WO1998008887A1 - Method for preparing poly-p-dioxanone polymer - Google Patents
Method for preparing poly-p-dioxanone polymer Download PDFInfo
- Publication number
- WO1998008887A1 WO1998008887A1 PCT/EP1997/004730 EP9704730W WO9808887A1 WO 1998008887 A1 WO1998008887 A1 WO 1998008887A1 EP 9704730 W EP9704730 W EP 9704730W WO 9808887 A1 WO9808887 A1 WO 9808887A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dioxanone
- poly
- reaction product
- product mixture
- reaction
- Prior art date
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
- 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
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/664—Polyesters containing oxygen in the form of ether groups derived from hydroxy carboxylic acids
Definitions
- This invention relates to the preparation of poly-p- dioxanone.
- the invention relates to the preparation of high molecular weight poly-p-dioxanone in the melt .
- p-Dioxanone is known to be readily polymerized in the solid state below the melting point (about 110 °C) of the polymer. With active polymerization catalysts such as aluminium and zinc complexes, high molecular weight polymer can be obtained with conversions of p-dioxanone monomer to polymer approaching 100%.
- poly-p-dioxanone is prepared m a process comprising: (a) heating a reaction mixture comprising p-dioxanone and an effective amount of a polymerization catalyst under conditions of temperature and pressure effective to produce a reaction product mixture comprising molten poly-p-dioxanone and unreacted p-dioxanone;
- the starting monomer for preparation of the desired high molecular weight poly-p-dioxanone is an optionally alkyl-substituted 2-p-d ⁇ oxanone according to the formula
- each of R ⁇ _ and R2 can be H or C1-3 alkyl.
- the monomer can be prepared, for example, by the oxidative dehydrogenation of dialkylene glycols such as diethylene glycol. To prepare high molecular weight polymer, it s desirable to use monomer of a purity of at least about 98%. Such purity can generally be achieved by distillation.
- poly-p-dioxanone shall refer to polymers comprising p-dioxanone monomer units and up to about 40 mole percent other cyclic lactone comonomer units.
- the polymerization reaction is carried out m the presence of an effective amount of a polymerization catalyst.
- Suitable polymerization catalysts include, for example, organo tin compounds such as dibutyl tin oxide, dibutyl tin dilaurate and dibutyl tin d ⁇ -2-ethylhexanoate (U.S. 3,645,941), organozinc compounds such as diethyl zinc (U.S. 3,063,968) and organoalumimum compounds such as t ⁇ isobutyl aluminium (U.S. 3,063,967).
- the preferred polymerization catalyst for the invention melt polymerization process is tin octoate.
- the catalyst is present in the polymerization reaction mixture in an amount within the range of 0.0001 to 3, preferably 0.007 to 0.08 weight percent, based on the weight of the monomer.
- the polymerization reaction can be carried out at a pressure generally within the range of 5 to 500 kPa (0.05 to 5 atmospheres), preferably 50 to 200 kPa (0.5 to 2 atm. ) .
- the polymerization reaction temperature is a temperature higher than the melting temperature of the target polymer. For poly-p- dioxanone, the polymerization temperature will range from 110 to 175 °C, preferably 120 to 150 °C .
- the poly- merization reaction is preferably carried out in a stirred reactor vessel under an inert or reducing atmosphere such as nitrogen, argon or hydrogen.
- the polymerization can be carried out continuously or batchwise, m a single vessel or a series of two or more reactors. Reaction time can vary depending upon catalyst concentration, temperature, pressure and other reaction variables, but will generally range within 0.5 to 5 hours .
- a cyclic anhydride is added to the reaction product mixture in an amount sufficient to react with a majority of the polymer endgroups.
- the cyclic anhydride will generally be added in an amount of 2 mole percent or less, preferably within the range of 0.0001 to 0.1 mole percent, based on the original amount of p-dioxanone monomers.
- cyclic anhydride refers to a compound having the chemical moiety
- Such compounds include pyromellitic anhydride, phthalic anhydride, maleic anhydride, diglycolic anhydride and ltaconic anhydride.
- the currently preferred cyclic anhydride s pyromellitic anhydride.
- the reaction product mixture is maintained under conditions suitable for the cyclic anhydride to react witn the majority of the polymer en ⁇ groups present, generally a temperature within the range of 60 to 150 °C for a time of 0.5 to 3 hours.
- the reaction product mixture is then exposed to reduced pressure, preferably 47 to 0.0001 kPa (350 to
- the end-capped poly-p-dioxanone is removed from the polymerization vessel and formed into particles such as nibs, chips, pellets and the like.
- this process is carried out by pumping the molten mixture from the reactor into a screw extruder, and extruding, cooling, solidifying and then dividing the mixture into solid particles.
- the poly-p-dioxanone preparation process can be described by reference to the Figure. Shown is a con- tmuous process in which two polymerization reactors are operated in series. P-dioxanone monomer, with any desired comonomer, and the polymerization catalyst in optional solvent are introduced into stirred reactor vessel 3 via conduits 1 and 2, respectively. The contents of the reactor are heated above the melting temperature of the desired polymer or copolymer to a monomer conversion of 25 to 50 mole percent.
- the molten reaction product mixture containing poly- p-dioxanone, unreacted p-dioxanone and catalyst is transferred via conduit 4 to a second stirred reactor 5, wherein polymerization is continued in the melt to greater conversion and higher molecular weight.
- the poly- p-dioxanone is reacted with cyclic anhydride introduced via conduit 6 to produce an end-capped poly-p-dioxanone .
- the molten reaction product mixture 7 containing end- capped poly-p-dioxanone, up to about 30 weight percent p- dioxanone and catalyst residue is cooled and passed to vessel 8 wherein volatiles including unreacted p-dioxa- none are removed by, for example, evaporation or distillation under reduced pressure. Unreacted monomer may be recycled via conduit 9 to the initial polymerization reactor. End-capped polymer may be passed via conduit 10 to extruder 11 for cooling and formation into pellets .
- the molecular weight average of the product poly-p- dioxanone will depend upon the desired application but will typically range from 50,000 to 300,000. The polymerization can be carried out in batch or continuous form.
- the poly-p-dioxanone polymer prepared in the invention process can be used in coatings, films, moulding powders and fibres, particularly where degradability or biodegradability is desired.
- Example 1 Polymerization of Poly-p-D oxanone
- a standard polymerization kettle was charged with 50.06 g of p-dioxanone monomer and 0.15 ml of 0.33 M tin octoate in toluene. The mixture was heated to 125 °C for 5 hours and sampled for molecular weight determination. The number average molecular weight at this stage of the polymerization was 44,000.
- Example 2 Polymerization of p-Dioxanone A standard polymerization kettle was charged with
- a polymerization kettle was charged with 120.5 g of p-dioxanone monomer.
- a 0.55 ml aliquot of 0.2 M tin octoate solution in toluene was injected into the reactor at 60 °C, and the temperature was raised to 125 °C .
- the melt was thick and viscous.
- a sample of the melt was taken for H NMR and GPC analyses, which indicated 75% conversion of monomer to polymer with a number average molecular weight of 75,400.
- the melt was stirred for 1 hour. Vacuum was then applied and the melt was maintained at 125 °C for 5 hours under vacuum.
- the product was analyzed by GPC.
- the anhydride-capped polymer contained less than 2.7% monomer and had a number average molecular weight of 78,600.
- Example 3 The procedure of Example 3 was repeated with the exception that the vacuum was applied to the melt at 125 °C for a period of 2.5 hours. Before endcapping, the melt contained 67% polymer and 33% p-dioxanone monomer. The number average molecular weight of the polymer was 81,000. After vacuum removal of the monomer from the melt, the poly-p-dioxanone contained less than 2% monomer and had a number average molecular weight of 90,000.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002263578A CA2263578A1 (en) | 1996-08-30 | 1997-08-29 | Method for preparing poly-p-dioxanone polymer |
JP51129898A JP3194587B2 (en) | 1996-08-30 | 1997-08-29 | Method for producing poly-p-dioxanone polymer |
EP97944815A EP0923614A1 (en) | 1996-08-30 | 1997-08-29 | Method for preparing poly-p-dioxanone polymer |
AU46196/97A AU4619697A (en) | 1996-08-30 | 1997-08-29 | Method for preparing poly-p-dioxanone polymer |
BR9711242-9A BR9711242A (en) | 1996-08-30 | 1997-08-29 | Process for melt polymerization of p-dioxanone |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/697,805 | 1996-08-30 | ||
US08/697,805 US5652331A (en) | 1996-08-30 | 1996-08-30 | Method for preparing poly-p-dioxanone polymer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998008887A1 true WO1998008887A1 (en) | 1998-03-05 |
Family
ID=24802621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/004730 WO1998008887A1 (en) | 1996-08-30 | 1997-08-29 | Method for preparing poly-p-dioxanone polymer |
Country Status (8)
Country | Link |
---|---|
US (1) | US5652331A (en) |
EP (1) | EP0923614A1 (en) |
JP (1) | JP3194587B2 (en) |
KR (1) | KR100356763B1 (en) |
AU (1) | AU4619697A (en) |
BR (1) | BR9711242A (en) |
CA (1) | CA2263578A1 (en) |
WO (1) | WO1998008887A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0514166A (en) | 2004-08-09 | 2008-06-03 | Univ Michigan State | improved process for forming a poly (1,4-dioxan-2-one) copolymer with a cyclic ester monomer, process for forming a poly (1,4-dioxan-2-one) copolymer and a cyclic ester, process for forming a poly (1,4-dioxan-2-one) copolymer and a cyclic ester mixed with additional ingredients, anhydrous poly (1,4-dioxan-2-one) copolymer, and a copolymer of poly (1,4-dioxan-2-one) with a cyclic ester monomer |
CN109111566A (en) * | 2018-08-24 | 2019-01-01 | 南京普立蒙医疗科技有限公司 | A kind of preparation method of high-purity polydioxanone |
US11028222B2 (en) | 2018-11-28 | 2021-06-08 | Ethicon, Inc. | Advanced processing of absorbable poly(p-dioxanone) containing high level of p-dioxanone monomer |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1216828A (en) * | 1958-02-18 | 1960-04-27 | Inventa Ag | Process for the preparation of stabilized polyesters |
US3063967A (en) * | 1959-10-07 | 1962-11-13 | Gen Aniline & Film Corp | Polymers of 2-p-dioxanone and method for making same |
US3645941A (en) * | 1970-04-01 | 1972-02-29 | Eastman Kodak Co | Method of preparing 2-p-dioxanone polymers |
US4643191A (en) * | 1985-11-29 | 1987-02-17 | Ethicon, Inc. | Crystalline copolymers of p-dioxanone and lactide and surgical devices made therefrom |
US4653497A (en) * | 1985-11-29 | 1987-03-31 | Ethicon, Inc. | Crystalline p-dioxanone/glycolide copolymers and surgical devices made therefrom |
EP0710684A2 (en) * | 1994-11-02 | 1996-05-08 | MITSUI TOATSU CHEMICALS, Inc. | Preparation process of polyhydroxycarboxylic acid |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5321113A (en) * | 1993-05-14 | 1994-06-14 | Ethicon, Inc. | Copolymers of an aromatic anhydride and aliphatic ester |
-
1996
- 1996-08-30 US US08/697,805 patent/US5652331A/en not_active Expired - Fee Related
-
1997
- 1997-08-29 KR KR1019997001464A patent/KR100356763B1/en not_active IP Right Cessation
- 1997-08-29 CA CA002263578A patent/CA2263578A1/en not_active Abandoned
- 1997-08-29 AU AU46196/97A patent/AU4619697A/en not_active Abandoned
- 1997-08-29 WO PCT/EP1997/004730 patent/WO1998008887A1/en not_active Application Discontinuation
- 1997-08-29 JP JP51129898A patent/JP3194587B2/en not_active Expired - Fee Related
- 1997-08-29 BR BR9711242-9A patent/BR9711242A/en not_active Application Discontinuation
- 1997-08-29 EP EP97944815A patent/EP0923614A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1216828A (en) * | 1958-02-18 | 1960-04-27 | Inventa Ag | Process for the preparation of stabilized polyesters |
US3063967A (en) * | 1959-10-07 | 1962-11-13 | Gen Aniline & Film Corp | Polymers of 2-p-dioxanone and method for making same |
US3645941A (en) * | 1970-04-01 | 1972-02-29 | Eastman Kodak Co | Method of preparing 2-p-dioxanone polymers |
US4643191A (en) * | 1985-11-29 | 1987-02-17 | Ethicon, Inc. | Crystalline copolymers of p-dioxanone and lactide and surgical devices made therefrom |
US4653497A (en) * | 1985-11-29 | 1987-03-31 | Ethicon, Inc. | Crystalline p-dioxanone/glycolide copolymers and surgical devices made therefrom |
EP0710684A2 (en) * | 1994-11-02 | 1996-05-08 | MITSUI TOATSU CHEMICALS, Inc. | Preparation process of polyhydroxycarboxylic acid |
Non-Patent Citations (1)
Title |
---|
CHRISTEN, H.R.: "Grundlagen der Org. Chem.Teil 1", 1977, SALLE, AARAU, XP002052000 * |
Also Published As
Publication number | Publication date |
---|---|
CA2263578A1 (en) | 1998-03-05 |
US5652331A (en) | 1997-07-29 |
AU4619697A (en) | 1998-03-19 |
EP0923614A1 (en) | 1999-06-23 |
BR9711242A (en) | 2000-08-08 |
KR100356763B1 (en) | 2002-10-18 |
JP2000516979A (en) | 2000-12-19 |
JP3194587B2 (en) | 2001-07-30 |
KR20000035816A (en) | 2000-06-26 |
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