JP2008024919A - Polycarbonate copolymer and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polycarbonate copolymer which has an excellent mechanical strength, heat resistance, a small refractive index, a large Abbe's number, a small birefringence, and excellent transparency, and contains a raw material originated from plants. <P>SOLUTION: This polycarbonate copolymer comprising constituent units originated from a dihydroxy compound represented by the general formula (1) and constituent units originated from an alicyclic dihyroxy compound is characterized in that Abbe's number is ≥50, and 5% thermal reduction temperature is ≥340°C. A method for producing the polycarbonate copolymer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention contains a structural unit that can be derived from a carbohydrate such as starch, which is a biomass resource, is excellent in heat resistance, moldability, and mechanical strength, has a low refractive index, and has a large Abbe number. The present invention relates to a polycarbonate copolymer having optical characteristics and a method for producing the same.

  Polycarbonate is generally produced using raw materials derived from petroleum resources. However, in recent years, there is a concern about the exhaustion of petroleum resources, and there is a demand for providing polycarbonate using raw materials obtained from biomass resources such as plants. In addition, it is feared that global warming due to the increase and accumulation of carbon dioxide emissions will lead to climate change, etc., so that carbon-neutral plant-derived monomers are used as raw materials even after disposal after use. There is a need to develop polycarbonate.

  Conventionally, it has been proposed to use isosorbide as a plant-derived monomer and obtain a polycarbonate by transesterification with diphenyl carbonate (see, for example, Patent Document 1). However, the polycarbonate obtained is brown and is not satisfactory. Further, as a copolymerized polycarbonate of isosorbide and another dihydroxy compound, a polycarbonate copolymerized with bisphenol A has been proposed (for example, see Patent Document 2), and further, by copolymerizing isosorbide and an aliphatic diol. Attempts have been made to improve the rigidity of homopolycarbonate composed of isosorbide (see, for example, Patent Document 3).

  On the other hand, many polycarbonates obtained by polymerizing 1,4-cyclohexanedimethanol, which is an alicyclic dihydroxy compound, have been proposed (for example, Patent Documents 4 and 5). The molecular weight of these polycarbonates is as low as about 4000 at most. Therefore, many of them have a low glass transition temperature.

Thus, although a polycarbonate using isosorbide has been proposed, a polycarbonate obtained by copolymerizing isosorbide and an alicyclic dihydroxy compound has not been reported, and optical constants such as a refractive index and an Abbe number are also disclosed. Not done.
GB1079686 Publication JP-A-56-55425 WO 2004/111106 JP-A-6-145336 Japanese Patent Publication No. 63-12896

  The polycarbonates described in Patent Documents 1 to 5 are insufficient in terms of heat resistance and transparency as compared with conventional aromatic polycarbonates derived from petroleum raw materials, and are difficult to use for optical materials and molding materials. It was. Therefore, it is desired to develop a highly transparent polycarbonate having a small refractive index and a small Abbe number while maintaining the high heat resistance and transparency of the aromatic polycarbonate.

The object of the present invention is to solve the above-mentioned conventional problems, have excellent mechanical strength, heat resistance, low refractive index, large Abbe number, low birefringence, excellent transparency, plant-derived It is providing the polycarbonate copolymer containing a structural unit.

As a result of intensive studies to solve the above problems, the present inventor has found that a polycarbonate copolymer obtained from a dihydroxy compound represented by the following general formula (1) and an alicyclic dihydroxy compound has a mechanical strength. It has been found that it has excellent heat resistance, a low refractive index, a large Abbe number, a small birefringence, and excellent transparency.
That is, the gist of the present invention resides in the following [1] to [13].

[1] A polycarbonate copolymer comprising a structural unit derived from a dihydroxy compound represented by the following general formula (1) and a structural unit derived from an alicyclic dihydroxy compound, wherein the Abbe number is 50 or more, And a polycarbonate copolymer having a 5% heat loss temperature of 340 ° C. or higher.

[2] A polycarbonate copolymer including a structural unit derived from a dihydroxy compound represented by the following general formula (1) and a structural unit derived from an alicyclic dihydroxy compound, and comprising all of the constituents of the copolymer The polycarbonate copolymer characterized by the ratio of the dihydroxy compound and alicyclic dihydroxy compound represented by the following general formula (1) with respect to the dihydroxy compound being 90 mol% or more.

[3] The polycarbonate copolymer according to [1], wherein the ratio of the dihydroxy compound represented by the general formula (1) to the alicyclic dihydroxy compound with respect to all dihydroxy compounds constituting the polycarbonate copolymer is 90 mol% or more. Polymer.

[4] The polycarbonate copolymer according to any one of [1] to [3], wherein the alicyclic dihydroxy compound includes a 5-membered ring structure or a 6-membered ring structure.

[5] The polycarbonate copolymer according to [4], wherein the alicyclic dihydroxy compound contains 30 or less carbon atoms.

[6] The alicyclic dihydroxy compound is at least one compound selected from the group consisting of cyclohexanedimethanol, tricyclodecanedimethanol, adamantanediol, and pentacyclopentadecanedimethanol [5] The polycarbonate copolymer described in 1.

[7] The polycarbonate copolymer according to any one of [1] to [6], which has a photoelastic coefficient of 20 × 10 ⁻¹² Pa ⁻¹ or less.

[8] The polycarbonate copolymer according to any one of [1] to [7], wherein the Izod impact strength is 30 J / m ² or more.

[9] The polycarbonate copolymer according to any one of [1] to [8], wherein the amount of generated gas other than the phenol component per unit area at 110 ° C. is 5 ng / cm ² or less.

[10] The structural unit derived from the dihydroxy compound represented by the general formula (1) includes a structural unit derived from at least one selected from the group consisting of isosorbide, isomannide, and isoidide. [1] The polycarbonate copolymer according to any one of [9].

[11] The reduced viscosity at a concentration of 1.00 g / dl at 20 ° C. ± 0.1 ° C. in a 1: 1 weight ratio solution of phenol and 1,1,2,2-tetrachloroethane is 0.40 dl / g or more. The polycarbonate copolymer according to any one of [1] to [10].

[12] Any one of [1] to [11], wherein a dihydroxy compound represented by the following general formula (1) and an alicyclic dihydroxy compound are reacted with a carbonic acid diester in the presence of a polymerization catalyst. The manufacturing method of the polycarbonate copolymer of description.

[13] The method for producing a polycarbonate copolymer according to [12], wherein an alkali metal compound and / or an alkaline earth metal compound is used as the polymerization catalyst.

  The polycarbonate copolymer of the present invention has high thermal stability, low refractive index, high Abbe number, and low optical anisotropy. In addition, it has excellent mechanical strength, and the glass transition temperature can be adjusted from 45 ° C to 155 ° C depending on the application, so it needs flexibility, film, sheet field, heat resistance, bottle, container field, Lenses such as camera lenses, viewfinder lenses, CCD and CMOS lenses, retardation films used in liquid crystal and plasma displays, films such as diffusion sheets and polarizing films, sheets, optical disks, optical materials, optical components, dyes In addition, it is possible to provide materials in a wide range of fields such as binder applications for immobilizing charge transfer agents and the like.

  DESCRIPTION OF EMBODIMENTS Embodiments of the present invention will be described in detail below. However, the description of the constituent elements described below is an example (representative example) of an embodiment of the present invention. It is not limited to the contents.

  The polycarbonate copolymer of the present invention comprises a structural unit derived from a dihydroxy compound represented by the following general formula (1) and a structural unit derived from an alicyclic dihydroxy compound.

  In the present invention, examples of the dihydroxy compound represented by the general formula (1) include isosorbide, isomannide, and isoidet, which are related to stereoisomers. These may be used alone or in combination of two kinds. A combination of the above may also be used.

  Among these dihydroxy compounds, isosorbide obtained by dehydrating condensation of sorbitol produced from various starches that are abundant as resources and are readily available is easy to obtain and manufacture, optical properties, moldability From the viewpoint of

  Since isosorbide is gradually oxidized by oxygen, in order to prevent decomposition due to oxygen during storage and handling during production, do not mix moisture, use an oxygen scavenger, or use a nitrogen atmosphere. It is important to set it down. When isosorbide is oxidized, decomposition products such as formic acid are generated. For example, when a polycarbonate is produced using isosorbide containing these decomposition products, the resulting polycarbonate is colored or causes a significant deterioration in physical properties. Moreover, it may affect the polymerization reaction, and a high molecular weight polymer may not be obtained. In addition, when a stabilizer for preventing the generation of formic acid is added, depending on the type of the stabilizer, coloring may occur in the obtained polycarbonate, or physical properties may be significantly deteriorated. As the stabilizer, a reducing agent or an antacid is used. Among them, examples of the reducing agent include sodium borohydride and lithium borohydride. Examples of the antacid include alkalis such as sodium hydroxide. The addition of such an alkali metal salt is not preferable because the alkali metal also serves as a polymerization catalyst, and if it is excessively added, the polymerization reaction cannot be controlled.

  In order to obtain isosorbide containing no oxidative decomposition product, isosorbide may be distilled as necessary. Moreover, also when the stabilizer is mix | blended in order to prevent the oxidation and decomposition | disassembly of isosorbide, you may distill isosorbide as needed. In this case, the distillation of isosorbide may be simple distillation or continuous distillation, and is not particularly limited. After the atmosphere is an inert gas atmosphere such as argon or nitrogen, distillation is performed under reduced pressure.

By performing such distillation of isosorbide, in the present invention, it is preferable to use high purity isosorbide having a formic acid content of 20 ppm or less, particularly 5 ppm or less.
In addition, the measuring method of the formic acid content in isosorbide is as described later in the section of the examples.

  On the other hand, the alicyclic dihydroxy compound that can be used in the present invention is not particularly limited, but a compound containing a 5-membered ring structure or a 6-membered ring structure is usually used. The 6-membered ring structure may be fixed in a chair shape or a boat shape by a covalent bond. When the alicyclic dihydroxy compound has a 5-membered or 6-membered ring structure, the heat resistance of the obtained polycarbonate can be increased. The number of carbon atoms contained in the alicyclic dihydroxy compound is usually 70 or less, preferably 50 or less, more preferably 30 or less. The higher this value, the higher the heat resistance, but the synthesis becomes difficult, the purification becomes difficult, and the cost is expensive. The smaller the number of carbon atoms, the easier the purification and the easier it is to obtain.

Specific examples of the alicyclic dihydroxy compound containing a 5-membered ring structure or a 6-membered ring structure used in the present invention include alicyclic dihydroxy compounds represented by the following general formula (II) or (III). .
^{_{HOCH 2 -R 1 -CH 2 OH (}} II)
HO—R ² —OH (III)
(In formulas (II) and (III), R ¹ and R ² represent a cycloalkyl group having 4 to 20 carbon atoms or a cycloalkoxyl group having 6 to 20 carbon atoms.)

As cyclohexanedimethanol which is an alicyclic dihydroxy compound represented by the above general formula (II), in general formula (II), R ¹ is represented by the following general formula (IIa) (wherein R ³ is a carbon number of 1 to Which represents 12 alkyl groups). Specific examples thereof include 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, and the like.

As tricyclodecane dimethanol and pentacyclopentadecane dimethanol, which are alicyclic dihydroxy compounds represented by the above general formula (II), in general formula (II), R ¹ is represented by the following general formula (IIb) (in the formula: , N is represented by 0 or 1).

As decalin dimethanol or tricyclotetradecane dimethanol which is an alicyclic dihydroxy compound represented by the above general formula (II), in general formula (II), R ¹ is represented by the following general formula (IIc) (wherein m represents 0 or 1). Specific examples thereof include 2,6-decalin dimethanol, 1,5-decalin dimethanol, 2,3-decalin dimethanol, and the like.

Moreover, as norbornanedimethanol which is an alicyclic dihydroxy compound represented by the above general formula (II), various isomers in which R ¹ is represented by the following general formula (IId) in the general formula (II) Include. Specific examples thereof include 2,3-norbornane dimethanol, 2,5-norbornane dimethanol and the like.

The adamantane dimethanol, which is an alicyclic dihydroxy compound represented by the general formula (II), includes various isomers in which R ¹ is represented by the following general formula (IIe) in the general formula (II). Specific examples of such a material include 1,3-adamantane dimethanol.

Further, cyclohexanediol, which is an alicyclic dihydroxy compound represented by the general formula (III), in general formula (III), ^{R 2} is represented by the following general formula (IIIa) (wherein, ^{R 3} is 1 to carbon atoms And various isomers represented by 12 alkyl groups). Specific examples thereof include 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, 2-methyl-1,4-cyclohexanediol, and the like.

As tricyclodecanediol and pentacyclopentadecanediol, which are alicyclic dihydroxy compounds represented by the above general formula (III), in general formula (III), R ² represents the following general formula (IIIb) (wherein n Is represented by 0 or 1).

As decalin diol or tricyclotetradecane diol which is an alicyclic dihydroxy compound represented by the above general formula (III), in general formula (III), R ² is represented by the following general formula (IIIc) (where m is It represents 0 or 1). Specifically, 2,6-decalindiol, 1,5-decalindiol, 2,3-decalindiol and the like are used as such.

The norbornanediol which is an alicyclic dihydroxy compound represented by the above general formula (III) includes various isomers in which R ² is represented by the following general formula (IIId) in the general formula (III). Specifically, 2,3-norbornanediol, 2,5-norbornanediol, and the like are used as such.

The adamantanediol which is an alicyclic dihydroxy compound represented by the above general formula (III) includes various isomers in which R ² is represented by the following general formula (IIIe) in the general formula (III). Specifically, 1,3-adamantanediol or the like is used as such.

  Among the specific examples of the alicyclic dihydroxy compounds described above, cyclohexane dimethanols, tricyclodecane dimethanols, adamantane diols, and pentacyclopentadecane dimethanols are particularly preferable, and are easily available and easy to handle. From this viewpoint, 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,2-cyclohexanedimethanol, and tricyclodecane dimethanol are preferable.

  In addition, the said exemplary compound is an example of the alicyclic dihydroxy compound which can be used for this invention, Comprising: It is not limited to these at all. These alicyclic diol compounds may be used individually by 1 type, and 2 or more types may be mixed and used for them.

  About the content rate of the structural unit derived from the dihydroxy compound represented by General formula (1) and the structural unit derived from an alicyclic dihydroxy compound in the polycarbonate copolymer of this invention, it can select in arbitrary ratios, Structural unit derived from dihydroxy compound represented by general formula (1): Structural unit derived from alicyclic dihydroxy compound = 1: 99 to 99: 1 (mol%), particularly represented by general formula (1) Structural unit derived from dihydroxy compound: Structural unit derived from alicyclic dihydroxy compound = 10: 90 to 90:10 (mol%) is preferable. If the number of structural units derived from the dihydroxy compound represented by the general formula (1) is larger than the above range and the number of structural units derived from the alicyclic dihydroxy compound is small, coloration tends to occur. When the number of structural units derived from the dihydroxy compound is small and the number of structural units derived from the alicyclic dihydroxy compound is large, the molecular weight tends to be difficult to increase.

  The polycarbonate copolymer of the present invention is derived from a dihydroxy compound other than the dihydroxy compound represented by the general formula (1) and the alicyclic dihydroxy compound (hereinafter sometimes referred to as “other dihydroxy compounds”). In this case, the other dihydroxy compounds include ethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, and 1,3-butanediol. 1,2-butanediol, 1,5-heptanediol, aliphatic dihydroxy compounds such as 1,6-hexanediol, oxyalkylene glycols such as diethylene glycol, triethylene glycol, and tetraethylene glycol, 2,2-bis (4-Hydroxyphenyl) propane [= Bisf Nord A], 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (4-hydroxy-3,5-diethylphenyl) propane, 2,2-bis (4- Hydroxy- (3,5-diphenyl) phenyl) propane, 2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, 2,2-bis (4-hydroxyphenyl) pentane, 2,4′- Dihydroxy-diphenylmethane, bis (4-hydroxyphenyl) methane, bis (4-hydroxy-5-nitrophenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 3,3-bis (4-hydroxyphenyl) Pentane, 1,1-bis (4-hydroxyphenyl) cyclohexane, bis (4-hydroxyphenyl) sulfone, 2,4′-dihydride Xidiphenyl sulfone, bis (4-hydroxyphenyl) sulfide, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxy-3,3′-dichlorodiphenyl ether, 4,4′-dihydroxy-2,5-diethoxydiphenyl ether 9,9-bis (4- (2-hydroxyethoxy) phenyl) fluorene, 9,9-bis (4- (2-hydroxyethoxy-2-methyl) phenyl) fluorene, 9,9-bis (4-hydroxy) 1 type, or 2 or more types, such as aromatic bisphenols, such as a phenyl) fluorene and 9,9-bis (4-hydroxy e-2-methylphenyl) fluorene, are mentioned.

  By using these other dihydroxy compounds, effects such as improvement in flexibility, improvement in heat resistance and improvement in moldability can be obtained, but the content ratio of structural units derived from other dihydroxy compounds is too large. In the polycarbonate copolymer of the present invention, the dihydroxy compound represented by the general formula (1) with respect to all the dihydroxy compounds constituting the polycarbonate copolymer may be deteriorated. The total proportion of the alicyclic dihydroxy compound and the alicyclic dihydroxy compound is preferably 90 mol% or more. Particularly, the polycarbonate copolymer of the present invention is a dihydroxy compound represented by the general formula (1) and the alicyclic dihydroxy. It is preferably composed of only compounds.

  The degree of polymerization of the polycarbonate copolymer of the present invention is such that a mixed solution of phenol and 1,1,2,2, -tetrachloroethane in a weight ratio of 1: 1 is used as a solvent, and the concentration of the polycarbonate copolymer is 1.00 g. As a reduced viscosity (hereinafter simply referred to as “reduced viscosity of polycarbonate copolymer”) measured at a temperature of 20.0 ° C. ± 0.1 ° C., 0.40 dl / g or more, The degree of polymerization is preferably 0.40 dl / g or more and 2.0 dl / g or less. When the reduced viscosity of the polycarbonate copolymer is extremely low, the mechanical strength when molded into a lens or the like is weak. Further, when the reduced viscosity of the polycarbonate copolymer is increased, the fluidity during molding is lowered, the cycle characteristics are lowered, and the birefringence of the molded product tends to be increased. Therefore, the reduced viscosity of the polycarbonate copolymer of the present invention is preferably in the range of 0.40 dl / g to 2.0 dl / g, particularly 0.45 dl / g to 1.5 dl / g.

  The Abbe number of the polycarbonate copolymer of the present invention is preferably 50 or more, particularly preferably 55 or more. The larger this value, the smaller the chromatic dispersion of the refractive index. For example, the chromatic aberration when used with a single lens is reduced, and a clearer image can be easily obtained. As the Abbe number decreases, the chromatic dispersion of the refractive index increases, and when used with a single lens, chromatic aberration increases and the degree of image blur increases.

  Further, the 5% heat loss temperature of the polycarbonate copolymer of the present invention is preferably 340 ° C. or more, particularly preferably 345 ° C. or more. The higher the 5% heat loss temperature, the higher the thermal stability and the higher the heat resistance, and the lower the thermal stability, the lower the thermal stability and the lower the temperature. In addition, the allowable control width at the time of manufacture becomes narrow and difficult to make. In addition, the manufacturing temperature can be increased, and the control range at the time of manufacturing can be widened.

Moreover, it is preferable that the photoelastic coefficient of the polycarbonate copolymer of this invention is 40 * 10 <^-12> Pa < ^{-1 >} or less, More preferably, it is 20 * 10 <^-12> Pa <^-1> or less. When the photoelastic coefficient is high, the retardation value of the film formed by melt extrusion, solution casting method, etc. becomes large. The variation becomes even larger. Moreover, when bonding such a phase difference film, not only the desired phase difference is shifted due to the tension during the bonding, but also the phase difference value is likely to change due to shrinkage of the polarizing plate after the bonding. The smaller the photoelastic coefficient, the smaller the variation in phase difference.

The polycarbonate copolymer of the present invention preferably has an Izod impact strength of 30 J / m ² or more. The greater the Izod impact strength, the higher the strength of the molded body and the less likely it will break.

Further, the polycarbonate copolymer of the present invention has a generated gas amount other than the phenol component per unit area at 110 ° C. (hereinafter sometimes simply referred to as “generated gas amount”) of 5 ng / cm ² or less. In addition, the amount of gas generated from dihydroxy compounds other than the dihydroxy compound represented by the general formula (1) is more preferably 0.5 ng / cm ² or less. The smaller the amount of generated gas, the more the application to the influence of the generated gas, for example, the use of storing electronic parts such as semiconductors, the use of building interior materials, the case of home appliances, and the like can be applied.

  The method for measuring the Abbe number, 5% heat loss temperature, photoelastic coefficient, Izod impact strength, and generated gas amount of the polycarbonate copolymer of the present invention is specifically as shown in the Examples section described later. .

  In addition, the polycarbonate copolymer of the present invention gives a single glass transition temperature when differential scanning calorimetry (DSC) is performed, but the polycarbonate copolymer of the present invention is represented by the general formula (1). By adjusting the types and mixing ratios of the dihydroxy compound and the alicyclic dihydroxy compound, the glass transition temperature is obtained as a polymer having an arbitrary glass transition temperature from about 45 ° C. to about 155 ° C. depending on the application. be able to.

  For example, in film applications that require flexibility, the glass transition temperature of the polycarbonate copolymer is 45 ° C. or higher, for example, 45 to 100 ° C., and in molded products such as bottles and packs that require a certain degree of heat resistance. The glass transition temperature of the polycarbonate copolymer is preferably adjusted to 90 ° C or higher, for example, 90 to 130 ° C. Furthermore, when the glass transition temperature is 120 ° C. or higher, it is suitable for lens applications. That is, it is preferable to have such a glass transition temperature because deformation hardly occurs even under a high temperature and high humidity such as a temperature of 85 ° C. and a relative humidity of 85%, and there is little variation in lens surface accuracy.

  The polycarbonate copolymer of the present invention can be produced by a generally used polymerization method, and the polymerization method may be any of a solution polymerization method using phosgene and a melt polymerization method in which it reacts with a carbonic acid diester. In the presence of a polymerization catalyst, the dihydroxy compound represented by the general formula (1), the alicyclic dihydroxy compound, and other dihydroxy compounds used as necessary are reacted with a carbon dioxide diester having lower toxicity to the environment. A melt polymerization method is preferred.

  Examples of the carbonic acid diester used in the melt polymerization method include those represented by the following general formula (2).

（一般式（２）において、Ａ及びＡ’は、置換基を有していても良い炭素数１〜１８の脂肪族基又は置換基を有していても良い芳香族基であり、Ａ及びＡ’は同一であっても異なっていても良い。）

(In General formula (2), A and A 'are the C1-C18 aliphatic groups which may have a substituent, or the aromatic group which may have a substituent, A and A ′ may be the same or different.)

  Examples of the carbonic acid diester represented by the general formula (2) include diphenyl carbonate, substituted diphenyl carbonate represented by ditolyl carbonate, dimethyl carbonate, diethyl carbonate, and di-t-butyl carbonate. Particularly preferred are diphenyl carbonate and substituted diphenyl carbonate. These carbonic acid diesters may be used alone or in combination of two or more.

  The carbonic acid diester is preferably used in a molar ratio of 0.90 to 1.10, more preferably in a molar ratio of 0.96 to 1.04, with respect to all dihydroxy compounds used in the reaction. When this molar ratio is smaller than 0.90, the terminal OH group of the produced polycarbonate copolymer is increased, and the thermal stability of the polymer is deteriorated or a desired high molecular weight product cannot be obtained. Further, if this molar ratio is greater than 1.10, the rate of transesterification reaction will be reduced under the same conditions, and it will be difficult to produce a polycarbonate copolymer having a desired molecular weight. The amount of residual carbonic acid diester in the polymer is increased, and this residual carbonic acid diester is not preferable because it causes odor of the molded product or the molded product.

  In addition, the usage-amount of the dihydroxy compound represented by General formula (1), an alicyclic dihydroxy compound, and the other dihydroxy compound used as needed is each dihydroxy which comprises the polycarbonate copolymer of this invention. The proportion of the structural unit derived from the compound is as described above.

  Moreover, as a polymerization catalyst (transesterification catalyst) in melt polymerization, an alkali metal compound and / or an alkaline earth metal compound is used. A basic compound such as a basic boron compound, a basic phosphorus compound, a basic ammonium compound, or an amine compound can be used in combination with an alkali metal compound and / or an alkaline earth metal compound. It is particularly preferred to use only metal compounds and / or alkaline earth metal compounds.

  Examples of the alkali metal compound used as the polymerization catalyst include sodium hydroxide, potassium hydroxide, lithium hydroxide, cesium hydroxide, sodium hydrogen carbonate, potassium hydrogen carbonate, lithium hydrogen carbonate, cesium hydrogen carbonate, sodium carbonate, potassium carbonate. , Lithium carbonate, cesium carbonate, sodium acetate, potassium acetate, lithium acetate, cesium acetate, sodium stearate, potassium stearate, lithium stearate, cesium stearate, sodium borohydride, potassium borohydride, lithium borohydride, Cesium borohydride, sodium phenyl borohydride, potassium phenyl borohydride, lithium phenyl borohydride, cesium phenyl borohydride, sodium benzoate, potassium benzoate, lithium benzoate, benzoic acid Cium, 2 sodium hydrogen phosphate, 2 potassium hydrogen phosphate, 2 lithium hydrogen phosphate, 2 cesium hydrogen phosphate, 2 sodium phenyl phosphate, 2 potassium phenyl phosphate, 2 lithium phenyl phosphate, 2 cesium phenyl phosphate, Sodium, potassium, lithium, cesium alcoholate, phenolate, disodium salt of bisphenol A, 2 potassium salt, 2 lithium salt, 2 cesium salt and the like.

Examples of the alkaline earth metal compound include calcium hydroxide, barium hydroxide, magnesium hydroxide, strontium hydroxide, calcium hydrogen carbonate, barium hydrogen carbonate, magnesium hydrogen carbonate, strontium hydrogen carbonate, calcium carbonate, barium carbonate, Examples thereof include magnesium carbonate, strontium carbonate, calcium acetate, barium acetate, magnesium acetate, strontium acetate, calcium stearate, barium stearate, magnesium stearate, and strontium stearate.

  These alkali metal compounds and / or alkaline earth metal compounds may be used alone or in combination of two or more.

  Specific examples of basic boron compounds used in combination with alkali metal compounds and / or alkaline earth metal compounds include tetramethyl boron, tetraethyl boron, tetrapropyl boron, tetrabutyl boron, trimethylethyl boron, trimethylbenzyl boron, trimethyl Sodium salt such as phenyl boron, triethylmethyl boron, triethylbenzyl boron, triethylphenyl boron, tributylbenzyl boron, tributylphenyl boron, tetraphenyl boron, benzyltriphenyl boron, methyltriphenyl boron, butyltriphenyl boron, potassium salt, lithium Examples thereof include salts, calcium salts, barium salts, magnesium salts, and strontium salts.

  Examples of the basic phosphorus compound include triethylphosphine, tri-n-propylphosphine, triisopropylphosphine, tri-n-butylphosphine, triphenylphosphine, tributylphosphine, and quaternary phosphonium salts.

  Examples of the basic ammonium compound include tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, trimethylethylammonium hydroxide, trimethylbenzylammonium hydroxide, trimethylphenylammonium hydroxide, Triethylmethylammonium hydroxide, triethylbenzylammonium hydroxide, triethylphenylammonium hydroxide, tributylbenzylammonium hydroxide, tributylphenylammonium hydroxide, tetraphenylammonium hydroxide, benzyltriphenylammonium hydroxide, methyltriphenylammonium hydroxide Sid, butyl triphenyl ammonium hydroxide, and the like.

  Examples of the amine compound include 4-aminopyridine, 2-aminopyridine, N, N-dimethyl-4-aminopyridine, 4-diethylaminopyridine, 2-hydroxypyridine, 2-methoxypyridine, 4-methoxypyridine, 2 -Dimethylaminoimidazole, 2-methoxyimidazole, imidazole, 2-mercaptoimidazole, 2-methylimidazole, aminoquinoline and the like.

  These basic compounds may be used alone or in combination of two or more.

  When using an alkali metal compound and / or an alkaline earth metal compound, the amount of the polymerization catalyst used is usually in the range of 0.1 to 100 μmol as a metal conversion amount with respect to 1 mol of all dihydroxy compounds used in the reaction. Is preferably used within the range of 0.5 to 50 μmol, and more preferably within the range of 1 to 25 μmol. If the amount of the polymerization catalyst used is too small, the polymerization activity necessary for producing a polycarbonate copolymer having a desired molecular weight cannot be obtained. On the other hand, if the amount of the polymerization catalyst used is too large, the resulting polycarbonate copolymer is obtained. As a result, the production of a polycarbonate copolymer having a target quality becomes difficult.

  In producing such a polycarbonate copolymer of the present invention, the dihydroxy compound represented by the general formula (I) may be supplied as a solid, or may be heated and supplied in a molten state. You may supply as aqueous solution.

On the other hand, the alicyclic dihydroxy compound may be supplied as a solid, heated and supplied in a molten state, or may be supplied as an aqueous solution as long as it is soluble in water.
The same applies to other dihydroxy compounds.

  When these raw material dihydroxy compounds are supplied in a molten state or in an aqueous solution, there is an advantage that they can be easily measured and transported when industrially produced.

  In the present invention, the method of reacting the dihydroxy compound represented by the general formula (I), the alicyclic dihydroxy compound, and other dihydroxy compounds used as necessary with a carbonic acid diester in the presence of a polymerization catalyst, It is performed in a multistage process of two or more stages. Specifically, the first stage reaction is carried out at a temperature of 140 to 220 ° C., preferably 150 to 200 ° C. for 0.1 to 10 hours, preferably 0.5 to 3 hours. From the second stage onward, the reaction temperature is raised while gradually reducing the pressure of the reaction system from the pressure of the first stage, and at the same time, the phenol generated at the same time is removed from the reaction system. Is 200 Pa or less and a polycondensation reaction is performed under the temperature range of 210-280 degreeC.

  In the pressure reduction in this polycondensation reaction, it is important to control the balance between temperature and pressure in the reaction system. In particular, if either one of the temperature and the pressure is changed too quickly, unreacted monomers are distilled out, the molar ratio of the dihydroxy compound and the carbonic acid diester may be changed, and the degree of polymerization may be lowered. For example, when isosorbide and 1,4-cyclohexanedimethanol are used as the dihydroxy compound, 1,4-cyclohexanedimethanol is used when the molar ratio of 1,4-cyclohexanedimethanol to the total dihydroxy compound is 50 mol% or more. Since methanol easily distills out as a monomer, the reaction is carried out under a reduced pressure of about 13 kPa while the temperature is increased at a rate of temperature increase of 40 ° C. or less per hour, and further up to about 6.67 kPa. When the temperature is increased at a temperature increase rate of 40 ° C. or less per hour under the pressure of, and finally the polycondensation reaction is performed at a temperature of 200 to 250 ° C. at a pressure of 200 Pa or less, the degree of polymerization is sufficiently increased. Since the obtained polycarbonate copolymer is obtained, it is preferable.

  In addition, when the molar ratio of 1,4-cyclohexanedimethanol is less than 50 mol% with respect to all dihydroxy compounds, particularly when the molar ratio is 30 mol% or less, 1,4-cyclohexanedimethanol Compared with the case where the molar ratio is 50 mol% or more, the viscosity rises rapidly. For example, the temperature is increased at a rate of 40 ° C. or less per hour until the pressure in the reaction system is reduced to about 13 kPa. And the reaction is carried out at a pressure of up to about 6.67 kPa while increasing the temperature at a rate of temperature rise of 40 ° C. or more, preferably at a rate of temperature rise of 50 ° C. or more per hour. When a polycondensation reaction is finally performed at a temperature of 220 to 290 ° C. under a reduced pressure of 200 Pa or less, a polycarbonate copolymer having a sufficiently increased degree of polymerization is obtained. Arbitrariness.

  The type of reaction may be any of batch type, continuous type, or a combination of batch type and continuous type.

  When the polycarbonate copolymer of the present invention is produced by a melt polymerization method, a phosphoric acid compound, a phosphorous acid compound, or a metal salt thereof can be added during polymerization for the purpose of preventing coloring.

  As the phosphoric acid compound, one or more of trialkyl phosphates such as trimethyl phosphate and triethyl phosphate are preferably used. These are preferably added in an amount of 0.0001 mol% or more and 0.005 mol% or less, more preferably 0.0003 mol% or more and 0.003 mol% or less, based on all dihydroxy compounds used in the reaction. preferable. When the addition amount of the phosphorus compound is less than the above lower limit, the effect of preventing coloring is small, and when it is more than the above upper limit, haze is increased, or on the contrary, the coloring is promoted or the heat resistance is lowered.

  When adding a phosphorous acid compound, the heat stabilizer shown below can be selected arbitrarily and used. In particular, trimethyl phosphite, triethyl phosphite, trisnonylphenyl phosphite, trimethyl phosphate, tris (2,4-di-tert-butylphenyl) phosphite, bis (2,4-di-tert-butylphenyl) One or more of pentaerythritol diphosphites can be suitably used. These phosphorous acid compounds are preferably added in an amount of 0.0001 mol% to 0.005 mol%, more preferably 0.0003 mol% to 0.003 mol%, based on the total dihydroxy compound used in the reaction. It is preferable to add below. If the amount of the phosphite compound is less than the above lower limit, the effect of preventing coloring is small, and if it is more than the above upper limit, it may cause haze to increase, or conversely promote coloring or reduce heat resistance. Sometimes.

  The phosphoric acid compound and the phosphorous acid compound or their metal salts can be added in combination. In this case, the addition amount is the total amount of the phosphoric acid compound and the phosphorous acid compound or their metal salts, as described above. The total content of the dihydroxy compounds is preferably 0.0001 mol% or more and 0.005 mol% or less, and more preferably 0.0003 mol% or more and 0.003 mol% or less. If the amount added is less than the above lower limit, the effect of preventing coloring is small, and if it is more than the above upper limit, haze may be increased, or conversely, coloring may be promoted or heat resistance may be lowered.

  In addition, as a metal salt of a phosphoric acid compound and a phosphorous acid compound, these alkali metal salts and zinc salts are preferable, and zinc salts are particularly preferable. Among these zinc phosphate salts, long-chain alkyl zinc phosphate salts are preferable.

  In addition, the polycarbonate copolymer of the present invention thus produced can be blended with a heat stabilizer in order to prevent a decrease in molecular weight or a deterioration in hue at the time of molding or the like.

  Examples of the heat stabilizer include phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid and esters thereof. Specifically, triphenyl phosphite, tris (nonylphenyl) phosphite, tris (2 , 4-di-tert-butylphenyl) phosphite, tridecyl phosphite, trioctyl phosphite, trioctadecyl phosphite, didecyl monophenyl phosphite, dioctyl monophenyl phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl Phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,2-methylenebis (4,6-di-) tert- Tilphenyl) octyl phosphite, bis (nonylphenyl) pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, tributyl phosphate, triethyl phosphate, Trimethyl phosphate, triphenyl phosphate, diphenyl monoorthoxenyl phosphate, dibutyl phosphate, dioctyl phosphate, diisopropyl phosphate, 4,4′-biphenylenediphosphinic acid tetrakis (2,4-di-tert-butylphenyl), dimethylbenzenephosphonate, Examples include diethyl benzenephosphonate and dipropyl benzenephosphonate. Among them, trisnonylphenyl phosphite, trimethyl phosphate, tris (2,4-di-tert-butylphenyl) phosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2 , 6-Di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite and dimethyl benzenephosphonate are preferably used.

  These heat stabilizers may be used alone or in combination of two or more.

  Such a heat stabilizer can be further added in addition to the addition amount added at the time of melt polymerization. That is, after blending an appropriate amount of a phosphorous acid compound and a phosphoric acid compound to obtain a polycarbonate copolymer, further blending a phosphorous acid compound by a blending method described later, an increase in haze during polymerization, More heat stabilizers can be blended while avoiding coloring and lowering of heat resistance, and hue deterioration can be prevented.

  The amount of these heat stabilizers is preferably 0.0001 to 1 part by weight, more preferably 0.0005 to 0.5 part by weight, and 0.001 to 0, based on 100 parts by weight of the polycarbonate copolymer. More preferred is 2 parts by weight.

  In addition, the polycarbonate copolymer of the present invention can be blended with an antioxidant generally known for the purpose of antioxidant.

  Examples of the antioxidant include pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tetrakis (3-lauryl thiopropionate), glycerol-3-stearyl thiopropionate, triethylene glycol bis [3 -(3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], Pentaerythritol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1, 3,5-trimethyl-2,4 -Tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, N, N-hexamethylenebis (3,5-di-tert-butyl-4-hydroxy-hydrocinnamide), 3,5 -Di-tert-butyl-4-hydroxy-benzylphosphonate-diethyl ester, tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 4,4'-biphenylenediphosphinic acid tetrakis (2,4 -Di-tert-butylphenyl), 3,9-bis {1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl} -2, One type or two or more types such as 4,8,10-tetraoxaspiro (5,5) undecane may be mentioned.

  The blending amount of these antioxidants is preferably 0.0001 to 0.5 parts by weight when the polycarbonate is 100 parts by weight.

  In addition, in the polycarbonate copolymer of the present invention, in order to further improve the releasability from the mold at the time of melt molding, a mold release agent can be blended within a range that does not impair the object of the present invention. .

  Such release agents include higher fatty acid esters of monohydric or polyhydric alcohols, higher fatty acids, paraffin wax, beeswax, olefinic waxes, olefinic waxes containing carboxy groups and / or carboxylic anhydride groups, silicone oils, Examples include organopolysiloxane.

  The higher fatty acid ester is preferably a partial ester or a total ester of a monovalent or polyhydric alcohol having 1 to 20 carbon atoms and a saturated fatty acid having 10 to 30 carbon atoms. Such partial esters or total esters of monohydric or polyhydric alcohols and saturated fatty acids include stearic acid monoglyceride, stearic acid diglyceride, stearic acid triglyceride, stearic acid monosorbite, stearyl stearate, behenic acid monoglyceride, behenyl behenate, Pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythritol tetrapelargonate, propylene glycol monostearate, stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, isopropyl palmitate, biphenyl biphenate Sorbitan monostearate, 2-ethylhexyl stearate and the like.

  Of these, stearic acid monoglyceride, stearic acid triglyceride, pentaerythritol tetrastearate, and behenyl behenate are preferably used.

  As the higher fatty acid, a saturated fatty acid having 10 to 30 carbon atoms is preferable. Such fatty acids include myristic acid, lauric acid, palmitic acid, stearic acid, behenic acid and the like.

  One of these release agents may be used alone, or two or more thereof may be mixed and used.

  The compounding amount of the release agent is preferably 0.01 to 5 parts by weight when the polycarbonate is 100 parts by weight.

  Moreover, the polycarbonate copolymer of this invention can be mix | blended with the light stabilizer in the range which does not impair the objective of this invention.

  Examples of such a light stabilizer include 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole and 2- (3-tert-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzo. Triazole, 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2,2′- Examples include methylene bis (4-cumyl-6-benzotriazolephenyl), 2,2′-p-phenylenebis (1,3-benzoxazin-4-one) and the like.

  These light stabilizers may be used alone or in combination of two or more.

  The blending amount of the light stabilizer is preferably 0.01 to 2 parts by weight when the polycarbonate copolymer is 100 parts by weight.

  In addition, the polycarbonate copolymer of the present invention can be blended with a bluing agent in order to counteract the yellowishness of the lens based on the polymer or ultraviolet absorber. Any bluing agent can be used without any problem as long as it is used for polycarbonate resins and polycarbonate resins. In general, anthraquinone dyes are preferred because they are readily available.

  Specific examples of the bluing agent include the general name Solvent Violet 13 [CA. No (color index No) 60725], generic name Solvent Violet 31 [CA. No 68210, generic name Solvent Violet 33 [CA. No 60725; generic name Solvent Blue 94 [CA. No 61500], generic name Solvent Violet 36 [CA. No. 68210], common name Solvent Blue 97 [manufactured by Bayer "Macrolex Violet RR"] and general name Solvent Blue 45 [CA. No. 61110] is given as a representative example.

  These bluing agents may be used individually by 1 type, and may use 2 or more types together.

These bluing agents are usually blended at a ratio of 0.1 × 10 ⁻⁴ to 2 × 10 ⁻⁴ parts by weight when the polycarbonate copolymer is 100 parts by weight.

  The blending of the polycarbonate copolymer of the present invention and the various additives as described above is, for example, a method of mixing with a tumbler, V-type blender, super mixer, nauter mixer, Banbury mixer, kneading roll, extruder, or the like, or There is a solution blend method in which each of the above components is mixed in a common good solvent such as methylene chloride. However, this is not particularly limited, and any polymer blend method that is usually used can be used. Various methods may be used.

  The polycarbonate copolymer of the present invention thus obtained or a polycarbonate copolymer composition obtained by adding various additives to the polycarbonate copolymer as it is or after being once pelletized by a melt extruder, is then subjected to an injection molding method or extrusion molding. The molded product can be formed by a generally known method such as a method or a compression molding method.

  In order to increase the miscibility of the polycarbonate copolymer of the present invention and obtain stable release properties and physical properties, it is preferable to use a single screw extruder or a twin screw extruder in the melt extrusion. A method using a single screw extruder or a twin screw extruder does not use a solvent or the like, has a small environmental load, and can be preferably used from the viewpoint of productivity.

  Although the melt kneading temperature of the extruder depends on the glass transition temperature of the polycarbonate copolymer of the present invention, when the glass transition temperature of the polycarbonate copolymer of the present invention is lower than 90 ° C., the melt kneading temperature of the extruder is Usually, it is 130 to 250 ° C, preferably 150 to 240 ° C. When the melt kneading temperature is lower than 130 ° C., the melt viscosity of the polycarbonate copolymer is high, the load on the extruder is increased, and the productivity is lowered. When it is higher than 250 ° C., the melt viscosity of the polycarbonate copolymer becomes low, it becomes difficult to obtain pellets, and the productivity is lowered.

  When the glass transition temperature of the polycarbonate copolymer of the present invention is 90 ° C or higher, the melt kneading temperature of the extruder is usually 200 to 300 ° C, preferably 220 ° C to 260 ° C. When the melt kneading temperature is lower than 200 ° C., the melt viscosity of the polycarbonate copolymer is high, the load on the extruder is increased, and the productivity is lowered. When the temperature is higher than 300 ° C., the polycarbonate copolymer is likely to be deteriorated, and the color of the polycarbonate copolymer is yellowed or the molecular weight is decreased, so that the strength is deteriorated.

  When an extruder is used, it is desirable to install a filter in order to prevent the polycarbonate copolymer from being burned and foreign matters mixed during extrusion. The size (opening) of the filter for removing foreign substances depends on the required optical accuracy, but is preferably 100 μm or less. In particular, in the case of dislike mixing foreign substances, it is preferably 40 μm or less, more preferably 10 μm or less.

  The extrusion of the polycarbonate copolymer is desirably performed in a clean room in order to prevent foreign matter from being mixed after the extrusion.

  Moreover, when cooling the extruded polycarbonate copolymer into chips, it is preferable to use a cooling method such as air cooling or water cooling. As the air used for air cooling, it is desirable to use air from which foreign substances in the air have been removed in advance with a hepa filter or the like to prevent reattachment of foreign substances in the air. When water cooling is used, it is desirable to use water from which metal in water has been removed with an ion exchange resin or the like, and foreign matter in water has been removed with a filter. There are various sizes (openings) of filters to be used, but those having a filter of 10 to 0.45 μm are preferable.

  For molding a lens using the polycarbonate copolymer of the present invention, an injection molding machine or an injection compression molding machine is suitable, and mold surface temperature and resin temperature are particularly important as molding conditions at this time. These molding conditions cannot be generally defined by the composition and degree of polymerization of the polycarbonate copolymer, but the mold surface temperature is preferably 30 ° C. or higher and 170 ° C. or lower, and the resin temperature at this time is 220 ° C. or higher and 290 ° C. It is good to be as follows. When the mold surface temperature is 30 ° C. or lower, both the fluidity and transferability of the resin are poor, stress strain remains during injection molding, and the birefringence tends to increase, and the mold temperature is 170. When it is higher than ° C., the transferability is good, but it is easily deformed at the time of release. On the other hand, when the resin temperature is 290 ° C. or higher, the resin is easily decomposed, resulting in a decrease in strength and coloring of the molded product. In addition, the molding cycle is extended, which is not economical.

  When molding optical materials and optical parts from the polycarbonate copolymer of the present invention, starting with a raw material charging step, a polymerization step, a step of extruding the obtained copolymer into a refrigerant to form a pellet or a sheet Then, it is desirable to carry out with care so that dust and the like do not enter. This cleanness is usually class 1000 or less for compact discs and class 100 or less for more advanced information recording.

  Examples of the polycarbonate copolymer of the present invention include aromatic polycarbonate, aromatic polyester, aliphatic polyester, polyamide, polystyrene, polyolefin, acrylic, amorphous polyolefin, ABS, AS, and other synthetic resins, polylactic acid, polybutylene succinate, and the like. It can also be used as a polymer alloy by kneading with one or more of biodegradable resins and rubbers.

EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited by a following example, unless the summary is exceeded.
In the following, the physical properties and characteristics of the polycarbonate copolymer were evaluated by the following methods.

(1) Refractive index and Abbe number An interference filter with wavelengths of 656 nm (C line), 589 nm (D line), 546 nm (e line), and 486 nm (F line) using an Abbe refractometer ("DR-M4" manufactured by Atago Co., Ltd.) Was used to measure the refractive index of each wavelength, nC, nD, ne, and nF.
As a measurement sample, a resin was press-molded at 160 to 200 ° C. to prepare a film having a thickness of 80 μm to 500 μm, and the obtained film was cut into a strip shape having a width of about 8 mm and a length of 10 to 40 mm to obtain a measurement test piece.
The measurement was performed at 20 ° C. using 1-bromonaphthalene as the interfacial liquid.
The Abbe number νd was calculated by the following equation.
νd = (1-nD) / (nC-nF)
The larger the Abbe number, the smaller the wavelength dependency of the refractive index, and the smaller the focal shift due to the wavelength when a single lens is used.

(2) Glass transition temperature (Tig)
Using a differential scanning calorimeter ("DSC822" manufactured by METTLER), about 10 mg of the sample was heated and measured at a heating rate of 10 ° C / min, and the base on the low temperature side was measured according to JIS K 7121 (1987). The extrapolated glass transition start temperature Tig, which is the temperature at the intersection of the straight line obtained by extending the line to the high temperature side and the broken line drawn at the point where the slope of the step change portion of the glass transition is maximized, was obtained. .

(3) Color The chip color was measured using a color meter (“300A” manufactured by Nippon Denshoku).
A predetermined amount of chips were put in a glass cell, measured by reflection measurement, and b value was measured.
The closer this value is to 0, the smaller the yellowness.

(4) Reduced Viscosity Using a Ubbelohde viscometer with a DT-504 automatic viscometer manufactured by Chuo Rika, using a 1: 1 mixed solvent of phenol and 1,1,2,2-tetrachloroethane as a solvent, and a temperature of 20 Measured at 0 ° C. ± 0.1 ° C. The concentration was precisely adjusted to be 1.00 g / dl.
The sample was dissolved in 30 minutes while stirring at 120 ° C., and used for measurement after cooling.
From the passage time t0 of the solvent and the passage time t of the solution, the relative viscosity ηrel is obtained from the following formula,
ηrel = t / t0 (g · cm ⁻¹ · sec ⁻¹ )
From the relative viscosity ηrel, the specific viscosity ηsp was determined from the following formula.
ηsp = (η−η0) / η0 = ηrel−1
The specific viscosity ηsp was divided by the concentration c (g / dl) to obtain a reduced viscosity (converted viscosity) ηred from the following formula.
ηred = ηsp / c
The higher this number, the greater the molecular weight.

(5) 5% heat loss temperature Using “TG-DTA” (SSC-5200, TG / DTA220) manufactured by Seiko Denshi, placing 10 mg of sample on an aluminum container and raising the temperature in a nitrogen atmosphere (nitrogen flow rate 200 ml / min) The temperature was measured from 30 ° C. to 450 ° C. at a rate of 10 ° C./min, and the temperature when the 5% weight decreased was obtained.
The higher this temperature is, the harder it is to decompose.

(6) Izod impact strength Using a custom scientific mini-max injection molding machine “CS-183MMX” at a temperature of 240 to 300 ° C., a length of 31.5 mm, a width of 6.2 mm, and a thickness A test piece having a thickness of 3.2 mm was injection-molded, and a notch having a depth of 1.2 mm was attached by a notching machine to obtain a test piece.
About this test piece, the Izod impact strength with a notch at 23 degreeC was measured using the custom scientific minimax Izod impact tester "CS-183TI type".
The larger this value, the greater the impact strength and the more difficult it is to break.

(7) Tensile test Tensile test pieces with a parallel part length of 9 mm and a parallel part diameter of 1.5 mm were injection-molded at a temperature of 240 ° C to 300 ° C using the above injection molding machine, and a tensile test made by Custom Scientific Co., Ltd. Using a machine “CS-183TE type”, a tensile test was performed under the conditions of a tensile speed of 1 cm / min, and the elongation at yield, tensile yield strength, tensile yield modulus, and elongation at break were measured.
The greater each number, the greater the strength and elongation.

(8) NMR
¹ H-NMR was measured at a resonance frequency of 500 MHz, a flip angle of 45 °, and a measurement temperature of 25 ° C. using “Unity Inova” manufactured by Varian, using deuterated chloroform as a solvent.

(9) Photoelastic coefficient <Sample preparation>
A polycarbonate resin sample (4.0 g), which was vacuum-dried at 80 ° C. for 5 hours, was preheated at a hot press temperature of 200 to 250 ° C. using a spacer having a width of 8 cm, a length of 8 cm, and a thickness of 0.5 mm. After pressurizing for 1 minute under a condition of ˜3 minutes and a pressure of 20 MPa, the entire spacer was taken out and pressure-cooled with a water tube cooling press at a pressure of 20 MPa for 3 minutes to prepare a sheet. A sample was cut out from this sheet to a width of 5 mm and a length of 20 mm.
<Measurement>
It measured using the apparatus which combined the birefringence measuring apparatus which consists of a He-Ne laser, a polarizer, a compensation board, an analyzer, and a photodetector, and a vibration type viscoelasticity measuring apparatus (DVE-3 by Rheology). (For details, see Journal of Japanese Society of Rheology, Vol. 19, p93-97 (1991).)
The sample cut out was fixed to a viscoelasticity measuring device, and the storage elastic modulus E ′ was measured at a frequency of 96 Hz at a room temperature of 25 ° C. At the same time, the emitted laser light is passed through the polarizer, sample, compensator, and analyzer in this order, picked up by a photodetector (photodiode), and passed through a lock-in amplifier with respect to the amplitude and distortion of the waveform of angular frequency ω or 2ω. The phase difference was determined, and the strain optical coefficient O ′ was determined. At this time, the directions of the polarizer and the analyzer were orthogonal to each other, and each was adjusted so as to form an angle of π / 4 with respect to the extending direction of the sample.
The photoelastic coefficient C was obtained from the following equation using the storage elastic modulus E ′ and the strain optical coefficient O ′.
C = O '/ E'

(10) Generated gas <sample preparation>
8 g of a polycarbonate resin sample vacuum-dried at 100 ° C. for 5 hours is heated with a hot press using a spacer having a width of 8 cm, a length of 8 cm, and a thickness of 0.5 mm. After pressurizing for 1 minute under the conditions of 20 minutes and pressure, the entire spacer was taken out and cooled by using a water tube cooling press at a pressure of 20 MPa for 3 minutes to produce a sheet. A sample having a width of 1 cm and a length of 2 cm was cut out from the sheet. The thickness was 1 mm.
<Measurement>
The generated gas was measured by thermal desorption-gas chromatography / mass spectrometry (TDS-GC / MS). As a measuring device, TDS2 manufactured by GERSTEL was used, and the heat desorption temperature was 250 ° C., 10 minutes, and the trap temperature was −130 ° C.
The sample was put in a glass chamber, and gas generated at 110 ° C. for 30 minutes and helium at 60 mL / min was collected by a collection tube Tenax-TA.
Using HP 6890 / 5973N manufactured by Agilent as GC / MS and HP-VOC 0.32 × 60 m 1.8 μmdf as the column, holding at 40 ° C. for 5 minutes, then raising the temperature to 280 ° C. at 8 ° C./minute, then 280 ° C. And measured for 25 minutes. The carrier gas was helium 1.3 mL / min.
The amount of gas generated was determined by a conversion value with toluene as a total amount generated per unit area excluding phenol distilled out during production and benzaldehyde derived from phenol.

(11) Pencil hardness As a measuring device, a surface measuring machine Tripogear type 14DR manufactured by Shinto Kagaku was used and measured under the following conditions in accordance with JIS-K5600.
Load 750g
Measurement speed 30mm / min
Measuring distance 7mm
Mitsubishi pencil UNI was used as the pencil.
As the pencil hardness, 4H, 3H, 2H, H, F, HB, B, 2B, 3B, 4B were used.
The measurement was made 5 times, and the softness of the pencil hardness that was scratched twice or more was defined as the pencil hardness of the measurement substance.

(12) Quantitative determination of formic acid Isosorbide was diluted 100 times with pure water and measured with a DX-500 model manufactured by Dionexy.
The isosorbide used in the reaction is made by Rocket Fleure or Sanko Chemical Co., Ltd., 1,4-cyclohexanedimethanol is produced by Eastman Co., cesium carbonate is produced by Wako Pure Chemical Industries, and diphenyl carbonate is produced by Mitsubishi Chemical Corporation. Tricyclodecane dimethanol is produced by Celanese, pentacyclodecane dimethanol is produced by Celanese, 1,3-adamantanediol is produced by Aldrich, 1,4-butanediol is produced by Mitsubishi Chemical, 1,6-hexane The diol is manufactured by Wako Pure Chemical Industries, and 9,9-bis- (4- (2-hydroxyethoxy) phenyl) fluorene is manufactured by Osaka Gas Chemical Company.

The formic acid content of isosorbide used in Examples 1 to 27 and Comparative Examples 1 and 7 to 10 is 5 ppm, and the distillation method of isosorbide in Examples 28 to 31 is as follows.
<Distillation of isosorbide>
About 1.3 kg of isosorbide was placed in a 2 L flask under an argon stream, a Claisen tube was attached to the flask, and a receiver was attached through a fraction cutter. Heat was kept so that it did not solidify in each part such as piping. After gradually starting to reduce the pressure, the solution was heated and dissolved at an internal temperature of about 100 ° C. Thereafter, distillation started at an internal temperature of 160 ° C. The pressure at this time was 133-266 Pa. After the initial distillation, distillation was performed at an internal temperature of 160 to 170 ° C., a tower top temperature of 150 to 157 ° C., and 133 Pa. After completion of distillation, argon was added to return to normal pressure. The obtained distilled product was cooled and pulverized under an argon stream to obtain distilled and purified isosorbide. This was sealed in an aluminum laminate bag under an argon stream and stored.

Moreover, the symbol of the compound used in description of a following example is as follows.
ISOB: Isosorbide 1,4-CHDM: 1,4-cyclohexanedimethanol TCDDM: Tricyclodecane dimethanol PCPDM: Pentacyclopentadecanedimethanol 1,4-BG: 1,4-butanediol 1,6-HD: 1, 6-hexanediol BHEPF: 9,9-bis- (4- (2-hydroxyethoxy) phenyl) fluorene BCF: 9,9-biscresol fluorene DPC: diphenyl carbonate

[Example 1]
13.0 parts by weight (0.246 moles) of 1,4-cyclohexanedimethanol (hereinafter abbreviated as “1,4-CHDM”) and 27.7 parts by weight of isosorbide (0.516 moles) Carbonate (hereinafter abbreviated as “DPC”) 59.2 parts by weight (0.752 mol) and 2.21 × 10 ⁻⁴ parts by weight (1.84 × 10 ⁻⁶ mol) of cesium carbonate as a catalyst were reacted. In a nitrogen atmosphere, as a first step of the reaction, the heating bath temperature was heated to 150 ° C., and the raw materials were dissolved while stirring as necessary (about 15 minutes).
Subsequently, the pressure was changed from normal pressure to 13.3 kPa, and the generated phenol was extracted out of the reaction vessel while the heating bath temperature was increased to 190 ° C. over 1 hour.

  After maintaining the entire reaction vessel at 190 ° C. for 15 minutes, as a second step, the pressure in the reaction vessel is set to 6.67 kPa, the heating bath temperature is increased to 230 ° C. in 15 minutes, and the generated phenol is removed. It was extracted out of the reaction vessel. Since the stirring torque of the stirrer increased, the temperature was raised to 250 ° C. in 8 minutes, and the pressure in the reaction vessel was allowed to reach 0.200 kPa or less in order to remove the generated phenol. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 1.007 dl / g, a glass transition temperature Tig of 124 ° C., and a color b value of 8.8. These results are shown in Table 1.
Further, this polycarbonate copolymer was molded at 245 ° C. and a mold temperature of 90 ° C., and a test piece having a length of 31.5 mm, a width of 6.2 mm, a thickness of 3.2 mm, a parallel part length of 9 mm, and a parallel part diameter of 1 A tensile test piece of 5 mm was obtained. As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 84 MPa, the tensile yield modulus was 748 MPa, the elongation at yield was 16%, the elongation at break was 30%, and the Izod impact strength was 227 J / m ^2. It was. These results are shown in Table 2.
Further, when this polycarbonate copolymer was pressed at 200 ° C. and formed into a film having a thickness of about 200 μm, the refractive index of d-line was 1.4992, and the Abbe number was 58. These results are shown in Table 3.
The 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 344 ° C. The results are shown in Table 4.
Further, when the amount of generated gas was examined, the amount of generated gas other than the phenol component was 3.7 ng / cm ² , and the generated gas derived from the dihydroxy compound excluding the dihydroxy compound represented by the general formula (1) was not detected. It was. The results are shown in Table 6.
An NMR chart of this polycarbonate copolymer is shown in FIG.

[Example 2]
Isosorbide 31.8 parts by weight (0.458 mol), 1,4-CHDM 8.7 parts by weight (0.127 mol), DPC 59.5 parts by weight (0.583 mol), and cesium carbonate 2.22 × as a catalyst 10 ⁻⁴ parts by weight (1.43 × 10 ⁻⁶ mol) was charged into a reaction vessel, and the heating bath temperature was heated to 150 ° C. as a first step of the reaction under a nitrogen atmosphere. The raw material was dissolved with stirring accordingly (about 15 minutes).
Subsequently, the pressure was changed from normal pressure to 13.3 kPa, and the generated phenol was extracted out of the reaction vessel while the heating bath temperature was increased to 190 ° C. over 1 hour.

  After holding the entire reaction vessel at 190 ° C. for 15 minutes, as the second step, the pressure in the reaction vessel is set to 6.67 kPa, the heating bath temperature is increased to 240 ° C. in 20 minutes, and the generated phenol is removed. It was extracted out of the reaction vessel. Since the stirring torque of the stirrer increased, the pressure in the reaction vessel was allowed to reach 0.200 kPa or less in order to remove further generated phenol. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 0.757 dl / g, a glass transition temperature Tig of 133 ° C., and a color b value of 8.2. These results are shown in Table 1.
Further, when this polycarbonate copolymer was pressed at 200 ° C. and formed into a film having a thickness of about 200 μm, the refractive index of d-line was 1.5004 and the Abbe number was 57. These results are shown in Table 3.
The 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 343 ° C. The results are shown in Table 4.
Moreover, it was 20 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.

[Example 3]
In Example 2, isosorbide 35.9 parts by weight (0.674 mol), 1,4-CHDM 4.4 parts by weight (0.083 mol), DPC 59.7 parts by weight (0.764 mol), carbonic acid as a catalyst. It implemented similarly except having changed to cesium 2.22 * 10 <^-4> weight part (1.87 * 10 <^-6> mol).

The polycarbonate copolymer obtained had a reduced viscosity of 0.712 dl / g, a glass transition temperature Tig of 148 ° C., and a color b value of 9.1. These results are shown in Table 1.
Further, when this polycarbonate copolymer was pressed at 200 ° C. and formed into a film having a thickness of about 200 μm, the refractive index of d-line was 1.5014 and the Abbe number was 57. These results are shown in Table 3.

[Example 4]
In Example 1, 19.7 parts by weight (0.363 mol) of isosorbide, 21.6 parts by weight of 1,4-CHDM (0.404 mol), 58.8 parts by weight of DPC (0.741 mol), and carbonic acid as a catalyst. It implemented similarly except having changed into cesium 2.19 * 10 <^-4> weight part (1.82 * 10 <^-6> mol).

The polycarbonate copolymer obtained had a reduced viscosity of 1.196 dl / g, a glass transition temperature Tig of 101 ° C., and a color b value of 7.7. These results are shown in Table 1.
Further, this polycarbonate copolymer was molded at a temperature of 245 ° C. and a mold temperature of 80 ° C., a test piece having a length of 31.5 mm, a width of 6.2 mm, a thickness of 3.2 mm, a parallel part length of 9 mm, and a parallel part diameter. A 1.5 mm tensile specimen was obtained. As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 66 MPa, the tensile yield modulus was 595 MPa, the elongation at yield was 16%, the elongation at break was 27%, and the Izod impact strength was 293 J / m ^2. It was. These results are shown in Table 2.
Further, when this polycarbonate copolymer was pressed at 200 ° C. and formed into a film having a thickness of about 200 μm, the refractive index of d-line was 1.4993 and the Abbe number was 61. The results are shown in Table 3.
Moreover, the 5% heat loss temperature of this polycarbonate copolymer in nitrogen atmosphere was 345 degreeC. The results are shown in Table 4.

[Example 5]
1,5-CHDM 25.8 parts by weight (0.480 moles), DPC 58.6 parts by weight (0.734 moles), and cesium carbonate as a catalyst with respect to 15.7 parts by weight (0.288 moles) of isosorbide 2.18 × 10 ⁻⁴ parts by weight (1.80 × 10 ⁻⁶ mol) is put into a reaction vessel, and the heating bath temperature is heated to 150 ° C. as a first step of the reaction in a nitrogen atmosphere. Then, if necessary, the raw materials were dissolved with stirring (about 15 minutes).
Next, the pressure is changed from normal pressure to 13.3 kPa, and the generated phenol is withdrawn from the reaction vessel while raising the heating bath temperature to 190 ° C. over 1 hour, and kept at 190 ° C. for 30 minutes. The pressure in the reaction vessel was 6.67 kPa, the heating bath temperature was raised to 240 ° C. in 45 minutes, and the generated phenol was extracted out of the reaction vessel. Although the stirring torque of the stirrer increased, the pressure in the reaction vessel was allowed to reach 0.200 kPa or less in order to remove further generated phenol. After reaching the predetermined stirring torque, the reaction was terminated, and the reaction product was extruded into water to obtain pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 1.186 dl / g, a glass transition temperature Tig of 89 ° C., and a color b value of 5.1. These results are shown in Table 1.
Further, this polycarbonate copolymer was molded at a temperature of 245 ° C. and a mold temperature of 70 ° C., a test piece having a length of 31.5 mm, a width of 6.2 mm and a thickness of 3.2 mm, a parallel part length of 9 mm, and a parallel part diameter. A 1.5 mm tensile specimen was obtained. As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 59 MPa, the tensile yield modulus was 541 MPa, the elongation at yield was 15%, the elongation at break was 70%, and the Izod impact strength was 784 J / m ^2. It was. These results are shown in Table 2.
Further, this polycarbonate copolymer was pressed at 200 ° C. to obtain a film having a thickness of about 200 μm. The refractive index of d-line was 1.4993, and the Abbe number was 62. These results are shown in Table 3.

[Example 6]
In Example 2, 27.7 parts by weight (0.516 mol) of isosorbide, 13.0 parts by weight (0.246 mol) of 1,4-CHDM, 59.2 parts by weight (0.752 mol) of DPC, and carbonic acid as a catalyst. It implemented similarly except having changed to cesium 2.21 * 10 <^-4> weight part (1.84 * 10 <^-6> mol).
The reduced viscosity of the obtained polycarbonate copolymer was 0.979 dl / g, the glass transition temperature Tig was 124 ° C., and the color b value was 9.5. These results are shown in Table 1.
Further, this polycarbonate copolymer was molded at a temperature of 245 ° C. and a mold temperature of 90 ° C., a test piece having a length of 31.5 mm, a width of 6.2 mm, a thickness of 3.2 mm, a parallel part length of 9 mm, and a parallel part diameter. A 1.5 mm tensile specimen was obtained. As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 78 MPa, the tensile yield modulus was 691 MPa, the elongation at yield was 16%, the elongation at break was 47%, and the Izod impact strength was 184 J / m ^2. It was. These results are shown in Table 2.
The pencil hardness was H. The results are shown in Table 7.

[Example 7]
In Example 2, 27.7 parts by weight (0.516 mol) of isosorbide, 13.0 parts by weight (0.246 mol) of 1,4-CHDM, 59.2 parts by weight (0.752 mol) of DPC, It implemented similarly except having changed to 8.7 * 10 <^-5> weight part (5.9 * 10 <^-6> mol) of sodium oxide.
The reduced viscosity of the obtained polycarbonate copolymer was 0.965 dl / g, the glass transition temperature Tig was 123 ° C., and the color b value was 9.4. These results are shown in Table 1.

[Example 8]
In Example 2, isosorbide 28.2 parts by weight (0.516 mol), 1,4-CHDM 13.3 parts by weight (0.246 mol), DPC 58.5 parts by weight (0.730 mol), carbonic acid as a catalyst. It implemented similarly except having changed to cesium 2.25 * 10 <^-4> weight part (1.84 * 10 <^-6> mol).

The polycarbonate copolymer obtained had a reduced viscosity of 0.496 dl / g, a glass transition temperature Tig of 122 ° C., and a color b value of 9.6. These results are shown in Table 1.
The pencil hardness was H. The results are shown in Table 7.

[Example 9]
In Example 2, isosorbide 27.7 parts by weight (0.516 mol), 1,4-CHDM 13.0 parts by weight (0.246 mol), DPC 59.2 parts by weight (0.752 mol), It implemented similarly except having changed to cesium 2.21 * 10 <^-5> weight part (1.84 * 10 <^-7> mol).
The reduced viscosity of the obtained polycarbonate copolymer was 0.910 dl / g, the glass transition temperature Tig was 124 ° C., and the color b value was 9.8. These results are shown in Table 1.

[Example 10]
In Example 2, 27.7 parts by weight (0.516 mol) of isosorbide, 13.0 parts by weight (0.246 mol) of 1,4-CHDM, 59.2 parts by weight (0.752 mol) of DPC, and carbonic acid as a catalyst. It implemented similarly except having changed into cesium 2.21 * 10 < ^-3 > weight part (1.84 * 10 <^-5> mol).
The reduced viscosity of the obtained polycarbonate copolymer was 0.980 dl / g, the glass transition temperature Tig was 124 ° C., and the color b value was 8.3. These results are shown in Table 1.

[Example 11]
In Example 2, the raw material was changed to 27.7 parts by weight (0.516 mol) of isosorbide, 13.0 parts by weight (0.246 mol) of 1,4-CHDM, and 59.2 parts by weight (0.752 mol) of DPC. In addition, 0.096 parts by weight of a heat stabilizer “PEP-36” (manufactured by Asahi Denka, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite) was added to the reaction vessel. The same procedure was performed except that the polymerization was performed.
The polycarbonate copolymer obtained had a reduced viscosity of 0.975 dl / g, a glass transition temperature Tig of 124 ° C., and a color b value of 7.2. These results are shown in Table 1.

[Example 12]
In Example 2, 19.7 parts by weight (0.363 mol) of isosorbide, 21.6 parts by weight of 1,4-CHDM (0.404 mol), 58.8 parts by weight of DPC (0.741 mol), and carbonic acid as a catalyst. Cesium was changed to 2.19 × 10 ⁻⁴ parts by weight (1.82 × 10 ⁻⁶ mol), and together with the raw materials, a heat stabilizer “PEP-36” (Asahi Denka Co., Ltd., bis (2,6-di-tert- (Butyl-4-methylphenyl) pentaerythritol diphosphite) was carried out in the same manner except that 0.096 parts by weight were charged into a reaction vessel and polymerized.
The polycarbonate copolymer obtained had a reduced viscosity of 0.850 dl / g, a glass transition temperature Tig of 100 ° C., and a color b value of 3.6. These results are shown in Table 1.

[Comparative Example 1]
40.1 parts by weight (0.581 moles) of isosorbide is 59.9 parts by weight of DPC (0.592 moles, and cesium carbonate 2.23 × 10 ⁻⁴ parts by weight (1.45 × 10 ⁻⁶ moles) as a catalyst. ) Was added to the reaction vessel and dissolved by heating from room temperature to 150 ° C. with stirring (about 15 minutes).
Next, the pressure was changed from normal pressure to 13.3 kPa, and the generated phenol was extracted out of the system while being increased to 190 ° C. over 1 hour. After maintaining at 190 ° C. for 15 minutes, the pressure in the reactor was set to 6.67 kPa, the heating bath temperature was increased to 230 ° C. in 15 minutes, and the generated phenol was removed. Since the stirring torque increased, the temperature was raised to 250 degrees in 8 minutes, and the degree of vacuum was allowed to reach 0.200 kPa or less in order to remove the generated phenol. After reaching the predetermined stirring torque, the reaction was terminated, and the reaction product was extruded into water to obtain pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 0.679 dl / g, a glass transition temperature of 160 ° C., and a color b value of 13.0. The b value was higher than that of the example and colored brown. It was a thing. These results are shown in Table 1.
Further, this polycarbonate copolymer was molded at 265 ° C., and a test piece having a length of 31.5 mm, a width of 6.2 mm, a thickness of 3.2 mm, a parallel part length of 9 mm, and a parallel part diameter of 1.5 mm was obtained. Although sampling was attempted, the melt viscosity was high, the coloring was intense, the foaming was severe, and the yield of the molded products was poor. As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 105 MPa, the tensile yield modulus was 353 MPa, the elongation at yield was 17%, the elongation at break was 31%, and the Izod impact strength was 11 J / m ² . The Izod impact strength was found to be significantly lower than that of the Examples. These results are shown in Table 2.
Moreover, it turned out that the 5% heat loss temperature in nitrogen atmosphere of this polycarbonate copolymer is 339 degreeC, and is low compared with the thing of an Example. The results are shown in Table 4.
The polycarbonate copolymer was pressed at 200 ° C. to obtain a film having a thickness of about 200 μm. When this film was cut with scissors, it was cracked and fragile.

[Comparative Example 2]
1,4-CHDM 42.3 parts by weight (0.776 mol), DPC 57.7 parts by weight (0.712 mol), and as a catalyst, cesium carbonate 2.15 × 10 ⁻⁴ parts by weight (1.75 × 10 ⁻⁶⁾ Mol) was introduced into a reaction vessel, and as a first step of the reaction under a nitrogen atmosphere, the heating bath temperature was heated to 150 ° C., and the raw materials were dissolved while stirring as necessary (about 15 minutes).
Next, the pressure was reduced from normal pressure to 13.3 kPa over 3 minutes and held. While raising the heating bath temperature to 190 ° C. over 60 minutes, the generated phenol was extracted out of the reaction vessel.
After maintaining the entire reaction vessel at 190 ° C. for 15 minutes, as a second step, the pressure in the reaction vessel is set to 6.67 kPa, the heating bath temperature is increased to 220 ° C. in 45 minutes, and the generated phenol is removed. It was extracted out of the reaction vessel. Although the stirring torque of the stirrer increased, the pressure in the reaction vessel was allowed to reach 0.200 kPa or less in order to remove further generated phenol. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.
The polycarbonate copolymer obtained had a reduced viscosity of 0.662 dl / g, a glass transition temperature of 40 ° C., a color b value of 4.5, and a low glass transition temperature. These results are shown in Table 1.

[Comparative Example 3]
A commercially available aromatic polycarbonate resin “Iupilon H4000” (manufactured by Mitsubishi Engineering Plastics Co., Ltd., reduced viscosity 0.456 dl / g) was molded at 280 ° C., and the test had a length of 31.5 mm, a width of 6.2 mm, and a thickness of 3.2 mm. A tensile test piece having a parallel part length of 9 mm and a parallel part diameter of 1.5 mm was obtained.
As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 63 MPa, the tensile yield modulus was 629 MPa, the elongation at yield was 13%, the elongation at break was 74%, and the Izod impact strength was 6 J / m ^2. It was. These results are shown in Table 2.
Further, this aromatic polycarbonate resin was pressed at 200 ° C. to obtain a film having a thickness of about 200 μm. The refractive index of d-line was 1.5828 and the Abbe number was 30. The results are shown in Table 3.
Moreover, it was 72 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.
The pencil hardness was 2B. The results are shown in Table 7.

[Comparative Example 4]
A commercially available aromatic polycarbonate resin “Iupilon S2000” (manufactured by Mitsubishi Engineering Plastics Co., Ltd., reduced viscosity 0.507 dl / g) was molded at 280 ° C., and the test had a length of 31.5 mm, a width of 6.2 mm, and a thickness of 3.2 mm. A tensile test piece having a parallel part length of 9 mm and a parallel part diameter of 1.5 mm was obtained.
As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 63 MPa, the tensile yield modulus was 565 MPa, the elongation at yield was 13%, the elongation at break was 85%, and the high Izod impact strength was 641 J / m ² . there were. These results are shown in Table 2.

[Comparative Example 5]
It was 320 degreeC when the 5% heat loss temperature in nitrogen atmosphere was measured about commercially available polylactic acid "Lacia H-440" (made by Mitsui Chemicals). The results are shown in Table 4.

[Example 13]
15.8 parts by weight (0.211 moles) of tricyclodecane dimethanol (hereinafter abbreviated as “TCDDM”) and 57.4 parts by weight of DPC (0 parts by weight) with respect to 26.9 parts by weight (0.483 moles) of isosorbide. 709 moles) and 2.14 × 10 ⁻⁴ parts by weight (1.73 × 10 ⁻⁶ moles) of cesium carbonate as a catalyst are placed in a reaction vessel, and the first stage of the reaction is carried out in a nitrogen atmosphere. As a process, the heating bath temperature was heated to 150 ° C., and the raw materials were dissolved while stirring as necessary (about 15 minutes).
Subsequently, the pressure was reduced from normal pressure to 13.3 kPa over 40 minutes, and the generated phenol was extracted out of the reaction vessel while raising the heating bath temperature to 190 ° C. over 40 minutes.

  After maintaining the entire reaction vessel at 190 ° C. for 15 minutes, as the second step, the heating bath temperature was increased to 220 ° C. in 30 minutes. Ten minutes after entering the temperature rise, the pressure in the reaction vessel was reduced to 0.200 kPa or less in 30 minutes, and the generated phenol was distilled off. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 0.640 dl / g, a glass transition temperature Tig of 126 ° C., and a color b value of 4.6. These results are shown in Table 1.
Further, this polycarbonate copolymer was molded at 245 ° C. and a mold temperature of 90 ° C., and a test piece having a length of 31.5 mm, a width of 6.2 mm, a thickness of 3.2 mm, a parallel part length of 9 mm, and a parallel part diameter of 1 A tensile test piece of 5 mm was obtained. As a result of evaluating the mechanical properties using these test pieces, the tensile yield strength was 89 MPa, the tensile yield modulus was 834 MPa, the elongation at yield was 15%, the elongation at break was 76%, and the Izod impact strength was 48 J / m ^2. It was. These results are shown in Table 2.
Further, when this polycarbonate copolymer was pressed at 200 ° C. and formed into a film having a thickness of about 200 μm, the refractive index of d-line was 1.5095 and the Abbe number was 62. These results are shown in Table 3.
Further, the 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 348 ° C. The results are shown in Table 4.
Moreover, it was 9 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.
Further, when the amount of generated gas was examined, the amount of generated gas other than the phenol component was 4.5 ng / cm ² , and the generated gas derived from the dihydroxy compound excluding the dihydroxy compound represented by the general formula (1) was not detected. . The results are shown in Table 6.
The pencil hardness was F. The results are shown in Table 7.

[Example 14]
With respect to 35.5 parts by weight (0.660 mol) of isosorbide, 5.4 parts by weight of TCDDM (0.075 mol), 59.0 parts by weight of DPC (0.748 mol), and cesium carbonate 2.20 × The same operation as in Example 13 except that the amount was changed to 10 ⁻⁴ parts by weight (1.83 × 10 ⁻⁶ mol).

The reduced viscosity of the obtained polycarbonate copolymer was 0.546 dl / g, the glass transition temperature Tig was 144 ° C., and the color b value was 6.4. These results are shown in Table 1.
As a result of evaluating the mechanical properties, the tensile yield strength was 106 MPa, the tensile yield modulus was 872 MPa, the elongation at yield was 16%, the elongation at break was 26%, and the Izod impact strength was 65 J / m ² . These results are shown in Table 2.
Further, when formed into a film, the refractive index of d-line was 1.5052, and the Abbe number was 60. These results are shown in Table 3.

[Example 15]
As for 31.1 parts by weight (0.569 mol) of isosorbide, 10.7 parts by weight (0.145 mol) of TCDDM, 58.2 parts by weight of DPC (0.725 mol), and cesium carbonate 2.17 × The same operation as in Example 13 except that the amount was changed to 10 ⁻⁴ parts by weight (1.78 × 10 ⁻⁶ mol).

The polycarbonate copolymer obtained had a reduced viscosity of 0.644 dl / g, a glass transition temperature Tig of 136 ° C., and a color b value of 2.8. These results are shown in Table 1.
As a result of evaluating the mechanical properties, the tensile yield strength was 107 MPa, the tensile yield modulus was 934 MPa, the elongation at yield was 16%, the elongation at break was 39%, and the Izod impact strength was 58 J / m ² . These results are shown in Table 2.
Further, when formed into a film, the refractive index of d-line was 1.5090, and the Abbe number was 61. These results are shown in Table 3.
The 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 344 ° C. The results are shown in Table 4.

[Example 16]
As the catalyst, 20.7 parts by weight (0.274 moles) of TCDDM, 56.6 parts by weight of DPC (0.684 moles) and 2.11 × cesium carbonate as a catalyst with respect to 22.7 parts by weight (0.403 moles) of isosorbide. The same operation as in Example 13 except that the amount was changed to 10 ⁻⁴ parts by weight (1.68 × 10 ⁻⁶ mol).
The polycarbonate copolymer obtained had a reduced viscosity of 0.637 dl / g, a glass transition temperature Tig of 118 ° C., and a color b value of 2.3. These results are shown in Table 1.
Further, when formed into a film, the refractive index of d-line was 1.5135, and the Abbe number was 58. These results are shown in Table 3.
Moreover, it was 7 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.

[Example 17]
As for 18.7 parts by weight (0.327 moles) of isosorbide, 25.6 parts by weight (0.333 moles) of TCDDM, 55.8 parts by weight of DPC (0.666 moles), and cesium carbonate 2.08 × The same operation as in Example 13 except that the amount was changed to 10 ⁻⁴ parts by weight (1.63 × 10 ⁻⁶ mol).

The reduced viscosity of the obtained polycarbonate copolymer was 0.785 dl / g, the glass transition temperature Tig was 110 ° C., and the color b value was 4.7. These results are shown in Table 1.
As a result of evaluating the mechanical properties, the tensile yield strength was 79 MPa, the tensile yield modulus was 807 MPa, the elongation at yield was 13%, the elongation at break was 18%, and the Izod impact strength was 58 J / m ² . These results are shown in Table 2.
Further, when formed into a film, the d-line had a refractive index of 1.5157 and an Abbe number of 60. These results are shown in Table 3.
Further, the 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 349 ° C. The results are shown in Table 4.

[Example 18]
With respect to 14.7 parts by weight (0.257 moles) of isosorbide, 30.3 parts by weight (0.394 moles) of TCDDM, 55.0 parts by weight of DPC (0.656 moles), and cesium carbonate 2.05 × ^10-4 parts by weight (1.61 × 10 ⁻⁶ mol) as a first step of the reaction under a nitrogen atmosphere, the heating tank temperature is heated to 150 ° C., with stirring as necessary, The raw material was dissolved (about 15 minutes).
Next, the pressure was reduced from normal pressure to 13.3 kPa over 3 minutes, and the generated phenol was extracted out of the reaction vessel while raising the heating bath temperature to 190 ° C. over 60 minutes.

  After holding the entire reaction vessel at 190 ° C. for 15 minutes, as a second step, the pressure in the reaction vessel is set to 6.67 kPa, the heating bath temperature is increased to 240 ° C. in 45 minutes, and the generated phenol is removed. It was extracted out of the reaction vessel. Furthermore, in order to remove the generated phenol, the pressure in the reaction vessel was allowed to reach 0.200 kPa or less. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 0.672 dl / g, a glass transition temperature Tig of 102 ° C., and a color b value of 9.2. These results are shown in Table 1.
As a result of evaluating the mechanical properties, the tensile yield strength was 76 MPa, the tensile yield modulus was 850 MPa, the elongation at yield was 12%, the elongation at break was 31%, and the Izod impact strength was 40 J / m ² . These results are shown in Table 2.
Further, when formed into a film, the refractive index of d-line was 1.5185, and the Abbe number was 58. These results are shown in Table 3.
The 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 352 ° C. The results are shown in Table 4.

[Comparative Example 6]
47.8 parts by weight (0.586 mol) of TCDDM, 58.2 parts by weight (0.585 mol) of DPC, and 1.95 × 10 ⁻⁴ parts by weight (1.44 × 10 ⁻⁶ mol) of cesium carbonate as a catalyst In a nitrogen atmosphere, as a first step of the reaction, the heating bath temperature was heated to 150 ° C., and the raw materials were dissolved while stirring as necessary (about 15 minutes).
Next, while reducing the pressure from normal pressure to 13.3 kPa over 40 minutes, the heating bath temperature was increased to 190 ° C. over 40 minutes. The generated phenol was extracted out of the reaction vessel.
After maintaining the entire reaction vessel at 190 ° C. for 15 minutes, as the second step, the heating bath temperature was increased to 220 ° C. in 30 minutes. Ten minutes after entering the temperature rise, the pressure in the reaction vessel was reduced to 0.200 kPa or less in 30 minutes, and the generated phenol was distilled off. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.
The polycarbonate copolymer obtained had a reduced viscosity of 0.899 dl / g, a glass transition temperature of 73 ° C., and a color b value of 3.9. These results are shown in Table 1.

[Example 19]
With respect to 25.6 parts by weight (0.339 mol) of isosorbide, 19.7 parts by weight (0.145 mol) of pentacyclopentadecanedimethanol (hereinafter abbreviated as “PCPDM”) and 54.7 parts by weight of DPC (0 494 moles) and 2.04 × 10 ⁻⁴ parts by weight (1.21 × 10 ⁻⁶ moles) of cesium carbonate as a catalyst are charged into the reaction vessel, and the first stage of the reaction is carried out in a nitrogen atmosphere. As a process, the heating bath temperature was heated to 150 ° C., and the raw materials were dissolved while stirring as necessary (about 15 minutes).
Subsequently, the pressure was reduced from normal pressure to 13.3 kPa over 40 minutes, and the generated phenol was extracted out of the reaction vessel while raising the heating bath temperature to 220 ° C. over 70 minutes.

  After holding the entire reaction vessel at 220 ° C. for 10 minutes, as the second step, the pressure in the reaction vessel is reduced to 0.200 kPa or less in 30 minutes while raising the heating bath temperature to 240 ° C. in 20 minutes. The generated phenol was distilled off. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

The reduced viscosity of the obtained polycarbonate copolymer was 0.730 dl / g, the glass transition temperature Tig was 149 ° C., and the color b value was 8.4. These results are shown in Table 1.
Further, when this polycarbonate copolymer was pressed at 200 ° C. and formed into a film having a thickness of about 200 μm, the refractive index of d-line was 1.5194 and the Abbe number was 60. These results are shown in Table 3.
The 5% heat loss temperature of this polycarbonate copolymer in a nitrogen atmosphere was 347 ° C. The results are shown in Table 4.
Moreover, it was 8 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.

[Example 20]
With respect to 54.7 parts by weight (0.374 mol) of isosorbide, 31.5 parts by weight (0.161 mol) of adamantane dimethanol, 116.8 parts by weight of DPC (0.545 mol), and cesium carbonate 6 as a catalyst .12 × 10 ⁻⁴ parts by weight (4.84 × 10 ⁻⁶ mol) was charged into the reaction vessel, and the heating bath temperature was heated to 150 ° C. as the first step of the reaction in a nitrogen atmosphere. The raw materials were dissolved with stirring as necessary (about 15 minutes).
Subsequently, the pressure was reduced from normal pressure to 13.3 kPa over 40 minutes, and the generated phenol was extracted out of the reaction vessel while raising the heating bath temperature to 220 ° C. over 70 minutes.

  After holding the entire reaction vessel at 220 ° C. for 10 minutes, as the second step, the pressure in the reaction vessel is reduced to 0.200 kPa or less in 30 minutes while raising the heating bath temperature to 230 ° C. in 20 minutes. The generated phenol was distilled off. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

  The reduced viscosity of the obtained polycarbonate copolymer was 0.409 dl / g, the glass transition temperature Tig was 125 ° C., and the color b value was 14.8. These results are shown in Table 1.

[Example 21]
In Example 20, 31.7 parts by weight (0.160 moles) of biscyclohexanediol, 116.4 parts by weight of DPC (0.543 moles), and catalyst with respect to 54.5 parts by weight (0.373 moles) of isosorbide As cesium carbonate, it implemented by the same method except having changed into 2.04 * 10 <^-4> weight part (1.21 * 10 <^-6> mol).
The reduced viscosity of the obtained polycarbonate copolymer was 0.260 dl / g, the glass transition temperature Tig was 125 ° C., and the color b value was 8.6. These results are shown in Table 1.

[Example 22]
For 11.7 parts by weight (0.165 moles) of isosorbide, 30.0 parts by weight (0.428 moles) of 1,4-CHDM, 58.3 parts by weight of DPC (0.561 moles), and cesium carbonate as a catalyst 2.18 × 10 ⁻⁴ parts by weight (1.38 × 10 ⁻⁶ mol) is put into a reaction vessel, and the heating bath temperature is heated to 150 ° C. as a first step of the reaction in a nitrogen atmosphere. Then, if necessary, the raw materials were dissolved with stirring (about 15 minutes).
Next, the pressure is changed from normal pressure to 13.3 kPa, and the generated phenol is extracted out of the system while raising the heating bath temperature to 190 ° C. over 1 hour, and maintained at 190 ° C. for 30 minutes. The pressure in the reaction vessel was 6.67 kPa, the heating bath temperature was increased to 220 ° C. in 45 minutes, and the generated phenol was extracted. Although the stirring torque increased, the pressure in the reaction vessel was allowed to reach 0.200 kPa or less in order to remove further generated phenol. After reaching the predetermined stirring torque, the reaction was terminated, and the reaction product was extruded into water to obtain pellets.

The reduced viscosity of the obtained polycarbonate copolymer was 0.979 dl / g, the glass transition temperature was 74 ° C., and the color b value was 4.7. These results are shown in Table 1.
Furthermore, this polycarbonate copolymer was pressed at 200 ° C. to obtain a film having a thickness of about 200 μm. The refractive index of d-line was 1.5002 and Abbe number was 56. These results are shown in Table 3.

[Example 23]
In Example 22, 7.8 parts by weight (0.142 moles) of isosorbide, 34.1 parts by weight (0.631 moles) of 1,4-CHDM, 58.1 parts by weight (0.723 moles) of DPC, and carbonic acid as a catalyst. It implemented similarly except having changed into cesium 2.17 * 10 <^-4> weight part (1.77 * 10 <^-6> mol).
The polycarbonate copolymer obtained had a reduced viscosity of 1.159 dl / g, a glass transition temperature Tig of 63 ° C., and a color b value of 2.9. These results are shown in Table 1.
Furthermore, this polycarbonate copolymer was pressed at 200 ° C. to obtain a film having a thickness of about 200 μm. The refractive index of d-line was 1.5024, and the Abbe number was 56. These results are shown in Table 3.

[Example 24]
In Example 22, 3.9 parts by weight (0.070 mol) of isosorbide, 38.2 parts by weight of 1,4-CHDM (0.703 mol), 57.9 parts by weight of DPC (0.717 mol), and carbonic acid as a catalyst. It implemented similarly except having changed into cesium 2.16 * 10 <^-4> weight part (1.76 * 10 <^-6> mol).
The reduced viscosity of the obtained polycarbonate copolymer was 0.670 dl / g, the glass transition temperature Tig was 51 ° C., and the color b value was 2.8. These results are shown in Table 1.

[Example 25]
In Example 22, 1.9 parts by weight (0.035 mol) of isosorbide, 40.3 parts by weight (0.740 mol) of 1,4-CHDM, 57.8 parts by weight (0.715 mol) of DPC, and carbonic acid as a catalyst. It implemented similarly except having changed into 2.15 * 10 <^-4> weight part (1.75 * 10 <^-6> mol) of cesium.
The polycarbonate copolymer obtained had a reduced viscosity of 0.640 dl / g, a glass transition temperature Tig of 45 ° C., and a color b value of 3.0. These results are shown in Table 1.

[Comparative Example 7]
In Example 13, 85.61 parts by weight (0.585 mol) of isosorbide, 22.6 parts by weight (0.251 mol) of 1,4-butanediol (hereinafter abbreviated as “1,4-BG”), The same procedure was carried out except that 166.8 parts by weight of DPC (0.779 mol) and the catalyst were changed to 1.08 × 10 ⁻⁴ parts by weight (0.87 × 10 ⁻⁶ mol) of cesium carbonate.
The reduced viscosity of the obtained polycarbonate copolymer was 0.568 dl / g, the glass transition temperature was 116 ° C., and the color b value was 12.4. These results are shown in Table 1.
Moreover, it was 23 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.
Further, when the amount of generated gas was examined, the amount of generated gas other than the phenol component was 10.0 ng / cm ² , and tetrahydrofuran (THF) was used as the generated gas derived from the dihydroxy compound excluding the dihydroxy compound represented by the general formula (1). ) Was detected at 2.0 ng / cm ² . The results are shown in Table 6.

[Comparative Example 8]
In Example 13, isosorbide 81.22 (0.556 mol), 1,6-hexanediol (hereinafter abbreviated as “1,6-HD”) 28.2 parts by weight (0.239 mol), DPC161. The same procedure was carried out except that 6 parts by weight (0.754 mol) and the catalyst were changed to 1.08 × 10 ⁻⁴ parts by weight (0.87 × 10 ⁻⁶ mol) of cesium carbonate.
The polycarbonate copolymer obtained had a reduced viscosity of 1.063 dl / g, a glass transition temperature of 85 ° C., and a color b value of 8.9. These results are shown in Table 1.
Moreover, it was 20 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.
Further, when the amount of generated gas was examined, the amount of generated gas other than the phenol component was 11.0 ng / cm ² , and as the generated gas derived from the dihydroxy compound excluding the dihydroxy compound represented by the general formula (1), cyclohexadiene, Cyclohexyl phenyl ether was detected at 5.6 ng / cm ² . The results are shown in Table 6.
The pencil hardness was HB. The results are shown in Table 7.

[Comparative Example 9]
In Example 7, isosorbide 42.6 (0.292 mol), TCDDM 25.6 parts by weight (0.130 mol), 9,9-bis- (4- (2-hydroxyethoxy) phenyl) fluorene (hereinafter referred to as BHEPF) (Abbreviated) 46.7 parts by weight (0.106 mol) DPC 127.6 parts by weight (0.596 mol), and 8.7 × 10 ⁻⁵ parts by weight of sodium hydroxide (5.9 × 10 ⁻⁶ mol) as a catalyst It implemented similarly except having changed to.
The reduced viscosity of the obtained polycarbonate copolymer was 0.659 dl / g, the glass transition temperature was 121 ° C., and the color b value was 9.2. These results are shown in Table 1.
Further, this polycarbonate copolymer was pressed at 200 ° C. to obtain a film having a thickness of 200 μm. The refractive index of d-line was 1.5410, and the Abbe number was 42. These results are shown in Table 3.

[Comparative Example 10]
In Example 13, isosorbide 63.84 (0.437 mol), 9,9-biscresol fluorene (hereinafter abbreviated as BCF) 27.6 parts by weight (0.0729 mol), 1,4-butanediol 19.7 It implemented similarly except having changed into 1.08 * 10 <^-4> weight part (0.87 * 10 < ^-6 > mol) of cesium carbonate as a weight part (0.219 mol) and a catalyst.
The reduced viscosity of the obtained polycarbonate copolymer was 0.464 dl / g, the glass transition temperature was 129 ° C., and the color b value was 8.3. These results are shown in Table 1.
Moreover, it was 23 * 10 <^-12> Pa < ^{-1 >} when the photoelastic coefficient was measured. The results are shown in Table 5 together with the glass transition temperature value.

[Example 26]
As for 26.8 parts by weight (18.70 moles) of isosorbide, 15.4 parts by weight (8.02 moles) of TCDDM, 57.7 parts by weight of DPC (26.72 moles), and cesium carbonate 2.14 × 10 ⁻⁴ parts by weight (6.68 × 10 ⁻⁵ mol) is charged into a reaction vessel, and the heating tank temperature is heated to 150 ° C. as a first step of the reaction under a nitrogen atmosphere. The raw materials were dissolved with stirring accordingly (about 60 minutes).
Subsequently, the pressure was reduced from normal pressure to 13.3 kPa over 40 minutes, and the generated phenol was extracted out of the reaction vessel while raising the heating bath temperature to 190 ° C. over 40 minutes.

  After maintaining the entire reaction vessel at 190 ° C. for 15 minutes, as the second step, the heating bath temperature was increased to 220 ° C. in 30 minutes. Ten minutes after reaching 220 ° C., the pressure in the reaction vessel was reduced to 0.200 kPa or less in 30 minutes, and the generated phenol was distilled off. After reaching a predetermined stirring torque, the reaction was terminated, and the produced reaction product was extruded into water to obtain polycarbonate copolymer pellets.

The polycarbonate copolymer obtained had a reduced viscosity of 0.506 dl / g, a glass transition temperature Tig of 126 ° C., and a color b value of 10.0. These results are shown in Table 8.
Moreover, the NMR chart of this polycarbonate copolymer is shown in FIG.

[Example 27]
12.7 parts by weight (9.47 moles) of CHDM, 60.4 parts by weight of DPC (30.39 moles) and 21.5 parts by weight of cesium carbonate as a catalyst with respect to 26.9 parts by weight (19.88 moles) of isosorbide The same operation as in Example 26 was carried out except for 10 ⁻⁴ parts by weight (7.10 × 10 ⁻⁵ mol). The reduced viscosity of the obtained polycarbonate copolymer was 0.621 dl / g, the glass transition temperature Tig was 123 ° C., and the color b value was 11.0. These results are shown in Table 8.

[Examples 28 to 29]
In Example 13, it carried out similarly except having previously distilled isosorbide and using isosorbide whose formic acid content became the quantity shown in Table 8.
Table 8 shows the measurement results of the reduced viscosity, glass transition temperature, and color b value of the obtained polycarbonate copolymer.

[Examples 30 to 31]
In Example 2, it was carried out in the same manner except that isosorbide was distilled in advance, and isosorbide having a formic acid content shown in Table 8 was used.
Table 8 shows the measurement results of the reduced viscosity, glass transition temperature, and color b value of the obtained polycarbonate copolymer.

[Reference Examples 1-3]
In Example 13, it was carried out in the same manner except that isosorbide was not distilled in advance, but isosorbide having a formic acid content shown in Table 8 was used.
Although phenol was distilled off, the reaction solution was gradually colored, no increase in torque was observed, and no polymer was obtained.

[Reference Example 4]
In Example 2, the same procedure was carried out except that isosorbide was not distilled in advance, but isosorbide having a formic acid content shown in Table 8 was used.
Although phenol was distilled off, the reaction solution was gradually colored, no increase in torque was observed, and no polymer was obtained.

From Table 2, it can be seen that the polycarbonate copolymer of the present invention exhibits a tensile yield strength, tensile yield modulus, and elongation at yield that are equal to or higher than those of commercially available polycarbonates, and has a high Izod impact strength.
From Table 3, it can be seen that the polycarbonate copolymer of the present invention has a smaller refractive index and a larger Abbe number than commercially available polycarbonates and conventional polycarbonates.
From Table 4, it can be seen that the polycarbonate copolymer of the present invention has higher thermal stability than commercially available polylactic acid and conventional polycarbonate.
From the above results, the polycarbonate copolymer of the present invention has excellent mechanical strength, good heat resistance, low refractive index, large Abbe number, excellent transparency, and can be used for optical materials and various molding materials. It turns out that it can use suitably.
It can be seen from Table 5 that the polycarbonate copolymer of the present invention has a small photoelastic coefficient and can be suitably used for optical materials such as films and lenses.
From Table 6, it can be seen that the polycarbonate of the present invention copolymerized with an alicyclic dihydroxy compound generates less gas than the polycarbonate copolymerized with an aliphatic diol. That is, when an aliphatic diol such as 1,4-butanediol or 1,6-hexanediol is used as the dihydroxy compound, gas such as cyclic ether derived from these diols is generated. When an alicyclic diol such as dimethanol or tricyclodecane dimethanol is used, there is almost no such generated gas. Therefore, it turns out that an alicyclic diol containing polycarbonate has little influence on an environment, when used for household appliances, such as an optical film.
From Table 7, it can be seen that the polycarbonate copolymer of the present invention has a high pencil hardness, a high surface hardness, and can be suitably used for a film application or a structural material application such as a housing that does not hurt the surface.
From Table 8, it can be seen that a polycarbonate copolymer with less coloring can be obtained by using isosorbide from which formic acid has been removed by distillation or the like.

  The polycarbonate copolymer of the present invention is a film that requires flexibility, a sheet field, a bottle that requires heat resistance, a container field, various structural materials that require impact strength, a camera lens, a finder lens, and a CCD. Films such as lenses for CMOS and CMOS, retardation films used for liquid crystals and plasma displays, diffusion sheets, polarizing films, films, sheets, optical disks, films, sheets, optical materials, optical components, dyes and charge transfer agents It is suitable for use in applications such as a binder that immobilizes etc.

1 is a diagram showing an NMR chart of a polycarbonate copolymer produced in Example 1. FIG. FIG. 2 is an NMR chart of the polycarbonate copolymer produced in Example 26.

Claims (13)

A polycarbonate copolymer comprising a structural unit derived from a dihydroxy compound represented by the following general formula (1) and a structural unit derived from an alicyclic dihydroxy compound, having an Abbe number of 50 or more and 5% A polycarbonate copolymer having a heat loss temperature of 340 ° C. or higher.

A polycarbonate copolymer comprising a structural unit derived from a dihydroxy compound represented by the following general formula (1) and a structural unit derived from an alicyclic dihydroxy compound, and comprising all the dihydroxy compounds constituting the copolymer The ratio of the dihydroxy compound represented by following General formula (1) and an alicyclic dihydroxy compound is 90 mol% or more, The polycarbonate copolymer characterized by the above-mentioned.

  2. The polycarbonate copolymer according to claim 1, wherein the ratio of the dihydroxy compound represented by the general formula (1) and the alicyclic dihydroxy compound to the total dihydroxy compound constituting the polycarbonate copolymer is 90 mol% or more. The polycarbonate copolymer according to any one of claims 1 to 3, wherein the alicyclic dihydroxy compound includes a 5-membered ring structure or a 6-membered ring structure.   The polycarbonate copolymer according to claim 4, wherein the alicyclic dihydroxy compound contains 30 or less carbon atoms.   6. The alicyclic dihydroxy compound is at least one compound selected from the group consisting of cyclohexane dimethanol, tricyclodecane dimethanol, adamantane diol, and pentacyclopentadecane dimethanol. Polycarbonate copolymer. The polycarbonate copolymer according to any one of claims 1 to 6, wherein the photoelastic coefficient is 20 x 10 ^-12 Pa ^-1 or less. The polycarbonate copolymer according to any one of claims 1 to 7, wherein the Izod impact strength is 30 J / m ² or more. The polycarbonate copolymer according to any one of claims 1 to 8, wherein a generated gas amount other than a phenol component per unit area at 110 ° C is 5 ng / cm ² or less.   The constitutional unit derived from the dihydroxy compound represented by the general formula (1) includes a constitutional unit derived from at least one selected from the group consisting of isosorbide, isomannide, and isoidet. 10. The polycarbonate copolymer according to any one of 9 above.   A reduced viscosity at a concentration of 1.00 g / dl at 20 ° C. ± 0.1 ° C. in a 1: 1 weight ratio solution of phenol and 1,1,2,2-tetrachloroethane is 0.40 dl / g or more. The polycarbonate copolymer according to any one of claims 1 to 10. The polycarbonate according to any one of claims 1 to 11, wherein a dihydroxy compound represented by the following general formula (1) and an alicyclic dihydroxy compound are reacted with a carbonic acid diester in the presence of a polymerization catalyst. A method for producing a copolymer.

  The method for producing a polycarbonate copolymer according to claim 12, wherein an alkali metal compound and / or an alkaline earth metal compound is used as the polymerization catalyst.

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