JP2022100743A - Polycarbonate resin composition and illumination component - Google Patents

Abstract

To provide a polycarbonate resin composition which is excellent in flame retardancy and moldability, and is also excellent in transparency.SOLUTION: A polycarbonate resin composition contains, with respect to 100 pts.mass of a polycarbonate resin (A) containing 30-32 mass% of a polycarbonate resin (A1) of a viscosity average molecular weight of 10,000-16,500 and 68-70 mass% of a polycarbonate resin (A2) having a viscosity average molecular weight of 50,000-95,000, with respect to 100 mass% of the total of (A1) and (A2), 0.03-0.05 pts.mass of (B) potassium perfluorobutane sulfonate, and 0-0.3 mass ppm of the total sum of (C) solvent blue 97 and solvent violet 36.SELECTED DRAWING: None

Description

The present invention relates to a polycarbonate resin composition and a lighting component made of the same, and more particularly to a polycarbonate resin composition and a lighting component having excellent flame retardancy, moldability, and transparency.

Polycarbonate resin is a highly functional resin that has excellent physical properties such as impact resistance, heat resistance, weather resistance, and flame retardancy, and has high light transmittance. Utilizing these characteristics, for example, automobiles, electrical and electronic equipment, and housing It is widely used as a material for manufacturing parts in lighting equipment, optical applications and other industrial fields.
In particular, taking advantage of its excellent optical characteristics and flame retardancy, LED light sources have come to be used as translucent cover parts for lighting equipment, which are becoming mainstream in recent years.

Above all, in lighting parts such as lighting covers, lighting signs, screens, various displays, display covers and lenses using LEDs as a light source, it is required to maintain high light transmission so as not to reduce the lighting efficiency. Further, since high flame retardancy is required for lighting parts for offices and homes, polycarbonate resin containing various flame retardants is used.

For example, Patent Document 1 proposes a polycarbonate resin composition containing an organic metal salt-based compound as a flame retardant, but the balance between flame retardancy and moldability, as well as transparency and light transmission in thick walls are Not always sufficient.

Japanese Unexamined Patent Publication No. 2014-125499

The present invention was devised in view of the above problems, and is a polycarbonate resin composition having an excellent balance between flame retardancy and moldability and transparency (light transmission), and a lighting component using this polycarbonate resin composition. The purpose (issue) is to provide.

As a result of diligent studies to solve the above problems, the present inventors have combined a polycarbonate resin having a specific viscosity average molecular weight and a polycarbonate resin (A2) having a high viscosity average molecular weight in a specific amount ratio. We have found that a polycarbonate resin composition containing potassium perfluorobutane sulfonate and two specific dyes in a specific amount in combination solves the above problems, and has arrived at the present invention.
The present invention relates to the following polycarbonate resin composition and lighting components using this polycarbonate resin composition.

[1] A polycarbonate resin (A1) having a viscosity average molecular weight of 10,000 to 16,500 and a polycarbonate resin (A2) having a viscosity average molecular weight of 50,000 to 95,000, the sum of (A1) and (A2). Based on 100% by mass, 100 parts by mass of the polycarbonate resin (A) containing 30 to 32% by mass of (A1) and 68 to 70% by mass of (A2), and 0. A polycarbonate resin composition comprising 03 to 0.05 parts by mass, (C) Solvent Blue 97 and Solvent Violet 36 in a total of 0 to 0.3 mass ppm of both.
[2] The polycarbonate resin composition according to the above [1], wherein the melt tension measured at a resin temperature of 260 ° C. and a take-up speed of 20 m / min is 35 mN or more and 37 mN or less.
[3] A lighting component formed of the polycarbonate resin composition according to the above [1] or [2].
[4] The lighting component according to the above [3], wherein the lighting component is a cover or a lens arranged in front of the LED with the LED as a light source.

The polycarbonate resin composition of the present invention is excellent in flame retardancy and moldability, particularly moldability at the time of injection molding, and is also excellent in transparency, particularly thick wall and transparency (light transmission).
Further, by molding a lighting component using the polycarbonate resin composition and using it as a lighting fixture, it is possible to provide a lighting fixture having excellent combustion resistance and excellent transparency even with a thick wall.

Hereinafter, the present invention will be described in detail by showing embodiments and examples, but the present invention is not limited to the embodiments and examples shown below.

The polycarbonate resin composition of the present invention comprises a polycarbonate resin (A1) having a viscosity average molecular weight of 10,000 to 16,500 and a polycarbonate resin (A2) having a viscosity average molecular weight of 50,000 to 95,000 (A1). (B) Perfluorobutane with respect to 100 parts by mass of the polycarbonate resin (A) containing 30 to 32% by mass of (A1) and 68 to 70% by mass of (A2) based on a total of 100% by mass of (A2). It is characterized by containing 0.03 to 0.05 parts by mass of potassium sulfonate, and 0 to 0.3% by mass in total of (C) Solvent Blue 97 and Solvent Violet 36.

[Polycarbonate resin (A)]
The polycarbonate resin (A) which is the component (A) of the present invention contains the above-mentioned polycarbonate resin (A1) and the polycarbonate resin (A2).

[Polycarbonate resin (A1)]
The molecular weight of the polycarbonate resin (A1) is a viscosity average molecular weight (Mv) of 10,000 to 16,500, preferably 11,000 or more, more preferably 11,500 or more, and preferably 16,000 or less. , 15,000 or less, more preferably 14,500 or less.

[Polycarbonate resin (A2)]
The viscosity average molecular weight (Mv) of the polycarbonate resin (A2) is 50,000 to 95,000. The viscosity average molecular weight of the polycarbonate resin (A2) is preferably 55,000 or more, more preferably 60,000 or more, particularly 61,000 or more, particularly 62,000 or more, and preferably 90,000 or more. It is more preferably 85,000 or less, more preferably 80,000 or less, particularly 75,000 or less, and particularly preferably 70,000 or less.

The polycarbonate resin composition of the present invention contains polycarbonate resin (A1) and polycarbonate resin (A2) in a total of 100% by mass of the polycarbonate resins (A1) and (A2), and (A1) in an amount of 30 to 32% by mass (A1). A2) is contained in the range of 68 to 70% by mass.
By containing it in such a range, it is possible to improve the flame retardancy and moldability of the polycarbonate resin (A2) in a well-balanced manner due to the dripping prevention effect, and (B) potassium perfluorobutane sulfonate is also added. By containing it, a higher degree of flame retardancy can be achieved.

In the present invention, the viscosity average molecular weight of the polycarbonate resin is determined by measuring the viscosity of the methylene chloride solution of the polycarbonate resin at a temperature of 25 ° C. using an Ubbelohde viscous meter to obtain the ultimate viscosity ([η]), and the following Schnell. It is a viscosity average molecular weight (Mv) calculated from the viscosity formula of.
[Η] = 1.23 × 10 ^-4 Mv ^0.83

The types of the polycarbonate resins (A1) and (A2) are not limited, and examples thereof include aromatic polycarbonate resins, aliphatic polycarbonate resins, and aromatic-aliphatic polycarbonate resins, but aromatic polycarbonate resins are preferable. An aromatic polycarbonate polymer or copolymer obtained by reacting an aromatic dihydroxy compound with a phosgene or a carbonic acid diester is preferably used.
The aromatic polycarbonate polymer may have a branch. The method for producing the aromatic polycarbonate resin is not particularly limited, and a conventional method such as a phosgene method (interfacial polymerization method) or a melting method (transesterification method) can be used.

Typical examples of aromatic dihydroxy compounds include bis (4-hydroxyphenyl) methane, 2,2-bis (4-hydroxyphenyl) propane, and 2,2-bis (4-hydroxy-3-methylphenyl). ) Propane, 2,2-bis (4-hydroxy-3-t-butylphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (4-hydroxy) -3,5-dibromophenyl) propane, 4,4-bis (4-hydroxyphenyl) heptane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 4,4'-dihydroxybiphenyl, 3,3', 5 , 5'-Tetramethyl-4,4'-dihydroxybiphenyl, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) ether, bis (4-hydroxyphenyl) ketone And so on.

Among the aromatic dihydroxy compounds, 2,2-bis (4-hydroxyphenyl) propane (that is, bisphenol A) is particularly preferable.
Further, the aromatic dihydroxy compound may be used alone or in combination of two or more.

[(B) Potassium perfluorobutane sulfonate]
The polycarbonate resin composition of the present invention contains (B) potassium perfluorobutane sulfonate. (B) By containing potassium perfluorobutane sulfonate, it is possible to promote the formation of a carbonized layer during combustion of the polycarbonate resin composition of the present invention and further enhance the flame retardancy, and further, the polycarbonate resin (A2) can be used. By the synergistic effect with the dripping prevention effect, it achieves a high degree of flame retardancy, enables high transparency (light transmission) in thick walls, and has impact resistance, etc. of the polycarbonate resin (A) itself. It is possible to maintain good properties such as mechanical properties, heat resistance, and electrical properties of polycarbonate.

The content of (B) potassium perfluorobutanesulfonate in the polycarbonate resin composition of the present invention is 0.03 to 0.05 parts by mass with respect to 100 parts by mass of the polycarbonate resin (A). (B) If the content of potassium perfluorobutane sulfonate is too low, the flame retardancy of the obtained polycarbonate resin composition becomes insufficient, and conversely, if it is too high, the transparency of the polycarbonate resin, especially the transparency in thick walls. (Light transmission) is likely to decrease, and the appearance of the molded product is likely to be poor and the mechanical strength is likely to decrease.

[(C) Solvent Blue 97 and Solvent Violet 36]
The polycarbonate resin composition of the present invention contains (C) Solvent Blue 97 and Solvent Violet 36 in an amount of 0 to 0.3 mass ppm as a bluing dye that exhibits blue to purple by absorbing orange to yellow light rays. That is, it does not have to be contained, and if it is contained, both are contained in an amount of 0.3 mass ppm or less in total.

Specific examples of the dye having the common name Solvent Blue 97 include the trade name "Macrolex Blue RR" manufactured by LANXESS Co., Ltd.
Further, as the dye whose common name is Solvent Violet 36, specifically, the trade name "Macrolex Violet 3R" manufactured by LANXESS Co., Ltd. can be mentioned.

(C) When the contents of Solvent Blue 97 and Solvent Violet 36 exceed 0.3 mass ppm, the light transmission is lowered, and the brightness (illuminance) and the luminous flux when the LED lighting cover or the like is used are lowered.

[(D) Stabilizer]
The polycarbonate resin composition of the present invention preferably contains a stabilizer, and particularly preferably contains a phosphorus-based stabilizer. By containing a phosphorus-based stabilizer, the hue of the polycarbonate resin composition of the present invention can be further improved, and the thermal stability can also be enhanced.

Any known phosphorus-based stabilizer can be used. Specific examples are oxo acids of phosphorus such as phosphoric acid, phosphonic acid, phosphite, phosphinic acid and polyphosphate; acidic pyrophosphate metal salts such as acidic sodium pyrophosphate, potassium pyrophosphate, acidic calcium pyrophosphate; phosphoric acid. Phosphates of Group 1 or Group 10 metals such as potassium, sodium phosphate, cesium phosphate, zinc phosphate; organic phosphate compounds, organic phosphite compounds, organic phosphonite compounds, etc., but organic phosphite compounds Especially preferable.

Examples of the organic phosphite compound include triphenylphosphite, tris (monononylphenyl) phosphite, tris (monononyl / dinonyl-phenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, and monooctyl. Diphenylphosphite, dioctylmonophenylphosphite, monodecyldiphenylphosphite, didecylmonophenylphosphite, tridecylphosphite, trilaurylphosphite, tristearylphosphite, 2,2-methylenebis (4,6-di- tert-Butylphenyl) octylphosphite and the like can be mentioned. Specific examples of such an organic phosphite compound include, for example, "ADEKA STAB 1178", "ADEKA STAB 2112", "ADEKA STAB HP-10" manufactured by ADEKA, and "JP-351" manufactured by Johoku Chemical Industry Co., Ltd. Examples thereof include "JP-360", "JP-3CP", and "Irgafos 168" manufactured by BASF.

The content of the stabilizer is usually 0.0001 part by mass or more, preferably 0.001 part by mass or more, more preferably 0.01 part by mass or more, and more preferably 0.01 part by mass or more, based on 100 parts by mass of the polycarbonate resin (A). It is usually 1 part by mass or less, preferably 0.7 part by mass or less, and more preferably 0.5 part by mass or less. If the content of the stabilizer is less than the lower limit of the above range, the heat stabilizing effect may be insufficient, and if the content of the stabilizer exceeds the upper limit of the above range, the effect is leveled off and the economy is economical. It may not be the target.

[(E) UV absorber]
The polycarbonate resin composition of the present invention preferably contains an ultraviolet absorber.
Examples of the ultraviolet absorber include organic ultraviolet absorbers such as benzotriazole compounds, benzophenone compounds, salicylate compounds, cyanoacrylate compounds, triazine compounds, oxanilide compounds, malonic acid ester compounds, and hindered amine compounds. Among these, the benzotriazole compound is more preferable, and the polycarbonate resin composition of the present invention has good transparency and mechanical properties.

Specific examples of the benzotriazole compound include, for example, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- [2'-hydroxy-3', 5'-bis (α, α-dimethylbenzyl). ) Phenyl] -benzotriazole, 2- (2'-hydroxy-3', 5'-di-tert-butyl-phenyl) -benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5' -Methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3', 5'-di-tert-butyl-phenyl) -5-chlorobenzotriazole), 2- (2'-hydroxy-3) ', 5'-di-tert-amyl) -benzotriazole, 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole, 2,2'-methylenebis [4- (1,1,3) 3-Tetramethylbutyl) -6- (2N-benzotriazole-2-yl) phenol] and the like, among which 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole, 2,2'. -Methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazole-2-yl) phenol] is preferable, and 2- (2'-hydroxy-5'-tert-) is particularly preferable. Octylphenyl) Benzotriazole is preferred.

The content of the ultraviolet absorber is usually 0.01 part by mass or more, preferably 0.1 part by mass or more, and usually 3 parts by mass or less, preferably 1 part by mass with respect to 100 parts by mass of the polycarbonate resin (A). It is less than the mass part. If the content of the ultraviolet absorber is less than the lower limit of the above range, the effect of improving the weather resistance (light resistance) may be insufficient, and the content of the ultraviolet absorber exceeds the upper limit of the above range. In that case, mold ultraviolet rays and the like may occur, causing mold contamination.

[(F) Release agent]
The polycarbonate resin composition of the present invention preferably contains a mold release agent.
Examples of the mold release agent include an aliphatic carboxylic acid, an ester of an aliphatic carboxylic acid and an alcohol, an aliphatic hydrocarbon compound having a number average molecular weight of 200 to 15,000, and a polysiloxane-based silicone oil.

Examples of the aliphatic carboxylic acid include saturated or unsaturated aliphatic monovalent, divalent or trivalent carboxylic acids. Here, the aliphatic carboxylic acid also includes an alicyclic carboxylic acid. Among these, the preferred aliphatic carboxylic acid is a monovalent or divalent carboxylic acid having 6 to 36 carbon atoms, and an aliphatic saturated monovalent carboxylic acid having 6 to 36 carbon atoms is more preferable. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, araquinic acid, bechenic acid, lignoseric acid, cellotic acid, melissic acid, tetrariacontanic acid, montanic acid and adipine. Acids, azelaic acid and the like can be mentioned.

As the aliphatic carboxylic acid in the ester of the aliphatic carboxylic acid and the alcohol, for example, the same one as the above-mentioned aliphatic carboxylic acid can be used. On the other hand, examples of the alcohol include saturated or unsaturated monohydric or polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these, monohydric or polyhydric saturated alcohols having 30 or less carbon atoms are preferable, and aliphatic or alicyclic saturated monohydric alcohols or aliphatic saturated polyhydric alcohols having 30 or less carbon atoms are more preferable.

Specific examples of such alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaerythritol and the like. Can be mentioned.

Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture containing myricyl palmitate as a main component), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, and glycerin monosteer. Examples thereof include rate, glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.

Examples of the aliphatic hydrocarbon having a number average molecular weight of 200 to 15,000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, fisher-tropus wax, α-olefin oligomer having 3 to 12 carbon atoms and the like. Here, the aliphatic hydrocarbon also includes an alicyclic hydrocarbon.
Among these, paraffin wax, polyethylene wax or a partial oxide of polyethylene wax is preferable, and paraffin wax and polyethylene wax are more preferable.
The number average molecular weight of the aliphatic hydrocarbon is preferably 5000 or less.

The content of the release agent is usually 0.001 part by mass or more, preferably 0.01 part by mass or more, and usually 2 parts by mass or less, preferably 1 part by mass with respect to 100 parts by mass of the polycarbonate resin (A). It is less than the mass part. If the content of the release agent is less than the lower limit of the above range, the effect of the release property may not be sufficient, and if the content of the release agent exceeds the upper limit of the above range, the hydrolysis resistance There is a possibility that the mold will be reduced and the mold will be contaminated during injection molding.

[Manufacturing of Polycarbonate Resin Composition]
The method for producing the polycarbonate resin composition of the present invention is not limited, and a known method for producing a polycarbonate resin composition can be widely adopted, and the above-mentioned essential components and other components to be blended as necessary can be used, for example. Examples thereof include a method of premixing using various mixers such as a tumbler and a henschel mixer, and then melt-kneading with a mixer such as a Banbury mixer, a roll, a brabender, a single-screw kneading extruder, a twin-screw kneading extruder, and a kneader.

Further, for example, it is also possible to produce a polycarbonate resin composition without premixing each component or by premixing only a part of the components and supplying the components to an extruder using a feeder for melt kneading. ..
Further, for example, a resin composition obtained by premixing some components and supplying them to an extruder to be melt-kneaded is used as a masterbatch, and this masterbatch is mixed with the remaining components again and melt-kneaded. Polycarbonate resin compositions can also be produced.
Further, for example, when a component that is difficult to disperse is mixed, the component that is difficult to disperse is dissolved or dispersed in a solvent such as water or an organic solvent in advance and kneaded with the solution or dispersion to disperse the component. It can also enhance sex.

The polycarbonate resin composition of the present invention is characterized by a high melt tension, and the melt tension measured at a resin temperature of 260 ° C. and a take-up speed of 20 m / min is preferably 35 mN or more and 37 mN or less. When the melt tension is in such a range, it is preferable because it can be excellent in flame retardancy and high moldability (particularly, moldability at the time of injection molding). When the melt tension is less than 35 mN, the flame retardancy tends to decrease, and when it exceeds 37 mN, the moldability tends to deteriorate.

[Molding]
The polycarbonate resin composition of the present invention is molded and shaped into an arbitrary shape to obtain a molded product.
As a method for producing a molded product, a molding method generally adopted for a polycarbonate resin composition can be arbitrarily adopted. For example, an injection molding method, an ultra-high speed injection molding method, an injection compression molding method, a two-color molding method, a hollow molding method such as gas assist, a molding method using a heat insulating mold, and a rapid heating mold were used. Molding method, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding) molding method, extrusion molding method, sheet molding method, thermal molding method, rotary molding method, laminated molding method, press molding method, A blow molding method and the like can be mentioned, and a molding method using a hot runner method can also be used.
Among these, injection molding methods such as an injection molding method, an ultra-high speed injection molding method, and an injection compression molding method are preferable, and the polycarbonate resin composition of the present invention is particularly excellent in moldability at the time of injection molding.

The molded product of the polycarbonate resin composition of the present invention is suitably used as a lighting component. Lighting parts are parts used for various lighting fixtures such as residential lighting fixtures such as ceiling lights, facility lighting fixtures such as base lights, and store lighting fixtures such as downlights, and in particular, various translucent shapes of arbitrary shapes. Examples thereof include various lighting components for LED lighting using an LED as a light source, and for example, a cover or a lens arranged on the front surface of the LED using the LED as a light source can be suitably used.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not construed as being limited to the following examples.
The components used in the examples and comparative examples are as shown in Table 1 below.

(Examples 1 to 7, Comparative Examples 1 to 5)
[Manufacturing of resin pellets]
Each component shown in Table 1 was blended so as to have the ratio shown in Table 3 and below (all indicated by parts by mass), and mixed uniformly with a tumbler mixer to obtain a mixture. This mixture is supplied to a twin-screw extruder (“TEM26SX” manufactured by Toshiba Machine Co., Ltd.), kneaded under the conditions of a screw rotation speed of 150 rpm, a discharge rate of 20 kg / hour, and a barrel temperature of 280 ° C., and extruded in a strand shape from the tip of the extrusion nozzle. rice field. The extruded product was rapidly cooled in a water tank, cut using a pelletizer and pelletized to obtain pellets of a polycarbonate resin composition.

[Flame retardance]
The pellets of the resin composition obtained above were injection-molded using an injection molding machine "SE100DU" manufactured by Sumitomo Heavy Industries, Ltd. under the conditions of a resin temperature of 300 ° C. and a mold temperature of 80 ° C., and had a length of 127 mm. UL test test pieces having a width of 12.7 mm and a wall thickness of 0.8 mm were obtained.
The obtained UL test piece was conditioned for 48 hours in a constant temperature room at 23 ° C and 50% relative humidity, and the UL94 test (plastic for equipment parts) specified by the US Underwriters Laboratories (UL). The test was carried out in accordance with the material combustion test).
UL94V is a method for evaluating flame retardancy from the residual flame time and drip property after indirect flame of a burner for 10 seconds on a test piece held vertically, and is V-0, V-1 and V-2. In order to have the flame retardancy of, it is necessary to meet the criteria shown in Table 2 below.

The flammability results were classified as V-0, V-1, V-2, and HB in order of goodness, and those out of the standard were classified as NG. In addition, the total residual flame time (unit: seconds) of 5 samples and the number of cotton ignitions by drip are described.

[Thick transparent]
The pellets of each of the obtained resin compositions were injection-molded using an injection molding machine "J85AD" manufactured by Japan Steel Works, Ltd. under the conditions of a resin temperature of 280 ° C. and a mold temperature of 80 ° C., and had a length of 50 × 50 mm. A block piece having a wall thickness of 18 mm was obtained as a test piece.
The transparency of this block piece was visually evaluated under a D65 light source.
◯: Transparent △: The core is slightly cloudy ×: Clearly cloudy

[Melting tension (unit: mN)]
For each of the obtained pellets of the resin composition, the pellets were dried at 120 ° C. for 4 hours or more, and using Capillograph 1D manufactured by Toyo Seiki Co., Ltd., the cylinder temperature was 260 ° C., the orifice diameter was 1.0 mm, the length was 10 mm, and the piston descent speed was 10 mm. The melt tension (mN) was measured at / min and a strand take-up speed of 20 m / min.
The melting tension is preferably 35 mN or more and 37 mN or less.

[Injection moldability]
The pellets of each of the obtained resin compositions were injection-molded using an injection molding machine "J50AD" manufactured by Japan Steel Works, Ltd. under the conditions of a resin temperature of 280 ° C., a mold temperature of 80 ° C., and a holding pressure of 80 MPa, and lengthened. A three-stage plate having a thickness of 90 mm, a width of 50 mm, and a wall thickness of 1, 2, and 3 mm was obtained as a test piece. The appearance of this plate was visually evaluated.
○: Good △: Slight flow mark, hot water wrinkle ×: Clearly flow mark, unfilled, silver streak

[LED bulb total luminous flux (unit: lm)]
The pellets of each of the obtained resin compositions were injection-molded using an injection molding machine "SE100DU" manufactured by Sumitomo Heavy Industries, Ltd. under the conditions of a resin temperature of 300 ° C. and a mold temperature of 80 ° C., and had a radius of 25.5 mm. A hemispherical molded product having a hemispherical thickness and a thickness of 1 mm was obtained.
The lighting cover of a commercially available LED bulb (PANASONIC, "EVERLEDS LDA7D-G") is removed, the hemispherical molded product is attached, and the total luminous flux is measured by Labsphere's total luminous flux spectroscopy measurement system CSLMS-2021 type (integrating sphere 20). Inch, measured with a spectroscope CDS-2100). The total luminous flux is preferably 680 lm or more.
The above evaluation results are shown in Table 3 below.

Since the polycarbonate resin composition of the present invention is a polycarbonate resin material having excellent flame retardancy, moldability, and transparency, it can be widely and suitably used for various lighting parts and the like, and its industrial utility is very high. high.

Claims (4)

A polycarbonate resin (A1) having a viscosity average molecular weight of 10,000 to 16,500 and a polycarbonate resin (A2) having a viscosity average molecular weight of 50,000 to 95,000 are added to a total of 100% by mass of (A1) and (A2). Based on the standard, 100 parts by mass of the polycarbonate resin (A) containing 30 to 32% by mass of (A1) and 68 to 70% by mass of (A2), 0.03 to 0 of potassium (B) perfluorobutane sulfonate. A polycarbonate resin composition comprising .05 parts by mass, (C) Solvent Blue 97 and Solvent Violet 36 in a total of 0 to 0.3% by mass of both. The polycarbonate resin composition according to claim 1, wherein the melt tension measured at a resin temperature of 260 ° C. and a take-up speed of 20 m / min is 35 mN or more and 37 mN or less. A lighting component formed of the polycarbonate resin composition according to claim 1 or 2. The lighting component according to claim 3, wherein the lighting component is a cover or a lens arranged in front of the LED with the LED as a light source.