TW200940624A - Polycarbonate resin composition and molded article for optical use made from the same - Google Patents

Abstract

Disclosed is a polycarbonate resin composition characterized by being composed of 100 parts by weight of a resin component, which is composed of 97-99.95% by weight of a polycarbonate resin (A) and 0.05-3% by weight of a polystyrene resin (B) having a weight average molecular weight of 1,000-18,000, and 0.02-2 parts by weight of a phosphorus antioxidant (C) and/or a phenolic antioxidant (D). Also disclosed is a molded article for optical use, which is made from such a polycarbonate resin composition. Since the polycarbonate resin composition is excellent in luminance, light transmittance, mechanical properties, heat resistance and hue stability, it is free from hue change or deterioration of the resin itself even when molded into a thin light guide plate (having a thickness of about 0.3 mm). Consequently, the polycarbonate resin composition is extremely high in commercial use value.

Description

200940624 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a kind of non-deteriorating heat resistance, ^ ^^^ ^ ^ ^ ^ 玑铖 strength, etc., and does not occur white turbidity and first line penetration reduction, hue And an optical product such as a polycarbonate resin body material or a nameplate which is bright and mellow, and a molded article for a light guide plate or a surface light-emitting material obtained therefrom. [Prior Art] ® is placed in a liquid crystal display, and is equipped with a planar device for the purpose of thinness, weight reduction, power saving, high brightness, and high precision. In the planar light source device, a light guide H having a wedge-shaped cross section having an inclined surface having the same inclination is provided. In order to obtain high luminance, a concave-convex pattern having a meandering shape is formed on the inclined surface to impart light scattering. (Patent Document 丨). The light guide plate can usually be obtained by injection molding of a thermoplastic resin, and the uneven pattern can be imparted by transfer of a concave-convex pattern formed on the surface of the mold. In the case of ❹, the light guide plate is formed of a material such as poly(mercapto acrylate) (PMMA). However, there is a tendency for the heat generation in the inside of the personal computer, the mobile phone, the PDA, etc., and in order to cope with the lightness and thinness of the machine, the thermoplastic resin to be used must require a resin having high heat resistance and high mechanical strength. 'Therefore, PMMA is gradually replaced by polycarbonate resin. 4 ° Polycarbonate resin is superior to PMMA' in terms of mechanical properties, thermal properties and electrical properties, but it is slightly inferior in light transmittance. Therefore, in the case of using a planar light source device of a polycarbonate resin light guide plate, there is a problem that the brightness is lower than that of 097147309 3 200940624 PMMA. It has been mentioned in the past that there are several ways to increase the brightness of the light guide plate. In Patent Document 2, there has been proposed a method of reducing brightness unevenness by using a glare brightener and a bead crosslinked acrylic resin, and improving brightness by a S-light whitening agent, and reducing unevenness of brightness by bead-like cross-linked acrylic resin; In Patent Reading 3, it has been proposed to increase the rate and brightness of the sewing material by adding an acrylic resin and an alicyclic epoxy resin. In Patent Document 4, it has been proposed to introduce a copolymerized vinegar carbonate to transfer the concave-convex pattern. Improve the method by which to increase the brightness. However, in the method of Patent Document 2, although the brightness can be partially increased due to the addition of the bead-like crosslinked propylene resin and the fluorescent whitening agent, the light transmittance is lowered, so that the portion far from the light source of the light guide plate is far away. The brightness is greatly reduced, and there is a problem that the reading cannot be obtained. In the method of Patent Document 3, although the hue is improved by the addition of the acrylic resin, the self-turbidity occurs, so that the light transmittance and the brightness cannot be improved, and the addition of the ring-shaped epoxy lion may be improved. Penetration rate, but there is no way to see the effect of hue improvement. In the case of the method of Patent Document 4, the effect of improving fluidity and transferability can be expected, and the heat resistance is lowered. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) The present invention provides a property that does not impair the original properties of a polycarbonate resin (that is, heat resistance, mechanical strength, etc., and does not cause white turbidity and light transmittance reduction). A polycarbonate resin composition having a good hue and a degree of freedom, and an optical molded article such as a light guide plate, a surface light-emitting material, and a name plate obtained by molding the same. (Means for solving the problem) Deliberate research to solve the above problems, and found that: by containing polystyrene resin and specific antioxidant in the polysulfide resin, it can be transmitted without white turbidity, light transmittance reduction, hue and brightness. The present invention relates to a molded article for optics such as a good light guide plate, and the present invention relates to a polycarbonate resin composition characterized in that it contains Polycarbonate tree (A) 97 to 99.95 wt% and a weight average molecular weight of 1000 to 18000. Resin component 100 composition of antioxidants (D) 0. 02~ etc. Optical molded article. (Invention effect) Polystyrene (B) 〇. 5 to 3 wt% by weight, phosphorus-based antioxidant (C) and/or phenol 2 parts by weight; and light guide plate obtained therefrom, the polycarbonate wax of the present invention, Since it is excellent in redundancy, light transmittance, mechanical properties, heat resistance, and hue stability whiteness, even in a thin type (having a thickness of about 0.3), the forming process of the light guide plate ψ ★ ^ ^ ^ can not cause hue change, Or the deterioration of the resin itself is extremely high in industrial use. 097147309 200940624 [Embodiment] The polycarbonate resin (A) used in the present invention is made by reacting various dihydroxydiaryl compounds with phosgene A gas method or a polymer obtained by a vinegar exchange method in which a di(tetra)diaryl compound and a diphenyl carbonate are reacted with a vinegar exchange method, and as a representative, 2, 2_double_(4) _Hydroxyphenyl)propane (double A) Polycarbonate resin. As the above dihydroxydiaryl compound, in addition to bisphenol A, bis(4-hydroxyphenyl)decane, 1}1-bis(4-hydroxyphenyl)ethane 22-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, bis(4-hydroxyphenyl)phenylnonane, 2,2-bis(4- Hydroxyphenyl-3-methylphenyl)propane, 1,1-bis(4-hydroxy-3-tert-butylphenyl)propane, 2,2-bis(4-hydroxy-3-ylbromophenyl)propane Bis(hydroxyaryl) such as 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, 2 2_bis(4-transyl-3,5-dichlorophenyl)propene or the like a bis(hydroxyaryl)cycloalkane such as 1,1-bis(4-hydroxyphenyl)cyclopentane or 1,1-bis(4-hydroxyphenyl)cyclohexane; 4, 4, a dihydroxydiaryl ether such as dihydroxydiphenyl sulphate, 4,4, dihydroxy-3,3,-dimercaptodiphenyl ether; 4,4-di-diphenyldithioether Etiso-dihydroxydiarylsulfanyl; 4 4, mono-diphenylphosphite, 4, 4'-di-mercapto-3, 3'-dimethyldiphenylpyrazine, etc. Hydroxydiaryl hydrazins; 4, 4' ~ Dihydroxydiphenyl, 4, 4 -di-diyl-3,3-dimethyldiphenyl stone, etc. These may be used singly or in combination of two or more. In addition to this, it is also possible to mix 097147309 6 200940624 with piperazine, dipiperazine hydroquinone, m-diphenol, 4 4,-dihydroxybiphenyl, and the like. Further, the above dihydroxyaryl compound may be used in combination with a trivalent or higher benzene compound shown below. Examples of the phenol having a trivalent or higher valence include: streptotriol (phl(10)glucin), 4,6-dimethyl-2,4,6-tri-(4,ylphenyl)-heptene^'- Dimethyl-^^-tris(-)-hydroxyphenyl-p-heptane~^b--hydroxyphenyl)-benzene, 1,1,1-tris-(4-hydroxyphenyl)-ethane and 2 , 2—biguanide-[4,4-(4,4′ _dihydroxydiphenyl)cyclohexyl]propane. The viscosity average molecular weight of the polycarbonate resin (A) is usually from ι to 100,000, preferably from 12,000 to 25,000, particularly preferably from 12 〇〇〇 to ι 800 。. In the production of the polycarbonate resin, a molecular weight modifier, a catalyst or the like may be used as needed. The polystyrene resin (B) used in the present invention has a weight average molecular weight of 1,000 to 18,000. If the weight average molecular weight of the polystyrene resin (β) is less than β 1000, the light transmittance will be deteriorated, and in the case of more than 18 ,, the light transmittance and the atomization rate will be deteriorated, so it is not good. . It is preferably 15 〇〇 to 1 〇〇〇〇, more preferably in the range of 2000 to 4000. The composition ratio of the polystyrene resin (yttrium) is preferably 5% to 3% by weight based on the resin component of (Α) and (Β), and is preferably 〇. If the composition ratio of the polystyrene resin (B) is less than 0.05% by weight, the improvement of the light transmittance and the brightness cannot be expected. Further, when the composition ratio exceeds 3% by weight, the light transmittance is lowered and the haze value is increased, which is not preferable. 097147309 7 200940624 As a commercially available polystyrene resin (B), JONCRYL ADF-1300 manufactured by BASF Corporation can be cited. The phosphorus-based antioxidant (C) and/or the phenol-based antioxidant (D) used in the present invention include the following compounds. The phosphorus-based antioxidant (C) may be one or more of the compounds represented by the following formulas 1, 2 and 3. Formula 1 [Chemical 1] R1 — Ο R2 — Ο

/0-R3 > \〇 - R4 (In the formula 1, R1 to R4 represent an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted by an alkyl group.) Formula 2 [Chemical 2]

/〇ch2 ch2〇\ 〇p( y/ p〇 , OCH2’ \cH20’

(R6)b (In the formula 2, R5 and R6 represent an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and a and b represent integers 0 to 3.) ] J 3 (R7)c 097147309 8 200940624 (In the formula 3, 'R7 represents an alkyl group having 1 to 2 carbon atoms, or an aryl group which may be substituted with an alkyl group, and c represents an integer of 0 to 3.) The compound of the formula 1 is exemplified by Clariant japan-Sandostab P-EPQ'. The compound of the formula 2 is ADK STAB ΡΕΡ-3Θ manufactured by Adeka Co., Ltd., and the compound of the formula 3 can be cited as Sumitomo. Sumilizer P-168, a chemical company, is commercially available. Further, examples of the benzene-based antioxidant (D) include a compound of the following formula 4. Formula 4 [Chemical 4]

Ch2ch2c-o-r8 (Formula 4, which shows a carbon number of ruthenium (9) or an aryl group which is also substituted by a ruthenium group.) As a compound of the formula 4, a commercially available product is manufactured by Ciba Specialty Chemicals Co., Ltd. Irganox 1076. The blending amount of the lining antioxidant (6) and/or the benzoin antioxidant (D) is 〇〇2 to 2 parts by weight based on 1 part by weight of the resin component composed of (A) and (B). . If the blending amount is less than 〇·〇2 parts by weight, the stability of the unique stability is not good. On the other hand, when it exceeds 2 parts by weight, the light transmittance is lowered and the haze value is increased, which is not preferable. The blending amount is suitably 0.04 to 1 part by weight, more preferably 〇 〜 5 to 097147309 9 200940624 〇·2 parts by weight. In this range, the light transmittance is not lowered, and excellent thermal stability is exhibited. Further, in addition to the effects of the present invention, various additives such as hot tanning agents, anti-gasifying agents, coloring agents, mold release agents, softening agents, antistatic agents, impact modifiers, and other polymerizations may be contained. Things. The mixing method of the various compounding components of the polycarbonate resin composition of the present invention is not particularly limited, and it may be a mixture of a known mixer, for example, a rotary drum or a spiral belt type mixer, or an extruder. Melt and knead. The molding method of the polycarbonate resin composition of the present invention is not particularly limited, and a known injection molding method, compression molding method, or the like can be used. Hereinafter, the present invention will be specifically described by way of examples, but the invention is not limited to the examples. In addition, "parts" and "%" are based on weight. (Example) According to the components and the blending amounts of Tables 1 to 4, each of the blending components was mixed in a rotary drum, and melted at a cylinder temperature of 220 ° C using a 40-mm diameter single-axis extruder (manufactured by Tanabe Plastics Co., Ltd.). After mixing, various kinds of particles are obtained. The formulations are as follows: 1. Polycarbonate resin: polycarbonate resin synthesized from bisphenol A and vaporized carbonyl

Sumitomo Dow SD1080C viscosity average molecular weight: 15 〇〇〇) (hereinafter, abbreviated as "PC1".) Polycarbonate tree synthesized from bisphenol A and vaporized carbonyl group 097147309 10 200940624

SD2000W (viscosity average molecular weight: 13,000) manufactured by Sumitomo Dow Co., Ltd. (hereinafter, abbreviated as "PC2".) 2. Polystyrene resin: 'JONCRYL ADF-1300 manufactured by BASF Corporation ・ (weight average molecular weight: 2800, hereinafter abbreviated as "psi ".)

Polystyrene produced by Aldrich Co., Ltd. (weight average molecular weight: 8 Å) (hereinafter abbreviated as "PS2".) 聚苯乙烯 Polystyrene produced by Aldrich Co., Ltd. (weight average molecular weight: 4000) (hereinafter abbreviated as "PS3".)

Polystyrene produced by Aldrich (weight average molecular weight: 13,000) (hereinafter abbreviated as "PS4".)

Polystyrene produced by Aldrich (weight average molecular weight: 2 〇〇〇〇) (hereinafter abbreviated as "PS5".)

Polystyrene produced by Aldrich (weight average molecular weight: 23,000) ❹ (hereinafter abbreviated as "PS6".)

Polystyrene produced by Aldrich (weight average molecular weight: 35,000) (hereinafter abbreviated as "PS7".) 3. Structure antioxidant:

p-EPQ manufactured by Clariant Japan (hereinafter abbreviated as "P system A01".)

ADK STAB PEP-36 manufactured by Adeka Co., Ltd. (hereinafter abbreviated as "p-system A02".) 097147309 11 200940624 P-168 manufactured by Sumitomo Chemical Co., Ltd. (hereinafter abbreviated as rp-type A03). 4. Benzene anti-gasification agent: Irganox 1076 (hereinafter abbreviated as "Ph system A0") by the company of the company of the company. (The method of producing the test piece for measuring the chromaticity, the light transmittance and the haze value) The obtained particles are at 12 (TC dry 4 After an hour, a test piece (9〇X5〇x2 mm) for measuring chromaticity, transmittance, and haze value was prepared by an injection molding machine (J-100SAII manufactured by Sakamoto Steel Co., Ltd.) at 280X: and an injection pressure of 1200 kg/cm2. Evaluation method of chromaticity The chromaticity is measured by Spectrophotometer CMS35-SP manufactured by Murakami Color Research Laboratory under the D65 light source and viewing angle 10. The colorimetric measurement is the maximum value of X and y when ri=10. The difference from the minimum value is 0 0005 or less as a pass. The results are shown in Tables 1 to 4. (Methods for Evaluating Light Penetration and Fog Value) The measurement of light transmittance and fog value is performed by Murakami Color Research Institute. The haze meter (Haze Meter) HM-150. The total light transmittance Tt is 90.4% And the fog value 0 is less than 0.7% as qualified. The results are shown in the table to Table 4. Further, the fog value is defined by the following formula according to the total light transmittance Tt and the diffusion transmittance Td. H (%) = (diffusion transmittance Td / total light transmittance Tt) x l 〇〇 097147309 12 200940624 [Table 1] Example 1 2 3 4 PC1 [%] 99. 9 99 98 — PC2 [%] — — — 99 PS1 [%] 0. 1 1 2 1 P system A01 [part] 0. 1 0. 1 0. 1 0. 1 Hue phase stability chroma X average 0. 3146 0. 3145 0. 3146 0. 3145 Max. 0. 3147 0. 3145 0. 3147 0. 3145 Minimum value 0. 3145 0. 3144 0. 3145 0. 3143 Poor 0. 0002 0. 0001 0.0002 0. 0002 Rating 〇〇〇〇 Chromaticity y Average 0. 3319 0. 3318 0.3320 0. 3316 Maximum value 0. 3320 0. 3318 0.3321 0. 3317 Minimum value 0. 3318 0. 3317 0. 3319 0. 3315 Difference 0. 0002 0. 0001 0.0002 0. 0002 Rating〇〇 〇〇Light transmittance [%] rating 90.4 〇90.7 〇90.5 〇90.7 〇 fog value [%] rating 0.3〇0.3 〇0.6 〇0.3 〇 Rating: Qualified (〇), unqualified (X) 10 097147309 13 200940624 [Table 2] Example 5 6 7 8 9 10 PC1 [%] 99 99 99 99 99 99 PS1 [%] 1 1 1 1 1 1 P system A01 [parts] — — — 0.05 0.2 0.05 P system A02 [parts] 0.1 — — — — — P system A03 [parts] — 0.1 — — — — Ph A0 [parts] — — 0.1 — — 0.05 Average 0. 3144 0.3145 0. 3145 0. 3145 0. 3145 0.3146 Maximum 0. 3145 0.3146 0.3146 0.3145 0.3146 0.3147 Chromaticity X Minimum value 0. 3144 0.3144 0. 3144 0. 3144 0. 3144 0.3146 Poor 0. 0001 0. 0002 0.0002 0. 0001 0. 0002 0.0001 Hue stability evaluation 〇〇〇〇〇〇 average 0.3318 0. 3318 0.3319 0.3318 0.3319 0.3319 Maximum 0.3319 0. 3319 0. 3320 0.3319 0. 3320 0.3320 Chromaticity y Minimum value 0. 3318 0.3317 0. 3318 0.3318 0.3318 0.3319 Poor 0.0001 0. 0002 0.0002 0. 0001 0.0002 0. 0001 Evaluation of 〇〇〇〇〇〇 light transmittance [%]Assessment 90. 70 90. 60 90. 70 90. 70 90.70 90. 70 Fog value [%] is assessed as 0.4〇0.4〇0.4〇0.4〇0.4 〇0.4〇Evaluation: Qualified (〇), unqualified (X) 097147309 14 200940624 [Table 3] Comparative Example 1 2 3 4 5 PC1 [%] 99. 99 99 99 99 99 PS1 [%] 0. 01 5 1 1 1 P system A01 [parts] 0. 1 0. 1 0. 01 2. 5 — Ph system A0 [parts] — — — — 0. 01 Hue phase stability chroma X average 0.3145 0. 3147 0. 3146 0.3145 0. 3146 Maximum 0.3146 0. 3149 0. 3149 0. 3146 0. 3147 Minimum 0.3143 0. 3146 0. 3143 0.3142 0. 3143 Difference 0.0003 0. 0003 0.0006 0. 0004 0. 0004 〇〇 〇〇 X 〇〇 度 y average 0.3318 0. 3320 0.3319 0. 3318 0.3319 Maximum 0. 3320 0. 3322 0.3323 0. 3320 0. 3324 Minimum 0.3317 0. 3318 0. 3317 0. 3316 0. 3317 差0. 0003 0. 0004 0.0006 0.0004 0. 0007 Evaluation 〇〇X 〇X Light transmittance [%] rating 90. 2 X 90. 3 X 90.6 〇90. 2 X 90.6 〇 fog value [%] rating 0.3 〇1. 1 X 0.5 〇0. 8 X 0.5〇 evaluation: pass (〇), unacceptable (X) 〇097147309 15 200940624 As shown in Examples 1 to 10, the polycarbonate resin having the requirements of the present invention The composition shows high light transmittance and brightness, excellent hue stability and low haze value. In Comparative Example 1, the amount of PS1 was less than the predetermined amount, and the light transmittance was poor. In Comparative Example 2, the amount of PS1 was larger than the prescribed amount, and the light transmittance and the fog value were both poor. In Comparative Example 3, when the amount of the phosphorus-based antioxidant was less than the predetermined amount, the color stability was inferior. In Comparative Example 4, when the amount of the phosphorus-based antioxidant was more than the prescribed amount, the light transmittance and the fog value were inferior. In Comparative Example 5, when the amount of the phenolic antioxidant was less than the predetermined amount, the color stability was poor. 097147309 16 200940624 [Table 4]

EXAMPLES Comparative Example 11 12 6 7 8 9 PCI [%] 99 99 99 99 99 99 PS2 [%] — — 1 — — — PS3 [%] 1 — One — — — PS4 [%] — 1 — — — — PS5 [%] — — — 1 — — PS6 [%] — — — — 1 — PS7 [%] — — — — — 1 P System A01 [Part] 0.1 0.1 0.1 0.1 0.1 0.1 Hue Stability X Ch 0.3146 0.3146 0.3147 0.3146 0. 3148 0.3149 Maximum 0.3147 0.3147 0.3149 0.3148 0. 3149 0.3150 Minimum value 0. 3144 0.3143 0.3146 0. 3145 0.3145 0.3145 Poor 0. 0003 0. 0004 0.0003 0.0003 0. 0004 0. 0005 Rating〇〇〇〇 〇〇 Chroma y Average 0. 3318 0.3319 0.3319 0.3319 0. 3320 0.3321 Maximum 0. 3319 0.3320 0.3321 0.3320 0. 3321 0. 3322 Minimum 0.3317 0.3317 0.3318 0.3317 0.3317 0.3318 Poor 0. 0002 0.0003 0.0003 0. 0003 0. 0004 0. 0004 Evaluation of light transmittance [%] rating 90.6 〇90.5 〇90.3 X 90.3 X 90. 0 X 89. 9 X fog value [%] rating 0.5〇0.5 〇0.4 〇0.6 〇0 . 8 X 1.0 X

097147309 17 200940624 As shown in Examples 11 and 12, the polycarbonate resin composition having the requirements of the present invention exhibits high light transmittance and brightness, excellent hue and low haze. Comparative Example 6 is a case where PS2 having a weight average molecular weight of 800 was used, and the light transmittance was poor. Comparative Example 7 is a case where PS5 having a weight average molecular weight of 20,000 was used, and the light transmittance was poor. Comparative Example 8 is a case where PS6 having a weight average molecular weight of 23,000 was used, and both light transmittance and haze value were poor. Comparative Example 9 is a case where PS7 having a weight average molecular weight of 35,000 was used, and both light transmittance and haze value were poor. 097147309 18

Claims (1)

200940624 VII. Patent application scope: 1. A polycarbonate resin composition characterized in that it contains 97-99.9% by weight of acid-heteropoly and a weight average molecular weight of ~18000 polystyrene resin (B) 〇〇5 〜2重量% by weight of 100 parts by weight of the resin component, the antioxidant (c) and/or the benzene-based antioxidant (8) 0. 02~2 parts by weight. 2. The polycarbonate g|resin composition according to the scope of the patent application, wherein the weight average molecular weight of the polycarbonate (A) is 12 〇〇〇 18 〇〇〇. 3. The polycarbonate resin composition according to the first aspect of the invention, wherein the polystyrene resin has a weight average molecular weight of 15 Å to 1 Torr. 4. The polycarbonate resin composition according to the scope of the patent application, wherein the weight average molecular weight of the polystyrene resin (Β) is 2 〇〇〇 4 〇〇〇. 5. The composition ratio of the above-mentioned polystyrene resin of the polycarbonate resin composition of any one of claims 1 to 4, which is based on the above-mentioned resin component, is 1 to 2 weight. %. 6. The polycarbonate resin composition of claim i, wherein the compounding amount of the antioxidant (C) and/or the phenolic antioxidant (D) is 100 parts by weight based on 100 parts by weight of the resin component. It is 0.05 to 0.2 parts by weight. 7. The polycarbonate resin composition according to claim 1, wherein the filling antioxidant (C) is one or more compounds selected from the group consisting of the compounds represented by the following formulas ι, 2 and 3; 097147309 200940624 [Chemical 1] R1—Ο, Μ-〆1 CH0- /0—R3 > R4 (in the formula 1, R1 to R4 represent an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group;) Formula 2 [Chemical 2] Och2 ch2〇\ OP( 〕P〇 ^OCH〆, CH2〇/ (Re)b (In the formula 2, R5 and R6 represent an alkyl group having 1 to 20 carbon atoms or an aryl group substituted with an alkyl group, and a and b represent integers 0 to 3;) (In the formula 3, R7 represents an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and c represents an integer of 0 to 3). 8. The polycarbonate resin composition according to the first aspect of the invention, wherein the phenolic antioxidant (D) is a compound represented by the following formula 4; Formula 4 [Chemical 4] 097147309 20 200940624 (In the formula 4, R8 represents an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group). A molded article for optical molding obtained by molding the polycarbonate resin composition according to any one of claims 1 to 8. ❹ 10. A light guide plate obtained by molding a polycarbonate resin composition according to any one of claims 1 to 8. 097147309 21 200940624 IV. Designated representative map: (1) The representative representative figure of this case is: None (2) The symbol of the symbol of the representative figure is simple: Yiwu. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: No 097147309 2