)
CA (1) CA1331193C (cg-RX-API-DMAC7.html)
DE (1) DE3781133T2 (cg-RX-API-DMAC7.html)
ES (1) ES2052551T3 (cg-RX-API-DMAC7.html)
GR (1) GR3006204T3 (cg-RX-API-DMAC7.html)

Families Citing this family (124)

* 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
WO1988010260A1 (fr) * 1987-06-16 1988-12-29 Boehringer Ingelheim Kg ''meso-lactide'' et son procede de preparation
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
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
US5767222A (en) * 1988-08-08 1998-06-16 Chronopol, Inc. Degradable polydioxaneone-based materials
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
DE3917178A1 (de) * 1989-05-26 1990-11-29 Boehringer Ingelheim Kg Verbessertes verfahren zur herstellung von d,l-lactid
US5149833A (en) * 1989-05-26 1992-09-22 Boehringer Ingelheim Gmbh Process for preparing D,L-Lactide
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
EP0591188A1 (en) * 1990-07-13 1994-04-13 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
US5268507A (en) * 1991-11-22 1993-12-07 E. I. Du Pont De Nemours And Company Preparation of amide derivatives of hydroxy acids
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
US5264614A (en) * 1991-11-22 1993-11-23 E. I. Du Pont De Nemours And Company Recovery of polyhydroxy acids
US5229528A (en) * 1991-11-22 1993-07-20 E. I. Du Pont De Nemours And Company Rapid depolymerization of polyhydroxy acids
MX9300333A (es) 1992-01-24 1993-07-01 Cargill Inc Proceso continuo para la fabricacion de polimeros de lactida con metodos de purificacion mejorados.
US5258488A (en) * 1992-01-24 1993-11-02 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5142023A (en) * 1992-01-24 1992-08-25 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US6326458B1 (en) 1992-01-24 2001-12-04 Cargill, Inc. Continuous process for the manufacture of lactide and lactide polymers
US5247059A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for the manufacture of a purified lactide from esters of lactic acid
US6005067A (en) 1992-01-24 1999-12-21 Cargill Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5247058A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
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
US6005068A (en) 1992-10-02 1999-12-21 Cargill Incorporated Melt-stable amorphous lactide polymer film and process for manufacture thereof
DE69322155T2 (de) * 1992-10-02 1999-08-19 Cargill Papier mit einer beschichtung aus schmelzstabilem polymer und dessen verfahren zur herstellung
JP3447289B2 (ja) * 1992-10-02 2003-09-16 カーギル， インコーポレイテッド 溶融安定性ラクチドポリマー繊維及びその製造方法
US5338822A (en) * 1992-10-02 1994-08-16 Cargill, Incorporated Melt-stable lactide polymer composition 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
BR9408383A (pt) * 1993-12-20 1997-08-26 Procter & Gamble Composição de polímero dotada de biodegradabilidade aumentada película processo para aumentar a biodegradabilidade de um polímero e artigo absorvente
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
KR101311060B1 (ko) 2006-07-14 2013-09-24 킴벌리-클라크 월드와이드, 인크. 부직 웹에 사용하기 위한 생분해성 지방족-방향족코폴리에스테르
EP2044251B1 (en) 2006-07-14 2019-10-02 NatureWorks LLC Biodegradable aliphatic polyester for use in nonwoven webs
MX2009000527A (es) * 2006-07-14 2009-01-27 Kimberly Clark Co Acido polilactico biodegradable para su uso en telas no tejidas.
MX2009002159A (es) * 2006-08-31 2009-03-11 Kimberly Clark Co Peliculas biodegradables con alta capacidad para respirar.
WO2008073099A1 (en) * 2006-12-15 2008-06-19 Kimberly-Clark Worldwide, Inc. Biodegradable polyesters for use in forming fibers
CN101563391B (zh) * 2006-12-15 2012-04-18 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乳酸
CN101784711B (zh) * 2007-08-22 2012-11-07 金伯利-克拉克环球有限公司 多组分生物可降解纤丝及其制成的无纺纤网
US10848347B2 (en) 2007-08-31 2020-11-24 Level 3 Communications, Llc Managing virtual local area network domains
US10313191B2 (en) 2007-08-31 2019-06-04 Level 3 Communications, Llc System and method for managing virtual local area networks
US20100323575A1 (en) * 2007-12-13 2010-12-23 Aimin He 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
US8338508B2 (en) * 2008-05-14 2012-12-25 Kimberly-Clark Worldwide, Inc. Water-sensitive film containing an olefinic elastomer
US8147965B2 (en) 2008-05-14 2012-04-03 Kimberly-Clark Worldwide, Inc. Water-sensitive film containing thermoplastic polyurethane
CN102046861B (zh) * 2008-05-30 2012-12-12 金伯利-克拉克环球有限公司 聚乳酸纤维
US8759446B2 (en) 2008-06-30 2014-06-24 Fina Technology, Inc. Compatibilized polypropylene and polylactic acid blends and methods of making and using same
US8188185B2 (en) * 2008-06-30 2012-05-29 Kimberly-Clark Worldwide, Inc. Biodegradable packaging film
US8927617B2 (en) * 2008-06-30 2015-01-06 Kimberly-Clark Worldwide, Inc. Fragranced water-sensitive film
US8759279B2 (en) * 2008-06-30 2014-06-24 Kimberly-Clark Worldwide, Inc. Fragranced biodegradable film
US8545971B2 (en) * 2008-06-30 2013-10-01 Fina Technology, Inc. Polymeric compositions comprising polylactic acid 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
EP2364332A4 (en) * 2008-11-07 2013-10-16 Samyang Biopharmaceuticals HIGHLY CLEANED POLYMIC ACID OR DERIVATIVES, SALT AND PURIFICATION METHOD THEREFOR
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
US10753023B2 (en) 2010-08-13 2020-08-25 Kimberly-Clark Worldwide, Inc. Toughened polylactic acid fibers
US8936740B2 (en) 2010-08-13 2015-01-20 Kimberly-Clark Worldwide, Inc. Modified polylactic acid fibers
WO2012055998A1 (en) 2010-10-28 2012-05-03 Total S.A. Use of monascus in organic acid production
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
US10858762B2 (en) 2012-02-10 2020-12-08 Kimberly-Clark Worldwide, Inc. Renewable polyester fibers having a low density
US9040598B2 (en) 2012-02-10 2015-05-26 Kimberly-Clark Worldwide, Inc. Renewable polyester compositions having a low density
US8975305B2 (en) 2012-02-10 2015-03-10 Kimberly-Clark Worldwide, Inc. Rigid renewable polyester compositions having a high impact strength and 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
US8980964B2 (en) 2012-02-10 2015-03-17 Kimberly-Clark Worldwide, Inc. Renewable polyester film having a low modulus and high tensile elongation
US20140170922A1 (en) 2012-12-19 2014-06-19 Kimberly-Clark Worldwide, Inc. Low Density Fibers and Methods for Forming Same
BR112015030318B1 (pt) 2013-06-12 2020-12-08 Kimberly-Clark Worldwide, Inc material polimérico, isolamento térmico, artigo e método para formar um material polimérico
JP2016523293A (ja) 2013-06-12 2016-08-08 キンバリー クラーク ワールドワイド インコーポレイテッド 低密度を有するポリオレフィン材料
US11965083B2 (en) 2013-06-12 2024-04-23 Kimberly-Clark Worldwide, Inc. Polyolefin material having a low density
MX370867B (es) 2013-06-12 2020-01-06 Kimberly Clark Co Prenda que contiene un material polimérico poroso.
KR102208277B1 (ko) 2013-06-12 2021-01-27 킴벌리-클라크 월드와이드, 인크. 포어 개시 기술
WO2014199269A1 (en) 2013-06-12 2014-12-18 Kimberly-Clark Worldwide, Inc. Porous polyolefin fibers
CN105264152B (zh) 2013-06-12 2018-09-25 金伯利-克拉克环球有限公司 建筑隔离材料
WO2015187198A1 (en) 2014-06-06 2015-12-10 Kimberly-Clark Worldwide, Inc. Hollow porous fibers
US11084916B2 (en) 2013-06-12 2021-08-10 Kimberly-Clark Worldwide, Inc. Polymeric material with a multimodal pore size distribution
KR101467202B1 (ko) * 2013-06-21 2014-12-01 한국화학연구원 젖산으로부터 락타이드 직접 제조용 성형 촉매 및 이의 제조 방법
JP2016532579A (ja) 2013-08-09 2016-10-20 キンバリー クラーク ワールドワイド インコーポレイテッド 三次元印刷用高分子材料
JP6030810B2 (ja) 2013-08-09 2016-11-24 キンバリー クラーク ワールドワイド インコーポレイテッド 活性薬剤の送達システム
SG11201601706RA (en) 2013-08-09 2016-04-28 Kimberly Clark Co Technique for selectively controlling the porosity of a polymeric material
CN105408404B (zh) 2013-08-09 2019-01-15 金伯利-克拉克环球有限公司 具有多峰孔分布的微粒
EP3030605B1 (en) 2013-08-09 2019-08-07 Kimberly-Clark Worldwide, Inc. Flexible polymeric material with shape retention properties
JP2016528348A (ja) 2013-08-09 2016-09-15 キンバリー クラーク ワールドワイド インコーポレイテッド 異方性高分子材料
WO2015066588A1 (en) 2013-11-04 2015-05-07 The Procter & Gamble Company Thermoplastic polymer compositions having co-continuous plate-like morphology
US10259195B2 (en) 2014-06-02 2019-04-16 The Procter & Gamble Company Multi-layered thermoplastic polymer films comprising biopolymer
RU2016148475A (ru) 2014-06-06 2018-06-09 Кимберли-Кларк Ворлдвайд, Инк. Термоформованное изделие, образованное из пористого полимерного листа
KR101854581B1 (ko) 2014-11-26 2018-05-03 킴벌리-클라크 월드와이드, 인크. 이축 연신 다공성 필름
AU2015353887B2 (en) 2014-11-26 2019-07-04 Kimberly-Clark Worldwide, Inc. Annealed porous polyolefin material
AU2015380470A1 (en) 2015-01-30 2017-08-10 Kimberly-Clark Worldwide, Inc. Absorbent article package with reduced noise
CN107205871B (zh) 2015-01-30 2019-11-29 金伯利-克拉克环球有限公司 用于吸收制品的具有降低的噪声的膜
US10843372B1 (en) * 2015-06-22 2020-11-24 Purdue Research Foundation Methods and compositions for preparing particle boards
EP3387173B1 (en) 2015-12-11 2021-02-03 Kimberly-Clark Worldwide, Inc. Multi-stage drawing technique for forming porous fibers
WO2017100570A1 (en) 2015-12-11 2017-06-15 Kimberly-Clark Worldwide, Inc. Method for forming porous fibers
MX394788B (es) 2015-12-17 2025-03-24 Kimberly Clark Co Material polimerico que cambia de color.
WO2024029818A1 (ko) 2022-08-02 2024-02-08 에스케이티비엠지오스톤 주식회사 생분해성 수지 조성물 및 이를 포함하는 생분해성 성형품
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
KR20240176689A (ko) 2023-06-16 2024-12-24 에스케이리비오 주식회사 생분해성 수지 조성물 및 이를 포함하는 생분해성 원사
KR20250035159A (ko) 2023-09-05 2025-03-12 에스케이리비오 주식회사 생분해성 부직포의 제조 방법 및 이에 의해 제조된 생분해성 부직포
US20250075031A1 (en) 2023-09-05 2025-03-06 Sk Leaveo Co., Ltd. Eco-friendly biodegradable resin composition and biodegradable nonwoven fabric
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 (cg-RX-API-DMAC7.html) * 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
ATE79386T1 (de) 1992-08-15
DE3781133D1 (de) 1992-09-17
CA1331193C (en) 1994-08-02
DE3781133T2 (de) 1993-06-24
JPS63165430A (ja) 1988-07-08
EP0275581A1 (en) 1988-07-27
US4797468A (en) 1989-01-10
GR3006204T3 (cg-RX-API-DMAC7.html) 1993-06-21
EP0275581B1 (en) 1992-08-12

Similar Documents

Publication Publication Date Title
ES2052551T3 (es) Metodo para preparar poli(acido lactico) o copolimeros de poli(acido lactico) por polimeracion de la lactida.
ES8707513A1 (es) Procedimiento para preparar nuevos tetrahidro-benzotiazoles.
BR9305788A (pt) Processo continuo para a fabricação de polimeros lactideo com métodos aperfeiçoados de purificação
ES2053479T3 (es) Hidrorepelente para albañileria.
ES2036192T3 (es) Derivados del acido (met)-acrilico, que contienen grupos uretano, de triciclo (5.2.1.0.2.6) decano.
DE3687946D1 (de) Verfahren zur herstellung der 2-keto-l-gulonsaeure.
DK0403351T3 (da) Fremgangsmåde til fremstilling af ascorbinsyre
IT1213384B (it) Processo per la preparazione controllata di gilcosaminoglicani a basso peso molecolare.
NO852567L (no) Thymopentinanaloger og fremgangsmmaate for deres fremstilling.
ES487046A1 (es) Procedimiento de preparacion de proteoglicanos membranarios bacterianos purificados
ATE87003T1 (de) Oligosaccharide, immunogene und impstoffe und verfahren zur herstellung dieser oligosaccharide, immunogene und impstoffe.
DE3788229D1 (de) Verfahren zur isolierung von ca 125-antigen.
ES2053493T3 (es) Esteres del acido (met)-acrilico de siloxanos que contienen grupos triciclodecano.
ES8706700A1 (es) Procedimiento para preparar un derivado de cefalosporina.
ES2070335T3 (es) Procedimiento para la produccion de acido hialuronico de bajo peso molecular.
DE59209181D1 (de) Verfahren zur Herstellung von Mikrostrukturkörpern
ES2026150T3 (es) Procedimiento para la obtencion de gamma-butirolactonas alfa-substituidas.
ES2057020T3 (es) Procedimiento para la obtencion de 2,2,4-trimetil-1,2-dihidroquinolina oligomera.
UA19151A (uk) Спосіб одержаhhя оптичhо активhого (+)-4-деметоксидауhоміциhоhу
UA13478A1 (uk) Спосіб одержання бісфенолу а
DE3675855D1 (de) Verfahren zur herstellung von hochmolekularen, gegebenenfalls verzweigten polyarylensulfiden.
ES2068262T3 (es) Aditivo para el tratamiento de polimeros halogenados.
ES2076578T3 (es) Proceso para purificar carbonato de dimetilo.
ES554671A0 (es) Procedimiento para la fabricacion de acidos 6-alcoxi (inferior)-5-halo-1-naftoicos y sus esteres correspondientes
ES2070898T3 (es) Preparacion de 5-amino-1,2,4-triazol-3-sulfonamidas y compuestos intermedios.

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 275581

Country of ref document: ES