WO2019066292A1 - Highly heat-resistant polycarbonate ester and preparation method therefor - Google Patents

Abstract

The present invention relates to a highly heat-resistant organism-based polycarbonate ester and a preparation method therefor and, more specifically, the highly heat-resistant organism-based polycarbonate ester has excellent heat resistance, transparency, and processability.

Description

High heat resistant polycarbonate esters and process for their preparation

More particularly, the polycarbonate ester is excellent in heat resistance, transparency and processability.

Bio-based polycarbonate esters prepared by melt polycondensation of 1,4: 3,6-dianhydrohexitol with carbonates or 1,4-cyclohexanedicarboxylate are useful as biocide- Bioplastic containing bio-based monomers derived from the sources, namely 1,4: 3,6-dianhydrohexitol. The bio-based polycarbonate ester has a high transparency of PMMA (poly (methyl methacrylate)) and a high heat resistance of bisphenol A (BPA) polycarbonate, which are typical transparent resins.

The structural characteristics of such a bio-based polycarbonate ester do not include BPA that induces environmental hormones, and by copolymerizing a 1,4-cyclohexanedicarboxylate monomer having an aliphatic cyclic molecular structure, 1,4: 3,6- Dianhydrohexitol can improve the poor ductility of the molecular structure. Further, the disadvantage of the carbonate bond can be compensated by replacing a part of the carbonate bond with an ester bond.

The 1,4: 3,6-dianhydrohexitol exists in three isomers and is isomerized with isomannide (melting point: 81-85 DEG C) represented by the following formula (a) (Melting point: 61-62 DEG C), and isoidide (melting point: 64 DEG C) represented by the following formula (c), and the endo and exo of two hydroxyl groups in the molecule (exo) There are differences in chemical properties due to positional differences.

(A)

[Formula b]

(C)

Particularly, when 1,4: 3,6-dianhydrohexitol is used as a monomeric material of a polycarbonate, which is one of typical transparent engineering plastics, the polycarbonate produced has advantages of bioplastics and 1,4: 3 , 6-dianhydrohexitol has a small volume but a rigid condensed fused heterocycle structure, which has a high molecular weight, a high thermal resistance and transparency, and excellent surface hardness, UV stability, flame retardancy, It has chemical characteristics. Due to such advantages, the 1,4-3,6-dianhydrohexitol is widely used as a typical constituent ingredient in the development of bioplastics.

On the other hand, 1,4-cyclohexanedicarboxylic acid (1,4-dimethyl-cyclohexanedicarboxylate, DMCD) or 1,4-cyclohexanedicarboxylic acid (CHDA ) Has an aliphatic cyclic structure at the center of the molecule. Therefore, when introduced into a polymer chain, it can improve the UV stability and weatherability of the polymer. Due to the unique combination of flexibility and hardness in the molecular structure, Yellowing resistance, hydrolytic stability, corrosion resistance and chemical resistance. Also, DMCD or CHDA consists of an isomer mixture of cis and trans represented by the following formula (d), and the cis / trans ratio of commercially produced DMCD is about 80/20%. When such an aliphatic ring structure such as DMCD or CHDA is present in the polymer chain, secondary mechanical relaxation of the polymer due to the molecular flip motion of the aliphatic ring is caused to improve the mechanical properties of the polymer. It has the advantage of increasing the impact strength.

[Chemical formula d]

On the other hand, the development of high heat-resistant materials that can be applied to various fields such as automobile, electronic equipment, industrial lighting, and medical treatment has been progressed with a recent glass transition temperature (Tg) of 170 ° C or higher. However, the bio-based polycarbonate esters prepared by the melt polycondensation of 1,4: 3,6-dianhydrohexitol and the carbonate or 1,4-cyclohexanedicarboxylate have a Tg of 170 DEG C or lower, It is necessary to improve the heat resistance.

As a method for increasing the heat resistance of BPA polycarbonate, copolymerized polycarbonates have been developed using various monomers having a bulky and rigid structure. However, since monomers having a bulky and hard structure are expensive and complicated to synthesize, they are expensive and have to be replaced with a large amount of BPA in order to improve sufficient heat resistance. Therefore, the transparency and fluidity of the BPA polycarbonate are reduced, There is a problem accompanying it.

Accordingly, an object of the present invention is to provide a high-temperature-resistant bio-based polycarbonate ester and a method for producing the same, which can realize high fluidity while maintaining a high transparency of a bio-based polycarbonate ester using a low- Method.

In order to achieve the above object,

A repeating unit 1 represented by the following formula (1);

A repeating unit 2 represented by the following formula (2); And

And a repeating unit (3) represented by the following formula (3): < EMI ID =

[Chemical Formula 1]

(2)

(3)

In addition,

(1) a compound represented by the following formula (4) is converted into an intermediate reactant having a halogen functional group at the terminal thereof, followed by nucleophilic reaction with a phenol or a phenol substituent, or a phenol or phenol substituent is transesterified or Esterification to prepare a compound represented by the following formula (5); And

(2) a compound represented by the following general formulas (5) to (7) and 1,4: 3,6-dianhydrohexitol under the melt polycondensation reaction to obtain a compound containing the repeating units 1 to 3 represented by the following general formulas A process for producing a high-temperature bio-based polycarbonate ester, comprising:

[Chemical Formula 1]

(2)

(3)

[Chemical Formula 4]

[Chemical Formula 5]

[Chemical Formula 6]

(7)

In the above formulas,

R < ¹ > are each independently methyl or hydrogen,

R ² and R ³ are each independently an alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms, and the aryl group is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 4 to 20 carbon atoms, an aryl group having 6 to 18 carbon atoms , An alkoxy group having 1 to 18 carbon atoms, a cycloalkoxy group having 4 to 20 carbon atoms, an aryloxy group having 6 to 18 carbon atoms, an alkylsulfonyl group having 1 to 18 carbon atoms, a cycloalkylsulfonyl group having 4 to 20 carbon atoms, An arylsulfonyl group, and an ester substituent.

The high heat-resistant bio-based polycarbonate ester of the present invention has an excellent heat resistance of 160 DEG C or higher at a glass transition temperature, is excellent in transparency and processability, and is environment-friendly because it does not contain bisphenols.

Hereinafter, the present invention will be described in detail.

High temperature biobased polycarbonate esters

The present invention relates to a resin composition comprising a repeating unit 1 represented by the following general formula (1); A repeating unit 2 represented by the following formula (2); And a repeating unit (3) represented by the following general formula (3): < EMI ID = 1.0 >

[Chemical Formula 1]

(2)

(3)

The recurring unit 1 is obtained from the reaction of 1,4: 3,6-dianhydrohexitol and carbonate, and the recurring unit 2 is 1,4: 3,6-dianhydrohexitol and 1,4-cyclo Hexanedicarboxylate, and the repeating unit 3 can be obtained from the reaction of 1,4: 3,6-dianhydrohexitol and terephthalate.

The cis / trans ratio of 1,4-cyclohexanedicarboxylate in the repeating unit 2 may be 1/99 to 99/1%, 20/80 to 80/20%, or 30/70 to 70/30% .

The 1,4: 3,6-dianhydrohexitol may be isomanide, isosorbide and isoidide, and may be specifically isosorbide.

More specifically, when the molar fractions of the repeating units 1 to 3 are represented by x, y, and z, respectively, x is a real number of more than 0 and less than 1 Y is a real number greater than 0 and less than or equal to 0.7, z is a real number greater than 0 and less than or equal to 0.6, and x + y + z can be 1. More specifically, x is a real number of more than 0 and not more than 0.9, or not more than 0 and not more than 0.8, y is a real number of not less than 0 and not more than 0.6, or not less than 0 and not more than 0.5, z is more than 0 and not more than 0.5, X + y + z may be a real number.

The high temperature resistant biobased polycarbonate ester may have a glass transition temperature (Tg) of 160 to 240 ° C and a melt flow index (MFI) at 260 ° C and a load of 2.16 kg of 5 to 150 g / 10 min. Specifically, the polycarbonate ester may have a Tg of 170 to 220 캜, or 180 to 200 캜, an MFI of 10 to 100 g / 10 min, or 15 to 50 g / 10 min at 260 캜 and a load of 2.16 kg.

The high-temperature bio-based polycarbonate ester may have an intrinsic viscosity (IV) of 0.3 to 2.3 dL / g.

METHOD FOR PREPARING POLYBONATE ESTER BASED ON HIGH STORAGE BIOLOGICAL

In addition,

(1) a compound represented by the following formula (4) is converted into an intermediate reactant having a halogen functional group at the terminal thereof, followed by nucleophilic reaction with a phenol or a phenol substituent, or a phenol or phenol substituent is transesterified or Esterification to prepare a compound represented by the following formula (5); And

(2) a compound represented by the following general formulas (5) to (7) and 1,4: 3,6-dianhydrohexitol under the melt polycondensation reaction to obtain a compound containing the repeating units 1 to 3 represented by the following general formulas The method comprising the steps of: preparing a high temperature bio-based polycarbonate ester.

[Chemical Formula 1]

(2)

(3)

[Chemical Formula 4]

[Chemical Formula 5]

[Chemical Formula 6]

(7)

In the above formulas,

R < ¹ > are each independently methyl or hydrogen,

R ² and R ³ are each independently an alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms, and the aryl group is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 4 to 20 carbon atoms, an aryl group having 6 to 18 carbon atoms , An alkoxy group having 1 to 18 carbon atoms, a cycloalkoxy group having 4 to 20 carbon atoms, an aryloxy group having 6 to 18 carbon atoms, an alkylsulfonyl group having 1 to 18 carbon atoms, a cycloalkylsulfonyl group having 4 to 20 carbon atoms, An arylsulfonyl group, and an ester substituent. The ester substituent may be an alkyl ester having 1 to 18 carbon atoms, a cycloalkyl ester having 4 to 20 carbon atoms, or an aryl ester having 6 to 18 carbon atoms.

Step (1)

In this step, the compound represented by the formula (4) is converted into an intermediate reactant having a halogen functional group at the terminal thereof, followed by a nucleophilic reaction with a phenol or phenol substituent, or a phenol or phenol substituent is transesterified Esterification reaction is carried out to prepare a compound represented by the above formula (5).

The phenol substituent may be a compound represented by the following general formula (9).

[Chemical Formula 9]

In the above formula (9)

Wherein R ⁵ is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 4 to 20 carbon atoms, an aryl group having 6 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, a cycloalkoxy group having 4 to 20 carbon atoms, An alkylsulfonyl group having 1 to 18 carbon atoms, a cycloalkylsulfonyl group having 4 to 20 carbon atoms, an arylsulfonyl group having 6 to 18 carbon atoms, or an ester substituent. The ester substituent may be an alkyl ester having 1 to 18 carbon atoms, a cycloalkyl ester having 4 to 20 carbon atoms, or an aryl ester having 6 to 18 carbon atoms.

Intermediate reactant

The intermediate reactant having a halogen functional group at the terminal thereof may be a compound represented by the following formula (8).

[Chemical Formula 8]

In Formula 8,

R < ⁴ > are each independently F, Cl or Br.

Specifically, the intermediate reactant containing a halogen functional group at the terminal may be terephthaloyl chloride (TPC) in which R ⁴ is Cl.

The intermediate reactant having a halogen functional group at the terminal may be prepared by reacting the compound of formula (4) (dicarboxylate or dicarboxylic acid) with a halogenated compound.

The halogenated compound may be selected from the group consisting of phosgene, triphosgene, thionyl chloride, oxalyl chloride, phosphorus trichloride, phosphorus pentachloride, At least one selected from the group consisting of phosphorus pentabromide and cyanuric fluoride. Specifically, the halogenated compound may be at least one chlorinating agent selected from the group consisting of phosgene, thionyl chloride, and oxalyl chloride, which facilitates removal of reaction by-products. Further, preferably, in a commercial aspect, the halogenated compound may be phosgene.

The addition amount of the halogenated compound may be 1 to 10 times, 1.5 to 7.5 times, or 2 to 5 times the number of mols of the total molar amount of the compound of Formula 4 initially introduced.

The reaction conditions and time may vary depending on the type of the compound of formula (IV) and the halogenated compound. Specifically, the conversion to the intermediate reactant can be carried out at atmospheric pressure and a temperature of -30 to 150 캜 for 5 minutes to 48 hours. More specifically, the conversion to the intermediate reactant can be carried out at normal pressure and at a temperature of from 20 to 100 DEG C, or from 40 to 80 DEG C for from 10 minutes to 24 hours.

In the conversion to the intermediate reactant, an organic solvent may be used to dissolve or disperse the compound of the formula (4). The organic solvent that may be used herein may be, for example, benzene, toluene, xylene, mesitylene, methylene chloride, dichloroethane, chloroform, carbon tetrachloride, monochlorobenzene, o- Dioxane and acetonitrile.

In order to increase the conversion rate and the reaction yield of the intermediate reactant, a catalyst may be used depending on the kind of the compound of the formula (4) and the halogenated compound used in the conversion to the intermediate reactant. The type of the catalyst is not particularly limited so long as it is in conformity with this object. Examples of the organic catalyst which can be used herein include dimethylformamide, dimethylacetamide, methylpyrrolidone, dimethyl imidazolidinone, tetramethylurea, tetraethylurea and tetrabutylurea. As the inorganic catalyst, (AlCl ₃ ), iron chloride (FeCl ₃ ), bismuth chloride (BiCl ₃ ), gallium chloride (GaCl ₃ ), antimony pentachloride (SbCl ₅ ), boron trifluoride (BF ₃ ), bismuth trifluoro (Bi (OTf) ₃ ), titanium tetrachloride (TiCl ₄ ), zirconium tetrachloride (ZrCl ₄ ), titanium tetrabromide (TiBr ₄ ) and zirconium tetrabromide (ZrBr ₄ ). Among them, dimethylformamide, tetramethylurea or dimethylimidazolidinone can be used as an organic catalyst, and aluminum chloride or titanium tetrachloride can be used as an inorganic catalyst. In addition, dimethyl formamide may be used as a commercially preferable organic catalyst, and aluminum chloride may be used as an inorganic catalyst.

The amount of the catalyst to be used in the conversion to the intermediate reactant is not particularly limited, but depends on the type of the compound of formula (IV) and the halogenated compound. Specifically, the amount of the catalyst used in the conversion to the intermediate reactant may be in the range of more than 0 to 10 mol%, more than 0 and 5 mol%, or more than 0 and 3 mol% or less based on the total molar amount of the compound of Formula 4 initially introduced have. When the amount of the catalyst used is less than the above range in the conversion to the intermediate reactant, the problem of lowering the reaction rate and causing the runaway reaction and the exothermic reaction can be prevented.

In step (1), terephthalic acid (TPA), wherein R ¹ is hydrogen, or dimethyl terephthalate (DMT), wherein R ¹ is methyl, is reacted with an intermediate reaction product TPC Diphenyl terephthalate (DPT) represented by the general formula (5) can be prepared by reacting with a phenol or a phenol substituent (see Scheme 1 below). In the scheme 1, Me is methyl and Ph is phenyl to be).

[Reaction Scheme 1]

In the nucleophilic reaction, the molar ratio of the compound represented by Formula 8 to the phenol or phenol substituent may be 1: 1 to 5. Specifically, in the nucleophilic reaction, the molar ratio of the compound represented by Formula 8 to the phenol or phenol substituent may be 1: 2 to 3. When the molar ratio of the compound represented by the formula (8) and the phenol or phenol substituent in the nucleophilic reaction is within the above range, the final yield of the compound (DPT) represented by the formula (5), which is a problem that may occur due to the use of an excessive phenol or phenol substituent Can be prevented.

Ester exchange or esterification reaction

In the above step (1), the compound represented by Chemical Formula 5 may be prepared by transesterifying or esterifying DMT in which R ¹ is hydrogen or R ^{1 in} which R ¹ is methyl, and phenol or phenol substituent (See Scheme 1 above).

The transesterification or esterification reaction may be carried out at 20 to 300 < 0 > C. Specifically, the transesterification or esterification reaction is carried out at 50 to 250 ° C or 100 to 200 ° C at normal pressure, or at 50 to 300 ° C under a pressure of 0.1 to 10 kgf / cm 2 or 1 to 5 kgf / cm 2 .

The transesterification or esterification reaction may be carried out for 5 minutes to 48 hours, or 10 minutes to 24 hours.

In the ester exchange or esterification reaction, the molar ratio of the compound represented by Formula 4 to the phenol or phenol substituent may be 1: 2 to 40. Specifically, in the ester exchange or esterification reaction, the molar ratio of the compound represented by Formula 4 to the phenol or phenol substituent may be 1: 3 to 30, or 1: 4 to 20. When the molar ratio of the compound represented by the general formula (4) and the phenol or phenol substituent is within the above range, the final yield of the compound of the general formula (5), which may be caused by a small amount of phenol or phenol substituent, can be prevented from lowering.

Step (2)

In this step, a compound represented by the following formulas (5) to (7) and 1,4: 3,6-dianhydrohexitol are subjected to a melt polycondensation reaction to obtain a compound containing the repeating units 1 to 3 represented by the following formulas .

[Chemical Formula 1]

(2)

(3)

[Chemical Formula 4]

[Chemical Formula 5]

[Chemical Formula 6]

(7)

In the above formulas,

R ² and R ³ are each independently an alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms, and the aryl group is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 4 to 20 carbon atoms, an aryl group having 6 to 18 carbon atoms , An alkoxy group having 1 to 18 carbon atoms, a cycloalkoxy group having 4 to 20 carbon atoms, an aryloxy group having 6 to 18 carbon atoms, an alkylsulfonyl group having 1 to 18 carbon atoms, a cycloalkylsulfonyl group having 4 to 20 carbon atoms, An arylsulfonyl group, and an ester substituent. The ester substituent may be an alkyl ester having 1 to 18 carbon atoms, a cycloalkyl ester having 4 to 20 carbon atoms, or an aryl ester having 6 to 18 carbon atoms.

The cis / trans ratio of the compound represented by Formula 6 may be 1/99 to 99/1%, 10/90 to 90/10%, or 20/80 to 80/20%. Further, the cis / trans ratio of 1,4-cyclohexanedicarboxylate in the repeating unit 2 represented by the general formula (2) is 1/99 to 99/1%, 20/80 to 80/20%, or 30/70 to 70 / 30%.

The compound represented by the formula (7) may be prepared by reacting a compound represented by the formula (7) with a compound selected from the group consisting of dimethyl carbonate, diethyl carbonate, di-t-butyl carbonate, diphenyl carbonate, ditolyl carbonate ditolyl carbonate or bis (methyl salicyl) carbonate.

Specifically, since the above-mentioned melt polycondensation reaction proceeds under reduced pressure, diphenyl carbonate or substituted diphenyl carbonate may be used as the compound represented by the general formula (7). The substituted diphenyl carbonate may be ditolyl carbonate or bis (methyl salicyl) carbonate.

1,4: 3,6-dianhydrohexitol

The 1,4: 3,6-dianhydrohexitol may be isomanide, isosorbide and isoidide, and may be specifically isosorbide.

On the other hand, the heat resistance, transparency and transparency of the prepared high-temperature biobased polycarbonate ester In order to improve the mechanical properties, it is very important to control the purity of 1,4: 3,6-dianhydrohexitol used in the melt polycondensation reaction. The 1,4: 3,6-dianhydrohexitol can be used in the form of a powder, a flake, or an aqueous solution. However, the above 1,4: 3,6-dianhydrohexitol is easily oxidized and discolored when exposed to air for a long time, so that the color and molecular weight of the final polymer can not reach the target level Occurs. Therefore, it is preferable that the 1,4: 3,6-dianhydrohexitol should be exposed to the air in a minimum time, and it is preferably stored together with an oxygen scavenger such as an oxygen absorbent when stored after exposure. Also, for purity control, it is very important to purify by removing the impurity contained in the multistage production process of 1,4: 3,6-dianhydrohexitol. Concretely, it is important to remove alkali metal component impurities which can be removed by distillation purification of 1,4: 3,6-dianhydrohexitol in a trace amount of an acidic liquid component which can be removed by a conventional separation and a residual amount separation . The impurities of the acid liquid component and the metal component may be controlled to 10 ppm or less, 5 ppm or less, or 3 ppm or less, respectively.

High temperature biobased polycarbonate esters

The high-temperature-resistant bio-based polycarbonate ester may be composed of the repeating units 1 to 3. Specifically, the 1,4: 3,6-dianhydrohexitol and the compound represented by the formula (7) react to form a carbonate bond (repeating unit 1, formula 1), and the 1,4: 3,6 Dianhydrohexitol and the compound represented by Formula 6 react to form an ester bond (Repeating Unit 2, Formula 2), and the 1,4: 3,6-dianhydrohexitol and the compound represented by Formula 5 The displayed compound may react to form an ester bond (repeating unit 3, formula 3).

When the molar fraction of the 1,4: 3,6-dianhydrohexitol is 1, the molar fraction of the compound represented by the formula (7) is x, and the compound represented by the formula 6 (1,4-diphenyl-cyclohexane Y + z = 1, where y is the molar fraction of dicarboxylate (1,4-diphenyl-cyclohexanedicarboxylate, DPCD) and z is the mole fraction of the compound (DPT) Ph in Scheme 2 is a phenyl group).

[Reaction Scheme 2]

Specifically, a polycarbonate prepared by melt polycondensation of 1,4: 3,6-dianhydrohexitol and diphenyl carbonate (Formula 7) in which the amount of the compound represented by Formula 5 and Formula 6 is 0, Has a Tg of 163 占 폚. At this time, increasing the amount of the compound represented by Chemical Formula 5 and Chemical Formula 6 increases the ester bond in the polymer chain. When the amount of the compound represented by Formula 5 is 1, polyester having a Tg of 215 ° C is produced. When the amount of the compound represented by Formula 6 is 1, polyester having a Tg of 132 ° C is produced.

Accordingly, the content of the repeating units 2 and 3 represented by the above formulas (2) and (3) and the number of carbonate and ester bonds existing in the polymer chain depend on the amount of the compound represented by the above formulas (5) and (6). In the case where the polymer chain includes a carbonate and an ester bond together (including the above recurring units 1 to 3), it is possible to realize properties suitable for various purposes. In particular, polymers having excellent heat resistance, transparency and processability Can be provided.

Based on 1 mol% of 1,4: 3,6-dianhydrohexitol, the total amount of the compound represented by the formula (5) Mol%, 0.9 to 1.1 mol%, or 0.95 to 1.05 mol%.

Generally, in the case of polycarbonate, heat resistance and mechanical properties are superior to those of polyester but are relatively inadequate in respect of chemical resistance, residual stress and molding cycle time. However, as described above, polycarbonate esters containing both a carbonate and an ester bond in a single chain have both disadvantages and advantages of each single bond polymer.

Melt polycondensation reaction

The above-mentioned melt polycondensation reaction can induce rapid removal of by-products from the molten reactant having a high viscosity, and the temperature increase and the decompression can be applied stepwise to promote the polymerization reaction rate.

Specifically, the melt polycondensation reaction of step (2)

(2-1) a step of subjecting to a primary reaction at a reduced pressure of 50 to 700 torr and at 130 to 250 ° C, 140 to 240 ° C, or 150 to 230 ° C for 0.1 to 10 hours, or 0.5 to 5 hours; And

(2-2) a second reaction at a reduced pressure of 0.1 to 20 torr and a second reaction at 200 to 350 DEG C, 220 to 280 DEG C, or 230 to 270 DEG C for 0.1 to 10 hours, or 0.5 to 5 hours .

Specifically, the melt polycondensation reaction

(2-1) raising the temperature to 130 to 200 ° C, reducing the pressure to 200 to 700 torr, raising the temperature to 200 to 250 ° C at a rate of 0.1 to 10 ° C / minute, and then reducing the pressure to 50 to 180 torr ; And

(2-2) reducing the pressure to 1 to 20 torr, raising the temperature to 200 to 350 DEG C at a rate of 0.1 to 5 DEG C / minute, and then performing a second reaction at a reduced pressure of 0.1 to 1 torr.

Meanwhile, phenol may be generated as a reaction by-product during the melt polycondensation reaction. In order to move the reaction equilibrium in the polycarbonate ester producing direction, the phenol as the reaction by-product is preferably discharged out of the reaction system. When the rate of temperature increase during the melt polycondensation reaction is within the above range, it is possible to prevent the reaction starting material from being vaporized or sublimated together with phenol as a reaction by-product. Specifically, the polycarbonate ester can be prepared by a batch process or a continuous process.

Particularly, in the melt polycondensation reaction using 1,4: 3,6-dianhydrohexitol in order to produce a polymer having a high transparency, a relatively low reaction temperature is suitable. Further, in order to ensure the mechanical properties of the produced polymer, it is preferable that the above-mentioned melt polycondensation reaction proceeds to a high polymerization degree. For this purpose, it is effective to use a high viscosity polymerization reactor for the melt polycondensation reaction. The target viscosity of the melt polycondensation reaction may be 10,000 to 1,000,000 poise, 20,000 to 500,000 poise, or 50,000 to 200,000 poise.

Additional diol compounds

The reactants of the above step (2) (the compounds represented by the above Chemical Formulas 5 to 7 and 1,4: 3,6-dianhydrohexitol) are reacted with an additional diol Compound, and the kind thereof is not limited. The additional diol compound may be a primary, secondary, or tertiary diol compound, depending on the target properties.

When the input molar ratio of the additional diol compound is q, the input molar ratio of 1,4: 3,6-dianhydrohexitol is 1-q. Particularly, when the petroleum-based diol compound is used as the additional diol compound, the bio-based carbon content (ASTM-D6866) derived from 1,4: 3,6-dianhydrohexitol 1% or more, where q may be 0 < q &lt; 0.99. That is, the additional diol compound may be contained in an amount of less than 99 mol% based on 100 mol% of 1,4: 3,6-dianhydrohexitol.

At this time, in order to improve heat resistance, transparency, UV stability and weatherability of the produced high heat-resistant bio-based polycarbonate ester, the additional diol compound may be a diol compound having a single aliphatic ring or condensed heterogeneous ring at the center of the molecule. On the other hand, in general, when the hydroxyl group is symmetrical, the ring size and the heat resistance increase proportionally, but the optical properties do not depend on the ring size and the hydroxyl group position but depend on the characteristics of each raw material. Commercial manufacture and use become difficult. Specifically, the additional diol compound is selected from the group consisting of 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol (1 4-cyclohexanedimethanol, tricyclodecanedimethanol, pentacyclopentadecanedimethanol, decalindimethanol, tricyclotetradecanedimethanol, norbornanedimethanol, tricyclodecanedimethanol, tricyclodecanedimethanol, Adamantanedimethanol, 3,9-bis (1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane (1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane, bicyclo [2.2.2] bicyclo [2.2.2 octane-2,3-dimethanol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, 4-cyclohexane anediol, 2-methyl-1, 4-cyclohexanediol, tricyclodecanediol, pentacyclopentadecanediol, decalindiol, Tricyclotetradecanediol, norbornanediol, adamantanediol, 2,2-bis (4-hydroxycyclohexyl) propane, 2,2-bis (4-hydroxycyclohexyl) ), 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 5,5 '- (1 Methylethylidene bis (2-furanmethanol), tetrahydrofuran-2,5-dimethanol (tetrahydrofuran-2,5-dimethanol) , 2,4: 3,5-di-o-methylene-D-mannitol, and 2,4: 3,5-di-o-methylene-D-mannitol. Specifically, the additional diol compound is selected from the group consisting of 1,4-cyclohexanedimethanol, 2,2-bis (4-hydroxycyclohexyl) propane, 2,2,4,4-tetramethyl- Or tetrahydrofuran-2,5-dimethanol.

Additional diphenyl ester compounds

On the other hand, depending on the target properties, the reactants of the step (2) (the compounds represented by the above formulas 5 to 7 and 1,4: 3,6-dianhydrohexitol) are the ester- In addition to the compound represented by the general formula (6), an additional diphenyl ester compound. When the input molar ratio of the additional diphenyl ester compound is p, the input molar ratio of the compounds represented by the general formulas (5) to (7) is 1-p. At this time, p satisfies 0? P <1.

The additional diphenyl ester compound may be one kind or a mixture of two or more kinds.

The additional diphenyl ester can be prepared by reacting a primary, secondary or tertiary dicarboxylate or dicarboxylic acid (hereinafter additional dicarboxylate or dicarboxylic acid) with a phenol or phenol substituent. In order to further improve the heat resistance, transparency, UV stability and weatherability of the high heat-resistant bio-based polycarbonate esters of the present invention, the additional diphenyl esters may be further dicarboxylates or dicarboxylic acids having a single aliphatic ring or condensed hetero- Can be prepared by reacting a carboxylic acid with a phenol or phenol substituent.

The additional dicarboxylate compound may be selected from the group consisting of 1,2-dimethyl-cyclohexanedicarboxylate, 1,3-dimethyl-cyclohexanedicarboxylate, dimethyl Dimethyl decahydro-2,5-naphthalenedicarboxylate, dimethyl decahydro-2,5-naphthalenedicarboxylate, dimethyldecahydro-2 (2-naphthalenedicarboxylate) Dimethyl decahydro-2,6-naphthalenedicarboxylate, dimethyl decahydro-2,7-naphthalenedicarboxylate, dimethyl tetrahydrofuran-2,5-dicarboxylic acid, Dimethyl tetrahydrofuran-2,5-dicarboxylate, and the like.

The additional dicarboxylic acid compound may be selected from the group consisting of 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, decahydro- Decahydro-2,4-naphthalenedicarboxylic acid, decahydro-2,5-naphthalenedicarboxylic acid, decahydro-2,6-naphthalene Decahydro-2,7-naphthalenedicarboxylic acid, decahydro-2,7-naphthalenedicarboxylic acid, Tetrahydrofuran-2, 5-dicarboxylic acid, and the like.

Specifically, the additional diphenyl esters may be selected from the group consisting of dimethyltetrahydrofuran-2,5-dicarboxylate, tetrahydrofuran-2,5-dicarboxylic acid, dimethyldecahydro-2,6-naphthalene Dicarboxylate or decahydro-2,6-naphthalene dicarboxylic acid.

A catalyst for melt polycondensation reaction

In the melt polycondensation reaction, a catalyst may be used for improving the reactivity. The catalyst may be added to the reaction step at any time, but it is preferably added before the initiation of the reaction.

The catalyst is not particularly limited as long as it is an alkali metal and / or an alkaline earth metal catalyst commonly used in polycondensation polycondensation reaction. The catalyst may be used in combination with a basic ammonium or amine, a basic phosphorus, or a basic boron compound, or may be used alone. The alkali metal catalyst is lithium hydroxide (LiOH), sodium hydroxide (NaOH), potassium hydroxide (KOH), cesium hydroxide (CsOH), lithium carbonate (Li ₂ CO _3), sodium carbonate ( Na ₂ CO ₃ ), potassium carbonate (K ₂ CO ₃ ), cesium carbonate (Cs ₂ CO ₃ ), lithium acetate (LiOAc), sodium acetate (NaOAc), potassium acetate (KOAc) or cesium acetate . The alkaline earth metal catalyst may be at least one selected from the group consisting of calcium hydroxide (Ca (OH) ₂ ), barium hydroxide (Ba (OH) ₂ ), magnesium hydroxide (Mg (OH) ₂ ), strontium hydroxide (OH) ₂ ), calcium carbonate (CaCO ₃ ), barium carbonate (BaCO ₃ ), magnesium carbonate (MgCO ₃ ), strontium carbonate (SrCO ₃ ), calcium acetate (Ca (OAc) ₂ ), barium acetate ) ₂ ), magnesium acetate (Mg (OAc) ₂ ), or strontium acetate (Sr (OAc) ₂ ). Further, the catalyst may be an oxide, hydride, amide, or phenolate of an alkali metal and / or an alkaline earth metal, for example, magnesium oxide (MgO) Barium oxide (BaO), sodium aluminate (NaAlO ₂ ), and the like. The catalyst may also be a catalyst such as zinc oxide (ZnO), red oxide (PbO), dibutyltin oxide ((C ₄ H ₉ ) ₂ SnO), antimony trioxide (Sb ₂ O ₃ ) and the like.

The amount of catalyst used in the melt polycondensation reaction may be from 0 to 5 mmol, from 0 to 3 mmol, or from 0 to 1 mmol, per mol of the total diol compound. When the amount of the catalyst used is within the above range, it is possible to prevent a problem that the degree of polymerization falls below the target degree of polymerization, and a problem that a side reaction or the like occurs and the target physical property such as transparency is lowered.

Further, in the method for producing a high-temperature-resistant bio-based polycarbonate ester of the present invention, various additives may be further added to the reactant, if necessary. Such additives include, for example, antioxidants and heat stabilizers such as hindered phenols, hydroquinone, phosphites, and substituted compounds thereof; UV absorbers such as resorcinol and salicylate; Color protectants such as phosphites and hydro phosphites; Lubricants such as montanic acid and stearyl alcohol; And the like. In addition, dyes and pigments can be used as colorants, carbon black can be used as a conductive agent, a coloring agent, or a nucleation agent. In addition, a flame retardant, a plasticizer, an antistatic agent, Can be used. At this time, all of the above-mentioned additives can be used within the range of properties of the final polymer, in particular, the transparency is not impaired.

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. The following examples illustrate the present invention, and the scope of the present invention is not limited by the following examples.

[Example]

Production Example 1. Synthesis of DPT using TPA

100 g (0.60 mol) of TPA (manufactured by SK Chemical) and 200 g of toluene were fed into a 1 L round bottom flask equipped with a four-bladed agitator, a phosgene and nitrogen gas inlet, a discharge gas outlet and a thermometer, Lt; / RTI &gt; 1.28 mol of phosgene gas was injected into the flask at normal pressure for 10 hours and reacted. Thereafter, nitrogen was injected for 2 hours to remove the residual phosgene and the hydrochloric acid gas as a by-product to obtain a transparent and homogeneous reaction solution. As a result of GC analysis of the reaction solution, the ratio of TPC was 49% by weight and the reaction yield was 87%.

Then, 50% by weight of the total amount of toluene was removed from the reaction solution by distillation under reduced pressure. Then, a phenol solution in which 121 g (1.28 mol) of phenol was dissolved in 121 g of toluene was added to the reaction solution through a dropping funnel for 2 hours, and the mixture was stirred for 1 hour. After completion of the reaction, toluene was removed from the reaction solution by distillation under reduced pressure, and the obtained crude DPT was recrystallized and purified. The purified DPT was then vacuum dried at 90 DEG C for 24 hours to give 162 g of DPT. At this time, the reaction yield was 85%, and the purity of DPT was 99.8% as a result of GC analysis.

Production Example 2. Synthesis of DPT using TPA

DPT was synthesized in the same manner as in Preparation Example 1, except that 1.27 g (0.017 mol) of dimethylformamide was added as an organic catalyst. As a result of synthesis, the reaction yield was 84%, and the purity of DPT was 99.7% by GC analysis.

Production Example 3. Synthesis of DPT using DMT

100 g (0.51 mol) of DMT (manufactured by SK Chemicals), 2.0 g (0.015 mol) of aluminum chloride and 200 g of toluene were placed in a 1 L round bottom flask equipped with a stirrer, a stirrer, a nitrogen gas inlet, After the addition, the mixture was stirred at room temperature. 1.10 mol of a phosgene gas was injected into the flask at normal pressure for 10 hours and reacted. Thereafter, nitrogen was injected for 2 hours to remove the residual phosgene and the hydrochloric acid gas as a by-product to obtain a transparent and homogeneous reaction solution. As a result of GC analysis of the reaction solution, the ratio of TPC was 48% by weight and the reaction yield was 89%.

Then, 50% by weight of the total amount of toluene was removed from the reaction solution by distillation under reduced pressure. Then, a phenol solution obtained by dissolving 100 g (1.06 mol) of phenol in 100 g of toluene was added to the reaction solution for 2 hours using a dropping funnel and stirred for 1 hour. After completion of the reaction, toluene was removed from the reaction solution by distillation under reduced pressure, and the obtained crude DPT was recrystallized and purified. Then, the purified DPT was vacuum-dried at 90 DEG C for 24 hours to obtain 85 g of DPT. The reaction yield of the obtained DPT was 87%, and the purity of DPT was 99.7% by GC analysis.

Production Example 4. Synthesis of DPT using TPA

100 g (0.6 mol) of TPA, 565 g (6 mol) of phenol and 1.83 g (0.01 mmol) of zinc acetate (Zn (OAc) ₂ ) catalyst are introduced into a 1 L autoclave equipped with a stirrer, cooling condenser and thermometer Respectively. Thereafter, the temperature was elevated to 100 ° C, stirred, pressurized to 1 kgf / cm 2, and heated at 200 ° C for 10 hours. The reaction by-product, water, was discharged out of the autoclave. After completion of the reaction, excess amount of phenol was removed by distillation under reduced pressure to obtain finally obtained solid product containing unreacted material.

Thereafter, 136 g of the unreacted material-containing solid product, 282 g of phenol, 400 g of toluene and 0.92 g of zinc acetate were charged into the autoclave as described above, and then stirred at room temperature. Thereafter, the temperature was elevated to 100 ° C and the reaction was carried out at normal pressure for 10 hours. The reaction by-product, water, was discharged from the autoclave. After completion of the reaction, the reaction product was cooled to 50 DEG C and the reaction product was subjected to solid-liquid separation using a filter. Then, toluene was removed from the separated toluene solution using an evaporator, and the obtained crude DPT was recrystallized and purified. Thereafter, the purified DPT was vacuum-dried at 90 DEG C for 24 hours to obtain 80 g of DPT. At this time, the reaction yield was 42%.

Production Example 5. Synthesis of DPT using DMT

100 g (0.51 mol) of DMT (manufactured by SK Chemical), 480 g (5.10 mol) of phenol and 1.72 g (0.01 mol) of p-toluenesulfonic acid (p-toluenesulfonic acid) were placed in a 1 L autoclave equipped with a stirrer, a cooling condenser and a thermometer. toluenesulfonic acid). Thereafter, the mixture was heated to 100 DEG C and stirred, and then the mixture was pressurized to 1 kgf / cm &lt; 2 &gt;, and the reaction was carried out at 200 DEG C for 10 hours. Methanol, which is a reaction byproduct generated at this time, was flowed out of the autoclave. After the completion of the reaction, excess phenol was removed by distillation under reduced pressure to obtain a finally obtained solid product containing the unreacted product.

Then, 140 g of the unreacted material-containing solid product, 240 g of phenol, 400 g of toluene and 0.86 g of p-toluenesulfonic acid were added to the autoclave as described above and then stirred at room temperature. Thereafter, the temperature was elevated to 100 ° C and the reaction was carried out at normal pressure for 10 hours. Methanol, which is a byproduct of the reaction, was flowed out of the autoclave. After completion of the reaction, the reaction product was cooled to room temperature, and the reaction product was subjected to solid-liquid separation using a filter. Then, the toluene was removed from the separated toluene solution using an evaporator, and the obtained crude DPT was recrystallized and purified. Thereafter, the purified DPT was vacuum-dried at 90 DEG C for 24 hours to obtain 106 g of DPT, and the reaction yield was 65%.

Example 1: Production of polycarbonate ester based on a high-temperature bio

(13.7 mol) of isosorbide (ISB, manufactured by Roquette Freres), 436 g (1.37 mol) of DPT obtained in Preparation Example 1, 444 g (1.37 mol) of DPCD (manufactured by SK Chemicals) 2,345 g (10.96 mol) of DPC (manufactured by Changfeng) and 2 g of a sodium aluminate (NaAlO ₂ ) aqueous solution having a concentration of 1% were placed and heated to 150 ° C. After reaching 150 ° C, the pressure was reduced to 400 torr and then the temperature was raised to 190 ° C for 1 hour. The phenol as a by-product of the polymerization reaction started to flow out at a temperature elevation. After reaching 190 ° C, the pressure was reduced to 100 torr, maintained for 20 minutes, and then heated to 230 ° C for 20 minutes. After reaching 230 캜, the pressure was reduced to 10 torr and the temperature was raised to 250 캜 for 10 minutes. The pressure was reduced to 1 torr or less at 250 DEG C, and the reaction was continued until the target stirring torque reached. When the target agitation torque is reached, the reaction is terminated and the strand polymerized material discharged by pressurization is quenched in a water bath and then cut with a pellet. Polymerization Polycarbonate ester had a glass transition temperature (Tg) of 168 占 폚 and an intrinsic viscosity (IV) of 0.54 dL / g.

Examples 2 to 10. Manufacture of polycarbonate esters based on high-temperature bio materials

Polycarbonate esters were prepared in the same manner as in Example 1 except that the compositions of the polymer samples were used in the amounts shown in Table 1 below.

Comparative Example 1. Preparation of bio-based polycarbonate ester using CHDM

DPCD was not used and DPT obtained in Production Example 1, 2549 g (11.9 mol) of DPC, 1988 g (13.6 mol) of ISB and 490 g (3.4 mol) of 1,4-cyclohexanedimethanol CHDM, manufactured by SK Chemical Co., Ltd.) was used as the polycarbonate ester. Polymerization Polycarbonate ester had a Tg of 155 占 폚 and an IV of 0.55 dL / g.

Comparative Examples 2 to 3.

Polycarbonate esters were prepared in the same manner as in Comparative Example 1, except that the compositions of the polymer samples were used in the amounts shown in Table 1 below.

Test example. Property evaluation

The properties of the polycarbonate esters of Examples 1 to 10 and Comparative Examples 1 to 3 were evaluated by the following methods. The measured physical properties are shown in Table 1 below.

Glass transition temperature (Tg) measurement

The glass transition temperature was measured using a differential scanning calorimeter (Q20, TA INSTRUMENTS) according to ASTM D3418.

Measurement of light transmittance (T)

The light transmittance of a specimen having a thickness of 4 mm was measured using a spectrophotometer (CM-3600A, Konica Minolta) according to ASTM D1003.

Melt flow index ( MFI ) Measure

The melt flow index was measured using a melt indexer (G-01, TOYOSEIKI) according to ASTM D1238 under conditions of 260 ° C and 2.16 kg load.

As shown in Table 1, the diphenyl terephthalate (DPT) represented by the formula (5) was prepared according to the production method of the present invention, and the high heat resistant biocarbon based polycarbonate esters of Examples 1 to 10 prepared using the same Based polycarbonate ester copolymerized only with conventional DPC and 1,4-diphenyl-cyclohexanedicarboxylate (DPCD), the glass transition temperature was high and it was suitable for applications requiring high heat resistance.

Further, in the case where the content of the repeating units of DPCD is increased (Examples 1 and 2 and Examples 4 to 6), the glass transition temperature is decreased as the content of the aliphatic cyclic monomer increases, but the melt flow rate is increased Respectively.

Further, when the content of DPT repeating units was increased (Examples 2 to 4 and Examples 6 to 8), it was confirmed that the glass transition temperature was increased but the melt flow index was decreased. Particularly, it can be seen that the melt flow index is similar in Example 3, even though the glass transition temperature is higher than that in Example 1, and the melt flow index is similar in Example 7, even though the glass transition temperature is higher than in Examples 1 and 3. Also, in Example 10, the glass transition temperature had the maximum value among the examples, but the melt flow index was relatively low due to the low content of DPCD repeating units.

In addition, the light transmittances of Examples 1 to 10 were all 90% or more, which is equal to or higher than 90% of maximum light transmittance of BPA polycarbonate products having the same level of heat resistance, And the light transmittance was more than 91%.

On the other hand, the bio-based polycarbonate esters of Comparative Examples 1 to 3 using 1,4-cyclohexane dimethanol (CHDM) had low glass transition temperatures and were not suitable for high heat resistance applications, The melt flow index was not high. In particular, in Comparative Example 3, the light transmittance was decreased as the content of the DPT repeating unit was increased.

Therefore, by controlling the content of the repeating unit of 1,4-diphenyl-cyclohexanedicarboxylate and diphenylterephthalate and the ratio of the carbonate to the ester bond according to the target properties corresponding to the high heat resistance use, It is possible to control the strength and weakness of physical properties, and thus the highly heat-resistant bio-based polycarbonate ester thus prepared is excellent in heat resistance, transparency and fluidity, and can be used for various high heat resistance applications.

Claims (14)

1. A repeating unit 1 represented by the following formula (1);

   A repeating unit 2 represented by the following formula (2); And

   1. A high heat resistant bio-based polycarbonate ester comprising: a repeating unit 3 represented by the following formula (3):

   [Chemical Formula 1]

   

   (2)

   

   (3)

   
2. The method according to claim 1,

   Wherein said recurring unit 1 is obtained from the reaction of 1,4: 3,6-dianhydrohexitol and carbonate,

   Wherein said repeating unit 2 is obtained from the reaction of 1,4: 3,6-dianhydrohexitol and 1,4-cyclohexanedicarboxylate,

   Wherein the repeat unit 3 is obtained from the reaction of 1,4: 3,6-dianhydrohexitol and terephthalate.
3. The method according to claim 1,

   Wherein the high-temperature-resistant bio-based polycarbonate ester comprises the repeating units 1 to 3,

   X is a real number of more than 0 and less than 1, y is a real number of more than 0 and not more than 0.7, z is a real number of more than 0 and not more than 0.6, and x + y + z is 1. A high heat resistant biobased polycarbonate ester.
4. The method according to claim 1,

   Wherein the high temperature resistant biobased polycarbonate ester has a glass transition temperature of 160 to 240 DEG C and a melt flow index at 260 DEG C and a load of 2.16 kg of 5 to 150 g / 10 minutes.
5. (1) a compound represented by the following formula (4) is converted into an intermediate reactant having a halogen functional group at the terminal thereof, followed by nucleophilic reaction with a phenol or a phenol substituent, or a phenol or phenol substituent is transesterified or Esterification to prepare a compound represented by the following formula (5); And

   (2) a compound represented by the following general formulas (5) to (7) and 1,4: 3,6-dianhydrohexitol under the melt polycondensation reaction to obtain a compound containing the repeating units 1 to 3 represented by the following general formulas A method for producing a high-temperature bio-based polycarbonate ester, comprising:

   [Chemical Formula 1]

   

   (2)

   

   (3)

   

   [Chemical Formula 4]

   

   [Chemical Formula 5]

   

   [Chemical Formula 6]

   

   (7)

   

   In the above formulas,

   R &lt; ¹ &gt; are each independently methyl or hydrogen,

   R ² and R ³ are each independently an alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms, and the aryl group is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 4 to 20 carbon atoms, an aryl group having 6 to 18 carbon atoms , An alkoxy group having 1 to 18 carbon atoms, a cycloalkoxy group having 4 to 20 carbon atoms, an aryloxy group having 6 to 18 carbon atoms, an alkylsulfonyl group having 1 to 18 carbon atoms, a cycloalkylsulfonyl group having 4 to 20 carbon atoms, An arylsulfonyl group, and an ester substituent.
6. 6. The method of claim 5,

   Wherein the high-temperature-resistant bio-based polycarbonate ester comprises the repeating units 1 to 3,

   X is a real number of more than 0 and less than 1, y is a real number of more than 0 and not more than 0.7, z is a real number of more than 0 and not more than 0.6, x + y + z = 1. &lt; / RTI &gt;
7. 6. The method of claim 5,

   Wherein the intermediate reactant having a halogen functional group at the terminal is a compound represented by the following formula (8): &lt; EMI ID =

   [Chemical Formula 8]

   

   In Formula 8,

   R &lt; ⁴ &gt; are each independently F, Cl or Br.
8. 8. The method of claim 7,

   Wherein the molar ratio of the compound represented by the formula (8) to the phenol or phenol substituent is 1: 1 to 5 in the nucleophilic reaction of the step (1).
9. 6. The method of claim 5,

   An intermediate reactant containing a halogen functional group at the terminal is obtained by reacting a compound represented by the above formula 4 with a halogenated compound,

   Wherein the halogenated compound is selected from the group consisting of phosgene, triphosgene, thionyl chloride, oxalyl chloride, phosphorus trichloride, phosphorus pentachloride, Wherein the at least one polycarbonate ester is at least one selected from the group consisting of phosphorus pentabromide and cyanuric fluoride.
10. 6. The method of claim 5,

    Wherein the conversion of the step (1) to an intermediate reactant is carried out at atmospheric pressure and a temperature of -30 to 150 캜 for 5 minutes to 48 hours.
11. 6. The method of claim 5,

    Wherein the compound represented by the general formula (7) is diphenyl carbonate or a substituted diphenyl carbonate.
12. 6. The method of claim 5,

    Wherein the ester exchange or esterification reaction of step (1) is carried out at 20 to 300 占 폚.
13. 6. The method of claim 5,

    Wherein the molar ratio of the compound represented by the formula (4) to the phenol or phenol substituent is 1: 2 to 40 in the ester exchange or esterification reaction of the step (1).
14. 6. The method of claim 5,

    The melt polycondensation reaction of step (2)

    (2-1) a step of reducing the pressure of 50 to 700 torr and a first reaction at 130 to 250 ° C for 0.1 to 10 hours; And

    (2-2) a step of secondary reaction at a reduced pressure of 0.1 to 20 torr and at a temperature of 200 to 350 DEG C for 0.1 to 10 hours.