JP2003020393A - Polycarbonate resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polycarbonate resin composition efficiently absorbing an ultraviolet ray of not longer than a specific wavelength, reducing coloration at extrusion and molding and excellent in color tone. SOLUTION: The polycarbonate resin composition comprises 0.001-3.0 pt.wt. benzotriazole ultraviolet absorbent having a purity of not less than 98% to 100 pt.wt. of a polycarbonate resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polycarbonate resin composition used for optical applications such as sheets and lenses, which has a low ultraviolet transmittance and a good color tone.

[0002]

2. Description of the Related Art Polycarbonate resins are used as optical materials for various lenses, prisms, optical disk substrates, etc. because they are excellent in mechanical properties such as impact resistance, heat resistance, and transparency. . Due to its excellent transparency and impact resistance, it is used for eyeglass lenses and the like. However, in order to protect the eyes from ultraviolet rays, it is important not to transmit ultraviolet rays having a specific wavelength or less, and polycarbonate resins mixed with ultraviolet absorbers are used. Japanese Patent Application Laid-Open No. 9-291205 discloses a means for adding an ultraviolet absorber having a specific structure having two benzotriazolylphenol groups in the molecule. But,
The one to which the general commercially available ultraviolet absorber is added is
Discoloration during injection molding is large, and it is necessary to add a large amount of bluing agent in order to eliminate the yellow tint for eyeglass lenses. Therefore, there is a drawback that the molded product has a dull feeling and low luminous transmittance.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a polycarbonate resin composition which efficiently absorbs ultraviolet rays having a specific wavelength or less, reduces coloring during extrusion and molding, and has an excellent color tone. .

[0004]

DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted extensive studies as to a method for overcoming the above-mentioned drawbacks, and as a result, 100 parts by weight of a polycarbonate resin has the following structural formula (1) having a purity of 98% or more. A polycarbonate resin composition containing 0.001 to 3.0 parts by weight of a benzotriazole-based ultraviolet absorber having a) efficiently absorbs ultraviolet rays having a specific wavelength or less, and reduces coloring during extrusion and molding, It has been found that a polycarbonate resin composition having an excellent color tone is provided. Hereinafter, the resin composition of the present invention will be described in more detail.

[Chemical 2] (In the above formula (1), R ₁ and R ₂ are a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a hydroxyalkyl group or a phenyl group,
R ₁ and R ₂ may be the same or different. Moreover, m and n represent the number of substituents and are integers of 0-4. R ₃ is a direct bond, an alkylidene group, an aryl-substituted alkylene group,
Arylene group, -O-, -S-, -CO-, -SO 2 - or -R ₄ -
_{X-R 5 -Y-R 6} - (R 4, R 5, R 6 is a direct bond, alkylidene group, aryl-substituted alkylene group, an arylene group, X, Y represents a direct bond or an ester bond, at least one Represents an ester bond). )

The aromatic polycarbonate resin and aromatic-aliphatic copolymer polycarbonate resin used in the present invention can be used. The aromatic polycarbonate resin can be synthesized by a known method such as a phosgene method or a transesterification method. The aromatic-aliphatic copolymer polycarbonate resin can be synthesized by a known method such as a transesterification method.

Examples of aromatic dihydroxy compounds are 2,2-bis (4-hydroxyphenyl) propane (= bisphenol A) and 2,2-bis (3,5-dibromo-4-hydroxyphenyl) propane (= Tetrabromobisphenol A), bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl)
Ethane, 2,2-bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) octane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 1,1-bis (3-t-butyl-4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2
-Bis (3-bromo-4-hydroxyphenyl) propane, 2,2-bis (3,5-dichloro-4-hydroxyphenyl) propane, 2,2-bis (3-phenyl-4)
-Hydroxyphenyl) propane, 2,2-bis (3-
Cyclohexyl-4-hydroxyphenyl) propane,
Bis (hydroxyaryl) alkanes exemplified by 1,1-bis (4-hydroxyphenyl) -1-phenylethane, bis (4-hydroxyphenyl) diphenylmethane and the like; 1,1-bis (4-hydroxyphenyl) cyclo Pentane, 1,1-bis (4-hydroxyphenyl)
Bis (hydroxyaryl) cycloalkanes exemplified by cyclohexane, 1,1, -bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and the like; 4,4′-dihydroxydiphenyl ether, 4,
Dihydroxy diaryl ethers exemplified by 4'-dihydroxy-3,3'-dimethyldiphenyl ether and the like; 4,4'-dihydroxydiphenyl sulfide,
Dihydroxydiaryl sulfides exemplified by 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfide and the like; 4,4′-dihydroxydiphenyl sulfoxide, 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfoxide and the like Dihydroxy diaryl sulfoxides; 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone and the like dihydroxy diaryl sulfones; hydroquinone, resorcin, 4,
4'-dihydroxydiphenyl and the like are mentioned, and particularly preferable are 2,2-bis (4-hydroxyphenyl) propane and 1,1-bis (4-hydroxyphenyl) cyclohexane. The aromatic dihydroxy compounds may be used alone or in combination of two or more.

As the aliphatic dihydroxy compound used in the aromatic-aliphatic copolymer polycarbonate resin, an aliphatic dihydroxy compound containing an alicyclic structure is preferably used. Specifically, tricyclo (5.2.1.0 ^2.6 ) decandimethanol, β, β, β ', β'-tetramethyl-
2,4,8,10-Tetraoxaspiro [5,5] undecane-3,9-diethanol, 1,4-cyclohexanedimethanol, 2,6-decalindimethanol and the like can be mentioned. These aliphatic dihydroxy compounds may be used alone or in combination of two or more.

The ratio of the aromatic dihydroxy compound to the aliphatic dihydroxy compound is preferably 95/5 to 5/95 (molar ratio) from the balance of optical characteristics, heat resistance and the like. It is more preferably 90/10 to 10/90 (molar ratio).

Polycarbonate resins branched by a branching agent can also be used. Examples of the branching agent include phloroglysin, 2,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) -3-heptene, 4,6.
-Dimethyl-2,4,6-tri (4-hydroxyphenyl) -2-heptene, 1,3,5-tri (2-hydroxyphenyl) benzol, 1,1,1-tri (4-hydroxyphenyl) ethane , 2,6-bis (2-hydroxy-5-methylbenzyl) -4-methylphenol,
α, α ', α "-tri (4-hydroxyphenyl) -1,
Polyhydroxy compounds exemplified by 3,5-triisopropylbenzene and the like, or 3,3-bis (4-hydroxyaryl) oxindole (= isatin bisphenol), 5-chloroisatin bisphenol, 5,7
-Dichloroisatin bisphenol, 5-bromoisatin bisphenol and the like are preferably used. A branched polycarbonate resin can be produced by the phosgene method or the transesterification method in the presence of these branching agents.

In the case of the phosgene-processed polycarbonate, an end stopper or a molecular weight modifier may be used. Examples of the terminal terminator or the molecular weight modifier include compounds having a monovalent phenolic hydroxyl group, such as phenol, pt-butylphenol, pt-octylphenol, 4-
In addition to (1-methyl-1-phenylethyl) phenol, tribromophenol, etc., long-chain alkylphenol,
Aliphatic carboxylic acid chloride, aliphatic carboxylic acid, aromatic carboxylic acid, hydroxybenzoic acid alkyl ester,
Examples include alkyl ether phenols. The end terminator or the molecular weight modifier may be used alone or in combination of two or more.

Carbonic acid diesters are used in the production of polycarbonate resins by the transesterification method. Examples of the carbonic acid diester include diphenyl carbonate, ditolyl carbonate, bis (chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate and the like. Among these, diphenyl carbonate is particularly preferable. The chlorine content in diphenyl carbonate, which also causes coloring, is preferably 20 ppm or less. More preferably, it is 10 ppm or less. Diphenyl carbonate is 0.9 per 1 mol of the total amount of the aromatic dihydroxy compound and the aliphatic dihydroxy compound.
It is preferably used in an amount of 7 to 1.2 mol, particularly preferably an amount of 0.99 to 1.10 mol.

In the production of a polycarbonate resin by the transesterification method, a known catalyst is appropriately used. For example, basic compounds, transesterification catalysts, and the like can be used, and particularly alkali metals and / or alkaline earth compounds, nitrogen-containing compounds, metal compounds such as tin, and the like are preferably used.

In the production of a polycarbonate resin by the transesterification method, it is preferable to remove or deactivate the catalyst in order to maintain the thermal stability and the hydrolysis stability of the polycarbonate, which is the product at the end of the polymerization. The method of deactivating the transesterification catalyst such as alkali metal or alkaline earth metal by adding the acidic substance is preferably carried out.

The weight average molecular weight of the polycarbonate resin used in the present invention is preferably 30,000 to 200,000, and more preferably 40,000 to 1.
It is 20,000.

The benzotriazole type ultraviolet absorber used in the present invention has a structure of the following formula (1).

[Chemical 3] (In the above formula (1), R ₁ and R ₂ are a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a hydroxyalkyl group or a phenyl group,
R ₁ and R ₂ may be the same or different. Moreover, m and n represent the number of substituents and are integers of 0-4. R ₃ is a direct bond, an alkylidene group, an aryl-substituted alkylene group,
Arylene group, -O-, -S-, -CO-, -SO 2 - or -R ₄ -
_{X-R 5 -Y-R 6} - (R 4, R 5, R 6 is a direct bond, alkylidene group, aryl-substituted alkylene group, an arylene group, X, Y represents a direct bond or an ester bond, at least one Represents an ester bond). )

The above UV absorber is specifically bis (3- (2H-benzotriazol-2-yl) -2-
Hydroxy-5-methylphenyl) methane, bis (3-
(2H-benzotriazol-2-yl) -2-hydroxy-5- (1,1,3,3-tetramethylbutyl) phenyl) methane, bis (3- (2H-benzotriazol-2-yl) -2 -Hydroxy-5-cumylphenyl) methane, bis (3- (2H-benzotriazole-
2-yl) -2-hydroxy-5-octylphenyl)
Methane, 1,1-bis (3- (2H-benzotriazol-2-yl) -2-hydroxy-5-methylphenyl) octane, 1,1-bis (3- (2H-5-chlorobenzotriazole-2 -Yl) -2-hydroxy-5
-Methylphenyl) octane, 1,2-ethanediyl
Bis (3- (2H-benzotriazol-2-yl)-
2-hydroxybenzoate), 1,12-dodecanediyl bis (3- (2H-benzotriazole-2-
Yl) -4-hydroxybenzoate), 1,3-cyclohexanediyl bis (3- (5-chloro-2H-
Benzotriazol-2-yl) -2-hydroxybenzoate), 1,4-butanediyl bis (3- (2
H-benzotriazol-2-yl) -4-hydroxy-5-methylphenylethanoate), 3,6-dioxa-1,8-octanediyl bis (3- (5-methoxy-2H-benzotriazole-2- Yl) -4-hydroxyphenylethanoate), 1,6-hexanediyl bis (3- (3- (2H-benzotriazol-2-yl) -4-hydroxy-5-t-butylphenyl) propionate), p -Xylene diyl bis (3
-(3- (2H-benzotriazol-2-yl) -4
-Hydroxyphenyl) propionate), bis (3
-(2H-benzotriazol-2-yl) -4-hydroxytoluyl) malonate, bis (2- (3- (2
H-benzotriazol-2-yl) -4-hydroxy-5-octylphenyl) ethyl) terephthalate,
Bis (3- (2H-benzotriazol-2-yl)-
4-hydroxy-5-propyltoluyl) octadioate and the like can be mentioned. Especially 2,2'-methylenebis
[4- (1,1,3,3-tetramethylbutyl) -6-
(2H-benzotriazol-2-yl) phenol]
Are particularly preferably used. These ultraviolet absorbers may be used alone or in combination of two or more.

However, if the above-mentioned UV absorbers that are industrially available have low purity and are used as they are,
The polycarbonate resin turns yellow during extrusion and molding. UV absorbers that are commercially available are G
It is 98% or less by PC measurement.

Therefore, it is desirable to use industrially obtained ultraviolet absorber after purifying it to a desired purity of 98% or more. The purification method can be a known purification method. The purification method by recrystallization is simple and industrially applicable.

As the solvent used for recrystallization, it is desirable that the solubility of the ultraviolet absorber is sufficiently high at a high temperature and the solubility at a cooling temperature which is industrially practicable is sufficiently low. Further, it is necessary that the impurity component is effectively removed by this recrystallization operation. Examples of the solvent having such characteristics include alcohols, ethers, esters, ketones, aromatic hydrocarbon compounds, and the like, and aromatic hydrocarbon compounds are preferably used. More preferably, it is an aromatic hydrocarbon compound having 6 to 10 carbon atoms. More specifically, as the aromatic hydrocarbon compound solvent, benzene,
Toluene, xylene, ethylbenzene, mesitylene, n
-Propylbenzene, i-propylbenzene, pseudocumene and the like can be mentioned. Among these solvents, benzene and toluene can be mentioned as particularly preferable solvents.

The recrystallization operation can be carried out by a known method. That is, after dissolving the ultraviolet absorber in a solvent by heating, the crystals are precipitated by cooling, the solution and the crystals are separated by filtration, the crystals are rinsed with a solvent if necessary, and the solvent is removed by drying to enhance the crystal. A pure ultraviolet absorber can be obtained. Further, if necessary, it is possible to obtain a higher-purity ultraviolet absorber by carrying out the recrystallization operation twice or more. Further, if necessary, after heating and dissolving the ultraviolet absorber in a solvent that can be separated from water, after washing to extract impurities into the water layer, the water tank is separated, the crystal is precipitated by cooling the organic layer Is also an effective method.

The present invention is characterized by using an ultraviolet absorbent having a purity of 98% or more as measured by GPC by the above purification. It is preferably 99% or more, more preferably 99.5% or more.

The amount of the ultraviolet absorber used is 0.001 to 3 with respect to 100 parts by weight of the polycarbonate resin.
Parts by weight are preferred. More preferably, it is 0.01 to 2 parts by weight. If it is less than this, the desired effect cannot be obtained,
If it is excessive, the hue is deteriorated, the heat resistance is deteriorated, and the mechanical properties are deteriorated.

In addition to the ultraviolet absorber, it is desirable to appropriately add various known stabilizers. Examples of the stabilizer include a sulfur-containing acidic compound or a derivative formed from the acidic compound, a phenolic stabilizer, a phosphorus antioxidant, a thioether stabilizer, a hindered amine stabilizer, an epoxy stabilizer and the like. You can These stabilizers can be used alone or in combination. Above all, addition of a phosphorus-based antioxidant is effective in preventing hue deterioration during extrusion and during molding.

Further, in the present invention, in addition to the above ultraviolet absorber, heat stabilizer and hydrolysis stabilizer, antioxidants, pigments, dyes, reinforcing agents and fillers, lubricants, release agents, crystal nucleating agents , A plasticizer, a fluidity improver, an antistatic agent and the like can be added.

The components of the above-mentioned ultraviolet absorber and various additives can be mixed with the polycarbonate resin by a conventionally known method. In the case of the transesterification method, a method in which these additives are directly mixed with the molten resin after completion of the polymerization, and the mixture is cooled and pelletized is preferably used. In the phosgene method and the transesterification method, after once being isolated as flakes or pellets, each component is dispersed and mixed with a high-speed mixer represented by a turnable mixer, a Henschel mixer, a ribbon blender, or a super mixer,
A method of melt-kneading with an extruder, a Banbury mixer, a roll or the like is appropriately selected.

[0026]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples. The obtained polycarbonate resin composition was evaluated by the following methods.

UV absorber GPC purity: GPC device (S
Four GPC columns K-805L were attached to the hodex GPC system 11), and measurement was performed using a UV detector. Chloroform was used as the eluent. Ultraviolet absorbent APHA: 5 g of the sample was dissolved in 100 ml of methylene chloride and measured by comparing with a standard solution according to JIS K6901. Molecular weight measurement: GPC (Shodex GPC system)
m 11) was used to measure as a polystyrene reduced molecular weight (weight average molecular weight: Mw). Chloroform was used as the developing solvent. Test piece molding: SAV-40- manufactured by Yamashiro Seiki Co., Ltd.
A molded product was obtained using 50-CP. Hue (YI): 50 mmφ, 1 mm thick disc test piece was prepared and color difference meter (Tokyo Denshoku TC-1800MK2)
The YI (yellowness) value was measured by. Ultraviolet transmittance: 50 mmφ, 1 mm thick disk test piece was prepared, and it was measured with an absorptiometer (Shimadzu UVmini 1240) to 3
The transmittance at 80 nm was measured. Optical properties: Measured with an Abbe refractometer NAR-2T manufactured by Atago Seisakusho. Tg: Measured with a differential operation calorimeter DSC-60A manufactured by Shimadzu Corporation.

Purification Example 1 Commercially available 2,2'-methylenebis [4- (1,1,3,3,3)
-Tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol] (trade name: LA-31,
Hereinafter referred to as LA-31) GPC purity 97.5%, APH
A, No. 40-100 No. 500 g was completely dissolved in toluene 1500 ml at a temperature of 90 ° C., then cooled to room temperature and LA
-31 was recrystallized. The crystals were separated from the solution using a Nutsche, and the crystals were rinsed with 2000 ml of toluene and then dried at 60 ° C. in a vacuum dryer to purify LA-31.
399 g of (L-1) was obtained. The obtained LA-31 (L-
GPC purity of 1) is 98.8%, Hazen color number is 40-
It was number 100.

Purification Example 2 0.2 μm when completely dissolved at 90 ° C. in Purification Example 1
Purified LA-31 (L-
2) 385 g was obtained. The obtained LA-31 (L-2) had a GPC purity of 99.9% and a Hazen color number of 40-100.
It was turn.

Synthesis Example 1 BPZ6038.1 kg (22.5 mol), TCDDM
4416.5 g (22.5 mol), diphenyl carbonate 10832.5 g (47.25 mol), and sodium bicarbonate 0.0113 g (1.35 * 10 ⁻⁴ mol),
The mixture was placed in a 50-liter reaction kettle equipped with a stirrer and a distillation device, heated to 200 ° C. under a nitrogen atmosphere, and stirred for 30 minutes. After that, the degree of reduced pressure was adjusted to 150 mmHg, and at the same time, the temperature was raised to 240 ° C. and the transesterification reaction was performed while distilling off the by-produced phenol. When the distillation of phenol was almost completed, the degree of vacuum was further raised and stirring was further carried out for 2 hours under the condition of 1 mmHg or less. After the reaction was completed, nitrogen was blown into the reactor to return it to normal pressure, and the produced polycarbonate was taken out. The molar ratio of the structural unit derived from BPZ to the structural unit derived from TCDDM of this copolymer is
50:50, Mw = 58,300, refractive index nD =
A resin having physical properties of 1.58, Abbe number νD = 39, and Tg = 123 ° C. was obtained.

Examples 1 and 2, Comparative Example 1 Polycarbonate resin powder (Iupilon S-3000 manufactured by Mitsubishi Gas Chemical Co., Inc.) synthesized by an interfacial polymerization method using 2,2-bis (4-hydroxyphenyl) propane as an aromatic dihydroxy compound. ) 100 parts by weight were compounded in the composition ratio shown in Table 1 and mixed with a tumbler type blender,
Pelletized with a 40 mmφ single screw extruder.

Examples 3-5, Comparative Example 2 Polycarbonate resin pellet 10 obtained in Synthesis Example 1
To 0 part by weight, 0.0007 parts by weight of n-butyl p-toluenesulfonate as a catalyst deactivator and other additives were blended in a composition ratio shown in Table 1, and after mixing with a tumbler type blender, Pelletized with a 30 mmφ twin-screw extruder.

[0033]

[Table 1] P-1: Mitsubishi Gas Chemical Co., Ltd. Iupilon S-30
00 P-2: BPZ / TCDDM copolymerized polycarbonate resin L-1: 2,2′-methylenebis purified in Purification Example 1
[4- (1,1,3,3-tetramethylbutyl) -6-
(2H-benzotriazol-2-yl) phenol] L-2: 2,2′-methylenebis purified in Purification Example 2
[4- (1,1,3,3-tetramethylbutyl) -6-
(2H-benzotriazol-2-yl) phenol] A-1: tris (2,4-di-t-butylphenyl) phosphite (trade name A2112) A-2: bis (2,6-di-t-) Butyl-4-methylphenyl) pentaerythritol-di-phosphite (trade name PEP-36)

[0034]

INDUSTRIAL APPLICABILITY The polycarbonate resin of the present invention efficiently absorbs ultraviolet rays having a specific wavelength or less and is excellent in hue while maintaining the excellent properties of polycarbonate such as impact resistance and heat resistance. It can be suitably used for plastic optical materials such as industrial lenses, prisms and optical disk substrates.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Sadanori Isahaya             35, Towada, Kamisu-cho, Kashima-gun, Ibaraki Prefecture             Kashima Factory (72) Inventor Ken Tasaki             35, Towada, Kamisu-cho, Kashima-gun, Ibaraki Prefecture             Kashima Factory (72) Inventor Hiromitsu Nagashima             Mie Prefecture Yokkaichi City Hinohito 2-4-16               Mitsubishi Gas Chemical Co., Ltd. Yokkaichi Plant F-term (reference) 4J002 CG011 CG021 CG031 EU176                       FD056 GP01                 4J029 AA09 AB07 AC02 AE04 BB04A                       BB05A BB10A BB12A BB13A                       BB13B BB13C BD07 BD09A                       BD09C BD10 BF13 BF14A                       BF14B BG08X BH02 DB07                       DB11 DB13 HA01 HC01 HC02                       HC04 HC05

Claims (8)

[Claims] 1. To 100 parts by weight of a polycarbonate resin, 9 parts
A polycarbonate resin composition containing 0.001 to 3.0 parts by weight of a benzotriazole-based ultraviolet absorber having the following structural formula (1) with a purity of 8% or more. [Chemical 1] (In the above formula (1), R ₁ and R ₂ are a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a hydroxyalkyl group or a phenyl group,
R ₁ and R ₂ may be the same or different. Moreover, m and n represent the number of substituents and are integers of 0-4. R ₃ is a direct bond, an alkylidene group, an aryl-substituted alkylene group,
Arylene group, -O-, -S-, -CO-, -SO 2 - or -R ₄ -
_{X-R 5 -Y-R 6} - (R 4, R 5, R 6 is a direct bond, alkylidene group, aryl-substituted alkylene group, an arylene group, X, Y represents a direct bond or an ester bond, at least one Represents an ester bond). ) 2. The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin is an aromatic polycarbonate resin. 3. The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin is an aromatic-aliphatic copolymer polycarbonate resin aromatic polycarbonate resin. 4. The polycarbonate resin is an aromatic-aliphatic copolymerized polycarbonate resin obtained by copolymerizing an aromatic dihydroxy compound and an aliphatic dihydroxy compound having an alicyclic structure by a transesterification method. Polycarbonate resin composition. 5. The aliphatic dihydroxy compound is tricyclo (5.2.1.0 ^2.6) decane dimethanol, beta, beta,
β ', β'-Tetramethyl-2,4,8,10-tetraoxaspiro [5,5] undecane-3,9-diethanol, 1,4-cyclohexanedimethanol and 2,6
A polycarbonate resin composition according to claim 4, which is one or more aliphatic dihydroxy compounds selected from the group of decalin dimethanol. 6. The aromatic dihydroxy compound is 2,2-bis (4-hydroxyphenyl) propane or 1,1-
The polycarbonate resin composition according to claim 4, which is bis (4-hydroxyphenyl) cyclohexane. 7. A spectacle lens for spectacles, which is manufactured from the polycarbonate resin according to claim 1. 8. The transmittance at 380 nm at a thickness of 1 mm is 5.
The spectacle lens according to claim 5, which is at most%.