JP3322019B2 - Aromatic polycarbonate resin composition and optical communication parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aromatic polycarbonate resin composition and a component for optical communication. More specifically, the present invention relates to an aromatic polycarbonate resin composition composed of an aromatic polycarbonate containing a rare earth element cation and having excellent transparency to light in the near infrared region, a method for producing the same, and a use thereof. The resin composition of the present invention absorbs light of a specific wavelength derived from a rare earth element cation,
It has features such as the generation of fluorescent light and a high refractive index, and is used in a wide range of optical fields such as optical communication components such as optical amplifiers, nonlinear optical materials, and lenses.

[0002]

2. Description of the Related Art In the past, inorganic glass was predominantly used as a material for producing products in the optical field. This is because of the excellent light transmittance, heat resistance, chemical resistance, water resistance, surface hardness, wear resistance,
This is due to characteristics such as a low coefficient of linear expansion. In recent years, with the progress of organic polymer material manufacturing technology, acrylic resin,
Transparent amorphous thermoplastic resins such as styrene-based resins and aromatic polycarbonate-based resins have been developed, and applications that take advantage of features not found in inorganic glass, such as excellent moldability, light weight, and toughness, such as cameras Applications such as glass materials for eyeglasses, lens materials for glasses, and headlamp cover materials for automobiles are expanding. In such general-purpose applications, inorganic glass, which has been used for a long time, still occupies the mainstream.

On the other hand, in a new field, for example, in the field of optical communication and electronic information, the function of amplifying loss (loss of signal strength) at the time of light transmission, wavelength conversion function, and the like have properties that are not present in conventional inorganic glass. There is a need for optical materials. In order to realize such functionalization, it is generally necessary to introduce elements or molecular structural units that exhibit these functions, and mixing or chemical modification is performed on the material. However, the adaptability to such functionalization or compounding was not sufficient.

Recently, for example, as an optical fiber amplifier material, an inorganic glass doped with a cation of a rare earth element such as erbium has attracted attention (for example, Electronics, September 1990, pp. 56-60, or OP).
TRONICS, 1990, 11, 47-53). This is an application of the excitation of electrons in erbium cation atoms by light in the visible to near-infrared region and the generation of fluorescence of a wavelength of about 1.5 μm. However, when inorganic glass is used as a matrix, the solubility of erbium cations is relatively low, so that it is at most several hundred ppm.
The formation of clusters due to the association of cations becomes remarkable by the addition of, and the addition of more than this has the disadvantage that the excitation efficiency is reduced, that is, the phenomenon of light amplification peaks out. In addition, since it is an inorganic glass material, toughness and moldability are not always satisfactory.

In order to improve such disadvantages, for example,
In the IEICE Transactions on Electronics and Communication Engineers, 1999, 4-232 etc.
There is disclosed a method of obtaining a quartz film containing a rare earth element uniformly and at a high concentration by a hydrolysis-condensation reaction in a homogeneous solution using a metal alkoxide and a chloride of a rare earth element as raw materials. However, in such a method, cracking and peeling of the quartz film from the substrate occur, so that there is a problem in the forming process that it is difficult to form a thick quartz film on the substrate.

On the other hand, addition of a rare earth element cation to an organic polymer material has been studied. For example, JP-A-5-86
No. 189 discloses a polysiloxane in which a rare earth element is incorporated in a polymer chain, which is obtained using chlorosilanes having an organic group and a chloride of a rare earth element as raw materials. JP-A-5-88026 discloses a material in a polyacrylate or polysiloxane containing a complex having excellent solubility in an organic solvent and oxidation resistance such as an acetylacetone complex of a rare earth element. . Further, Proceedings of the Society of Polymer Science, Vol. 43 (1), 29 (1994)
To synthesize a rare earth element cation salt of a polymerizable organic acid such as acrylic acid or methacrylic acid and polymerize or copolymerize such a rare earth cation carrying monomer to increase the cation concentration to about 10% by weight. Possible materials have been reported. By these methods, a rare earth element cation can be added at a high concentration to an organic polymer material having excellent moldability, but the synthesis method is complicated and may be an economic constraint in industrial application. , And the resins used have the drawback of having relatively low heat resistance.

[0007]

DISCLOSURE OF THE INVENTION The present invention comprises a rare earth element at a high concentration and uniformity, has a low water absorption, has unprecedented moldability and heat resistance, and is manufactured by a simple method. It is an object to provide possible optical component materials, to provide these optical component materials, and to provide optical components molded from these materials.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises an aromatic polycarbonate resin containing 0.001 to 10% by weight of a rare earth element cation. 3m in the wavelength range of 1300-1550nm excluding the absorption wavelength of elemental cations
In this case, a measure is taken to obtain an aromatic polycarbonate resin composition having a light transmittance of 50% or more at a thickness of m. According to the third aspect of the present invention, the rare-earth element cation is uniformly mixed in the monomer melt of the aromatic polycarbonate resin, and then the aromatic polycarbonate is polymerized. A means of producing a composition. Further, in the invention according to claim 5, there is provided a means for forming an optical communication component obtained from the aromatic polycarbonate resin composition according to claim 1 or 2.

Hereinafter, the present invention will be described in detail. In the present invention, the aromatic polycarbonate resin is obtained by reacting one or more bisphenols which may contain a polyhydric phenol as a copolymerization component, and a carbonate such as bisalkyl carbonate, bisaryl carbonate, or phosgene. What is manufactured.

Specific examples of bisphenols which are raw material components of the aromatic polycarbonate resin include bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, and 1,1-bis (4- Hydroxyphenyl) propane, 2,2-bis (4-hydroxyphenyl) propane or bisphenol A, 2,2-
Bis (4-hydroxyphenyl) perfluoropropane, 2,2-bis (4-hydroxyphenyl) butane,
2,2-bis (4-hydroxyphenyl) pentane,
2,2-bis (4-hydroxyphenyl) -3-methylbutane, 2,2-bis (4-hydroxyphenyl) hexane, 2,2-bis (4-hydroxyphenyl) -4-
Methylpentane, 1,1-bis (4-hydroxyphenyl) cyclopentane, 1,1-bis (4-hydroxyphenyl) cyclohexane, bis (4-hydroxy-3-
Methylphenyl) methane, bis (4-hydroxy-3-
Methylphenyl) phenylmethane, 1,1-bis (4-
Hydroxy-3-methylphenyl) ethane, 2,2-bis (4-hydroxy-3-methylphenyl) propane,
2,2-bis (4-hydroxy-3-ethylphenyl)
Propane, 2,2-bis (4-hydroxy-3-isopropylphenyl) propane, 2,2-bis (4-hydroxy-3-sec-butylphenyl) propane, 2,2-bis (4-hydroxy-3- sec-butylphenyl) propane, bis (4-hydroxyphenyl) phenylmethane,
1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1,1-bis (4-hydroxyphenyl)-
1-phenylpropane, bis (4-hydroxyphenyl) diphenylmethane, bis (4-hydroxyphenyl) dibenzylmethane, 4,4′-dihydroxydiphenylether, 4,4′-dihydroxydiphenylsulfone, 4,4′-dihydroxydiphenylsulfide ,
4,4'-dihydroxybenzophenone, phenolphthalein and the like can be mentioned. Representative of these are bisphenol A, 2,2-bis (4-hydroxyphenyl) perfluoropropane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1,1-bis ( 4-hydroxyphenyl) cyclohexane, 2,2-
Bis (4-hydroxy-3-methylphenyl) propane and the like can be mentioned. Most commonly, bisphenol A is used.

Polyhydric phenols are used as a copolymer component for the purpose of changing the rheological properties of the aromatic polycarbonate resin and improving the surface wear characteristics.
As a specific example, for example, 1,1,1-tris (4
-Hydroxyphenyl) ethane and the like.

The following are specific examples of the carbonates which are the raw material components of the aromatic polycarbonate resin. (A) bisalkyl carbonate: dimethyl carbonate, diethyl carbonate, di-n-propyl carbonate, diisopropyl carbonate, di-n-butyl carbonate, etc. (b) bisaryl carbonate: diphenyl carbonate, bis (2,4-dichlorophenyl) carbonate, Bis, (2,4,6-trichlorophenyl) carbonate, bis (2-nitrophenyl) carbonate, bis (2-cyanophenyl) carbonate, bis (4-methylphenyl) carbonate, bis (3-methylphenylcarbonate, Among these, bisalkyl carbonates such as dimethyl carbonate and diethyl carbonate, diphenyl carbonate, bis (3-methylphenyl) carbonate, etc. , Bis bisaryl carbonates such (4-methylphenyl) carbonate are preferably used, it is best among them, diphenyl carbonate from the reaction easiness.

The method for producing an aromatic polycarbonate resin includes (1) a pyridine method in which a bisphenol and a carbonate derivative which is active in nucleophilic attack are used as raw materials and a polycondensation reaction is carried out in an organic base such as pyridine; (2) bisphenol A conventionally known method, such as a melt polymerization method in which melt-polycondensation is carried out using a compound and a carbonate such as bisalkyl carbonate or bisaryl carbonate as a raw material, may be used. In addition, as the carbonate derivative used in the pyridine method of (1), phosgene, carbodiimidazole and the like can be mentioned.

Although the molecular weight of the aromatic polycarbonate resin used in the present invention is not particularly limited, it is usually measured by gel permeation chromatography (GPC) at a temperature of 40 ° C. using a tetrahydrofuran (THF) solvent. It is preferable that the weight average molecular weight Mw with respect to the monomolecular weight dispersed polystyrene is 5000 or more. From the viewpoints of toughness and formability, the range is preferably from 10,000 to 80,000, and most preferably from 15,000 to 65,000.

In general, for optical communication using an optical fiber or the like, a wavelength range of 1300 to 15 which is a preferable wavelength range is usually used because the optical loss is the smallest in a silicon glass fiber.
Light in the near infrared region having a wavelength of about 50 nm is used as transmission light. Therefore, it is desirable that the aromatic polycarbonate resin composition of the present invention has excellent light transmittance in the above-mentioned wavelength region. Normally, the light transmittance in a wavelength region of 1300 to 1550 nm excluding the absorption wavelength of the rare earth element cation described below needs to be 50% or more at a thickness of 3 mm. If the light transmittance is less than 50%,
The dispersion of the rare earth element cation is poor, and there is a problem in transparency. Preferably, the aromatic polycarbonate resin composition has a light transmittance of 60% or more,
It is more preferably at least 70%, most preferably at least 75%.

As described above, in order to obtain an aromatic polycarbonate resin composition having a high light transmittance in the above-mentioned wavelength region, the carbon-hydrogen bond in the bisphenol is converted to a carbon-hydrogen bond.
By forming a deuterium bond or a carbon-fluorine bond, an overtone component of absorption in the infrared (IR) region derived from the carbon-hydrogen bond is prevented from being included in the near-infrared wavelength region,
It is possible to increase the light transmittance in the above wavelength region. As bisphenols having a carbon-fluorine bond,
It is preferred to use 2,2-bis (4-hydroxyphenyl) perfluoropropane.

In the present invention, the above-mentioned aromatic polycarbonate resin contains a rare earth element ion. Rare earth element ions are optical properties unique to the resin composition, for example,
It fulfills the function of providing an optical amplification function, a wavelength conversion function, and the like. The rare earth element used in the present invention is defined as 3 in the periodic table.
Scandium (Sc), yttrium (Y), and the following elements collectively referred to as lanthanoids included in Group A: lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), and promethium (P
m), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (E)
r), thulium (Tm), ytterbium (Yb), or lutetium (Lu). Although the aromatic polycarbonate resin composition of the present invention contains a rare earth element in the form of a cation, the rare earth element cation may be used alone or as a mixture of plural kinds.

The valence of the rare earth cation is not limited, and is usually used as a divalent or trivalent cation, and is usually used in the form of a salt. As the salt, chloride, bromide, iodide, nitrate, perchlorate, bromate, acetate, sulfate and the like are suitable in terms of dispersibility in a polyamide resin. Further, double nitrates, double sulfates, and chelates can also be used. Cation fluoride, carbonate, phosphate,
Oxalates and the like can be used, but they may have poor dispersibility in resins, so special considerations are required when mixing and dispersing.

Salts containing a rare earth element suitable for the present invention include praseodymium chloride, praseodymium bromide, praseodymium iodide, praseodymium nitrate, praseodymium perchlorate,
Praseodymium bromate, praseodymium acetate, praseodymium sulfate, etc., praseodymium salts, neodymium chloride, neodymium bromide, neodymium iodide, neodymium nitrate, neodymium perchlorate, neodymium salts such as neodymium bromate, neodymium acetate, neodymium sulfate, europium chloride, Europium bromide, europium iodide, europium nitrate, europium perchlorate, europium bromate, europium acetate, europium salts such as europium sulfate, dysprosium chloride, dysprosium bromide, dysprosium iodide, dysprosium nitrate, dysprosium perchlorate, bromine Dysprosium salts such as dysprosium acid, dysprosium acetate, dysprosium sulfate, erbium chloride, erbium bromide, erbium iodide, erbium nitrate, erbium perchlorate, erbium bromate , Erbium acetate, and the like can be given erbium salts such as sulfuric acid erbium.

Of these, praseodymium salts, neodymium salts, and erbium salts having near-infrared fluorescence generating ability are particularly suitable for use in optical amplifiers. Among them, a signal suitable for an inorganic glass fiber such as silica glass is particularly preferable. Wavelength 1
Neodymium salts, praseodymium salts, and erbium salts, which are capable of generating fluorescence with a wavelength of about 300 to 1550 nm, are most preferred. When a europium salt and a dysprosium salt are used in combination, afterglow characteristics in which fluorescence is generated for a long time may be obtained.

The aromatic polycarbonate resin composition of the present invention contains 0.001 to 10% by weight of a rare earth element cation. If this amount is less than 0.001% by weight, desirable properties such as light amplification are hardly exhibited, and
If the amount is more than 10% by weight, the dispersibility of the cation may be extremely deteriorated, and both are not preferred. In the case of an optical communication component such as an optical amplifier or an optical waveguide, the content of the cation is preferably 0.01 to 1 from the viewpoint of fluorescence intensity.
0% by weight, more preferably 0.1 to 7% by weight, most preferably 0.5 to 5% by weight. The content of the rare earth element cation can be measured by quantification of ash when an organic component is burned in an electric furnace at a temperature of about 650 ° C., or by a physicochemical method such as X-ray fluorescence analysis. .

As described above, the aromatic polycarbonate resin composition of the present invention has a light transmittance in a wavelength region of 1300 to 1550 nm excluding the absorption wavelength of rare earth cations,
It needs to be 50% or more for a 3 mm thick flat plate. Here, in order to improve the light transmittance, the rare earth element cations need to be well dispersed in the resin matrix.
The average dispersed particle size of the cation domain is preferably as small as possible, but is preferably 100 nm or less, more preferably 7 nm or less.
It is 0 nm or less, more preferably 50 nm or less, further preferably 40 nm or less, and most preferably 30 nm or less.

In the case where the optical communication component is an optical amplifier having a function of recovering the attenuation of the communication light, the pump light (pump light) for effectively exciting the rare earth element which generates the fluorescence of the communication light wavelength is always used. By continuing the passage, the same fluorescence as the pulse waveform is generated by the stimulated emission phenomenon caused by the communication light pulse, so that an amplification effect is obtained. Therefore, when the resin composition of the present invention is used for an optical amplifier, it is necessary to have a fluorescence generating ability derived from a rare earth element cation.

The method of adding the rare earth element cation to the aromatic polycarbonate resin is not particularly limited. For example, (1) After adding the cation to the aromatic polycarbonate resin monomer, a melt polymerization method, a pyridine method, or the like is used. A method of producing an aromatic polycarbonate by a known method of,
(2) a method of adding and mixing the above cations to the aromatic polycarbonate resin solution and then removing the solvent, or
(3) A method of melt-kneading an aromatic polycarbonate resin and the above cation, and the like.

In the above methods (1) to (3) of adding the rare earth element cation to the aromatic polycarbonate resin, the addition of the cation to the aromatic polycarbonate resin monomer of (1) is carried out according to the dispersibility. It is most suitable in terms of the point. A particularly preferred method is a method of uniformly mixing the above cations in a monomer melt of an aromatic polycarbonate resin, and then polymerizing the aromatic polycarbonate. This is a method of uniformly mixing a polycarbonate resin in a monomer melt. According to this method, the existing production process of the aromatic polycarbonate resin can be utilized as it is, and it is extremely useful in industry.

The above-mentioned phenolate structure is a structure in which the above-mentioned cation and a phenolate group (Ar--O--; where Ar is an aromatic ring) are bonded by an ionic bond or a covalent bond. The formation of the phenolate structure promotes uniform mixing of the cation with the aromatic polycarbonate resin. The phenolate group may be derived from bisphenols as a raw material, or a low-molecular-weight phenol derivative that can be distilled off during the polymerization process, for example, phenol, o
-Cresol, m-cresol, p-cresol, 2,
It may be formed by adding 6-xylenol, 2,5-xylenol, 2,4-xylenol, 3,4-xylenol, 3,5-xylenol, or the like. The phenolate structure can be formed by an exchange reaction between a counter anion of a rare earth element cation and a phenolate group. That is,
The phenolate structure can be suitably formed by bringing the salt of the above cation into contact with a melt of a bisphenol or the above low molecular weight phenol derivative. In the case of such a method, the counter anion of the rare earth element cation is preferably one that can be removed in the polymerization process, for example, acetate ion, since it does not adversely affect the performance of the resin composition. is there.

The aromatic polycarbonate resin composition of the present invention may contain polyethylene, polypropylene, ethylene-α-olefin copolymer, polyamide elastomer, polyester elastomer, polyester ether amide, if necessary, as long as transparency is not impaired. , Thermoplastic resins such as polyether elastomers, styrene-based thermoplastic elastomers or acid-modified products thereof, acrylic rubber, core-shell type acrylic rubber, ionomer resins, polyamides, polyphenylene ethers, aromatic polyesters, epoxy resins; fumed silica, talc, Inorganic fillers such as kaolinite, glass beads, glass flakes, clay, calcium carbonate, calcium sulfate, alumina, titania, zirconia; calcium stearate, barium stearate, Lubricants such as zinc stearate; thermal stabilizer used in the other polyamide resin, an ultraviolet absorber,
Pigment, carbon black, ketjen black, graphite,
Additives such as antioxidants, plasticizers, and antistatic agents can be mixed.

Since the aromatic polycarbonate resin composition of the present invention has excellent moldability, it is possible to produce a desired molded article by various molding methods employed for molding the aromatic polycarbonate resin. is there. Examples of the molding method include an injection molding method, an extrusion molding method including T-die film forming and inflation molding, a blow molding method, a differential pressure air molding method such as a vacuum molding method and a pressure molding method, and a compression molding method. By such a molding method, molded articles such as injection molded articles, sheets, films, laminated films, rod-shaped molded articles, fibers, filaments, and hollow molded articles having an arbitrary shape can be obtained. In the case of forming a sheet or film or a hollow molded product, stretching employed for molding an aromatic polycarbonate resin is also possible.

The aromatic polycarbonate resin composition of the present invention makes use of characteristics such as excellent moldability, lightness, toughness, transparency, light amplification, wavelength conversion, afterglow characteristics, and high refractive index. It can be used for optical parts of any applications and shapes. For example, there are application examples of optical communication components such as optical amplifiers, optical waveguides, and optical fibers, nonlinear optical elements, lenses, and fluorescent materials in the dark. Further, the resin composition of the present invention has good light transmittance in the visible region, and thus can be used for a lens for visible light and the like.

[0030]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples unless it exceeds the gist thereof. In addition, in the following examples, various evaluations are based on the following methods. (1) Fluorescence measurement A dried sample is sandwiched between two cover glasses (approximately 0.15 μm thick), and the whole cover glass is heated to 280 ° C., so that the thickness of the sample becomes approximately 0.5 mm. To obtain a transparent sample plate. For the sample held between the cover glasses, UV-31 manufactured by Shimadzu Corporation is used.
300-300 by UV-visible-near infrared absorption spectrophotometer of 00S type
An absorption spectrum in a wavelength region of 1700 nm was measured, and an absorption wavelength corresponding to a peak of the absorbance was obtained, which was used as an excitation wavelength for fluorescence measurement. In the case of a sample containing europium, the absorption wavelength derived from europium obtained in the above absorption spectrum measurement was used as the excitation wavelength, and F-3000 manufactured by Hitachi, Ltd. was used.
The fluorescence spectrum in the wavelength region of 300 to 700 nm was measured with a type fluorometer. For samples containing erbium, praseodymium, or praseodymium, 15
It is known that fluorescence in the near-infrared region around 00 nm or 1300 nm is generated. Therefore, an absorption wavelength derived from each element is used as an excitation wavelength, and a near-infrared camera equipped with a visible light cut filter is used. The presence or absence of fluorescence was observed.

(2) Light transmittance Using an injection molding machine (J28SA) manufactured by Japan Steel Works, a flat plate having a thickness of 3 mm was formed from the dried sample. The molding conditions at this time were a barrel temperature setting of 280 ° C., a maximum injection speed, and a mold temperature of 80 ° C. The light transmittance spectrum of the thus obtained flat plate having a thickness of 3 mm was measured in the wavelength region of 400 to 1550 μm by the above-mentioned absorptiometer, and the light transmittance in this wavelength region excluding the absorption wavelength derived from the rare earth element cation was measured. The minimum value was determined. (3) Rare earth element cation content About 2 g of the sample was precisely weighed, completely incinerated in an electric furnace at 600 ° C., and calculated from the weight fraction of the residue. (4) Refractive index A typical sample was measured at 23 ° C. with an Abbe refractometer.

Example 1 20 g of bisphenol A and erbium (III) acetate tetrahydrate (reagent manufactured by Wako Pure Chemical Industries, Ltd.)
2.8 g was placed in a glass polymerization tube, the inside of the tube was replaced with nitrogen, and the temperature was raised to 250 ° C. over 50 minutes. When heated at this temperature for 40 minutes, acetic acid was generated, and the bisphenol A melt became pink and transparent and uniform, so the temperature was lowered to 200 ° C. 21.3 g of diphenyl carbonate was added thereto, and the temperature was raised again to 250 ° C. over 1 hour. As phenol was generated, the phenol was distilled off. After reacting at this temperature for 1 hour, decompression and temperature rise were started, and the temperature was raised to 280 ° C. and 150 Torr over 1 hour.
During this time, phenol distillation continued. Furthermore, the pressure was increased to 0.8 Torr over 20 minutes at this temperature, and after 1 hour, the pressure was returned to atmospheric pressure with nitrogen to complete the reaction. The total amount of distillate was about 22 ml. Table 1 shows the results of various evaluations of the obtained composition.

Example 2 In the example described in Example 1, praseodymium (III) acetate dihydrate (a reagent manufactured by Wako Pure Chemical Industries, Ltd.) was used instead of erbium (III) acetate tetrahydrate. Performed the same operation as in the same example. Table 1 shows the results of various evaluations of the obtained composition.

[Example 3] In the example described in Example 1, neodymium (III) acetate monohydrate (a reagent manufactured by Wako Pure Chemical Industries, Ltd.) was used instead of erbium (III) acetate tetrahydrate. Is
The same operation as in the same example was performed. Table 1 shows the results of various evaluations of the obtained composition.

Comparative Example 1 The procedure of Example 1 was repeated except that erbium (III) acetate tetrahydrate was not added.
The same operation as in the same example was performed. Table 1 shows the results of various evaluations of the obtained composition.

Comparative Example 2 The same operation as in Example 1 was performed except that erbium (III) acetate tetrahydrate was changed to 4 mg. Table 1 shows the results of various evaluations of the obtained composition. Since no absorption peak derived from the Er cation could be confirmed in the absorption spectrum measurement, the fluorescence spectrum measurement was not performed.

[0037]

[Table 1]

[0038]

The present invention has the following particularly advantageous effects, and its industrial value is extremely large. 1. The aromatic polycarbonate resin composition of the present invention contains a rare earth element cation and has excellent light transmittance for light in the visible to near-infrared region, so that it has the ability to absorb light and generate fluorescence from the cation. In addition, an increase in the refractive index is recognized due to the presence of the cation. 2. INDUSTRIAL APPLICABILITY The aromatic polycarbonate resin composition of the present invention has excellent moldability, lightness, and toughness, and thus is extremely useful as various optical components such as optical communication components such as optical amplifiers.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C08L 69/00

Claims (5)

(57) [Claims] 1. A rare earth element cation of 0.001 to 10
Weight percent containing aromatic polycarbonate resin,
1300-1 excluding the absorption wavelength of the rare earth cation
An aromatic polycarbonate resin composition having a light transmittance of 50% or more at a thickness of 3 mm in a wavelength region of 550 nm. 2. The aromatic polycarbonate resin composition according to claim 1, wherein the rare earth element is any of erbium (Er), praseodymium (Pr), and neodymium (Nd). 3. The aromatic aromatic cation according to claim 1, wherein the rare earth element cation is uniformly mixed in the monomer melt of the aromatic polycarbonate resin, and then the aromatic polycarbonate is polymerized. A method for producing a polycarbonate resin composition. 4. The aromatic polycarbonate according to claim 3, wherein a phenolate structure of the rare earth element cation is generated, and the rare earth element cation is uniformly mixed in the monomer melt of the aromatic polycarbonate resin. A method for producing a resin composition. 5. A component for optical communication, which is obtained from the aromatic polycarbonate resin composition according to claim 1 or 2.