WO2023195668A1 - 비스(글리콜)테레프탈레이트의 제조방법 및 이를 이용한 폴리에스테르 수지 - Google Patents
비스(글리콜)테레프탈레이트의 제조방법 및 이를 이용한 폴리에스테르 수지 Download PDFInfo
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- WO2023195668A1 WO2023195668A1 PCT/KR2023/003857 KR2023003857W WO2023195668A1 WO 2023195668 A1 WO2023195668 A1 WO 2023195668A1 KR 2023003857 W KR2023003857 W KR 2023003857W WO 2023195668 A1 WO2023195668 A1 WO 2023195668A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/02—Preparation of carboxylic acid esters by interreacting ester groups, i.e. transesterification
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/66—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
- C07C69/67—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids
- C07C69/675—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids of saturated hydroxy-carboxylic acids
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- 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
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- 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
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
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- 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
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/199—Acids or hydroxy compounds containing cycloaliphatic rings
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- 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
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
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- 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
- C08G63/78—Preparation processes
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- 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
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
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- 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
- C08J2367/06—Unsaturated polyesters
Definitions
- the present invention relates to the production of bis(glycol)terephthalate using recycled monomers and polyester resins and articles obtained therefrom.
- polyester Because polyester has excellent mechanical strength, heat resistance, transparency, and gas barrier properties, it is widely used as a material for beverage filling containers, packaging films, and audio and video films. In addition, polyester is widely produced around the world as an industrial material such as medical textiles and tire cords. In particular, polyester sheets and plates have good transparency and excellent mechanical strength, so they are widely used as materials for cases, boxes, partitions, shelves, panels, packaging, building materials, and interior and exterior materials.
- waste of plastics such as polyester is being generated annually worldwide at an unmanageable level, and recently, countries around the world are preparing regulations and measures for recycling waste plastic resources, including waste polyester.
- Physical or chemical methods are used to recycle waste polyester, but physical recycling methods cannot guarantee purity and are not widely applied.
- the chemical recycling method involves depolymerization by breaking the ester bonds of waste polyester, and reactions such as glycolysis, hydrolysis, methanolysis, and aminolysis. Use it.
- glycolysis is decomposition by adding glycol such as ethylene glycol or diethylene glycol to waste polyester at high temperature.
- glycol such as ethylene glycol or diethylene glycol
- BHET bis(2-hydroxyethyl)terephthalate
- PET waste polyethylene terephthalate
- Non-patent Document 1 Park, S.H., Kim, S.H. Poly (ethylene terephthalate) recycling for high value added textiles. Fashion and Textiles 1, 1 (2014)
- the present inventors have developed a method of recycling BHET obtained by depolymerization of waste PET-based products into various engineering polyester products or eco-friendly biodegradable polyester products without using excessive glycol and minimizing the generation of by-products. was sought.
- the object of the present invention is to produce high-purity bis(glycol)terephthalate using recycled BHET without adding excessive glycol and to provide various high-quality polyester resins and articles therefrom.
- G is the total number of moles of the one or more glycol components
- B is the total number of moles of the bis (2-hydroxyethyl) terephthalate.
- a polyester resin prepared according to the above method is provided.
- an article comprising the polyester resin is provided.
- bis(glycol)terephthalate which is a platform for various polymers, can be produced through a transesterification reaction between BHET and glycol.
- low-purity BHET can be produced by dividing or continuously adding a certain amount of BHET to the reaction compared to glycol. Purity can be increased even if a small amount of glycol is used, which is advantageous in terms of cost.
- the residual amount of ethylene glycol derivatives in bis(glycol)terephthalate recycled according to the present invention can be used to produce highly crystalline polyester resins, so that high-value engineering polyester products or ecotoxicity can be produced from waste PET products.
- the state can produce biodegradable polyester products with low ethylene glycol content.
- Figure 1 shows changes over time in the residual ratio of ethylene glycol derivatives depending on the input method during the transesterification reaction.
- the molecular weight of the compound or the molecular weight of the polymer described in this specification is a relative mass based on carbon-12 and is not stated in units, but the same value can be used as necessary. It may be understood as molar mass (g/mol).
- a “derivative” of a specific compound refers to a compound produced by partially modifying the compound through a chemical reaction or combining it with another component and containing the main portion of the compound.
- a unit or group “derived” from a specific component refers to a part of the component included in the final product after going through a chemical reaction such as polymerization, and a part of the component is modified or combined with another component during the reaction process. It can exist as For example, the chain constituting the polymer includes units or groups derived from one or more monomers.
- a method for producing bis(glycol)terephthalate which serves as a platform for various polymers, is provided through a transesterification reaction between bis(2-hydroxyethyl)terephthalate and glycol.
- the method for producing bis(glycol)terephthalate includes (1) adding one or more glycol components having 3 or more carbon atoms to a reactor; and (2) adding bis(2-hydroxyethyl)terephthalate separately or continuously to the reactor to perform a transesterification reaction.
- the glycol component used in the present invention is added to the transesterification reaction with bis(2-hydroxyethyl)terephthalate and constitutes the residue of the product bis(glycol)terephthalate, and is polymerized from the bis(glycol)terephthalate. It constitutes the polymer chain of the final polyester resin.
- the glycol component used in the present invention may be a glycol having 3 or more carbon atoms to replace the ethylene glycol residue in a transesterification reaction.
- the glycol component has a boiling point of 10°C or more higher than that of ethylene glycol, which is advantageous for purification through fractional distillation during the transesterification reaction.
- the glycol component used in the transesterification reaction of the present invention may be a glycol monomer other than ethylene glycol (e.g., alkylene glycol with 3 or more carbon atoms) or a polymer glycol (e.g., polyether).
- ethylene glycol e.g., alkylene glycol with 3 or more carbon atoms
- polymer glycol e.g., polyether
- the glycol component may be one or more types selected from glycol monomers containing 3 to 10 carbon atoms and having a molecular weight of less than 250, and polymer glycols having a number average molecular weight of 400 to 5000.
- the carbon number of the glycol monomer may be, for example, 3 or more or 4 or more, and may also be 15 or less, 12 or less, 10 or less, or 8 or less.
- the glycol monomer may be an alkylenediol having 3 to 10 carbon atoms.
- the diol may be an aliphatic alkylenediol.
- the glycol monomer is 1,3-propanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, 2-methyl-1,3-propanediol, 2-methylene-1,3-propane Diol, 2-ethyl-1,3-propanediol, 2-isopropyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 2,3-butanediol, 3-methyl-1, It may be selected from the group consisting of 5-pentanediol, 3-methyl-2,4-pentanediol, 1,6-hexanediol, 1,2-cyclohexanediol, 1,4-cyclohexanediol and diethylene glycol. .
- the glycol monomer includes one or more selected from 1,3-propanediol, 1,4-butanediol, and 1,4-cyclohexanedimethanol, and optionally further includes other glycol monomers. can do.
- the molecular weight of the glycol monomer may be, for example, less than 400, less than 350, less than 300, or less than 250.
- the polymer glycol includes, for example, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyhexamethylene glycol, copolymer of ethylene oxide and tetrahydrofuran, ethylene oxide-added polypropylene glycol, polycarbonate diol, polyneopentyl glycol, It may be selected from the group consisting of poly-3-methylpentanediol and poly-1,5-pentanediol. More specifically, the polymer glycol may be one or more selected from the group consisting of polytetramethylene glycol, polycarbonate diol, polypropylene glycol, and ethylene oxide-added polypropylene glycol.
- the number average molecular weight of the polymer glycol may be, for example, 400 or more, 500 or more, 600 or more, 700 or more, or 800 or more, and may also be 6000 or less, 5000 or less, 4000 or less, or 300 or less.
- the number average molecular weight of the polymer glycol may be 400 to 5000, and more specifically, 1000 to 3000 is advantageous in terms of reducing phase separation.
- the polymer glycol is used in an amount of 5% to 75% by weight, specifically 10% to 60% by weight, and more specifically 15% to 50% by weight, based on the weight of the final polyester resin. It is advantageous for achieving high molecular weight while improving elasticity.
- the ethylene glycol residue is replaced with a glycol residue having 3 or more carbon atoms through a transesterification reaction.
- Bis(2-hydroxyethyl)terephthalate is an ester of two ethylene glycols and one terephthalic acid.
- polyester such as polyethylene terephthalate (PET) through a polymerization reaction of ethylene glycol and terephthalic acid or its ester. It is a compound that is formed as an intermediate during the production process.
- Bis(2-hydroxyethyl)terephthalate used in the present invention may be obtained by depolymerization of waste polyester.
- the bis(2-hydroxyethyl)terephthalate can be obtained from waste polyester having ethylene glycol and terephthalic acid as repeating units, such as polyethylene terephthalate (PET) or glycol-modified polyethylene terephthalate (PETG), Specifically, it can be obtained by well-known depolymerization methods such as glycolysis, hydrolysis, and methanolysis.
- the bis(2-hydroxyethyl)terephthalate may be obtained by depolymerizing waste polyethylene terephthalate with ethylene glycol and then purifying it.
- BHET Bis(2-hydroxyethyl)terephthalate
- r-BHET or rBHET Bis(2-hydroxyethyl)terephthalate
- Impurities contained in the regenerated BHET may include, for example, diethylene glycol derivatives and unreacted monomers.
- the total content of impurities contained in the regenerated BHET may be 10 wt% or more, 15 wt% or more, or 20 wt% or more, and may also be 40 wt% or less, 35 wt% or less, 30 wt% or less, or 25 wt% or less. there is.
- the purity of the regenerated BHET can be measured using liquid chromatography or the like. Specifically, the purity of the regenerated BHET can be derived by measuring the fraction (%) of the BHET peak area out of the total peak area in a spectrum obtained using high-performance liquid chromatography (HPLC).
- the purity of the recycled BHET may be 90% or less, 85% or less, or 80% or less, and may also be 60% or more, 65% or more, or 70% or more.
- the purity of BHET introduced into the transesterification reaction of the present invention may be 60% to 90%, more specifically 65% to 85%, or 70% to 80%.
- an acid component can be additionally added during the transesterification reaction.
- one or more acid components selected from dicarboxylic acid, its ester, and anhydride may be additionally added to the reactor.
- the dicarboxylic acid may be at least one selected from aliphatic dicarboxylic acid and aromatic dicarboxylic acid.
- the dicarboxylic acid may include an aliphatic dicarboxylic acid.
- the aliphatic dicarboxylic acid may be linear, branched, or cyclic aliphatic dicarboxylic acid.
- the carbon number of the aliphatic dicarboxylic acid may be 4 or more, 5 or more, 6 or more, or 7 or more, and may also be 20 or less, 15 or less, 13 or less, 12 or less, or 10 or less.
- the aliphatic dicarboxylic acid may have 4 to 20 carbon atoms, or 4 to 12 carbon atoms.
- aliphatic dicarboxylic acids examples include adipic acid, sebacic acid, succinic acid, isodecylsuccinic acid, maleic acid, fumaric acid, glutaric acid, azelaic acid, 1,4-cyclohexanedicarboxylic acid, and 1,3-cyclohexanedicarboxylic acid. It may be selected from the group consisting of hexanedicarboxylic acid, but is not limited thereto.
- the dicarboxylic acid may include aromatic dicarboxylic acid.
- the carbon number of the aromatic dicarboxylic acid may be 6 or more, 7 or more, 8 or more, or 10 or more, and may also be 25 or less, 20 or less, or 15 or less.
- the aromatic dicarboxylic acid may have 8 to 20 carbon atoms, or 8 to 14 carbon atoms.
- aromatic dicarboxylic acid examples include terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid such as 2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid, 4,4'-stilbendicarboxylic acid, 2 , may be selected from the group consisting of 5-furandicarboxylic acid and 2,5-thiophenedicarboxylic acid, but is not limited thereto.
- the additional acid component may be a dicarboxylic acid other than terephthalic acid or an ester thereof, and may form a copolymerization unit with a unit derived from bis(2-hydroxyethyl)terephthalate during condensation polymerization after transesterification reaction. there is.
- the dicarboxylic acid can improve the biodegradability of the final polyester resin.
- adipic acid or its alkyl ester specifically dimethyl adipate
- the total amount of adipic acid and its alkyl ester used may be 70% to 99% by weight based on the weight of the total acid component.
- the dicarboxylic acid may further include an aliphatic dicarboxylic acid component other than adipic acid, an aromatic dicarboxylic acid component, or a mixture thereof.
- the total amount of dicarboxylic acid components other than adipic acid may be 1% to 30% by weight based on the weight of the total acid components.
- glycol and bis(2-hydroxyethyl)terephthalate undergo a transesterification reaction.
- m is an integer from 1 to 4.
- the transesterification reaction may be performed in the presence of a catalyst, and accordingly, the catalyst may be added together with the glycol component, acid component, or bis(2-hydroxyethyl)terephthalate into the reactor.
- the catalyst for the transesterification reaction may be, for example, one or more selected from the group consisting of titanium-based catalysts, germanium-based catalysts, antimony-based catalysts, aluminum-based catalysts, and tin-based catalysts.
- titanium-based catalyst examples include tetraethyl titanate, acetyltripropyl titanate, tetrapropyl titanate, tetrabutyl titanate, 2-ethylhexyl titanate, octylene glycol titanate, triethanolamine titanate, and acetylacetonate. Titanate, ethyl acetoacetic ester titanate, isostearyl titanate, titanium dioxide, etc. are mentioned.
- germanium-based catalyst examples include germanium dioxide, germanium tetrachloride, germanium ethylene glycoxide, germanium acetate, or combinations thereof. Specifically, germanium dioxide can be used as the germanium-based catalyst. This germanium dioxide can be either crystalline or amorphous, and glycol-soluble can also be used.
- the amount of the transesterification catalyst input may vary depending on the reaction conditions and the catalyst used, but as an example, a metal catalyst (e.g., titanium catalyst, tin catalyst) is added to the glycol and bis(2-hydroxyethyl)terephthalate introduced into the reactor.
- the metal catalyst may be added in an amount of 0.0001% to 0.005% by weight based on the total weight.
- the transesterification reaction can be performed in a batch or continuous manner.
- the glycol component, or the glycol component and the acid component are collectively added to the reactor and the temperature is raised, and when the temperature reaches a certain level, bis(2-hydroxyethyl)terephthalate can be added.
- the addition of the bis(2-hydroxyethyl)terephthalate may be performed, for example, in a nitrogen atmosphere at a temperature of 180°C to 280°C while removing ethylene glycol, a by-product.
- bis(2-hydroxyethyl)terephthalate is added separately or continuously to the transesterification reaction with the glycol component.
- bis(2-hydroxyethyl)terephthalate is divided and added two or more times to the transesterification reaction with the glycol component.
- the number of divided injections may be 2 or more, 3 or more, 4 or more, or 5 or more, and may also be 100 or less, 50 or less, 30 or less, 20 or less, 15 or less, or 10 or less. As a specific example, the number of divided injections may be 2 to 30 times, or 3 to 15 times.
- the time interval between the divided injections can be determined by dividing the total injection time by the number of divided injections.
- the total input time may be, for example, 1 hour or more or 2 hours or more, and may also be 5 hours or less or 4 hours or less.
- the one-time addition amount during the divided addition can be determined by dividing the total amount of bis(2-hydroxyethyl)terephthalate to be added to the reaction by the number of divided additions.
- the components introduced into the transesterification reaction satisfy the formula (1) below.
- G is the total number of moles of the one or more glycol components
- B is the total number of moles of the bis (2-hydroxyethyl) terephthalate.
- the G/B is less than 1.0, there are many ethylene glycol residues derived from BHET, which may impair the physical properties of the final polyester resin, and if the G/B is more than 3.5, an excessive amount of glycol component is added, which is not preferable.
- the G/B may be 1.0 or more, 1.5 or more, or 2.0 or more, and may also be 3.5 or less, 3.0 or less, or 2.5 or less.
- the G/B may be 1.0 to 3.0, 1.0 to 2.5, or 1.5 to 2.5.
- the number of divided inputs and the total input amount can be more effectively controlled by equation (2) below.
- the input ratio (R) value of bis(2-hydroxyethyl)terephthalate according to equation (2) below may be 5 or more.
- G is the total number of moles of the one or more glycol components
- B is the total number of moles of the bis (2-hydroxyethyl) terephthalate
- N is the bis (2-hydroxyethyl) This is the number of divided doses of terephthalate.
- the R value may be 5 or more, 6 or more, 8 or more, or 10 or more, and may also be 100 or less, 50 or less, 30 or less, or 20 or less, and specific examples include 4 to 50, or 6 to 30 days. You can.
- Figure 1 shows changes over time in the residual ratio of ethylene glycol derivatives depending on the input method during the transesterification reaction.
- bis(2-hydroxyethyl)terephthalate is continuously added to the transesterification reaction with the glycol component.
- the total time of the continuous injection may be, for example, 1 hour or more or 2 hours or more, and may also be 5 hours or less or 4 hours or less.
- the continuous addition may be to add a certain amount of bis(2-hydroxyethyl)terephthalate per hour, and the amount per hour is the total amount of bis(2-hydroxyethyl)terephthalate to be added to the reaction. It can be determined by dividing it by the total investment time.
- bis(2-hydroxyethyl)terephthalate is dissolved in water at about 80-100°C to prepare an aqueous BHET solution with a concentration of about 10-20% by weight, and continuous injection can be performed using this.
- the continuous addition can be performed from the start of the transesterification reaction until one hour before the completion of the reaction.
- a dropping funnel can be used at the laboratory level, and a fixed-quantity feeding device can be used at the commercial level.
- the reaction conditions can be maintained until the transesterification reaction is completed. Additionally, the process of removing ethylene glycol, a by-product, during the transesterification reaction can be continued.
- the removal of ethylene glycol can be performed through a distillation process using the difference in boiling point from other components, and the distilled ethylene glycol can be cooled, recovered, and then recycled for other processes.
- the end point of the transesterification reaction can be confirmed by considering the theoretical amount of ethylene glycol generated from bis(2-hydroxyethyl)terephthalate through the transesterification reaction or by the point at which by-product outflow no longer occurs.
- the pressure during the transesterification reaction may be, for example, 0.01 kg/cm2 or more, 0.05 kg/cm2 or more, or 0.1 kg/cm2 or more, and may also be 0.5 kg/cm2 or less, 0.3 kg/cm2 or less, or 0.2 kg/cm2 or less. It may be 1.5 kg/cm2 or less.
- the temperature during the transesterification reaction may be 140°C or higher, 160°C or higher, 180°C or higher, or 200°C or higher, and may also be 300°C or lower, 280°C or lower, 270°C or lower, 250°C or lower, or 220°C or lower.
- the transesterification reaction may be performed in a nitrogen atmosphere. As a specific example, the transesterification reaction can be performed in a nitrogen atmosphere at a pressure of 0.05 kg/cm2 to 0.2 kg/cm2 and a temperature of 180°C to 280°C.
- the transesterification reaction can be carried out at a temperature of 180°C or higher to smoothly remove ethylene glycol, a by-product generated during the transesterification reaction, and to reduce the loss of the glycol component to be replaced, at a temperature higher than the boiling point of the glycol component. It can be carried out at a temperature as low as 10°C.
- the temperature can be adjusted to 180°C to 220°C, or when 1,4-cyclohexanedimethanol is used, it can be adjusted to 200°C to 270°C.
- the products of the transesterification reaction mainly include bis(glycol)terephthalate and derivatives thereof in which the ethylene glycol residue in bis(2-hydroxyethyl)terephthalate is replaced with another glycol residue.
- the regenerated bis(glycol)terephthalate obtained by the transesterification reaction includes a compound represented by Formula 1 below.
- -O-R-OH is a group derived from a glycol component having 3 or more carbon atoms, and m is an integer of 1 to 4.
- R is a group derived from a glycol component having 3 or more carbon atoms, and is an alkylene group with 3 to 10 carbon atoms, or two or more identical or different alkylene groups with 3 to 10 carbon atoms are mediated by an ether group or carbonate group. It is a group connected by .
- the regenerated bis(glycol)terephthalate may contain two or more compounds represented by Formula 1, and may also include derivatives thereof.
- the product of the transesterification reaction may include unreacted products or by-products in addition to bis(glycol)terephthalate.
- the product of the transesterification reaction may include components derived from recycled bis(2-hydroxyethyl)terephthalate used as a starting material.
- the product of the transesterification reaction may include ethylene glycol and its derivatives.
- the ethylene glycol derivative may be ethylene glycol or a compound having a residue thereof, for example, an ester of ethylene glycol.
- the ethylene glycol derivatives include bis(2-hydroxyethyl)terephthalate, 2-hydroxyethyl terephthalate, 2-hydroxyethyl-4-hydroxybutyl terephthalate, bis(diethylene glycol)terephthalate, 2 - May include hydroxydiethyl-diethylene glycol terephthalate, 4-hydroxybutyl-diethylene glycol terephthalate, ethylene glycol, and oligomers thereof, and may mainly be bis(2-hydroxyethyl) terephthalate. there is.
- the total content of ethylene glycol and its derivatives present in the product of the transesterification reaction may be 20% by weight or less. Therefore, the total content of ethylene glycol and its derivatives in the recycled bis(glycol)terephthalate may be 20% by weight or less. For example, the total content of ethylene glycol and its derivatives in the recycled bis(glycol)terephthalate may be 15% by weight or less, 10% by weight or less, or 5% by weight or less.
- a highly crystalline polyester resin can be produced using the recycled bis(glycol)terephthalate of the present invention.
- a polyester resin can be produced by subjecting the product of the transesterification reaction (i.e., a mixture containing recycled bis(glycol) terephthalate) to a condensation polymerization reaction.
- the product of the transesterification reaction i.e., a mixture containing recycled bis(glycol) terephthalate
- the method for producing a polyester resin includes the steps of (1) adding at least one glycol component having 3 or more carbon atoms into a reactor; (2) performing a transesterification reaction by dividing or continuously adding bis(2-hydroxyethyl)terephthalate to the reactor; and (3) performing a condensation polymerization reaction on the product of the transesterification reaction, and the components introduced into the reactor satisfy the above formula (1).
- the transesterification reaction product includes a monomer or oligomer (dimer, trimer, etc.) of bis(glycol) terephthalate, and also contains excess glycol component remaining without participating in the transesterification reaction. More may be included.
- the monomer or oligomer of the bis(glycol)terephthalate is produced into a polyester resin through a condensation polymerization reaction under a catalyst, and glycol is generated as a by-product of the condensation polymerization reaction.
- n is an integer from 1 to 4
- n refers to the number of repeating units in the polymer chain.
- the condensation polymerization reaction can be performed, for example, by reacting the above transesterification reaction product at a temperature of 150°C to 300°C and reduced pressure of 0.01 mmHg to 600 mmHg for 1 hour to 24 hours.
- the temperature may be 150°C to 300°C, specifically 200°C to 290°C, and more specifically 260°C to 280°C.
- the pressure in the condensation polymerization reaction may be 0.01 mmHg to 600 mmHg, specifically 0.05 mmHg to 200 mmHg, and more specifically 0.1 mmHg to 100 mmHg.
- the temperature in the condensation polymerization reaction is less than 150°C, glycol, a reaction by-product, cannot be effectively removed from the system, and the intrinsic viscosity of the final reaction product may be low, which may lower the physical properties of the final polyester resin.
- the temperature If the temperature exceeds 300°C, the likelihood of yellowing occurring in the final polyester resin increases.
- the condensation polymerization reaction may be carried out for the required time until the intrinsic viscosity of the final reaction product reaches an appropriate level, for example, for an average residence time of 1 hour to 24 hours.
- the catalyst for the condensation polymerization reaction may be, for example, one or more selected from the group consisting of titanium-based catalysts, germanium-based catalysts, antimony-based catalysts, aluminum-based catalysts, and tin-based catalysts.
- titanium-based catalyst examples include tetraethyl titanate, acetyltripropyl titanate, tetrapropyl titanate, tetrabutyl titanate, 2-ethylhexyl titanate, octylene glycol titanate, triethanolamine titanate, and acetylacetonate. Titanate, ethyl acetoacetic ester titanate, isostearyl titanate, titanium dioxide, etc. are mentioned.
- germanium-based catalyst examples include germanium dioxide, germanium tetrachloride, germanium ethylene glycoxide, germanium acetate, or combinations thereof. Specifically, germanium dioxide can be used as the germanium-based catalyst. This germanium dioxide can be either crystalline or amorphous, and glycol-soluble can also be used.
- one or more glycol components and one or more acid components may be further added to the condensation polymerization reaction.
- the specific type of the additionally added glycol component may be the same as the one or more glycol components added to the reactor in step (1).
- the glycol component may be a glycol monomer (eg, alkylene glycol) or a polymer glycol (eg, polyether).
- the glycol component is 1,3-propanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, 2-methyl-1,3-propanediol, 2-methylene-1,3-propanediol , 2-ethyl-1,3-propanediol, 2-isopropyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 2,3-butanediol, 3-methyl-1,5 -Pentanediol, 3-methyl-2,4-pentanediol, 1,6-hexanediol, 1,2-cyclohexanediol, 1,4-cyclohexanediol, diethylene glycol, polyethylene glycol,
- an acid component may be additionally added in step (1) or (3).
- the acid component may be one or more types selected from dicarboxylic acids and esters thereof.
- the acid components include adipic acid, sebacic acid, succinic acid, isodecylsuccinic acid, maleic acid, fumaric acid, glutaric acid, azelaic acid, 1,4-cyclohexanedicarboxylic acid, and 1,3-cyclohexanedicar.
- ethylene glycol may be added as an additional glycol component to the condensation polymerization reaction, and terephthalic acid may be added as an additional acid component.
- a polyester resin prepared according to the above method is provided.
- the polyester resin is manufactured by condensation polymerization of regenerated bis(glycol)terephthalate obtained through transesterification reaction. Accordingly, the polyester resin includes units derived from components derived from the recycled bis(glycol)terephthalate.
- the recycled bis(glycol)terephthalate contains bis(glycol)terephthalate as well as unreacted glycol and acid components or by-products of ethylene glycol, units derived from these components undergo subsequent condensation polymerization. may be included in the polyester resin.
- the polyester resin includes units derived from one or more glycol components; and units derived from one or more acid components.
- the at least one glycol component may be the glycol monomer or polymer glycol exemplified above
- the at least one acid component may be the aliphatic dicarboxylic acid and aromatic dicarboxylic acid exemplified above.
- glycol component and acid component constituting the polyester resin are bis(2-hydroxyethyl)terephthalate and glycol components initially added for the production of polyester resin, or regenerated bis(glycol)terephthalate prepared therefrom, And it may be derived from an additionally added acid component.
- the polyester resin may be a homopolymer or copolymer resin.
- the polyester resin is polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polybutylene adipate-co-terephthalate (PBAT), and polypropylene adipate-co-terephthalate. (PPAT), polycyclohexanedimethyl terephthalate (PCT), and thermoplastic polyester elastomer (TPEE).
- the polyester resin may have a total content of ethylene glycol residues and diethylene glycol residues below a certain level.
- the polyester resin has a total content of ethylene glycol residues and diethylene glycol residues of 15 mol% or less, 10 mol% or less, 8 mol% or less, 7.5 mol% or less, 7 moles relative to the number of moles of the total glycol residues. % or less, 6 mol% or less, 5 mol% or less, 4 mol% or less, or 3 mol% or less.
- the total content of the ethylene glycol residue and diethylene glycol residue may be 0 mol% or more, 0.01 mol% or more, 0.02 mol% or more, or 0.03 mol% or more.
- the total content of ethylene glycol residues and diethylene glycol residues can be calculated by obtaining and analyzing the spectrum of the polyester resin with 1 H-NMR, and these residues are derived from ethylene glycol, diethylene glycol, and their derivatives. It may be.
- the polyester resin may have a total content of ethylene glycol residues and diethylene glycol residues measured by 1 H-NMR of 0.01 mol% to 10 mol% relative to the number of moles of the total glycol residues. Within the above content range, the crystallinity of the polyester resin may be improved, resulting in superior heat resistance and mechanical properties.
- the polyester resin may have an intrinsic viscosity of 0.5 dL/g to 1.5 dL/g at 35°C.
- the intrinsic viscosity of the polyester resin is 0.5 dL/g or more, 0.55 dL/g or more, 0.6 dL/g or more, 0.7 dL/g or more, 0.8 dL/g or more, 0.9 dL/g or more at 35°C, or 1.0 dL/g or more, and also 1.5 dL/g or less, 1.4 dL/g or less, 1.3 dL/g or less, 1.2 dL/g or less, 1.1 dL/g or less, 1.0 dL/g or less, or 0.7 dL/g. It may be less than g.
- the intrinsic viscosity of the polyester resin may be 0.55 to 1.1 dl/g, or 0.6 to 0.7 dl/g at 35°C.
- the polyester resin manufactured by the above-described method may not only be in the state of chips, pellets, or powder before molding, but may also be molded products formed by separate molding processes such as extrusion or injection, for example, in the form of films or sheets, or in various forms. It can take the form of various automotive, electrical and industrial injection parts.
- the present invention also provides an article containing the polyester resin.
- the polyester resin of the present invention can be used in high-value engineering polyester products or biodegradable polyester products with low ethylene glycol content that affects ecotoxicity.
- Step (2) Preparation of polyester resin through condensation polymerization reaction
- the pressure of the reactor was lowered from normal pressure to 5 Torr (absolute pressure: 5 mmHg) over 30 minutes, and at the same time, the temperature of the reactor was raised to 245°C over 1 hour, and the pressure of the reactor was raised to 1 Torr (absolute pressure: 1 mmHg).
- the condensation polymerization reaction was performed while maintaining the temperature below.
- the stirring speed was set fast, and as the condensation polymerization reaction progressed, the glycol component, a by-product, came out of the reactor, and the stirring force weakened due to an increase in the viscosity of the reactant, or the temperature of the reactant decreased to the set temperature. If it rises above this, the stirring speed was adjusted appropriately.
- the condensation polymerization reaction was carried out until the intrinsic viscosity (IV) of the mixture (melt) in the reactor reached 0.75 to 0.85 dl/g.
- IV intrinsic viscosity
- the mixture was discharged outside the reactor and made into strands. This was solidified with a cooling liquid and then granulated to an average weight of about 12 to 14 mg to obtain 109.7 g of polyester resin.
- step (1) 111.7 g of 1,4-cyclohexanedimethanol (CHDM) was added as a glycol component and 127.0 g of BHET was added in 6 portions, and during transesterification reaction The final temperature was set to 260°C, and the final temperature during the condensation polymerization reaction in step (2) was adjusted to 295°C to obtain a polyester resin.
- CHDM 1,4-cyclohexanedimethanol
- step (1) 127.0 g of BHET was added in eight portions to obtain a polyester resin.
- step (1) 127.0 g of BHET was added in 12 divided doses to obtain a polyester resin.
- step (1) 127.0 g of BHET was dissolved in 850 g of purified water at 90° C. to prepare a 13% by weight BHET aqueous solution, followed by using a dropping funnel for 4 hours.
- a polyester resin was obtained by continuously adding the BHET aqueous solution at a constant rate of 4.07 g/min.
- step (1) 93.1 g of 1,3-propanediol (PDO) was added as the glycol component and 127.0 g of BHET was added in four divided doses, and the final reaction during the transesterification reaction was added.
- the temperature was set to 200°C, and the final temperature during the condensation polymerization reaction in step (2) was adjusted to 245°C to obtain a polyester resin.
- step (1) 95.6 g of 1,4-butanediol (BD) and 87.9 g of polytetramethylene glycol (PTMG, Mn 1000) were added as glycol components, and during transesterification reaction The final temperature was set to 220°C, and the final temperature during the condensation polymerization reaction in step (2) was adjusted to 245°C to obtain a polyester resin.
- BD 1,4-butanediol
- PTMG polytetramethylene glycol
- step (1) 95.6 g of 1,4-butanediol (BD) and 87.9 g of poly-1,3-propylene glycol (PO3G, Mn 1000) were added as glycol components to obtain poly. An ester resin was obtained.
- BD 1,4-butanediol
- PO3G, Mn 1000 poly-1,3-propylene glycol
- step (1) 72.0 g of 1,4-butanediol (BD) was added as a glycol component, 63.5 g of BHET was added in four divided doses, and adipic acid was added as an additional acid component. (AA) 36.5 g was added to obtain a polyester resin.
- BD 1,4-butanediol
- AA adipic acid
- Example 10 The same procedure as Example 10 was repeated, except that 60.8 g of 1,3-propanediol (PDO) was added as a glycol component in step (1) to obtain a polyester resin.
- PDO 1,3-propanediol
- step (1) BHET was initially added together with 1,4-butanediol (BD) to obtain a polyester resin.
- BD 1,4-butanediol
- step (1) BHET was initially added together with 1,4-cyclohexanedimethanol (CHDM) to obtain a polyester resin.
- CHDM 1,4-cyclohexanedimethanol
- step (1) BHET was initially added together with polytetramethylene glycol (PTMG, Mn 1000) to obtain a polyester resin.
- PTMG polytetramethylene glycol
- step (1) BHET was initially added together with 1,3-propanediol (PDO) to obtain a polyester resin.
- PDO 1,3-propanediol
- step (1) BHET was initially added together with 1,4-butanediol (BD) and adipic acid (AA) to obtain a polyester resin.
- BD 1,4-butanediol
- AA adipic acid
- step (1) BHET was initially added together with 1,3-propanediol (PDO) and adipic acid (AA) to obtain a polyester resin.
- PDO 1,3-propanediol
- AA adipic acid
- glycol/rBHET ratio (G/B) in equation (1) below and the rBHET input ratio (R) in equation (2) below were calculated and shown in Table 1 below.
- G is the total number of moles of the one or more glycol components
- B is the total number of moles of the bis (2-hydroxyethyl) terephthalate.
- G is the total number of moles of the one or more glycol components
- B is the total number of moles of the bis (2-hydroxyethyl) terephthalate
- N is the bis (2-hydroxyethyl) This is the number of divided doses of terephthalate.
- Test Example 1 Purity of r-BHET
- r-BHET The purity of r-BHET obtained in Preparation Example 1 was measured by diluting 0.01 g of sample in 20 mL each of methanol or chloroform using liquid chromatography, and integrating the peak area through the measured spectrum to determine the total r-BHET As a result of analyzing the component content (area %), it was confirmed that BHET was 75-80%, and other oligomers, DEG derivatives, and unreacted monomers were 20-25% in total.
- a solution was obtained by dissolving polyester resin at a concentration of 0.12% in orthochlorophenol (OCP) at 150°C, and the intrinsic viscosity was measured using an Ubbelrod-type viscometer in a constant temperature bath at 35°C. Specifically, the temperature of the viscosity tube was maintained at 35°C, and the time taken for the solvent to pass between specific internal sections of the viscosity tube (efflux time) and the time it took for the solution to pass were measured to determine specific viscosity. ) was obtained, and the intrinsic viscosity was calculated using this.
- OCP orthochlorophenol
- the polyester resin was dried under reduced pressure at 50°C for 15 hours, melted and quenched, and then tested by raising the temperature at 10°C/min in a differential scanning calorimeter (DSC, TA Instruments). The highest point of the endothermic peak due to melting of the resin was taken as the melting point (Tm), and the heat of fusion ( ⁇ H f ) was calculated through the area of this endothermic peak.
- Examples 1 to 11 according to the present invention were subjected to transesterification reaction with divided or continuous addition under conditions that satisfied the rBHET input ratio (R) value of 5 or more to form EG and EG in the final polyester resin.
- the total content of DEG residues was low, within 10 mol%.
- Comparative Examples 1 to 7 rBHET was added in batches to perform a transesterification reaction, and the total content of EG and DEG residues in the final polyester resin was high, exceeding 10 mol%.
- the polyester resin of the example has a higher melting point (T m ) and heat of fusion ( ⁇ H f ) than the polyester resin of the comparative example prepared by adding the same glycol/rBHET ratio (G/B), resulting in higher crystallinity. I could see that it was excellent.
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Abstract
Description
Claims (15)
- (1) 반응기에 탄소수 3 이상인 1종 이상의 글리콜 성분을 투입하는 단계; 및(2) 상기 반응기에 비스(2-히드록시에틸)테레프탈레이트를 분할 또는 연속 투입하여 에스테르 교환 반응하는 단계를 포함하고,아래 식 (1)을 만족하는, 비스(글리콜)테레프탈레이트의 제조방법:1.0 ≤ G/B ≤ 3.5 ... (1)상기 식 (1)에서G는 상기 1종 이상의 글리콜 성분의 총 몰 수이고,B는 상기 비스(2-히드록시에틸)테레프탈레이트의 총 몰 수이다.
- 제 1 항에 있어서,상기 단계 (1)에서 글리콜 성분은 3개 내지 10개의 탄소 원자를 포함하고 분자량 250 미만인 글리콜 모노머, 및 수평균분자량 400 내지 5000의 고분자 글리콜 중에서 선택되는 1종 이상인, 비스(글리콜)테레프탈레이트의 제조방법.
- 제 1 항에 있어서,상기 단계 (1)에서 반응기에 디카르복실산, 이의 에스테르 및 무수물 중에서 선택되는 1종 이상의 산 성분을 추가로 투입하는, 비스(글리콜)테레프탈레이트의 제조방법.
- 제 3 항에 있어서,상기 디카르복실산은 지방족 디카르복실산을 포함하는, 비스(글리콜)테레프탈레이트의 제조방법.
- 제 1 항에 있어서,상기 단계 (2)에서 투입하는 비스(2-히드록시에틸)테레프탈레이트의 순도가 60% 내지 90%인, 비스(글리콜)테레프탈레이트의 제조방법.
- 제 1 항에 있어서,상기 비스(2-히드록시에틸)테레프탈레이트가 폐 폴리에스테르의 해중합에 의해 수득된 것인, 비스(글리콜)테레프탈레이트의 제조방법.
- 제 1 항에 있어서,상기 단계 (2)에서 상기 비스(2-히드록시에틸)테레프탈레이트의 투입이, 180℃ 내지 280℃의 온도의 질소 분위기에서 부산물인 에틸렌글리콜을 제거하며 수행되는, 비스(글리콜)테레프탈레이트의 제조방법.
- (1) 반응기에 탄소수 3 이상인 1종 이상의 글리콜 성분을 투입하는 단계;(2) 상기 반응기에 비스(2-히드록시에틸)테레프탈레이트를 분할 또는 연속 투입하여 에스테르 교환 반응하는 단계; 및(3) 상기 에스테르 교환 반응의 생성물을 축중합 반응하는 단계를 포함하고,아래 식 (1)을 만족하는, 폴리에스테르 수지의 제조방법:1.0 ≤ G/B ≤ 3.5 ... (1)상기 식 (1)에서G는 상기 1종 이상의 글리콜 성분의 총 몰 수이고,B는 상기 비스(2-히드록시에틸)테레프탈레이트의 총 몰 수이다.
- 제 9 항에 있어서,상기 단계 (1)에서 1종 이상의 글리콜 성분은1,3-프로판디올, 1,4-부탄디올, 1,4-사이클로헥산디메탄올, 2-메틸-1,3-프로판디올, 2-메틸렌-1,3-프로판디올, 2-에틸-1,3-프로판디올, 2-이소프로필-1,3-프로판디올, 2,2-디메틸-1,3-프로판디올, 2,3-부탄디올, 3-메틸-1,5-펜탄디올, 3-메틸-2,4-펜탄디올, 1,6-헥산디올, 1,2-사이클로헥산디올, 1,4-사이클로헥산디올, 디에틸렌글리콜, 폴리에틸렌글리콜, 폴리프로필렌글리콜, 폴리테트라메틸렌글리콜, 폴리헥사메틸렌글리콜, 에틸렌옥사이드와 테트라하이드로퓨란의 공중합체, 에틸렌옥사이드 부가 폴리프로필렌글리콜, 폴리카보네이트디올, 폴리네오펜틸글리콜, 폴리-3-메틸펜탄디올 및 폴리-1,5-펜탄디올로 이루어진 군에서 선택되는, 폴리에스테르 수지의 제조방법.
- 제 9 항에 있어서,상기 단계 (1) 또는 (3)에서 산 성분을 추가로 투입하고,상기 산 성분은 아디프산, 세바식산, 숙신산, 이소데실숙신산, 말레산, 푸마르산, 글루타릭산, 아젤라산, 1,4-사이클로헥산디카르복실산, 1,3-사이클로헥산디카르복실산, 테레프탈산, 이소프탈산, 나프탈렌디카르복실산, 디페닐디카르복실산, 4,4'-스틸벤디카르복실산, 2,5-퓨란디카르복실산 및 2,5-티오펜디카르복실산으로 이루어진 군에서 선택되는, 폴리에스테르 수지의 제조방법.
- 제 9 항 내지 제 11 항 중 어느 한 항에 따른 방법으로 제조되는 폴리에스테르 수지.
- 제 12 항에 있어서,상기 폴리에스테르 수지는1H-NMR로 측정한 에틸렌글리콜 잔기 및 디에틸렌글리콜 잔기의 합계 함량이, 전체 글리콜 잔기의 몰 수 대비 0.01 몰% 내지 10 몰%인, 폴리에스테르 수지.
- 제 12 항에 있어서,상기 폴리에스테르 수지의 고유점도는 35℃에서 0.5 dL/g 내지 1.5 dL/g 인, 폴리에스테르 수지.
- 제 12 항에 따른 폴리에스테르 수지를 포함하는, 물품.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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MX2024009360A MX2024009360A (es) | 2022-04-05 | 2023-03-23 | Metodo para preparar tereftalato de bis(glicol) y resina de poliester usando el mismo. |
US18/724,617 US20250066283A1 (en) | 2022-04-05 | 2023-03-23 | Method for preparing bis(glycol)terephthalate and polyester resin using same |
JP2024539391A JP2025510460A (ja) | 2022-04-05 | 2023-03-23 | ビス(グリコール)テレフタラート及びそれを使用するポリエステル樹脂を調製するための方法 |
EP23784896.5A EP4458801A1 (en) | 2022-04-05 | 2023-03-23 | Method for preparing bis(glycol)terephthalate and polyester resin using same |
CN202380019981.1A CN118647596A (zh) | 2022-04-05 | 2023-03-23 | 对苯二甲酸二(乙二醇)酯及使用其的聚酯树脂的制备方法 |
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KR1020220042550A KR20230143522A (ko) | 2022-04-05 | 2022-04-05 | 비스(글리콜)테레프탈레이트의 제조방법 및 이를 이용한 폴리에스테르 수지 |
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EP (1) | EP4458801A1 (ko) |
JP (1) | JP2025510460A (ko) |
KR (1) | KR20230143522A (ko) |
CN (1) | CN118647596A (ko) |
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JP2000169623A (ja) * | 1998-12-10 | 2000-06-20 | Is:Kk | ポリエチレンテレフタレ―ト廃棄物のケミカルリサイクル方法 |
KR20010095884A (ko) * | 2000-04-12 | 2001-11-07 | 빌.씨. 첸(Bill. C. Chen) | 폴리프로필렌 테레프탈레이트/폴리에틸렌 테레프탈레이트코폴리에스테르의 제조방법 |
KR20040101800A (ko) * | 2003-05-27 | 2004-12-03 | 주식회사 효성 | 테레프탈산 공법으로 제조된 염색이 용이한 코폴리에스터중합물, 그 섬유 및 이의 제조 방법 |
KR20200061948A (ko) * | 2018-11-26 | 2020-06-03 | 롯데케미칼 주식회사 | 비스-2-하이드록시 에틸 테레프탈레이트 정제 방법 및 이를 이용한 폴리에스터 제조 방법 |
KR20210037267A (ko) * | 2019-09-27 | 2021-04-06 | 에스케이케미칼 주식회사 | 폴리에스테르 수지 혼합물, 폴리에스테르 필름 및 이의 제조 방법 |
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CN112625221A (zh) * | 2020-12-26 | 2021-04-09 | 扬州普立特科技发展有限公司 | 一种回收聚酯再生为bhet生产pbt的生产设备 |
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2022
- 2022-04-05 KR KR1020220042550A patent/KR20230143522A/ko active Pending
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2023
- 2023-03-23 MX MX2024009360A patent/MX2024009360A/es unknown
- 2023-03-23 EP EP23784896.5A patent/EP4458801A1/en active Pending
- 2023-03-23 WO PCT/KR2023/003857 patent/WO2023195668A1/ko active Application Filing
- 2023-03-23 CN CN202380019981.1A patent/CN118647596A/zh active Pending
- 2023-03-23 US US18/724,617 patent/US20250066283A1/en active Pending
- 2023-03-23 JP JP2024539391A patent/JP2025510460A/ja active Pending
- 2023-03-30 TW TW112112329A patent/TW202404934A/zh unknown
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JP2000169623A (ja) * | 1998-12-10 | 2000-06-20 | Is:Kk | ポリエチレンテレフタレ―ト廃棄物のケミカルリサイクル方法 |
KR20010095884A (ko) * | 2000-04-12 | 2001-11-07 | 빌.씨. 첸(Bill. C. Chen) | 폴리프로필렌 테레프탈레이트/폴리에틸렌 테레프탈레이트코폴리에스테르의 제조방법 |
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JP2025510460A (ja) | 2025-04-15 |
EP4458801A1 (en) | 2024-11-06 |
MX2024009360A (es) | 2024-08-09 |
US20250066283A1 (en) | 2025-02-27 |
KR20230143522A (ko) | 2023-10-12 |
TW202404934A (zh) | 2024-02-01 |
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