WO2004041936A1 - 生分解性ポリエステル水性分散液およびその製造方法 - Google Patents
生分解性ポリエステル水性分散液およびその製造方法 Download PDFInfo
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- WO2004041936A1 WO2004041936A1 PCT/JP2003/014092 JP0314092W WO2004041936A1 WO 2004041936 A1 WO2004041936 A1 WO 2004041936A1 JP 0314092 W JP0314092 W JP 0314092W WO 2004041936 A1 WO2004041936 A1 WO 2004041936A1
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- Prior art keywords
- aqueous dispersion
- phbh
- aqueous
- copolymer
- dispersion
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- 239000006185 dispersion Substances 0.000 title claims abstract description 95
- 229920000229 biodegradable polyester Polymers 0.000 title claims abstract description 16
- 239000004622 biodegradable polyester Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002245 particle Substances 0.000 claims abstract description 27
- 229920001577 copolymer Polymers 0.000 claims abstract description 18
- HPMGFDVTYHWBAG-UHFFFAOYSA-N 3-hydroxyhexanoic acid Chemical compound CCCC(O)CC(O)=O HPMGFDVTYHWBAG-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 16
- 239000003995 emulsifying agent Substances 0.000 claims description 15
- 230000000813 microbial effect Effects 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- 244000005700 microbiome Species 0.000 claims description 11
- 238000010008 shearing Methods 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 3
- WHBMMWSBFZVSSR-UHFFFAOYSA-M 3-hydroxybutyrate Chemical compound CC(O)CC([O-])=O WHBMMWSBFZVSSR-UHFFFAOYSA-M 0.000 claims description 2
- WHBMMWSBFZVSSR-UHFFFAOYSA-N R3HBA Natural products CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011347 resin Substances 0.000 abstract description 17
- 229920005989 resin Polymers 0.000 abstract description 17
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 238000005452 bending Methods 0.000 abstract description 8
- 239000000853 adhesive Substances 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 101710108497 p-hydroxybenzoate hydroxylase Proteins 0.000 description 57
- 210000004027 cell Anatomy 0.000 description 27
- 239000000203 mixture Substances 0.000 description 19
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 8
- 239000010419 fine particle Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920000520 poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Polymers 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 241000607534 Aeromonas Species 0.000 description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 230000001580 bacterial effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229940005605 valeric acid Drugs 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000012258 culturing Methods 0.000 description 3
- 230000001804 emulsifying effect Effects 0.000 description 3
- -1 glycerin fatty acid ester Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- REKYPYSUBKSCAT-UHFFFAOYSA-N 3-hydroxypentanoic acid Chemical compound CCC(O)CC(O)=O REKYPYSUBKSCAT-UHFFFAOYSA-N 0.000 description 2
- 241000607516 Aeromonas caviae Species 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000252867 Cupriavidus metallidurans Species 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 241000589516 Pseudomonas Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 241000588986 Alcaligenes Species 0.000 description 1
- 241000793839 Aquaticitalea lipolytica Species 0.000 description 1
- 241000589151 Azotobacter Species 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 210000000712 G cell Anatomy 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 241000187654 Nocardia Species 0.000 description 1
- 235000019482 Palm oil Nutrition 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002540 palm oil Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 108010010718 poly(3-hydroxyalkanoic acid) synthase Proteins 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000002525 ultrasonication Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/05—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media from solid polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
Definitions
- the present invention relates to an aqueous biodegradable polyester dispersion and a method for producing the same, and more specifically, 3-hydroxybutyrate (hereinafter, referred to as 3HB) and 3-hydroxyhexanoate (hereinafter, referred to as 3HH).
- 3HB 3-hydroxybutyrate
- 3HH 3-hydroxyhexanoate
- the present invention relates to a biodegradable aqueous polyester dispersion containing a copolymer (hereinafter referred to as PHBH) and a method for producing the same.
- PHBH copolymer
- Aqueous dispersions of resins are widely used in paints, adhesives, textile processing, sheet / film processing, paper processing, etc., and are superior to solvent solutions in handling ease and work environment safety. Most of the resins in existing aqueous dispersions are non-biodegradable except for starch-based and rubber latex, and have the problem of having a large environmental burden in disposal.
- a water-based paper coating composition containing polylactic acid is manufactured by dissolving a resin in a solvent under heating to form a water-based dispersion of fine particles, crystallizing the resin, and then stirring the glass with glass beads at a high speed and pulverizing.
- a resin for example, Japanese Patent Application Laid-Open (See paragraph number [0008]).
- an aqueous dispersion of an aliphatic polyester emulsion is produced by mixing and kneading an aqueous solution of a resin in a molten state and an emulsifier (for example, JP-A-11-192712 (paragraph number [0006])). 2001-354841 (see paragraph [000 6]).
- there is a method of freezing and pulverizing the resin for example, JP-A-11-192712 (paragraph number [0006]).
- PHA microbial polyhydroxy alcohols
- PHB 3HB
- PHA 3HB and 3-hydroxyvalerate
- PHBV 3-hydroxyvalerate
- a coating film formed by applying an aqueous dispersion containing such a resin also has low elongation and becomes brittle.For example, when applied to a sheet, film or paper, a crack is formed by bending. There was a problem that occurred.
- An object of the present invention is to provide a method for easily producing an aqueous dispersion of finely divided biodegradable polyester without performing the method. Disclosure of the invention
- the flexural modulus is 100 to 1500 MPa
- a biodegradable polyester aqueous solution comprising a copolymer of 3HB and 3HH having a weight average molecular weight of 50,000 to 3,000,000 and having an average particle size of 0.1 to 50 m in an aqueous dispersion.
- a biodegradable polyester aqueous solution comprising a copolymer of 3HB and 3HH having a weight average molecular weight of 50,000 to 3,000,000 and having an average particle size of 0.1 to 50 m in an aqueous dispersion.
- the solid content concentration of the copolymer in the aqueous dispersion is preferably 5 to 70% by weight.
- the aqueous dispersion contains an emulsifier.
- the present invention provides the method wherein the copolymer is produced from a microorganism, and microbial cells containing the copolymer are crushed in an aqueous dispersion to separate the copolymer in the cells.
- the present invention relates to a method for producing an aqueous dispersion of a biodegradable polyester including a step.
- the method further includes a step of subjecting the aqueous dispersion to mechanical shearing to separate the partially aggregated copolymer particles from each other.
- the present invention comprises a copolymer of 3HB and 3HH, which has a flexural modulus of 100 to 1500 MPa and a weight average molecular weight of 50,000 to 3,000,000, and comprises an average particle of this copolymer in an aqueous dispersion.
- the present invention relates to a biodegradable aqueous polyester dispersion having a diameter of 0.1 to 50 im.
- the copolymer may be obtained by any method of producing from a microorganism or chemical synthesis, and is not particularly limited. Among them, PHBH produced from a microorganism is preferable because it is a fine particle.
- Microorganisms that produce PHBH are not particularly limited as long as they are microorganisms that accumulate PHBH in cells.
- Alcaligenes such as A. lipolytica, A. eutrophus, and A.1 atus, and Pseudomonas ( Pseudomonas) Bacillus genus, Azotobacter genus, Nocardia genus, Aeromonas genus Bacteria.
- strains such as aeromonas and biebies, and also alkalinegenes' eutrophas AC32 (Accession No. FERM BP-
- the carbon source and culture conditions used for the culture can be in accordance with the methods described in JP-A-5-93049 and JP-A-2001-340078, but are not limited thereto.
- the composition of 3HH was measured by NMR analysis of the powder obtained by centrifuging the aqueous dispersion and drying.
- the microbial PHBH thus obtained is a random copolymer.
- select cells select carbon source as a raw material
- blend PHBH with different 3HH composition blend 3HB homopolymer, etc.
- the flexural modulus of PHBH is from 100 to 150 OMPa. 200-1300 MPa is preferred, and 200-1000 MPa is more preferred. Even if the flexural modulus is less than 10 OMPa, it is not too soft, but crystallization slows down in relation to the 3HH composition. If it exceeds 150 OMPa, the rigidity of the resin increases and the PHBH coating during processing becomes too hard.
- the value of the flexural modulus is a value obtained by measuring a press sheet produced from a PHBH powder obtained from an aqueous dispersion in accordance with JIS K7171. PHBH weight average molecular weight
- Mw is 50,000 to 3,000,000. Mw is preferably 100,000 to 2,000,000. If the Mw is less than 50,000, the coating formed from the aqueous dispersion containing PHBH becomes too brittle and is not suitable for practical use. If the amount exceeds 3,000,000, the viscosity of the aqueous dispersion containing PHBH becomes too high to make processing such as coating difficult, and the formed coating film has defects due to voids.
- the above-mentioned Mw is obtained by centrifuging an aqueous dispersion containing PHBH and then drying the obtained powder, using chloroform as an eluent, and using gel permeation chromatography (GPC) to obtain a polystyrene-equivalent molecular weight distribution. It refers to the measured value.
- the average particle size of PHBH in the aqueous dispersion of the present invention is from 0.1 to 50 m.
- the average particle size is preferably from 0.5 to 10 m. If the average particle size is less than 0.1 / m, it is difficult when PHBH is produced by microorganisms, and when it is obtained by a chemical synthesis method, an operation of forming fine particles is required. If the average particle size exceeds 50 m, the surface becomes uneven when the aqueous dispersion containing PHBH is applied.
- the average particle size of PHBH is adjusted to a predetermined concentration of the aqueous suspension of PHBH using a general-purpose particle size analyzer such as Microtrac particle sizer (Nikkiso Co., Ltd., FRA), and corresponds to 50% accumulation of all particles with normal distribution Particle size.
- the solid concentration of PHBH in the aqueous dispersion is preferably 5 to 70% by weight, more preferably 10 to 50% by weight. If the solid content is less than 5% by weight, the formation of a coating film tends to be unsuccessful. If it exceeds 70% by weight, the viscosity of the aqueous dispersion becomes too high, and the coating tends to be difficult.
- the aqueous dispersion of the present invention is relatively stable without adding an emulsifier because the particle size of the polymer is small, but it preferably contains an emulsifier to further stabilize the dispersion.
- the emulsifier include anionic surfactants such as sodium lauryl sulfate and sodium oleate, cationic surfactants such as lauryl trimethyl ammonium chloride, and nonionic surfactants such as glycerin fatty acid ester and sorbin fatty acid ester.
- water-soluble polymers such as polyvinyl alcohol and polyvinyl pyrrolidone.
- the amount of the emulsifier added is preferably 1 to 10% by weight based on the solid content of PHBH.
- the amount of the emulsifier is less than 1% by weight, the stabilizing effect of the emulsifier tends to be hardly exerted. If the amount exceeds 10% by weight, the emulsifier is mixed into the polymer in a large amount, which tends to cause deterioration in physical properties and coloring. .
- the emulsifier can be added to the aqueous dispersion after microbial cell disruption and alkali treatment, centrifugation and water washing. When methanol washing is performed, it can be added before or after adjusting the solid content concentration by adding an appropriate amount of water after the methanol washing.
- the aqueous dispersion of the present invention may contain pigments, plasticizers, tackifiers, fillers, chemicals, and the like, if necessary.
- the method for producing the aqueous biodegradable polyester dispersion of the present invention preferably includes a step of crushing the microbial cells in an aqueous dispersion state to separate PHBH in the cells.
- PHBH is dissolved using an organic solvent such as chloroform, and the PHBH is precipitated and recovered with a PHBH-insoluble solvent such as methanol or hexane.
- a PHBH-insoluble solvent such as methanol or hexane.
- crushing and adding alkali can be performed simultaneously while stirring the microbial cells containing PHBH.
- the advantage of this method is that the viscosity of the dispersion liquid can be prevented from increasing due to cell components other than PHBH leaked from the microbial cells, and the pH can be controlled by preventing the viscosity of the cell dispersion liquid from increasing.
- the process can be carried out at a low concentration by adding continuously or intermittently, and a reduction in the molecular weight of PHBH can be suppressed, and high-purity PHBH can be separated.
- the pH of the bacterial cell dispersion after the addition of alkali is preferably 9 to 13.5. If the pH is lower than 9, PHBH tends to be difficult to separate from the cells. When the pH exceeds 13.5, the decomposition of PHBH tends to increase.
- Microbial cells can be disrupted by ultrasonication or by using an emulsifying and dispersing machine, a high-pressure homogenizer, or a mill.
- PHBH emulsifying and dispersing machine
- a high-pressure homogenizer emulsifying and dispersing machine
- nucleic acids that mainly cause viscosity increase are efficiently disrupted
- insoluble substances other than polymers such as cell walls, cell membranes, and insoluble proteins, are sufficiently dispersed.
- an emulsifying and dispersing machine such as Silverson Mixer (manufactured by Silverson), Clear Mix (manufactured by Emtech), and Ebara Milder (manufactured by Ebara) in view of the possibility. Not something.
- Preferred temperature conditions for crushing the microbial cells and adding the alkali are in the range of room temperature to 50 :. If the temperature condition exceeds 50, the PHBH polymer is likely to decompose, so that around room temperature is preferred. In addition, it is not economical to lower the temperature below room temperature because a cooling operation is required. A precipitate is obtained by centrifugation from the dispersion obtained by crushing and subjecting the microbial cells to centrifugation, washing the precipitate with water and, if necessary, methanol, and finally removing water. By adding an appropriate amount, an aqueous dispersion of PHB H having a desired solid content can be obtained.
- the method further includes a step of mechanically shearing the aqueous dispersion to separate partially aggregated PHBH particles from each other after the step.
- the application of mechanical shear is preferred in that it can eliminate agglomerates and provide a polymer aqueous dispersion having a uniform particle size.
- Mechanical shearing of the aqueous dispersion can be performed using a stirrer, a homogenizer, ultrasonic waves, or the like. At this point, aggregation of the polymer particles is not so strong, and therefore, it is preferable to use a conventional stirrer having a stirring blade from the viewpoint of simplicity.
- the microorganism used in this example was Alcaligenes eutrophus AC32 into which a PHA synthase gene derived from Aeromonas radiata was introduced (Accession number: FERM BP-6038 (Original deposit deposited on August 12, 1996) (Transferred from FERM P_ 15786) (March 7, 1997, National Institute of Advanced Industrial Science and Technology, Patent Organism Depositary, Address: 1-1-1, Tsukuba-Higashi, Ibaraki, Japan 1) Chuo 6) It is. This was cultured according to the method described in J. Bacteriol., 179, 482, p. 4830 (1997), using palm oil as a carbon source.
- the cultivation was carried out in a 3 L jar equipped with a stirrer at a temperature of 35 :, a stirring speed of 500 rpm, and a culturing time of 60 hours to obtain cells containing about 60% by weight of PHBH having a Mw of 100,000.
- the culture solution was centrifuged (5000 rpm, 10 minutes) to obtain paste-form cells, and water was added thereto to obtain an aqueous dispersion of 50 g cells L.
- the obtained aqueous dispersion of PHBH was centrifuged, and the flexural modulus of a press sheet produced from the powder obtained by drying was measured in accordance with JIS K7171.
- the flexural modulus was 120 OMPa.
- Example 1 Culture was carried out in the same manner as in Example 1 except that coconut oil was used as a carbon source to obtain an aqueous dispersion having a solid content of 20% by weight.
- the average particle size of PHBH in this aqueous dispersion was 1.69 / m.
- the powder obtained by drying this aqueous dispersion under reduced pressure had a 3HH composition of 10 mol% and an Mw of 760,000.
- the flexural modulus and the elongation at break of the coating film were measured in the same manner as in Example 1. Cracks in the folded part of the film and biodegradability were observed.
- the flexural modulus was 500 MPa.
- the breaking elongation of the coated film was 400%. Table 1 shows the results.
- Example 1 Culture was carried out in the same manner as in Example 1 except that coconut oil was used as a carbon source and the culture temperature was set to 3, to obtain an aqueous dispersion having a solid content of 20% by weight.
- the average particle size of PHBH in this aqueous dispersion was 1.95 im.
- the powder obtained by drying this aqueous dispersion under reduced pressure had a 3HH composition of 15 mol% and an Mw of 960,000.
- the bending elastic modulus and the elongation at break of the coating film were measured in the same manner as in Example 1, and cracks in the folded portion of the film and biodegradability were observed.
- the flexural modulus was 30 OMPa.
- the breaking elongation of the coated film was 760%. Table 1 shows the results.
- Example 1 3 parts by weight of a partially modified polyvinyl alcohol (Kuraray Co., Ltd., Kuraray Povar PVA205) was added as an emulsifier to the obtained aqueous dispersion having a solid concentration of 20% by weight, and the mixture was stirred for 30 minutes with a stirrer. By stirring, an aqueous dispersion containing an emulsifier was obtained.
- aqueous dispersions obtained in Example 1 and this example were left at room temperature for 3 months to compare the storage stability, the aqueous dispersion of Example 1 showed slight precipitation, In the aqueous dispersion of this example, no precipitate was observed and no change was observed.
- the aqueous dispersion obtained in Example 3 was placed in a 1 L vessel equipped with a stirrer, and stirred at a stirring speed of 500 rpm for 1 hour.
- the average particle size of PHBH in the obtained aqueous dispersion was 1.02 m, which was further atomized from the original average particle size of 1.9 m.
- Comparative Example 1 An aqueous dispersion of PHB having a solid content of 20% by weight was obtained in the same manner as in Example 1 except that butyric acid was used as a carbon source and the culture temperature was 30 ° C. The average particle size of PHB in this aqueous dispersion was 1.12 xm. The Mw of the powder obtained by drying this aqueous dispersion under reduced pressure was 600,000. Further, the bending elastic modulus and the breaking elongation of the coating film were measured in the same manner as in Example 1, and the cracks in the folded portion of the film and the biodegradability were observed. The flexural modulus was 260 OMPa. The breaking elongation of the coated film was 8%. Table 1 shows the results.
- Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Biodegradable polyester PHBH PHB PHB V
- the coated film obtained from the aqueous dispersion containing PHB H is flexible and has good elongation. It can be seen that when the film is folded, cracks are unlikely to occur in the folded portion.
- the PHBH-containing aqueous biodegradable polyester dispersion of the present invention has excellent film-forming properties and is flexible when applied to paints, adhesives, textile processing, sheet film processing, paper processing, etc. Gives a resin coating that is strong and easy to bend. Furthermore, when microbial PHBH is used, the PHBH can be crystallized by heating and dissolving the PHBH in a solvent, or by crushing the cells that have accumulated the PHBH in an aqueous system and separating the PHBH. An aqueous dispersion of fine particles can be easily obtained without mixing and kneading the aqueous solution of the emulsifier or freeze-grinding.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
- Paints Or Removers (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Polyesters Or Polycarbonates (AREA)
- Paper (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/533,381 US7491754B2 (en) | 2002-11-08 | 2003-11-05 | Aqueous dispersion of biodegradable polyester and process for preparing the same |
EP03810595.3A EP1566409B1 (en) | 2002-11-08 | 2003-11-05 | Aqueous dispersion of biodegradable polyester and method for production thereof |
AU2003277546A AU2003277546A1 (en) | 2002-11-08 | 2003-11-05 | Aqueous dispersion of biodegradable polyester and method for production thereof |
CA002503590A CA2503590A1 (en) | 2002-11-08 | 2003-11-05 | Aqueous dispersion of biodegradable polyester and process for preparing the same |
JP2004549611A JP4553733B2 (ja) | 2002-11-08 | 2003-11-05 | 生分解性ポリエステル水性分散液およびその製造方法 |
BR0315787-3A BR0315787A (pt) | 2002-11-08 | 2003-11-05 | Dispersão aquosa de poliéster biodegradável e processo para preparo do mesmo |
Applications Claiming Priority (2)
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---|---|---|---|
JP2002325984 | 2002-11-08 | ||
JP2002-325984 | 2002-11-08 |
Publications (1)
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WO2004041936A1 true WO2004041936A1 (ja) | 2004-05-21 |
Family
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Family Applications (1)
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PCT/JP2003/014092 WO2004041936A1 (ja) | 2002-11-08 | 2003-11-05 | 生分解性ポリエステル水性分散液およびその製造方法 |
Country Status (11)
Country | Link |
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US (1) | US7491754B2 (ja) |
EP (1) | EP1566409B1 (ja) |
JP (1) | JP4553733B2 (ja) |
CN (1) | CN1308395C (ja) |
AU (1) | AU2003277546A1 (ja) |
BR (1) | BR0315787A (ja) |
CA (1) | CA2503590A1 (ja) |
PL (1) | PL376558A1 (ja) |
RU (1) | RU2005117628A (ja) |
TW (1) | TW200418899A (ja) |
WO (1) | WO2004041936A1 (ja) |
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JPWO2006025375A1 (ja) * | 2004-08-31 | 2008-05-08 | 独立行政法人理化学研究所 | 熱安定性バイオポリエステル |
JP2016102152A (ja) * | 2014-11-28 | 2016-06-02 | 東レ株式会社 | ポリマー微粒子 |
JPWO2018070492A1 (ja) * | 2016-10-13 | 2019-07-25 | 株式会社カネカ | ポリヒドロキシアルカン酸の製造方法 |
WO2021075412A1 (ja) * | 2019-10-18 | 2021-04-22 | 株式会社カネカ | 水分散液およびその利用 |
JP2021535238A (ja) * | 2018-08-13 | 2021-12-16 | ダニマー・バイオプラスティックス・インコーポレーテッド | 水性pha分散液に基づく生分解性コーティング |
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WO2022264944A1 (ja) | 2021-06-16 | 2022-12-22 | 株式会社カネカ | 生分解性積層体及び、その製造方法 |
WO2023153277A1 (ja) | 2022-02-08 | 2023-08-17 | 株式会社カネカ | 生分解性積層体、その製造方法、および成形体 |
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ATE485341T1 (de) * | 2003-12-02 | 2010-11-15 | Kaneka Corp | Poly(3-hydroxyalkanoat)-zusammensetzung und formkörper daraus |
EP2702091B1 (en) | 2011-04-29 | 2019-02-13 | CJ CheilJedang Corporation | Process for latex production by melt emulsification |
US20160009914A1 (en) * | 2012-08-10 | 2016-01-14 | Synthomer (Uk) Limited | Method for producing an aqueous dispersion of poly(hydroxyalkanoates) |
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US20230091624A1 (en) * | 2020-01-29 | 2023-03-23 | Kaneka Corporation | Biodegradable polyester solution and use thereof |
KR20230048085A (ko) | 2020-07-30 | 2023-04-10 | 메레디언, 인크. | 생활용품 포장용 생물기반 소재 |
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- 2003-11-05 AU AU2003277546A patent/AU2003277546A1/en not_active Abandoned
- 2003-11-05 BR BR0315787-3A patent/BR0315787A/pt not_active Application Discontinuation
- 2003-11-05 EP EP03810595.3A patent/EP1566409B1/en not_active Expired - Lifetime
- 2003-11-05 CA CA002503590A patent/CA2503590A1/en not_active Abandoned
- 2003-11-05 WO PCT/JP2003/014092 patent/WO2004041936A1/ja active Application Filing
- 2003-11-05 JP JP2004549611A patent/JP4553733B2/ja not_active Expired - Fee Related
- 2003-11-05 RU RU2005117628/04A patent/RU2005117628A/ru not_active Application Discontinuation
- 2003-11-05 PL PL376558A patent/PL376558A1/pl not_active Application Discontinuation
- 2003-11-05 US US10/533,381 patent/US7491754B2/en not_active Expired - Lifetime
- 2003-11-05 CN CNB2003801027069A patent/CN1308395C/zh not_active Expired - Lifetime
- 2003-11-07 TW TW092131254A patent/TW200418899A/zh unknown
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US11459455B2 (en) | 2016-10-13 | 2022-10-04 | Kaneka Corporation | Method for producing polyhydroxyalkanoic acid |
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US11920030B2 (en) | 2016-10-13 | 2024-03-05 | Kaneka Corporation | Method for producing polyhydroxyalkanoic acid |
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JPWO2021075412A1 (ja) * | 2019-10-18 | 2021-04-22 | ||
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WO2022059592A1 (ja) * | 2020-09-17 | 2022-03-24 | 株式会社カネカ | 積層体及び成形体 |
WO2022244712A1 (ja) | 2021-05-17 | 2022-11-24 | 株式会社カネカ | 積層体、包装材料、及び容器 |
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JP7518960B1 (ja) | 2023-01-06 | 2024-07-18 | 日本製紙株式会社 | 塗工紙 |
Also Published As
Publication number | Publication date |
---|---|
EP1566409A1 (en) | 2005-08-24 |
EP1566409B1 (en) | 2016-06-29 |
US7491754B2 (en) | 2009-02-17 |
US20060258833A1 (en) | 2006-11-16 |
PL376558A1 (pl) | 2006-01-09 |
CN1308395C (zh) | 2007-04-04 |
JPWO2004041936A1 (ja) | 2006-03-09 |
CA2503590A1 (en) | 2004-05-21 |
BR0315787A (pt) | 2005-09-13 |
EP1566409A4 (en) | 2006-02-01 |
TW200418899A (en) | 2004-10-01 |
RU2005117628A (ru) | 2006-01-20 |
AU2003277546A1 (en) | 2004-06-07 |
JP4553733B2 (ja) | 2010-09-29 |
CN1711316A (zh) | 2005-12-21 |
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