WO2013000227A1 - 生物质肌酐催化共缩聚法合成聚乳酸-乙醇酸 - Google Patents

生物质肌酐催化共缩聚法合成聚乳酸-乙醇酸 Download PDF

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WO2013000227A1
WO2013000227A1 PCT/CN2011/081756 CN2011081756W WO2013000227A1 WO 2013000227 A1 WO2013000227 A1 WO 2013000227A1 CN 2011081756 W CN2011081756 W CN 2011081756W WO 2013000227 A1 WO2013000227 A1 WO 2013000227A1
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acid
glycolic acid
lactic
creatinine
glycolic
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PCT/CN2011/081756
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English (en)
French (fr)
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李弘�
张全兴
江伟
潘丙才
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南京大学
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Priority to US14/129,111 priority Critical patent/US9062159B2/en
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78Preparation processes
    • C08G63/82Preparation processes characterised by the catalyst used
    • C08G63/87Non-metals or inter-compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/34Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L17/00Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L17/00Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters
    • A61L17/06At least partially resorbable materials
    • A61L17/10At least partially resorbable materials containing macromolecular materials
    • A61L17/12Homopolymers or copolymers of glycolic acid or lactic acid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14Macromolecular materials
    • A61L27/18Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/54Biologically active materials, e.g. therapeutic substances
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08Lactones or lactides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78Preparation processes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78Preparation processes
    • C08G63/82Preparation processes characterised by the catalyst used
    • C08G63/823Preparation processes characterised by the catalyst used for the preparation of polylactones or polylactides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/60Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a special physical form
    • A61L2300/602Type of release, e.g. controlled, sustained, slow
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00Materials or treatment for tissue regeneration
    • A61L2430/02Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants

Definitions

  • the invention belongs to the technical field of medical biodegradable materials, and relates to synthesizing highly biosafety medical biodegradable polylactic acid by copolycondensation reaction using creatinine (human arginine metabolite) as a catalyst and lactic acid and glycolic acid as raw materials.
  • creatinine human arginine metabolite
  • lactic acid and glycolic acid as raw materials.
  • Polylactic acid-glycolic acid PLGA is an important medical biodegradable material with good biocompatibility, bioabsorbability and biodegradability. Since polylactic acid-glycolic acid is produced by copolymerization of lactic acid and glycolic acid, it has the advantages of two kinds of homopolymer polyester materials (polylactic acid PLA, polyglycolic acid PGA). Polylactic acid-glycolic acid not only has good biocompatibility, but its material strength, degradation rate, mechanical properties, etc. can be controlled by changing the composition and molecular weight of the copolymer, so it is a medical biodegradable material with wide practical value. .
  • Polylactic acid-glycolic acid has been widely used in many fields of biomedical applications: implantable hard tissue repair materials, surgical sutures, targeted and controlled release drug carriers. Degradable materials used in biomedical applications require a high degree of biosafety and do not contain any toxic metals and other toxic ingredients.
  • Commercially available polylactic acid-glycolic acid is produced by a stannous octoate catalyzed ring opening polymerization process or a stannous chloride catalytic polycondensation process.
  • the object of the present invention is to solve the problem that the existing polycondensation method for synthesizing polylactic acid-glycolic acid using stannous chloride as a catalyst to cause the safety of the polylactic acid-glycolic acid material used in the field of human medical medicinal use, and providing a kind of health A process for the synthesis of polylactic acid-glycolic acid by direct co-condensation of creatinine.
  • the present invention is the first to develop a non-toxic, metal-free biomass creatinine (human arginine metabolite) as a catalyst, lactic acid (LA, 85% aqueous solution) and glycolic acid (GA, 95%) as comonomer
  • creatinine human arginine metabolite
  • LA lactic acid
  • GA glycolic acid
  • the non-toxic, metal-free biomass organic bismuth compound used in the present invention has the chemical name: 2-amino-1-methyl-2-imidazolin-4-one (English name: 2-amino - 1-methyl- 2- imidazolin- 4- one, English common name creatinine, English abbreviation: CR), its molecular structure is as follows:
  • the method for the direct co-condensation polymerization of lactic acid and glycolic acid into a biomedical degradation material polylactic acid-glycolic acid using creatinine as a catalyst is as follows:
  • Polylactic acid-glycolic acid oligomer of lactic acid glycolic acid
  • the reaction kettle is filled with lactic acid and glycolic acid, repeated vacuuming and argon gas three times, then heated to 130-150 ° C under argon atmosphere and normal pressure, dehydration reaction for 1-3 hours; then the reaction The kettle is depressurized to 100 Torr and reacted at 130-150 ° C for 1 to 3 hours. Finally, the reaction vessel is depressurized to 30 Torr and reacted at 130 to 150 ° C for 1 to 3 hours.
  • the bio-degradable polylactic acid-glycolic acid with high biosafety is synthesized by using the oligomeric lactic acid-glycolic acid LGA synthesized in the first step as a raw material, using creatinine as a catalyst and performing bulk melt polycondensation under reduced pressure;
  • the synthesis reaction process conditions and operation methods are: adding oligolactic acid-glycolic acid, catalyst creatinine to the reaction vessel, controlling the mass ratio of the oligomeric lactic acid-glycolic acid to creatinine to be 100: 1-1000: 1, decompressing the reaction vessel to 10 Torn is heated to 150 ⁇ 190 °C for 40 ⁇ 170 hours to obtain polylactic acid-glycolic acid;
  • the polylactic acid-glycolic acid synthesized by the method of the present invention has a weight average molecular weight of 1.8 to 17.7 x 10 4 . Further, the polymer can be synthesized by controlling the polymerization reaction time within the above molecular weight range according to the actually required molecular weight.
  • the polylactic acid-glycolic acid synthesized by the method of the invention does not contain any metal or other toxic components, and can be used as an implantable hard tissue repair material, a surgical suture, a targeted and controlled release drug carrier. Description of the Invention Advantages and Benefits of the Invention:
  • the catalyst used is highly biocompatible and biosafety
  • Synthetic product polylactic acid - Glycolic acid has excellent biocompatibility and biodegradability and does not contain any metal or other toxic components.
  • the synthetic product polylactic - glycolic acid weight average molecular weight can be regulated in the range of 1.8 ⁇ 17.7xl0 4;
  • the reactor was charged with 45 g of industrial grade lactic acid aqueous solution LA of 85% by mass, 38 g of glycolic acid GA of 95% by mass, repeated vacuuming and argon gas three times, and then heated to argon atmosphere and normal pressure to Dehydration reaction at 130 °C for 3 hours.
  • the reaction vessel was then depressurized to 100 Torr and reacted at 130 ° C for 3 hours. Finally, the reaction vessel was depressurized to 30 Torr at 130 ° C for 3 hours to obtain an oligomeric lactic acid-glycolic acid OLGA having a yield of 98.0% and a weight average molecular weight of 220.
  • the reactor was charged with 45 g of 85% by mass industrial grade lactic acid aqueous solution LA, 38 g of 95% by mass of glycolic acid GA, repeated vacuuming and argon gas three times, and then heated to 150 under argon atmosphere and normal pressure. °C, dehydration reaction for 1 hour.
  • the reaction vessel was then depressurized to 100 Torr and reacted at 150 ° C for 1 hour. Finally, the reaction vessel was depressurized to 30 Torr at 150 ° C for 1 hour to obtain an oligolactic acid-glycolic acid OLGA having a yield of 98.2% and a weight average molecular weight of 280.
  • the reactor was charged with 45 g of industrial grade lactic acid aqueous solution LA having a mass content of 85%, 38 g of glycolic acid GA having a mass content of 95%, repeated vacuuming and argon gas three times, and then heated to 140 under an argon atmosphere and a normal pressure. °C, dehydration reaction for 2 hours.
  • the reaction vessel was then depressurized to 100 Torr and reacted at 140 ° C for 2 hours.
  • the reaction vessel was depressurized to 30 Torr and reacted at 140 ° C for 2 hours to obtain an oligomeric lactic acid-glycolic acid OLGA having a yield of 98.6% and a weight average molecular weight of 400.
  • oligolactic acid-glycolic acid 70 g, and 265 mg of catalyst creatinine were added, and the reaction vessel was depressurized to 10 Torr, and the temperature was raised to 170 ° C for 132 hours. After the reaction was stopped, the reaction vessel was cooled to room temperature, and the polymer was dissolved in acetone, poured into ethanol at 0 ° C, and filtered under reduced pressure. The obtained product was vacuum dried at 50 ° C for 36 hours to obtain a white solid, that is, polylactic acid-glycolic acid was obtained in a yield of 85.6%, and the weight average molecular weight of the polymer was 7.08 x 10 4 .
  • the reactor was charged with 90 g of industrial grade lactic acid aqueous solution LA of 85% by mass, 7.6 g of glycolic acid GA of 95% by mass, repeated vacuuming and argon gas three times, and then heated under argon atmosphere and normal pressure. Dehydration reaction to 130 ° C for 3 hours. The reaction vessel was then depressurized to 100 Torr and reacted at 130 ° C for 3 hours. Finally, the reaction vessel was depressurized to 30 Torr and reacted at 130 ° C for 3 hours to obtain an oligomeric lactic acid-glycolic acid OLGA having a yield of 98.1% and a weight average molecular weight of 310.
  • the reactor was charged with 15 g of industrial grade lactic acid aqueous solution LA of 85% by mass, 102 g of glycolic acid GA of 95% by mass, and repeated vacuuming - after argon gas was operated three times, it was heated under argon atmosphere and normal pressure. Dehydration reaction to 130 ° C for 3 hours. The reaction vessel was then depressurized to 100 Torr and reacted at 130 ° C for 3 hours. Finally, the reaction vessel was depressurized to 30 Torr at 130 ° C for 3 hours to obtain an oligomeric lactic acid-glycolic acid OLGA having a yield of 98.0% and a weight average molecular weight of 220.

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Abstract

一种生物质肌酐催化乳酸、乙醇酸共缩聚合成医用生物降解材料聚乳酸-乙醇酸的工艺方法。本发明以人体内精氨酸代谢生成物肌酐为催化剂、工业级乳酸(LA,85%水溶液)和乙醇酸(GA,95%)为共聚单体、经本体无溶剂二阶共缩聚,得到高度生物安全性医用降解性聚乳酸-乙醇酸。本发明特点:采用绿色工艺、原料成本低廉、操作简便、易于工业化实施;催化剂肌酐具有高度生物相容性、生物安全性并且无细胞毒性,所合成聚乳酸-乙醇酸不含任何金属及其他有毒残余物;所合成聚乳酸-乙醇酸分子量可在1.8~17.7×104范围调控;所合成聚乳酸-乙醇酸适合用作植入性硬组织修复材料、手术缝合线、靶向及控释药物载体。

Description

说 明 书 生物质肌酐催化共缩聚法合成聚乳酸-乙醇酸 技术领域
本发明属于医用生物降解材料技术领域, 涉及用生物质肌酐 (人体内精氨酸代谢生成 物)为催化剂, 以乳酸、 乙醇酸为原料经共縮聚反应合成高度生物安全性医用生物降解性 聚乳酸-乙醇酸 (乳酸-乙醇酸共聚物) 的工艺方法。 背景技术
聚乳酸-乙醇酸 PLGA是一种重要的医用生物降解材料, 具有良好的生物相容性、 生物 可吸收性及生物降解性。 由于聚乳酸-乙醇酸是由乳酸和乙醇酸共聚制成, 因此兼有两种 均聚物聚酯材料(聚乳酸 PLA, 聚乙醇酸 PGA) 的优点。 聚乳酸 -乙醇酸不仅具有良好的生 物相容性, 并且其材料强度、 降解速率、机械性能等可以通过改变共聚物的组成和分子量 来调控, 因此是一种有广泛实用价值的医用生物降解材料。 聚乳酸-乙醇酸已被被广泛应 用于生物医学领域的诸多方面: 如植入性硬组织修复材料、手术缝合线、靶向及控释药物 载体。应用于生物医学领域的降解材料要求具有高度生物安全性, 并不含有任何毒性金属 及其他毒性成分。 目前商品化的聚乳酸 -乙醇酸的生产采用辛酸亚锡催化开环聚合法或氯 化亚锡催化縮聚法制备。 国内外近期的研究已无疑的证明, 二价锡盐(辛酸亚锡、 氯化亚 锡) 具有细胞毒性, 由于所用锡盐催化剂在聚合反应后不能彻底从所合成聚合物中去除, 因此采用二价锡类为催化剂合成的聚乳酸 -乙醇酸用作人类医用材料的安全性问题已引起 国内外科学家的普遍质疑。 因此, 探求高效、 无毒、 无金属的绿色催化剂用于聚乳酸-乙 醇酸的合成已成为生物医用降解材料领域挑战性课题。
发明内容
本发明的目的是解决现有缩聚法合成聚乳酸 -乙醇酸使用氯化亚锡为催化剂造成所合 成聚乳酸 -乙醇酸材料用于人类医用药用领域存在安全性隐患的问题, 提供一种生物质肌 酐催化直接共縮聚法合成聚乳酸-乙醇酸的工艺方法。
本发明首次研发出一种利用无毒、 无金属生物质肌酐(人体内精氨酸代谢生成物)为 催化剂, 乳酸 (LA, 85%水溶液) 和乙醇酸 (GA, 95% ) 为共聚单体经本体共缩聚法合 成高度生物安全性生物医用降解材料聚乳酸-乙醇酸的新工艺方法。
本发明所使用的无毒、 无金属生物质有机胍化合物——肌酐, 其化学名称为: 2-氨基 -1-甲基- 2-咪唑啉 -4-酮 (英文学名为: 2- amino- 1- methyl- 2- imidazolin- 4- one, 英文俗名为 creatinine, 英文缩写为: CR), 其分子结构如下:
Figure imgf000003_0001
肌酐 (CR)
本发明提供的以肌酐为催化剂进行乳酸、 乙醇酸直接共缩聚合成生物医用降解材料聚 乳酸 -乙醇酸的工艺方法的步骤如下:
第 1、 寡聚乳酸-乙醇酸 OLGA的合成
以摩尔比为 9:1~1:9的质量含量为 85%的工业级乳酸水溶液 LA和质量含量为 95%的 乙醇酸 GA为共聚单体, 首先合成重均分子量 Mw =200-400的寡聚乳酸-乙醇酸 (乳酸乙 醇酸的低聚物);
工艺条件: 在反应釜中装入乳酸和乙醇酸, 重复抽真空一充氩气操作三次后, 在氩 气氛及常压下加热至 130~150°C, 脱水反应 1~3小时; 然后将反应釜减压至 100 Torr在 130-150 °C下反应 1~3小时; 最后将反应釜减压至 30 Torr在 130~150°C下反应 1~3小时; 合成反应式:
CH3 0
HO-CH— ,-C ,}0H
Figure imgf000003_0002
LA GA OLGA . 第 2、 聚乳酸-乙醇酸 PLGA的合成
以第 1步合成的寡聚乳酸-乙醇酸 LGA为原料、 以肌酐为催化剂、 在减压下进行本体 熔融缩聚, 合成得到高度生物安全性的生物医用降解性聚乳酸-乙醇酸;
合成反应工艺条件及操作方法是: 向反应釜加入寡聚乳酸-乙醇酸、 催化剂肌酐, 控 制寡聚乳酸 -乙醇酸与肌酐的质量比为 100: 1-1000: 1, 将反应釜减压至 10 Torn 升温至 150~190°C反应 40~170小时, 得到聚乳酸-乙醇酸;
合成反应式:
Figure imgf000003_0003
Mw 200-400 Mw 1.8-17.7 x 10·
OLGA PLGA
本发明方法所合成的聚乳酸-乙醇酸重均分子量为 1.8~17.7xl04。 并且聚合物可按实 际要求的分子量在上述分子量范围内通过控制聚合反应时间进行合成。
本发明方法合成的聚乳酸-乙醇酸不含有任何金属及其它有毒成分, 可用作植入性硬 组织修复材料、 手术缝合线、 靶向及控释药物载体。 说 明 书 本发明的优点和有益效果:
1.所用催化剂具有高度生物相容性、 生物安全性;
2. 合成产物聚乳酸 -乙醇酸具有优良的生物相容性和生物降解性, 不含有任何金属及 其他毒性成分。
3.合成产物聚乳酸-乙醇酸重均分子量可在 1.8~17.7xl04范围内调控;
4. 采用绿色催化剂和绿色工艺 (不使用任何溶剂、 无有毒产物生成), 合成绿色 (高 度生物安全性) 生物医用降解材料聚乳酸-乙醇酸;
5. 原料成本低廉、 工艺操作简便, 易于工业化实施。 具体实施方式- 实施例 1——寡聚乳酸-乙醇酸的合成
在反应釜中装入 45g质量含量为 85%的工业级乳酸水溶液 LA、 38g质量含量为 95% 的乙醇酸 GA, 重复抽真空一充氩气操作三次后, 在氩气氛及常压下加热至 130 °C, 脱 水反应 3小时。然后将反应釜减压至 100 Torr在 130 °C下反应 3小时。最后将反应釜减压 至 30 Torr在 130 °C下反应 3小时, 得到寡聚乳酸-乙醇酸 OLGA, 产率 98.0%, 重均分子 量为 220。
实施例 2——寡聚乳酸-乙醇酸的合成
在反应釜中装入 45g质量含量为 85%的工业级乳酸水溶液 LA、 38g质量含量为 95% 的乙醇酸 GA重复抽真空一充氩气操作三次后, 在氩气氛及常压下加热至 150 °C, 脱水 反应 1小时。然后将反应釜减压至 100 Torr在 150 °C下反应 1小时。最后将反应釜减压至 30 Torr在 150 °C下反应 1小时, 得到寡聚乳酸-乙醇酸 OLGA, 产率 98.2%, 重均分子量 为 280。
实施例 3——寡聚乳酸-乙醇酸的合成
在反应釜中装入 45g质量含量为 85%的工业级乳酸水溶液 LA、 38g质量含量为 95% 的乙醇酸 GA重复抽真空一充氩气操作三次后, 在氩气氛及常压下加热至 140 °C, 脱水 反应 2小时。然后将反应釜减压至 100 Torr在 140 °C下反应 2小时。最后将反应釜减压至 30 Torr在 140 °C下反应 2小时, 得到寡聚乳酸-乙醇酸 OLGA, 产率 98.6%, 重均分子量 为 400。
实施例 4——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 Torr, 升温至 19CTC反应 40小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 85.9%, 聚合物重均分子量为 1.83xl04
实施例 5——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 To 说 明 书 升温至 170°C反应 48小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 85.0%, 聚合物重均分子量为 1.86xl04
实施例 6——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 Torn 升温至 150°C反应 54小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 87.4%, 聚合物重均分子量为 1.80xl04
实施例 Ί——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 To 升温至 190 °C反应 124小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 85.1%, 聚合物重均分子量为 7.12xl04
实施例 8——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸、 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 Torr, 升温至 170°C反应 132小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 85.6%, 聚合物重均分子量为 7.08xl04
实施例 9——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 Torn 升温至 15CTC反应 150小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 86.2%, 聚合物重均分子量为 7.07xl04
实施例 10——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 Torr, 升温至 190°C反应 154小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 84.7%, 聚合物重均分子量为 17.7xl04
实施例 11——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 Torr, 升温至 170°C反应 160小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 84.5%, 聚合物重均分子量为 17.3xl04
实施例 12——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 265mg, 将反应釜减压至 10 To 说 明 书 升温至 150°C反应 169小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 84.9%, 聚合物重均分子量为 17.0xl04
实施例 13——寡聚乳酸-乙醇酸的合成
在反应釜中装入 90g质量含量为 85%的工业级乳酸水溶液 LA、 7.6g质量含量为 95% 的乙醇酸 GA, 重复抽真空一充氩气操作三次后, 在氩气氛及常压下加热至 130 °C, 脱 水反应 3小时。然后将反应釜减压至 lOO Torr在 130 °C下反应 3小时。最后将反应釜减压 至 30 Torr在 130 °C下反应 3小时, 得到寡聚乳酸-乙醇酸 OLGA, 产率 98.1%, 重均分子 量为 310。
实施例 14——寡聚乳酸-乙醇酸的合成
在反应釜中装入 15g质量含量为 85%的工业级乳酸水溶液 LA、 102g质量含量为 95% 的乙醇酸 GA, 重复抽真空——充氩气操作三次后, 在氩气氛及常压下加热至 130 °C, 脱 水反应 3小时。然后将反应釜减压至 lOO Torr在 130 °C下反应 3小时。最后将反应釜减压 至 30 Torr在 130 °C下反应 3小时, 得到寡聚乳酸-乙醇酸 OLGA, 产率 98.0%, 重均分子 量为 220。
实施例 15——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 700mg, 将反应釜减压至 10 To 升温至 160°C反应 170小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 84.7%, 聚合物重均分子量为 17.1xl04
实施例 16——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 140mg, 将反应釜减压至 10 Torr, 升温至 170°C反应 60小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒 入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得 聚乳酸-乙醇酸, 产率 84.6%, 聚合物重均分子量为 1.88xl04
实施例 17——聚乳酸-乙醇酸的合成
向反应釜加入寡聚乳酸-乙醇酸 70g、 催化剂肌酐 70mg, 将反应釜减压至 10 Torr, 升 温至 18CTC反应 48小时。 停止反应后, 将反应釜冷至室温, 将聚合物用丙酮溶解, 倒入 0 °C的乙醇中, 减压过滤。 所得产品在 50 °C下真空干燥 36小时, 得到白色固体, 即得聚乳 酸-乙醇酸, 产率 85.1%, 聚合物重均分子量为 1.98xl04

Claims

权 利 要 求 书
1、一种肌酐催化乳酸、 乙醇酸共縮聚合成医用生物降解材料聚乳酸-乙醇酸的工艺方 法, 其特征在于该方法以人体内精氨酸代谢生成物肌酐 CR为催化剂、 工业级乳酸和乙醇 酸为共聚单体、 经本体无溶剂二阶共缩聚, 得到高度生物安全性医用降解性聚乳酸 -乙醇 酸, 具体合成步骤包括:
第 1、 寡聚乳酸-乙醇酸 OLGA的合成
以摩尔比为 9:1~1:9的工业级质量含量为 85%的乳酸水溶液 LA和质量含量为 95%的 乙醇酸 GA为共聚单体, 首先合成重均分子量 Mw =200-400的寡聚乳酸-乙醇酸;
工艺条件: 在反应釜中装入乳酸和乙醇酸, 重复抽真空一充氩气操作三次后, 在氩 气氛及常压下加热至 130~150°C, 脱水反应 1~3小时; 然后将反应釜减压至 100 Torr在 130-150 °C下反应 1~3小时; 最后将反应釜减压至 30 Torr在 130~150°C下反应 1~3小时; 合成反应式:
CH3 0
I // ,
H0-CH— C 4- HO-
QH
Figure imgf000007_0001
Mw 200-400
LA GA OLGA . 第 2、 聚乳酸-乙醇酸 PLGA的合成
以第 1步合成的寡聚乳酸-乙醇酸 OLGA为原料、 以肌酐为催化剂、 在减压下进行本 体熔融缩聚, 合成得到高度生物安全性的生物医用降解性聚乳酸-乙醇酸;
合成反应工艺条件及操作方法是: 向反应釜加入寡聚乳酸-乙醇酸、 催化剂肌酐, 控 制寡聚乳酸 -乙醇酸与肌酐的质量比为 100: 1-1000: 1, 将反应釜减压至 10 Torr, 升温至 150~190°C反应 40~170小时, 得到聚乳酸-乙醇酸;
合成反应式:
Figure imgf000007_0002
Mw 200-400 Mw 1.8-17.7 x 104
OLGA PLGA
2、 根据权利要求 1 所述的方法, 其特征在于所合成的聚乳酸-乙醇酸重均分子量为 1.8~17.7xl04, 并且聚合物可按实际要求的分子量在上述分子量范围内通过控制聚合反应 时间进行合成。
3、 权利要求 1所述方法合成的聚乳酸-乙醇酸的应用: 植入性硬组织修复材料、 手术 缝合线、 靶向及控释药物载体。
PCT/CN2011/081756 2011-06-30 2011-11-03 生物质肌酐催化共缩聚法合成聚乳酸-乙醇酸 WO2013000227A1 (zh)

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