JP2000001534A - Method for producing aromatic-aliphatic copolymerized polycarbonate - Google Patents

Abstract

(57) [Problem] To provide a method for producing an aromatic-aliphatic copolymer polycarbonate having excellent color tone. A reaction apparatus is made of a material having an iron content of 21% by weight or less in a part in contact with a reaction mixture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a transparent aromatic-aliphatic copolymer polycarbonate having excellent impact strength, high refractive index and inverse dispersion value, low photoelastic constant and excellent hue. The polycarbonate resin can be suitably used for optical materials such as various lenses, prisms, optical disk substrates, and optical fibers.

[0002]

2. Description of the Related Art A polycarbonate obtained by interfacial polymerization of an aromatic dihydroxy compound such as bisphenol A and phosgene in the presence of an acid binder is excellent in mechanical properties such as impact resistance, heat resistance and transparency. It is used as an optical material for various lenses, prisms, optical disk substrates, and the like. However, in the polycarbonate using only bisphenol A as the aromatic dihydroxy compound, the photoelastic constant is large and the melt fluidity is relatively poor, so that the birefringence of the molded product becomes large, and the refractive index is as high as 1.58. Abbe number is 30
Therefore, there is a drawback that it does not have sufficient performance to be widely used for applications such as optical recording materials and optical lenses. For the purpose of solving such a drawback of bisphenol A-polycarbonate, the present inventors have previously described aromatic-aliphatic copolymerized polycarbonate (Japanese Patent Application No. 8-27626).
0) was proposed. The aromatic-aliphatic copolymerized polycarbonate has excellent impact resistance and heat resistance, and furthermore, has a small photoelastic constant and a high Abbe number, so that it can be widely used as an optical material. The aromatic-aliphatic copolymerized polycarbonate is difficult to produce by a normal phosgene method, and is a method known as a transesterification method, that is, an aromatic dihydroxy compound and an aliphatic dihydroxy compound, and a carbonate diester such as diphenyl carbonate. Is preferably used in a polycondensation reaction by transesterification in the molten state.

However, when the aromatic-aliphatic copolymerized polycarbonate is produced by a transesterification reaction, 200
Since the polycondensation is performed while heating to a temperature of from about 300C to about 300C, there is a disadvantage that it is difficult to obtain a product having excellent quality such as deterioration of color due to a long-term heat history at a high temperature. In particular, when a carbon steel reactor is used, deterioration of the color tone is unavoidable even when techniques such as shortening the reaction time and lowering the reaction temperature are used. For this reason, the aromatic-
Even when aliphatic polycarbonates are produced on a large scale, it has been difficult to use them in fields requiring excellent color tone.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems associated with the prior art as described above, and has excellent impact resistance, heat resistance, high Abbe number and low photoelastic constant, and An object of the present invention is to provide a method for producing the aromatic-aliphatic polycarbonate having an excellent color tone.

[0005]

SUMMARY OF THE INVENTION The present invention aims to solve the problems associated with the prior art described above, and in particular, to obtain the aromatic-aliphatic copolymer polycarbonate having excellent color tone. It is in.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to solve these problems, and as a result, the above formula (1)
In producing an aromatic-aliphatic copolymerized polycarbonate resin by melt-polycondensing an aromatic dihydroxy compound represented by the following formula, an aliphatic dihydroxy compound represented by the formula (2), and a carbonic acid diester, As the material,
It has been found that an aromatic-aliphatic copolymer polycarbonate resin excellent in color tone can be obtained by using a reaction apparatus made of a material having a content of iron of 21% or less in a part in contact with the reaction mixture. The invention has been reached.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for producing an aromatic-aliphatic copolymer polycarbonate resin according to the present invention will be specifically described.

[0008] The reactor used in the present invention is characterized in that, as a material, the iron content of the liquid contact portion with the reaction mixture is 20% by weight.
Or less, more preferably 10% by weight or less. That is, this is a reactor manufactured using a pure metal or an alloy whose material in contact with the reaction mixture has an iron content of 21% by weight or less.

As the material, specifically, Hastelloy B
(61% by weight of nickel, 26-30% by weight of molybdenum,
4-7% by weight of iron, 1% by weight of chromium, Hastelloy C (51-54% by weight of nickel, 16-17% by weight of molybdenum), 4-7% by weight of iron, 15-16% by weight of chromium, 3-4.5% of tungsten Weight%, cobalt 2.5 weight%), Hastelloy G (nickel 42-49 weight%, chromium 21.
0-23.5 wt%, molybdenum 5.5-7.5 wt%, iron 18.0-21.0 wt%, copper 1.5-2.5 wt%, niobium 1.75-2.5 wt% %), Nickel 20
0 (99.5 wt% nickel, 0.08 wt% carbon, 0.15 wt% iron), cupronickel (30 wt% nickel, 69 wt% copper, 0.6 wt% iron), Monel 400
(66% by weight of nickel, 31.5% by weight of copper, 1.35% of iron)
Wt%), Inconel 600 (76 wt% nickel, 16 wt% chromium, 7.2 wt% iron), Inconel 702
(80% by weight of nickel, 13% by weight of chromium, 6.5% by weight of iron), ilium G (58% by weight of nickel, chromium 2
2.5% by weight, iron 6.5% by weight, molybdenum 6.4% by weight, copper 6.5% by weight), Dura nickel 301 (95% by weight of nickel, 4.4% by weight of aluminum, 0.4% by weight of titanium).
45 wt%, iron 0.15 wt%), aluminum bronze C
6301 (80% by weight of copper, 9.5% by weight of aluminum,
Nickel 5% by weight, iron 5% by weight), aluminum bronze A
IBC3 (copper 81% by weight, aluminum 9.5% by weight,
4.5% iron by weight, Admiralty brass C4430 (71% copper, 28% zinc, 1% tin by weight), Naval brass C4640 (60% copper, 39.2% zinc by weight, 0.8% tin) %), Glass, ceramics, polyfluoroethylene, and the like, but are not limited thereto. Further, the material according to the present invention may contain elements such as carbon, manganese, sulfur, silicon, phosphorus, and vanadium as components.

[0010] The reactor in the present invention is not limited to the polymerization tank alone, but includes all parts in contact with liquids involved in the reaction, such as reaction mixtures and / or reaction by-products and / or raw materials. Contains. Specific examples thereof include, but are not limited to, a raw material dissolving tank, a polymerization tank, a reaction liquid stirring blade, a reflux tower, a polymer pump gear pump, and piping connecting these.

In the reaction apparatus, each device portion including the liquid-contacting portion may be integrally molded with a material having an iron content of 21% by weight or less, or the surface of the liquid-contacting portion may be formed by operations such as plating, thermal spraying and pasting. Alternatively, a layer made of a material having an iron content of 21% by weight or less may be formed.

If necessary, the surface of the liquid-contacting portion is preferably subjected to a surface treatment such as an acid treatment, an alkali treatment, an organic material treatment such as phenol or acetone, a mechanical polishing treatment such as a buff polishing, and an electrolytic polishing treatment. .

The aromatic-aliphatic copolycarbonate according to the present invention comprises a structural unit derived from an aromatic dihydroxy compound represented by the above formula (1) and a compound represented by the above formula (2)
Consisting of structural units derived from an aliphatic dihydroxy compound represented by the formula, is a random, block, or alternating copolymer, and has excellent impact resistance, excellent heat resistance, and an excellent balance of physical properties of refractive index and Abbe number. Material.

In the present invention, the molar ratio (1) / (2) of the structural units derived from the aromatic dihydroxy compound and the aliphatic dihydroxy compound is 90.
/ 10 to 10/90, more preferably 80/20 to 20/80. That is,
When the molar ratio (1) / (2) of the structural unit derived from the aromatic dihydroxy compound and the aliphatic dihydroxy compound in the aromatic-aliphatic polycarbonate is lower than 10/90, the heat resistance becomes poor, and If it is higher than 10, the photoelastic constant, the water absorption and the like will increase, and the balance between the refractive index and the Abbe number will worsen, which is not preferable as an optical material.

In the present invention, diphenyl carbonate, ditolyl carbonate, bis (chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate and the like are used as the carbonic acid diester. . Among these, diphenyl carbonate is particularly preferred. Diphenyl carbonate is used in an amount of 0.97 to 0.9 mol based on a total of 1 mol of the aromatic dihydroxy compound and the aliphatic dihydroxy compound.
It is preferably used in an amount of 1.2 mol, particularly preferably 0.99 to 1.10 mol.

The aromatic-aliphatic copolymer polycarbonate according to the present invention has a weight average molecular weight of 30,000 to 20.
It is preferably 0000, more preferably 5
It is between 0000 and 120,000.

The aromatic-aliphatic copolymer polycarbonate resin is produced by a melt polycondensation method. That is, by using the aromatic dihydroxy compound represented by the above formula (1), the aliphatic dihydroxy compound represented by the above formula (2), a carbonic acid diester and a catalyst, by-products are heated under atmospheric pressure or reduced pressure. Melt polycondensation is performed while removing.
The reaction is generally carried out in two or more stages.

Specifically, the first-stage reaction is carried out at 120 to 260
The reaction is carried out at a temperature of 180C, preferably 180 to 240C for 0 to 5 hours, preferably 0.5 to 3 hours. Next, the degree of reaction is increased while increasing the degree of vacuum of the reaction system, and finally the polycondensation reaction is carried out at a temperature of 200 to 300 ° C. under a reduced pressure of 1 mmHg or less. Further, the reaction device used for performing the above reaction may be a tank type or an extruder type.

As the polymerization catalyst, a basic compound is used. Examples of such a basic compound include an alkali metal compound, an alkaline earth metal compound, a nitrogen-containing compound and the like, and these compounds can be used alone or in combination.

As such an alkali metal compound,
Organic acid salts of inorganic metals, inorganic acid salts, oxides, hydroxides, hydrides, alcoholates and the like are used, and specifically, sodium hydroxide, potassium hydroxide, cesium hydroxide, lithium hydroxide, hydrogen carbonate Sodium, potassium bicarbonate, lithium bicarbonate, sodium carbonate, potassium carbonate, cesium carbonate, lithium carbonate, sodium acetate,
Potassium acetate, cesium acetate, lithium acetate, sodium stearate, potassium stearate, cesium stearate, lithium stearate, sodium borohydride, lithium borohydride, sodium borohydride, sodium benzoate, potassium benzoate, benzoic acid Cesium, lithium benzoate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, dilithium hydrogen phosphate, disodium phenylphosphate, dipotassium phenylphosphate, dilithium phenylphosphate, disodium salt of bisphenol A, 2 Potassium salts, dicesium salts, dilithium salts, sodium salts of phenol, potassium salts, cesium salts, lithium salts and the like are used.

Further, as the alkaline earth metal compound,
Alkaline earth metal organic acid salts, inorganic acid salts, oxides, hydroxides, hydrides, alcoholates and the like are used, specifically, calcium hydroxide, barium hydroxide, magnesium hydroxide, strontium hydroxide, Calcium bicarbonate,
Barium bicarbonate, magnesium bicarbonate, strontium bicarbonate, calcium carbonate, barium carbonate, magnesium carbonate, strontium carbonate, calcium acetate, barium acetate, magnesium acetate, strontium acetate,
Calcium stearate, barium stearate, magnesium stearate, strontium stearate,
Are used.

As the nitrogen-containing compound, quaternary ammonium hydroxide, quaternary ammonium salts, amines and the like are used. Specifically, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutyl Ammonium hydroxides having alkyl, aryl, araryl groups such as ammonium hydroxide, trimethylbenzyl ammonium hydroxide, etc., tertiary amines such as trimethylamine, triethylamine, dimethylbenzylamine, triphenylamine, dimethylamine, diethylamine, etc. Secondary amine, methylamine, primary amines such as ethylamine, 2-methylimidazole, 2-phenylimidazole, imidazoles such as,
Alternatively, basic salts such as ammonia, tetramethylammonium borohydride, tetrabutylammonium borohydride, tetrabutylammonium tetraphenylborate, tetramethylammonium tetraphenylborate and the like are used.

These catalysts are used in an amount of 10 ^-9 to 10 mol per 1 mol of a total of the aromatic dihydroxy compound represented by the above formula (1) and the aliphatic dihydroxy compound represented by the above formula (2).
An amount of 10 ^-3 mol is used, preferably an amount of 10 ^-7 to 10 ^-5 mol.

As the aromatic dihydroxy compound represented by the above formula (1), specifically, bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) propane, 2,2-
Bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 1 , 1-bis (4-hydroxy-3-
t-butylphenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclopentane, 1,1-bis (4-hydroxyphenyl) cyclohexane 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3,3'-dimethylphenyl ether, 4,4'-dihydroxyphenyl sulfide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide, 4,4'-dihydroxydiphenylsulfoxide,
4,4'-dihydroxy-3,3'-dimethyldiphenylsulfoxide, 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenylsulfone and the like. Among these, in particular 2,2-bis (4-hydroxyphenyl) propane, ie bisphenol A or
1,1-bis (4-hydroxyphenyl) cyclohexane is preferred.

As the aliphatic dihydroxy compound represented by the above formula (2), specifically, (3,9-bis (2-hydroxyethyl) -2,4,8,10-tetraoxaspiro ( Five.
5) Undecane), (3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5.5) undecane), (3,9-bis (2- (Hydroxy-1,1-diethylethyl) -2,4,8,10-tetraoxaspiro (5.5) undecane), (3,9-bis (2-hydroxy-1,1-dipropylethyl) -2,4 , 8,10-tetraoxaspiro (5.5) undecane) and the like. Preferably, (3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5.5) undecane) is used. Preferably, (3,9-bis (2-hydroxyethyl) -2,4,8,10-tetraoxaspiro (5.5) undecane) is used.

Further, as the carbonic acid diester, diphenyl carbonate, ditolyl carbonate, bis (chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis (diphenyl) carbonate, diethyl carbonate, dimethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate Are used. Of these, diphenyl carbonate is particularly preferred. Diphenyl carbonate is
It is preferable to use the aromatic dihydroxy compound (1) and the aliphatic dihydroxy compound (2) in an amount of 1.01 to 1.30 mol based on 1 mol in total.

It is preferable to remove or deactivate the catalyst in the polycarbonate resin of the present invention in order to maintain heat stability and hydrolysis stability. In general, a method of deactivating a transesterification catalyst such as an alkali metal or an alkaline earth metal by adding a known acidic substance is suitably performed. As these substances, specifically,
Aromatic sulfonic acid esters such as p-toluenesulfonic acid, aromatic sulfonic acid esters such as butyl paratoluenesulfonic acid, organic halides such as stearic acid chloride, butyric acid chloride, benzoyl chloride, and toluenesulfonic acid chloride; Organic halides such as alkyl sulfates and benzyl chloride are preferably used.

After deactivation of the catalyst, low-boiling compounds in the polymer are removed.
A step of devolatilization and removal at a pressure of 0.1 to 1 mmHg and a temperature of 200 to 300 ° C. may be provided. For this purpose, paddle blades, lattice blades,
A horizontal kneader or a thin film evaporator having eyeglasses or the like is preferably used.

In the present invention, the above-mentioned heat stabilizer,
In addition to the hydrolysis stabilizer, antioxidants, pigments, dyes, reinforcing agents and fillers, ultraviolet absorbers, lubricants, release agents, crystal nucleating agents, plasticizers, flow improvers, antistatic agents, etc. Can be added. Further, for the purpose of further improving the properties of the resin, another polycarbonate resin or a thermoplastic resin may be blended and used.

Each of these additives can be mixed with a polycarbonate resin by a conventionally known method. For example, a method in which each component is dispersed and mixed by a high-speed mixer represented by a turnbull mixer, a Henschel mixer, a ribbon blender, or a super mixer, and then melt-kneaded by an extruder, a Banbury mixer, a roll, or the like is appropriately selected.

[0031]

According to the present invention, a large amount of an aromatic-aliphatic copolymer polycarbonate excellent in impact resistance, heat resistance, weather resistance and transparency, having a high Abbe number and a low photoelastic constant and excellent color tone. It can be supplied to a wide range of optical transparent materials such as various kinds of optical lenses, particularly, spectacle lenses, prisms, optical disc substrates, and optical fibers, which require particularly excellent color tone.

Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to the following Examples. The physical properties were measured by the following methods. (1) Weight average molecular weight: GP using chloroform as a solvent
C (Shodex System-11, column temperature 4
0 ° C.) as a molecular weight in terms of polystyrene. (2) YI (yellow index): The polymer was press-molded into a disk having a diameter of 45 mm and a thickness of 3 mm, and measured by a color difference meter (Tokyo Denshoku TC-1800MK).

Example 1 2,2-bis (4-hydroxyphenyl) propane 2
2.8 g (0.10 mol), 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-
Tetraoxaspiro (5.5) undecane 30.4 g
(0.10 mol), 43.3 g of diphenyl carbonate
(0.202 mol), sodium bicarbonate 6.0 × 10
−7 mol was put into a Hastelloy B 300 cc separable flask equipped with a Hastelloy B stirring blade and a distilling apparatus, heated to 180 ° C. under a nitrogen atmosphere, and stirred for 30 minutes. Thereafter, the degree of pressure reduction was adjusted to 150 mmHg, and at the same time, the temperature was raised to 200 ° C. at a rate of 60 ° C./hr to perform a transesterification reaction. Further, the temperature was raised to 260 ° C. while distilling off phenol, and the temperature was maintained at that temperature for 10 minutes, and the degree of reduced pressure was reduced to 1 mmHg or less over 1 hour.
The reaction was carried out under stirring for a total of 6 hours. After the reaction was completed, nitrogen was blown into the reactor to return to normal pressure, and the produced polycarbonate was taken out. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 2 In Example 1, except that the materials of the stirring blade, the distilling device and the 300 cc separable flask were changed to Hastelloy G,
The same operation as in Example 1 was performed to obtain a polycarbonate. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 3 In Example 1, except that the materials of the stirring blade, the distilling apparatus and the 300 cc separable flask were changed to nickel 200,
The same operation as in Example 1 was performed to obtain a polycarbonate. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 4 Polycarbonate was obtained in the same manner as in Example 1 except that the materials for the stirring blade, the distilling apparatus, and the 300 cc separable flask were changed to Monel 400. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 5 A polycarbonate was obtained in the same manner as in Example 1, except that the materials for the stirring blade, the distilling apparatus, and the 300 cc separable flask were changed to Inconel 600. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 6 Polycarbonate was obtained in the same manner as in Example 1 except that the materials for the stirring blade, the distilling apparatus, and the 300 cc separable flask were changed to Dura Nickel 301. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 7 A polycarbonate was obtained in the same manner as in Example 1, except that the materials for the stirring blade, the distilling apparatus, and the 300 cc separable flask were changed to aluminum bronze C6301. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Example 8 A polycarbonate was obtained in exactly the same manner as in Example 1, except that the materials for the stirring blade, the distilling device, and the 300 cc separable flask were changed to Admiralty brass. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Comparative Example 1 In Example 1, the materials of the stirring blade, the distilling apparatus and the 300 cc separable flask were SUS304 (nickel 8 to 1).
0.5% by weight, 18 to 20% by weight of chromium, and about 72% by weight of iron), except that the same operation as in Example 1 was performed to obtain a polycarbonate. Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

Comparative Example 2 A polycarbonate was obtained in exactly the same manner as in Example 1, except that the materials for the stirring blade, the distilling apparatus, and the 300 cc separable flask were changed to low carbon steel.
Table 1 shows the physical properties of the aromatic-aliphatic copolymerized polycarbonate.

[0043]

[Table 1]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4J029 AA09 AA10 AB04 AC02 AD01 AE04 AE05 BB12A BB12B BB13A BB13B BE04 BE05A BE05B BF14A BF14B BF30 BH02 BH07 HA01 HC02 HC03 HC04A HC05A HC05B KE05 LA00

Claims (8)

[Claims] An aromatic dihydroxy compound obtained by melt polycondensation of an aromatic dihydroxy compound represented by the following formula (1), an aliphatic dihydroxy compound represented by the following formula (2), and a carbonic acid diester: In producing a polymerized polycarbonate resin, an aromatic-fatty material is used as the material of the reaction device, the reaction device being made of a material having an iron content of 21% by weight or less in a part in contact with the reaction mixture. For producing an aromatic copolymer polycarbonate. Embedded image (In the above formula (1), X is Wherein R ₃ and R ₄ are a hydrogen atom or a carbon atom
And R3 and R4 may combine to form a ring. R ₁ and R ₂ is a hydrogen atom or an alkyl group or a halogen having 1 to 10 carbon atoms, R ₁
And R ₂ may be the same or different. Further, m and n represent the number of substituents and are integers of 0 to 4. ) (In the above formula (2), R ₅ , R ₆ , R ₇ and R ₈ are a hydrogen atom or a monovalent alkyl group having 1 to 10 carbon atoms.) 2. A reaction apparatus comprising a material having a nickel and / or molybdenum content of 60% by weight or more in a part in contact with a reaction mixture as a material of the reaction apparatus. A method for producing the aromatic-aliphatic copolymer polycarbonate resin according to the above. 3. A reactor which is made of a material having a nickel and / or copper content of 60% by weight or more in a part in contact with the reaction mixture as a material of the reactor. A method for producing the aromatic-aliphatic copolymer polycarbonate resin according to the above. 4. The material of the reactor, wherein the content of nickel and / or chromium in the part in contact with the reaction mixture is 60%.
2. The method for producing an aromatic-aliphatic copolymer polycarbonate resin according to claim 1, wherein a reactor made of a material having a content of not less than% by weight is used. 5. A reactor which is made of a material having a nickel and / or aluminum content of 60% by weight or more in a part in contact with the reaction mixture as a material of the reactor. A method for producing the aromatic-aliphatic copolymer polycarbonate resin according to the above. 6. The material of the reaction apparatus is such that the content of copper and / or aluminum in the part in contact with the reaction mixture is 60%.
2. The method for producing an aromatic-aliphatic copolymer polycarbonate resin according to claim 1, wherein a reactor made of a material having a content of not less than% by weight is used. 7. The reaction apparatus according to claim 1, wherein the reaction apparatus is made of a material having a copper and / or zinc content of 60% by weight or more in a part in contact with the reaction mixture. A method for producing the aromatic-aliphatic copolymer polycarbonate resin according to the above. 8. The method according to claim 8, wherein the aliphatic dihydroxy compound is 3,9-
Bis (2-hydroxy-1,1-dimethylethyl)-
2. The aromatic compound according to claim 1, which is 2,4,8,10-tetraoxaspiro (5.5) undecane.
A method for producing an aliphatic copolymerized polycarbonate.