WO2025005508A1 - 생분해성 폴리에스테르 수지 및 이의 제조 방법 - Google Patents
생분해성 폴리에스테르 수지 및 이의 제조 방법 Download PDFInfo
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- WO2025005508A1 WO2025005508A1 PCT/KR2024/007455 KR2024007455W WO2025005508A1 WO 2025005508 A1 WO2025005508 A1 WO 2025005508A1 KR 2024007455 W KR2024007455 W KR 2024007455W WO 2025005508 A1 WO2025005508 A1 WO 2025005508A1
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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
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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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
- C08G2230/00—Compositions for preparing biodegradable polymers
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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
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Definitions
- the present disclosure relates to a biodegradable polyester resin and a method for producing the same.
- a biodegradable polyester composition is manufactured using aliphatic dicarboxylic acid, aromatic dicarboxylic acid, and aliphatic diol as main raw materials, and branching agents, catalysts, and heat stabilizers as auxiliary raw materials.
- the biodegradable polyester resin is manufactured by subjecting the main raw material to an esterification reaction and a polycondensation reaction in the presence of the auxiliary raw material, and in some cases, a chain extension reaction is performed after the polycondensation reaction to enhance the mechanical properties of the biodegradable polyester resin.
- the properties of the final biodegradable polyester resin may vary depending on the characteristics of the raw material mixture during the manufacture of the biodegradable polyester.
- a biodegradable polyester resin composition having excellent processability and mechanical properties is provided.
- a method for producing a biodegradable polyester resin composition which can improve the productivity and processability of the biodegradable polyester resin composition.
- a biodegradable polyester resin composition comprises a resin comprising a residue of a dicarboxylic acid component and a residue of a diol component, and satisfies the following formula 1:
- G’ is the storage modulus in the range of temperature 190°C and frequency 10 rad/s to 100 rad/s in the dynamic viscoelasticity measurement
- G” is the loss modulus in the range of temperature 190°C and frequency 10 rad/s to 100 rad/s in the dynamic viscoelasticity measurement.
- the above dicarboxylic acid component includes an aromatic dicarboxylic acid having 6 to 12 carbon atoms and an aliphatic dicarboxylic acid having 4 to 10 carbon atoms, wherein the aromatic dicarboxylic acid having 6 to 12 carbon atoms includes terephthalic acid, isophthalic acid, furandicarboxylic acid, naphthalenedicarboxylic acid, a diester derivative thereof, an anhydride thereof, or a mixture thereof, and the aliphatic dicarboxylic acid having 4 to 10 carbon atoms may include adipic acid, succinic acid, glutaric acid, azelaic acid, sebacic acid, a cyclic fatty acid, a diester derivative thereof, an anhydride thereof, or a mixture thereof.
- the above dicarboxylic acid component may include 30 mol% to 70 mol% of an aromatic dicarboxylic acid having 6 to 12 carbon atoms and 30 mol% to 70 mol% of an aliphatic dicarboxylic acid having 4 to 10 carbon atoms, based on the total amount of the dicarboxylic acid component.
- the above diol includes an aliphatic diol having 2 to 10 carbon atoms
- the aliphatic diol having 2 to 10 carbon atoms may include 1,4-butanediol, 1,2-butanediol, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-dimethyl,1,3-propanediol, cyclic aliphatic diols, or mixtures thereof.
- the molar ratio of the above dicarboxylic acid component and the above diol component is 1.0:0.8 to 1.0:1.2.
- the change rate of complex viscosity before and after an oscillatory time sweep for 10 minutes at a temperature of 190°C and a frequency of 20 rad/s is less than 15%.
- the above biodegradable polyester resin composition has a melt flow index (MI) of 10 g/10 min or less measured at 190°C under a load of 2.16 kg according to ASTM D1238.
- a method for producing a biodegradable polyester resin composition comprises: a first step of producing a raw material mixture including an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, and an aliphatic diol; a second step of reacting the raw material mixture to produce an oligomer; a third step of polycondensing the oligomer to produce a prepolymer; and a fourth step of adding a chain extender to the prepolymer to obtain a biodegradable polyester resin composition; wherein the raw material mixture of the first step has a moisture content of 3000 ppm or less, and the biodegradable polyester resin composition produced in the fourth step satisfies the above formula 1.
- the particle size dispersion index (SPAN) of the above aromatic dicarboxylic acid is 5.0 or less.
- the reaction conversion rate of the oligomer is expressed by the following equation 2, and the reaction conversion rate is 90% to 100%:
- AV is the acid value expressed by the following equation 2-1,
- SV is the saponification value expressed by the following equation 2-2:
- A is the titer volume (ml) of 0.1 N sodium hydroxide solution
- P is the titer of 0.1 N sodium hydroxide solution
- W is the mass of the oligomer:
- B is the titrated volume (ml) of a 0.5 N hydrochloric acid solution (HCl)
- C is the titrated volume (ml) of a blank solution
- Q is the titer of a 0.5 N hydrochloric acid solution
- W’ is the mass of the oligomer.
- the above aromatic dicarboxylic acid is terephthalic acid, isophthalic acid, furandicarboxylic acid, naphthalenedicarboxylic acid, a diester derivative thereof, an anhydride thereof, or a combination thereof
- the above aliphatic dicarboxylic acid is adipic acid, succinic acid, glutaric acid, azelaic acid, sebacic acid, a cyclic fatty acid, a diester derivative thereof, an anhydride thereof, or a combination thereof.
- the aromatic dicarboxylic acid may be contained in an amount of 20 mol% to 50 mol%, and the aliphatic dicarboxylic acid may be contained in an amount of 20 mol% to 50 mol%.
- the above aliphatic diol is 1,4-butanediol, 1,2-butanediol, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-dimethyl,1,3-propanediol, cyclic aliphatic diols, or a combination thereof.
- the aliphatic diol may be included in an amount of 30 mol% to 60 mol% based on the total mole number of the raw material mixture.
- the molar ratio of the above aromatic dicarboxylic acid and aliphatic dicarboxylic acid and the above aliphatic diol is 1.0:0.8 to 1.0:1.2.
- a biodegradable polyester film can be obtained by melt-extruding the biodegradable polyester resin composition described above with a blown film extruder, and can be obtained by melt-extruding the biodegradable polyester resin composition produced by the above-described production method with a blown film extruder.
- a polyester resin composition according to one embodiment can have improved productivity and processability.
- a method for producing a polyester resin composition according to another embodiment can uniformly control the reaction speed of each process and suppress side reactions.
- a polyester film manufactured from a polyester resin composition according to one embodiment can secure excellent tensile strength, elongation, and tear strength.
- Figure 1 is a graph showing values corresponding to the area of the storage elastic modulus and the area of the loss elastic modulus measured at 10 rad/s to 100 rad/s of compositions according to examples and comparative examples.
- a biodegradable polyester resin composition comprises a resin including a residue of a dicarboxylic acid component and a residue of a diol component, and satisfies the following formula 1.
- G’ is the storage modulus in the range of temperature 190°C and frequency 10 rad/s to 100 rad/s in the dynamic viscoelasticity measurement
- G” is the loss modulus in the range of temperature 190°C and frequency 10 rad/s to 100 rad/s in the dynamic viscoelasticity measurement.
- the storage modulus (G’) and the loss modulus (G”) are measured using a rotational rheometer (TA HR-2) equipped with a 25 mm parallel plate.
- TA HR-2 rotational rheometer
- formula 1 is the integral of the storage modulus measured by performing a frequency sweep in the frequency range of 10 rad/s to 100 rad/s at a temperature of 190°C. It refers to the integral value of the loss modulus measured by performing a frequency sweep in the range of 10 rad/s to 100 rad/s at a temperature of 190°C.
- the integral of the storage modulus in the frequency range of 10 rad/s to 100 rad/s at a temperature of 190°C divided by the integral of the loss modulus under the same conditions is 0.1 to 2.0, for example, 0.1 to 1.75, for example, 0.1 to 1.50, for example, 0.15 to 1.5, for example, 0.20 to 1.5, for example, 0.25 to 1.5, for example, 0.3 to 1.5, for example, 0.4 to 1.5, for example, 0.50 to 1.5, for example, 0.50 to 1.3, for example, 0.50 to 1.0, and is not limited thereto.
- the productivity and processability of the composition can be improved, and the tensile strength, elongation, and tear strength of a biodegradable polyester film manufactured therefrom can be improved.
- the dicarboxylic acid component included in the biodegradable polyester resin composition includes an aromatic dicarboxylic acid having 6 to 12 carbon atoms and an aliphatic dicarboxylic acid having 4 to 10 carbon atoms.
- aromatic dicarboxylic acids are terephthalic acid, isophthalic acid, furandicarboxylic acid, naphthalenedicarboxylic acid, diester derivatives thereof, anhydrides thereof, or combinations thereof, for example, but not limited to, terephthalic acid, isophthalic acid, diester derivatives thereof, or combinations thereof.
- the above aliphatic dicarboxylic acids are adipic acid, succinic acid, glutaric acid, azelaic acid, sebacic acid, cyclic fatty acids, diester derivatives thereof, anhydrides thereof, or combinations thereof, for example, but not limited to, adipic acid, succinic acid, diester derivatives thereof, or combinations thereof.
- the dicarboxylic acid component may include 30 mol % to 70 mol % of the aromatic dicarboxylic acid having 6 to 12 carbon atoms and 30 mol % to 70 mol % of the aliphatic dicarboxylic acid having 4 to 10 carbon atoms, based on the total amount of the dicarboxylic acid component.
- the aliphatic diol is, but is not limited to, 1,4-butanediol, 1,2-butanediol, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-dimethyl,1,3-propanediol, a cyclic aliphatic diol, or a combination thereof.
- the molar ratio of the aromatic dicarboxylic acid and the aliphatic dicarboxylic acid and the aliphatic diol included in the biodegradable polyester resin composition is 1.0:0.8 to 1.0:1.2, for example, 1.0:0.8 to 1.0:1.15, for example, 1.0:1.1, but is not limited thereto.
- a biodegradable polyester resin composition has a complex viscosity change rate of less than 15% before and after an oscillatory time sweep for 10 minutes at a temperature of 190°C and a frequency of 20 rad/s.
- the above complex viscosity can be measured using a rotational rheometer (TA HR-2), and the complex viscosity change rate can be obtained by measuring the complex viscosity values before and after performing a vibration time sweep for 10 minutes at an angular frequency of 20 rad/s.
- the complex viscosity change rate can be obtained as [(complex viscosity value after 10 minutes - initial complex viscosity value) / initial complex viscosity value] X 100(%).
- the complex viscosity change rate is less than 15%, for example, less than 13%, for example, less than 11%, for example, less than 9%, for example, less than 6%, but is not limited thereto.
- the complex viscosity change rate is greater than or equal to 0.5%, for example, greater than or equal to 1.0%, for example, greater than or equal to 1.5%, but is not limited thereto.
- the biodegradable polyester resin composition has a complex viscosity change rate within the above range, the productivity and processability of the composition can be improved, and the tensile strength, elongation, and tear strength of a biodegradable polyester film manufactured therefrom can be improved.
- the biodegradable polyester resin composition has a melt flow index (MI) of 10 g/10 min or less as measured at 190° C. under a load of 2.16 kg according to ASTM D1238.
- the melt flow index is 10 g/10 min or less, for example, 8 g/10 min or less, for example, 6 g/10 min or less, for example, 5 g/10 min or less, but is not limited thereto.
- MI melt flow index
- the productivity and processability of the composition can be improved, and the tensile strength, elongation, and tear strength of a biodegradable polyester film manufactured therefrom can be improved.
- a method for producing a biodegradable polyester resin composition comprises: a first step of producing a raw material mixture including an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, and an aliphatic diol; a second step of reacting the raw material mixture to produce an oligomer; a third step of polycondensing the oligomer to produce a prepolymer; and a fourth step of adding a chain extender to the prepolymer to obtain a biodegradable polyester resin composition; wherein the raw material mixture of the first step has a moisture content of 3000 ppm or less, and the biodegradable polyester resin composition produced in the fourth step satisfies the above formula 1.
- the biodegradable polyester resin composition manufactured by the above manufacturing method may be the same as the above-described embodiment, and any description overlapping with the above-described content will be omitted below, and the manufacturing method of the above-described embodiment will be described step by step.
- a raw material mixture including an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, and an aliphatic diol is prepared.
- the moisture content contained in the above raw material mixture is measured using a Karl Fischer Tritrator, and specifically, the moisture content (%) is calculated using the following equation 3 by titrating with a Karl Fischer Reagent (KFR).
- T is the volume (ml) of Karl Fischer reagent consumed for sample titration
- S is the volume (ml) of Karl Fischer reagent consumed for blank titration
- R is the titer of Karl Fischer reagent (mg/ml)
- M is the mass of the sample (mg).
- the moisture content contained in the raw material mixture is 3000 ppm or less, for example, 2900 ppm or less, for example, 2800 ppm or less, for example, 2600 ppm or less, for example, 2200 ppm or less, but is not limited thereto.
- the moisture content contained in the raw material mixture is 1400 ppm or more, for example, 1500 ppm or more, but is not limited thereto.
- the biodegradable polyester resin composition can be uniform.
- the particle size dispersion index (SPAN) of the aromatic dicarboxylic acid included in the raw material mixture is 5.0 or less, for example, 4.5 or less, for example, 4.0 or less, for example, 3.5, but is not limited thereto.
- the particle size dispersion index of the aromatic dicarboxylic acid is 0.5 or more, for example, 1.0 or more, for example, 1.5 or more, but is not limited thereto.
- the particle size dispersion index (SPAN) of the above aromatic dicarboxylic acid can be measured using a particle size analyzer (Beckman Coulter, LS13320 XR, Dry powder module).
- the biodegradable polyester resin composition can be uniform.
- the aromatic dicarboxylic acid is terephthalic acid, isophthalic acid, furandicarboxylic acid, naphthalenedicarboxylic acid, a diester derivative thereof, an anhydride thereof, or a combination thereof, for example, but not limited to, terephthalic acid, isophthalic acid, a diester derivative thereof, or a combination thereof.
- the aliphatic dicarboxylic acid is adipic acid, succinic acid, glutaric acid, azelaic acid, sebacic acid, a cyclic fatty acid, a diester derivative thereof, an anhydride thereof, or a combination thereof, for example, but not limited to, adipic acid, succinic acid, a diester derivative thereof, or a combination thereof.
- the aromatic dicarboxylic acid is present in an amount of 20 mol% to 50 mol% based on the total mole number of the raw material mixture, for example, 20 mol% to 45 mol%, for example, 20 mol% to 40 mol%, for example, 20 mol% to 35 mol%, for example, 20 mol% to 30 mol%, but is not limited thereto.
- the aliphatic dicarboxylic acid is present in an amount of 20 mol % to 50 mol % based on the total mole number of the raw material mixture, for example, 20 mol % to 45 mol %, for example, 20 mol % to 40 mol %, for example, 20 mol % to 35 mol %, for example, 20 mol % to 30 mol %, but is not limited thereto.
- the aliphatic diol is, but is not limited to, 1,4-butanediol, 1,2-butanediol, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-dimethyl,1,3-propanediol, a cyclic aliphatic diol, or a combination thereof.
- the aliphatic diol is present in an amount of 30 mol % to 60 mol % based on the total moles of the raw material mixture, for example, 30 mol % to 55 mol %, for example, 35 mol % to 55 mol %, for example, 40 mol % to 60 mol %, for example, 40 mol % to 55 mol %, for example, 50 mol %, but is not limited thereto.
- the molar ratio of the aromatic dicarboxylic acid and the aliphatic dicarboxylic acid and the aliphatic diol is from 1.0:0.8 to 1.0:1.2, for example from 1.0:0.8 to 1.0:1.15, for example from 1.0:1.1, but is not limited thereto.
- the raw material mixture may additionally contain compounds to improve the properties of the biodegradable polyester resin composition, such as a branching agent and a catalyst.
- the branching agent may include a hydroxyl group (-OH), a carboxyl group (-COOH), or anhydride as a crosslinkable functional group.
- the branching agent may include glycerol, trimethylolpropane, pentaerythritol, and the like.
- the branching agent may be added not only in the first step, but also in the latter half of the second step or the latter half of the third step.
- the catalyst may be a titanium (Ti)-based catalyst
- the titanium (Ti)-based catalyst may include a titanium (Ti)-based esterification catalyst, a titanium (Ti)-based polycondensation catalyst, or a combination thereof.
- the titanium (Ti)-based esterification catalyst may include an organic acid chelate titanium compound, an inorganic titanium compound.
- the titanium (Ti)-based polycondensation catalyst may include a titanium tetraalkoxide compound, or a combination thereof.
- an oligomer having a uniform size can be manufactured, thereby preventing unreaction.
- the raw material mixture is reacted to produce an oligomer.
- the reaction In order to prevent thermal decomposition in the second step, the reaction must be carried out efficiently in a short period of time. If the temperature at which the second step is performed is too low, the residence time may be long and unreacted substances may be generated, and if the reaction temperature is too high, the diol among the reactants, particularly 1,4-butanediol, decomposes to produce THF, so 1,4-butanediol cannot sufficiently participate in the reaction, and unreacted substances may be generated.
- the second step is performed at a temperature range of 190°C to 230°C, thereby minimizing large molecules or aggregates in the final biodegradable polyester composition.
- the esterification reaction of the raw material mixture is performed by applying a low vacuum at a temperature range of 190°C to 230°C, and by-products such as water ( H2O ) and side reactants are removed to the outside of the system through a rectification column, thereby obtaining an oligomer.
- reaction conversion rate of the oligomer in the above step 2 is expressed by the following equation 2, and the reaction conversion rate is 90% to 100%.
- AV Acid Value
- SV saponification value
- A is the appropriate volume (ml) of 0.1 N sodium hydroxide solution
- P is the titer of 0.1 N sodium hydroxide solution
- W is the mass (g) of the oligomer:
- B is the titrated volume (ml) of a 0.5 N hydrochloric acid solution (HCl)
- C is the titrated volume (ml) of a blank solution
- Q is the titer of a 0.5 N hydrochloric acid solution
- W’ is the mass of the oligomer (g).
- the reaction conversion of the above oligomer is 90% to 100%, for example, 91% to 100%, for example, 93% to 100%, for example, 95% to 100%, for example, 96% to 100%, but is not limited thereto.
- the reaction conversion rate of the above oligomer satisfies the above range, the reaction speed of the above manufacturing process can be uniformly controlled, and side reactions can be suppressed, so that the biodegradable polyester resin composition can be uniform.
- the oligomer can be polycondensed to produce a prepolymer.
- the reaction can be efficiently performed in a short period of time to prevent thermal decomposition. If the temperature at which the third step is performed is too high, the thermal decomposition reaction is superior to the polycondensation reaction, which not only generates decomposition products but also increases the residence time.
- the third step is performed under a vacuum of 1 Torr or less at a temperature range of 210°C to 250°C, thereby minimizing by-products generated by thermal decomposition within the final biodegradable polyester composition.
- a prepolymer having a melt flow index (MI) of 5 g/10 min to 60 g/10 min measured at 190° C. under a load of 2.16 kg according to ASTM D1238 can be obtained.
- the third step may further include adding a heat stabilizer to cause the reaction.
- the heat stabilizer can be a phosphorus (P)-based heat stabilizer, such as trimethyl phosphonoacetate, triethyl phosphonoacetate, phosphoric acid, phosphorous acid, polyphosphric acid, trimethyl phosphate (TMP), triethyl phosphate, trimethyl phosphine, triphenyl phosphine, or a combination thereof.
- P phosphorus
- thermal decomposition can be prevented without reducing the activity of the catalyst.
- a chain extender can be added to the prepolymer to further increase the viscosity, thereby obtaining a polyester resin composition.
- the shear stress may increase and decomposition may occur, and if the reaction is performed at a high temperature, thermal decomposition may occur, rapidly increasing the molecular weight distribution of the final biodegradable polyester.
- the fourth step is performed using a static mixer or a dynamic mixer at a temperature range of 120°C to 250°C for 0 to 30 minutes.
- a biodegradable polyester film according to another embodiment can be obtained by melt-extruding the above-described biodegradable polyester resin composition with a blown film extruder, and a biodegradable polyester film according to another embodiment can be obtained by melt-extruding the biodegradable polyester resin composition manufactured by the above-described manufacturing method with a blown film extruder, and the manufacturing process of the biodegradable polyester film is not limited thereto.
- the obtained biodegradable polyester film has a thickness of 30 ⁇ m to 70 ⁇ m, for example, 30 ⁇ m to 60 ⁇ m, for example, 40 ⁇ m to 70 ⁇ m, for example, 40 ⁇ m to 60 ⁇ m, for example, 50 ⁇ m, but is not limited thereto.
- Step 1 Prepare a raw material mixture by stirring 24 mol% of terephthalic acid (TPA), 26 mol% of adipic acid (AA), and 50 mol% of 1,4-butanediol (1,4-BDO).
- TPA terephthalic acid
- AA adipic acid
- 1,4-butanediol 1,4-butanediol
- Step 2 For the raw material mixture of the above step 1, a titanium-based catalyst, tetrabutyl titanate, is added and the reaction is performed while removing the effluent generated in a low vacuum of 220°C and 650 mbar using a distillation tower to produce an oligomer.
- the reaction conversion rate of the oligomer in the second step is as shown in Table 1 below.
- Step 3 The reaction mixture obtained through the above step 2 is heated to 250°C and then condensation polymerized at 1 torr or less. When the discharge load is reached, the reaction is terminated, thereby obtaining a prepolymer having a number average molecular weight of 35,000 g/mol.
- Step 4 The obtained biodegradable polyester prepolymer is dried and then subjected to a chain extension process using a mixer to obtain a final biodegradable polyester resin composition having the properties shown in Table 2 below.
- a biodegradable polyester resin composition is manufactured by changing the properties of raw materials as shown in Table 1 below.
- a biodegradable polyester resin composition is manufactured by changing the properties of raw materials as shown in Table 1 below.
- Moisture content in the raw material mixture Using a Karl Fischer Tritrator, titrate with Karl Fischer Reagent (KFR) to calculate the moisture content (%) using the following equation 3.
- T is the volume (ml) of Karl Fischer reagent consumed for sample titration
- S is the volume (ml) of Karl Fischer reagent consumed for blank titration
- R is the titer of Karl Fischer reagent (mg/ml)
- M is the mass (mg) of the raw material mixture sample.
- Particle size dispersion index (SPAN) of aromatic dicarboxylic acid Measured using a particle size analyzer (Beckman Coulter, LS13320 XR, Dry powder module), and SPAN calculated using Equation 4 below.
- D90 refers to the particle size at which the volume accumulation corresponds to 90% from the side with a small particle size in the cumulative curve of the particle size distribution
- D10 refers to the particle size at which the volume accumulation corresponds to 10% from the side with a small particle size
- D50 refers to the particle size at which the volume accumulation corresponds to 50% from the side with a small particle size.
- A is the appropriate volume (ml) of a 0.1 N sodium hydroxide solution
- P is the titer of the 0.1 N sodium hydroxide solution
- W is the mass of the oligomer (g).
- B is the titrated volume (ml) of a 0.5 N hydrochloric acid solution (HCl)
- C is the titrated volume (ml) of a blank solution
- Q is the titer of a 0.5 N hydrochloric acid solution
- W’ is the mass of the oligomer (g).
- MI Melt Index
- PDI Molecular weight distribution
- Zero Shear Viscosity ( ⁇ 0) : This refers to the complex viscosity at each frequency of 0.1 rad/s obtained by performing a Frequency Sweep Test with 1% strain.
- Cumulative storage modulus (Cot ⁇ ) A rotational rheometer (TA HR-2) with a 25 mm parallel plate is mounted, and a frequency sweep is performed at a temperature of 190°C and a frequency of 10 to 100 rad/s to measure the storage modulus and the loss modulus.
- Fig. 1 is a graph showing the storage modulus and the loss modulus of the examples and comparative examples.
- the cumulative storage modulus is the value obtained by dividing the integral of the storage modulus in the frequency range of 10 to 100 rad/s by the integral of the loss modulus, and is as shown in Equation 1-1 below.
- Complex viscosity change rate Measured using a rotational rheometer (TA HR-2), and calculated as the viscosity change rate compared to the initial viscosity when performing a Time Sweep Test for 10 minutes at a fixed angular frequency of 20 rad/s and strain of 1%. Specifically, the complex viscosity change rate is calculated as [(complex viscosity value after 10 minutes - initial complex viscosity value) / initial complex viscosity value] X 100(%).
- biodegradable polyester resin compositions obtained in the above examples and comparative examples were melt-extruded using a blown film extruder to produce a 50 ⁇ m biodegradable polyester film, and the physical properties were evaluated by the following method, and the results are as shown in Table 2 below.
- Tensile strength This refers to the degree of resistance of the film to tearing. The tensile strength is measured using INSTRON's universal testing machine 5965 based on the ASTM D882 standard.
- Elongation is measured using INSTRON's universal testing machine 5965 based on ASTM D882 standard.
- Tear Strength The tear strength is measured using an Elmendorf tear tester from Thwing-Albert instrument company based on the ASTM D1922 standard.
- the biodegradable polyester resin composition according to the example has the characteristics of a cumulative storage coefficient of 0.1 to 1.5 and a complex viscosity change rate (%) of less than 6%. It can be confirmed that the biodegradable polyester film according to the example has better tensile strength, elongation, and tear strength than the biodegradable polyester film according to the comparative example.
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Abstract
Description
| 실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | 실시예 6 | 비교예 1 | 비교예 2 | 비교예 3 | 비교예 4 | |
| 1,4-BDO(mol%) | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| TPA(mol%) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| AA(mol%) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| TPA의 SPAN | 1.79 | 3.11 | 2.07 | 2.64 | 2.7 | 1.87 | 5.54 | 8.93 | 2.33 | 2.5 |
| 원료혼합물 내 수분함량(ppm) | 1480 | 1610 | 2850 | 1560 | 2130 | 2540 | 2080 | 1350 | 5000 | 5000 |
| 반응전환율(%) | 98.4 | 98.9 | 98.7 | 96.4 | 91.5 | 99.9 | 97.0 | 98.1 | 93.1 | 83.4 |
| 평가항목 | 실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | 실시예 6 | 비교예1 | 비교예2 | 비교예3 | 비교예4 | |
| 수지 조성물 |
MI (g/10min) |
3 | 2.7 | 3.5 | 3 | 3.3 | 3.1 | 3.4 | 2.8 | 3.1 | 3 |
| PDI | 1.89 | 2.01 | 2.2 | 2.14 | 1.98 | 2.17 | 2.56 | 3.01 | 2.61 | 2.75 | |
| 영점도 (Pa.s) |
4059 | 4425 | 3473 | 3863 | 3598 | 3696 | 3630 | 4672 | 3741 | 2990 | |
| 누적 저장 계수 | 0.783 | 0.836 | 0.798 | 0.852 | 0.988 | 0.754 | 1.680 | 2.462 | 1.742 | 0.079 | |
| 복소점도 변화율(%) | 2.4 | 3.4 | 2.1 | 3.6 | 5.6 | 1.6 | 10.5 | 18.7 | 16.0 | 20.6 | |
| 필름 | 인장강도 (kgf/㎠) |
558 | 487 | 523 | 508 | 492 | 560 | 338 | 301 | 325 | 320 |
| 신장율(%) | 470 | 463 | 460 | 455 | 456 | 468 | 435 | 428 | 431 | 438 | |
| 인열강도(g/㎛) | 3.4 | 3.1 | 3.4 | 3.1 | 2.8 | 3.5 | 2.4 | 1.1 | 1.7 | 1.3 |
Claims (17)
- 제1항에 있어서, 상기 디카르복실산 성분은 탄소수 6 내지 12의 방향족 디카르복실산 및 탄소수 4 내지 10의 지방족 디카르복실산을 포함하고,상기 탄소수 6 내지 12의 방향족 디카르복실산은 테레프탈산, 이소프탈산, 푸란디카르복실산, 나프탈렌디카르복실산, 이들의 디에스테르 유도체, 이들의 무수물, 또는 이들의 혼합물을 포함하고,상기 탄소수 4 내지 10의 지방족 디카르복실산은 아디프산, 숙신산, 글루타르산, 아젤라산, 세바스산, 고리형 지방산, 이들의 디에스테르 유도체, 이들의 무수물, 또는 이들의 혼합물을 포함하는 생분해성 폴리에스테르 수지 조성물.
- 제1항에 있어서, 상기 디카르복실산 성분은, 상기 디카르복실산 성분의 총량에 대해, 탄소수 6 내지 12의 방향족 디카르복실산 30 몰% 내지 70 몰% 및 탄소수 4 내지 10의 지방족 디카르복실산 30 몰% 내지 70 몰%을 포함하는 생분해성 폴리에스테르 수지 조성물.
- 제1항에 있어서, 상기 디올은 탄소수 2 내지 10의 지방족 디올을 포함하고,상기 탄소수 2 내지 10의 지방족 디올은 1,4-부탄디올, 1,2- 부탄디올, 에틸렌 글리콜, 1,2-프로판디올, 1,3- 프로판디올, 1,5-펜탄디올, 1,6-헥산디올, 2,2-디메틸,1,3-프로판디올, 고리형 지방족 디올류, 또는 이들의 혼합물을 포함하는 생분해성 폴리에스테르 수지 조성물.
- 제1항에 있어서, 상기 디카르복실산 성분 및 상기 디올 성분의 몰비는 1.0:0.8 내지 1.0:1.2인 생분해성 폴리에스테르 수지 조성물.
- 제1항에 있어서, 온도 190℃ 및 진동수 20rad/s에서 10분간 진동 시간 스윕(Oscillatory time sweep) 전후의 복소점도 변화율이 15% 미만인 생분해성 폴리에스테르 수지 조성물.
- 제1항에 있어서, 상기 생분해성 폴리에스테르 수지 조성물은 ASTM D1238 규격에 따라 2.16kg 하중 하에 190℃에서 측정된 용융흐름지수(MI)가 10 g/10min 이하인 생분해성 폴리에스테르 수지 조성물.
- 방향족 디카르복실산, 지방족 디카르복실산, 및 지방족 디올을 포함하는 원료 혼합물을 제조하는 제1단계;상기 원료 혼합물을 반응시켜 올리고머를 제조하는 제2단계;상기 올리고머를 중축합하여 프리폴리머를 제조하는 제3단계; 및상기 프리폴리머에 사슬연장제를 첨가하여 생분해성 폴리에스테르 수지 조성물을 얻는 제4단계;를 포함하고,상기 제1단계의 원료 혼합물이 포함하는 수분 함량은 3000ppm 이하이고,상기 제4단계에서 제조된 생분해성 폴리에스테르 수지 조성물은 하기 식 1을 만족하는 생분해성 폴리에스테르 수지 조성물의 제조방법:[식 1]상기 식 1에서,G’은 동적 점탄성 측정에서 온도 190℃ 및 진동수 10rad/s 내지 100rad/s 영역에서의 저장탄성률이고,G”은 동적 점탄성 측정에서 온도 190℃ 및 진동수 10rad/s 내지 100rad/s 영역에서의 손실탄성률이다.
- 제8항에 있어서, 상기 방향족 디카르복실산의 입자크기 분산지수(SPAN)가 5.0 이하인 생분해성 폴리에스테르 수지 조성물의 제조방법.
- 제8항에 있어서, 상기 제3단계에서 올리고머의 반응전환율은 하기 식 2로 표현되고, 상기 반응전환율이 90% 내지 100%인 생분해성 폴리에스테르 수지 조성물의 제조방법:[식 2]상기 식 2에서,AV는 하기 식 2-1로 표현되는 산가이고,SV는 하기 식 2-2로 표현되는 비누화가이다:[식 2-1]상기 식 2-1에서, A는 0.1N 수산화나트륨 용액의 적정 부피(ml)이고, P는 0.1N 수산화나트륨 용액의 역가이고, W는 올리고머의 질량이다:[식 2-2]상기 식 2-2에서, B는 0.5N 염산 용액(HCl)의 적정 부피(ml)이고, C는 바탕 용액(Blank 용액)의 적정 부피(ml)이고, Q는 0.5N 염산 용액의 역가이고, W’는 올리고머의 질량이다.
- 제8항에 있어서, 상기 방향족 디카르복실산은 테레프탈산, 이소프탈산, 푸란디카르복실산, 나프탈렌디카르복실산, 이들의 디에스테르 유도체, 이들의 무수물, 또는 이들의 조합이고, 상기 지방족 디카르복실산은 아디프산, 숙신산, 글루타르산, 아젤라산, 세바스산, 고리형 지방산, 이들의 디에스테르 유도체, 이들의 무수물, 또는 이들의 조합인 생분해성 폴리에스테르 수지 조성물의 제조방법.
- 제8항에 있어서, 상기 원료 혼합물 총 몰수를 기준으로 상기 방향족 디카르복실산은 20 몰% 내지 50 몰% 포함하고, 상기 지방족 디카르복실산은 20 몰% 내지 50 몰% 포함하는 생분해성 폴리에스테르 수지 조성물의 제조방법.
- 제8항에 있어서, 상기 지방족 디올은 1,4-부탄디올, 1,2- 부탄디올, 에틸렌 글리콜, 1,2-프로판디올, 1,3- 프로판디올, 1,5-펜탄디올, 1,6-헥산디올, 2,2-디메틸,1,3-프로판디올, 고리형 지방족 디올류, 또는 이들의 조합인 생분해성 폴리에스테르 수지 조성물의 제조방법.
- 제8항에 있어서, 상기 원료 혼합물 총 몰수를 기준으로 상기 지방족 디올은 30 몰% 내지 60 몰% 포함하는 생분해성 폴리에스테르 수지 조성물의 제조방법.
- 제8항에 있어서, 상기 방향족 디카르복실산 및 지방족 디카르복실산과 상기 지방족 디올의 몰비는 1.0:0.8 내지 1.0:1.2인 생분해성 폴리에스테르 수지 조성물의 제조방법.
- 제1항 내지 제7항 중 어느 한 항의 생분해성 폴리에스테르 수지 조성물을 블로운 필름 압출기로 용융압출하여 얻은 생분해성 폴리에스테르 필름.
- 제8항 내지 제15항 중 어느 한 항의 제조방법에 의해 제조된 생분해성 폴리에스테르 수지 조성물을 블로운 필름 압출기로 용융압출하여 얻은 생분해성 폴리에스테르 필름.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24832290.1A EP4725975A1 (en) | 2023-06-30 | 2024-05-31 | Biodegradable polyester resin and preparing method thereof |
| CN202480044091.0A CN121464167A (zh) | 2023-06-30 | 2024-05-31 | 可生物降解聚酯树脂及其制备方法 |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020230085268A KR20250003187A (ko) | 2023-06-30 | 2023-06-30 | 생분해성 폴리에스테르 수지 및 이의 제조 방법 |
| KR10-2023-0085268 | 2023-06-30 |
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| WO2025005508A1 true WO2025005508A1 (ko) | 2025-01-02 |
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| Country | Link |
|---|---|
| EP (1) | EP4725975A1 (ko) |
| KR (1) | KR20250003187A (ko) |
| CN (1) | CN121464167A (ko) |
| WO (1) | WO2025005508A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990088005A (ko) * | 1998-05-01 | 1999-12-27 | 시바타 미노루 | 열수축폴리에스테르필름 |
| KR20140076355A (ko) * | 2012-12-12 | 2014-06-20 | 삼성정밀화학 주식회사 | 생분해성 지방족/방향족 폴리에스테르 공중합체의 연속 제조방법 |
| US20160237209A1 (en) * | 2013-10-25 | 2016-08-18 | Lotte Fine Chemical Co., Ltd. | Biodegradable polyester resin compound and foamed article obtained therefrom |
| KR20220159255A (ko) * | 2021-05-25 | 2022-12-02 | 에코밴스 주식회사 | 생분해성 폴리에스테르 수지, 이의 제조 방법, 및 이를 포함하는 생분해성 폴리에스테르 필름 |
| KR20230056491A (ko) * | 2021-10-20 | 2023-04-27 | 에코밴스 주식회사 | 생분해성 폴리에스테르 수지, 및 이를 포함하는 생분해성 폴리에스테르 필름 및 적층체 |
-
2023
- 2023-06-30 KR KR1020230085268A patent/KR20250003187A/ko active Pending
-
2024
- 2024-05-31 CN CN202480044091.0A patent/CN121464167A/zh active Pending
- 2024-05-31 EP EP24832290.1A patent/EP4725975A1/en active Pending
- 2024-05-31 WO PCT/KR2024/007455 patent/WO2025005508A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990088005A (ko) * | 1998-05-01 | 1999-12-27 | 시바타 미노루 | 열수축폴리에스테르필름 |
| KR20140076355A (ko) * | 2012-12-12 | 2014-06-20 | 삼성정밀화학 주식회사 | 생분해성 지방족/방향족 폴리에스테르 공중합체의 연속 제조방법 |
| US20160237209A1 (en) * | 2013-10-25 | 2016-08-18 | Lotte Fine Chemical Co., Ltd. | Biodegradable polyester resin compound and foamed article obtained therefrom |
| KR20220159255A (ko) * | 2021-05-25 | 2022-12-02 | 에코밴스 주식회사 | 생분해성 폴리에스테르 수지, 이의 제조 방법, 및 이를 포함하는 생분해성 폴리에스테르 필름 |
| KR20230056491A (ko) * | 2021-10-20 | 2023-04-27 | 에코밴스 주식회사 | 생분해성 폴리에스테르 수지, 및 이를 포함하는 생분해성 폴리에스테르 필름 및 적층체 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250003187A (ko) | 2025-01-07 |
| EP4725975A1 (en) | 2026-04-15 |
| CN121464167A (zh) | 2026-02-03 |
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