Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
  • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers

Definitions

• the present invention relates to a polycarbonate resin composition and a molded body using the same. More specifically, by using a biomass material, a polycarbonate resin composition having excellent environmental performance, high fluidity and high impact resistance, excellent heat resistance and flame resistance, and good molded appearance, and use thereof are used. Related to the molded body.
• Polycarbonate resins have excellent mechanical properties such as heat resistance and impact resistance, and are therefore used as materials for various parts in the electric / electronic field, automobile field, and the like.
• a halogen-based flame retardant may be blended.
• a composition in which a biodegradable polyester resin or a naturally derived lignophenol is blended with a polycarbonate resin without using a halogen flame retardant may be used.
• Patent Document 1 discloses that lignophenol is added to a polycarbonate resin to improve fluidity and flame retardancy, but thermal stability is not sufficient, coloring is large, and depending on molding conditions.
• Patent Document 2 describes blending lignophenol into polycarbonate resin and polylactic acid to improve the molding appearance, but describes blending a core-shell type rubber-like elastic body and its effect. Absent. Moreover, the low gloss of the polycarbonate resin and polylactic acid may result in a decrease in physical properties or a decrease in the dispersibility of lignophenol, resulting in a decrease in gloss of the molded product.
• the present invention has a high degree of biomass (vegetation degree) for a composition containing a polycarbonate resin, is excellent in environmental performance such as carbon dioxide emission reduction and fossil raw material reduction, and is flame retardant without using a halogen flame retardant.
• Polycarbonate resin with excellent heat resistance and impact resistance, high fluidity, reduced color tone due to improved thermal stability and poor appearance such as silver, and a molded product with transparency and gloss It aims at providing a composition and a molded object using the same.
• the present inventors have achieved the above object by blending (A) a polycarbonate resin, (B) lignophenol, and (C) a core-shell type rubber-like elastic body at a specific ratio. As a result, the present invention has been completed. That is, the present invention provides the following polycarbonate resin composition.
• R 1 and R 4 represent an alkyl group, an aryl group, an alkoxy group, an aralkyl group or a phenoxy group
• R 2 represents a hydroxyaryl group or an alkyl-substituted hydroxyaryl group
• R 3 represents a hydroxyalkyl group or an alkyl group.
• Group, an aryl group, an alkyl-substituted aryl group or —OR 5 R 5 represents a hydrogen atom, an alkyl group or an aryl group
• R 1 to R 5 other than a hydrogen atom may have a substituent.
• p and q are integers from 0 to 4.
• the plurality of R 1 may be the same or different, and when q is 2 or more, the plurality of R 4 are the same or different. May be. ] 2.
• the present invention has a high degree of biomass (vegetation degree) for a composition containing a polycarbonate resin, is excellent in environmental performance such as carbon dioxide emission reduction and fossil raw material reduction, and is flame retardant without using a halogen flame retardant. It has excellent heat resistance and impact resistance, can be fluidized, reduces color tone changes due to improved thermal stability and appearance defects such as silver, and provides a molded article with transparency and gloss.
• the polycarbonate resin composition of the present invention is a polycarbonate resin composition containing (A) a polycarbonate resin, (B) lignophenol, and (C) a core-shell type rubber-like elastic body.
• A a polycarbonate resin
• B lignophenol
• C a core-shell type rubber-like elastic body.
• the (A) polycarbonate resin may be an aromatic polycarbonate resin or an aliphatic polycarbonate resin, but it is preferable to use an aromatic polycarbonate resin because it is more excellent in impact resistance and heat resistance.
• an aromatic polycarbonate resin usually produced by a reaction between a dihydric phenol and a carbonate precursor can be used.
• the aromatic polycarbonate resin can be a main component of the resin composition because it has better heat resistance, flame retardancy, and impact resistance than other thermoplastic resins.
• dihydric phenol examples include various compounds such as 4,4′-dihydroxydiphenyl; 1,1-bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, And bis (4-hydroxyphenyl) alkanes such as 2,2-bis (4-hydroxyphenyl) propane [bisphenol A]; bis (4-hydroxyphenyl) cycloalkane; bis (4-hydroxyphenyl) oxide; bis (4 -Hydroxyphenyl) sulfide; bis (4-hydroxyphenyl) sulfone; bis (4-hydroxyphenyl) sulfoxide; bis (4-hydroxyphenyl) ketone. Of these, bisphenol A is preferred.
• the dihydric phenol may be a homopolymer using one of these dihydric phenols or a copolymer using two or more. Further, it may be a thermoplastic random branched polycarbonate resin obtained by using a polyfunctional aromatic compound in combination with a dihydric phenol.
• the carbonate precursor include carbonyl halide, haloformate, carbonate ester and the like, and specifically, phosgene, dihaloformate of dihydric phenol, diphenyl carbonate, dimethyl carbonate, diethyl carbonate and the like.
• a terminal terminator can be used as necessary, and examples thereof include a monohydric phenol compound represented by the following general formula (II).
• R 10 represents an alkyl group having 1 to 35 carbon atoms, and a represents an integer of 0 to 5
• a para-substituted product is preferable.
• monohydric phenol compounds include phenol, p-cresol, p-tert-butylphenol, p-tert-octylphenol, p-cumylphenol, p-nonylphenol, and p-tert-amylphenol. it can. These monohydric phenols may be used alone or in combination of two or more.
• the aromatic polycarbonate resin used in the present invention may have a branched structure.
• a branching agent may be used.
• the viscosity average molecular weight of the aromatic polycarbonate resin used in the present invention is preferably 10,000 to 40,000, more preferably 13,000 to 30,000, from the viewpoint of physical properties of the resin composition.
• an aromatic polycarbonate-polyorganosiloxane copolymer or a resin containing an aromatic polycarbonate-polyorganosiloxane copolymer is used so that the flame retardancy and low temperature are reduced.
• the impact resistance can be further improved.
• the polyorganosiloxane constituting the copolymer is more preferably polydimethylsiloxane from the viewpoint of flame retardancy.
• (B) lignophenol has a structure represented by the following general formula (I).
• R 1 and R 4 are alkyl groups (preferably alkyl groups having 1 to 4 carbon atoms, specifically methyl group, ethyl group, propyl group, etc.), aryl groups (preferably carbon atoms).
• an alkoxy group preferably an alkoxy group having 1 to 4 carbon atoms, specifically a methoxy group, an ethoxy group, a propoxy group, etc.
• An aralkyl group preferably an aralkyl group having 12 to 20 carbon atoms, specifically a benzyl group or the like) or a phenoxy group is shown.
• R 2 is a hydroxyaryl group (preferably a hydroxyaryl group having 6 to 14 carbon atoms, specifically 2-hydroxyphenyl group, 3-hydroxyphenyl group, 4-hydroxyphenyl group, etc.) or alkyl-substituted hydroxyaryl Group (preferably a hydroxyaryl group having 7 to 18 carbon atoms, specifically 2-hydroxy-5-methylphenyl group, 3-hydroxy-5-methylphenyl group, 4-hydroxy-5-methylphenyl group, etc.
• R 3 represents a hydroxyalkyl group (preferably a hydroxyalkyl group having 1 to 4 carbon atoms, specifically hydroxymethyl group, hydroxyethyl group, etc.), an alkyl group (preferably having 1 to 4 carbon atoms).
• An alkyl group specifically a methyl group, an ethyl group, a propyl group, or the like) or an aryl group (preferably having 6 to 1 carbon atoms)
• R 5 represents a hydrogen atom, an alkyl group, preferably an alkyl group having 1 to 10 carbon atoms or an aryl group, preferably an aryl group having 6 to 10 carbon atoms).
• R 1 to R 5 other than a hydrogen atom may each have a substituent, and p and q each represents an integer of 0 to 4. However, when p is 2 or more, the plurality of R 1 may be the same or different, and when q is 2 or more, the plurality of R 4 are the same or different. May be.
• the structure represented by the general formula (I) is preferably a naturally derived structure.
• R 1 and R 4 in the above general formula (I) are determined by the tree species, the substituent represented by R 1 and R 4 is a methoxy group, and p and q are each 1 or 2
• R 1 and R 4 are determined by the tree species
• the substituent represented by R 1 and R 4 is a methoxy group
• p and q are each 1 or 2
• softwood is a 3-substituted product with one methoxy group
• broad-leaved trees and herbs are 1: 1 with a 3-substituted product with one methoxy group and two 3,5-substituted products with two methoxy groups.
• a structure that does not have a part of the substituent that is a methoxy group may be included.
• R 3 is a hydroxymethyl group in the naturally derived structure.
• R 2 is a hydroxyaryl group (preferably a hydroxyaryl group having 6 to 14 carbon atoms, specifically 2-hydroxyphenyl group, 3-hydroxyphenyl group, 4 -Hydroxyphenyl group or the like) or alkyl-substituted hydroxyaryl group (preferably a hydroxyaryl group having 7 to 18 carbon atoms, specifically 2-hydroxy-5-methylphenyl group, 3-hydroxy-5-methylphenyl group) , 4-hydroxy-5-methylphenyl group and the like.
• the variation as (C) lignophenol can be increased by freely controlling R 2 of the naturally derived structure.
• the mass average molecular weight of the lignophenol represented by the general formula (I) is preferably 1,000 to 200,000, more preferably 3,000 to 100,000, in terms of polystyrene.
• the both end groups of lignophenol represented by the general formula (I) are preferably phenolic hydroxyl groups, that is, one is a hydroxyl group and the other is a hydrogen atom.
• the lignocresol structure represented, for example by following formula (III) is mentioned.
• Lignophenol is a compound derived from lignin contained in timber, paper, etc., and lignin, for example, acts as an intercellular adhesion substance filled in the gaps of carbohydrates that form the cytoskeleton of trees. is there. Since the structure of lignin is very complex and difficult to use as it is, it is useful to convert it to lignophenol.
• the component (B) of the present invention can be obtained by adding a phenol derivative to a lignocellulosic material such as wood or paper and then hydrolyzing it with an acid to separate it into lignophenol and a carbohydrate.
• the component (B) includes an alkali-treated derivative of the above lignophenol, or a derivative in which the hydroxyl group in the above-mentioned lignophenol or the above-mentioned alkali-treated derivative of lignophenol is protected.
• lignocellulosic substances include wooded materials, various materials mainly wood, such as wood flour, chips, waste materials, and mill ends. Moreover, as wood to be used, any kind of wood such as conifers and hardwoods can be used. Furthermore, various herbaceous plants and related samples such as agricultural wastes can be used. When lignophenol is separated using these materials, those obtained without heating and pressurization in the separation process are preferably used.
• a monovalent phenol derivative a divalent phenol derivative, a trivalent phenol derivative, or the like
• the monovalent phenol derivative include phenol, naphthol, anthrol, anthroquinoneol and the like, and each may have one or more substituents.
• the divalent phenol derivative include resorcinol, hydroquinone and the like, each of which may have one or more substituents.
• the trivalent phenol derivative include pyrogallol and the like, which may have one or more substituents.
• those including those other than those mentioned above such as hydroxyanthracene, methoxyphenol (mono-di-tri), methylcatechol, biphenyl, dimethylhydroxyaryl, trimethylhydroxyaryl, etc. can also be used as the phenol derivative.
• the type of substituent that the phenol derivative may have is not particularly limited, and may have any substituent, but is preferably a group other than an electron-withdrawing group (such as a halogen atom),
• an alkyl group methyl group, ethyl group, propyl group, etc.
• an alkoxy group methoxy group, ethoxy group, propoxy group, etc.
• an aryl group phenyl group etc.
• Particularly preferred examples of phenol derivatives are cresol, in particular m-cresol or p-cresol.
• an acid having swelling property with respect to cellulose is preferable.
• the acid include sulfuric acid having a concentration of 65% by mass or more (for example, 72% by mass sulfuric acid), 85% by mass or more of phosphoric acid, 38% by mass or more of hydrochloric acid, p-toluenesulfonic acid, trifluoroacetic acid, Examples thereof include trichloroacetic acid and formic acid.
• Examples of the method for extracting and separating lignophenol obtained as described above include the following two methods.
• the first method is the method described in Japanese Patent No. 2895087. Specifically, lignin is solvated into a phenol derivative by infiltrating a lignocellulosic material such as wood flour, and then concentrated acid is added to dissolve the lignocellulosic material. At this time, the cation at the side chain ⁇ -position of the lignin basic structural unit is attacked by the phenol derivative, and lignophenol in which the phenol derivative is introduced at the benzyl position is generated in the phenol derivative phase. And it is the method of extracting lignophenol from a phenol derivative phase.
• the precipitate obtained by adding the phenol derivative phase to a large excess of ethyl ether is collected and dissolved in acetone.
• the acetone insoluble part is removed by centrifugation, and the acetone soluble part is concentrated.
• the acetone soluble part is dropped into a large excess of ethyl ether, and the precipitate section is collected.
• the crude lignophenol can be obtained by simply removing the phenol derivative phase by distillation under reduced pressure.
• an acetone soluble part can also be used for a derivatization process (alkali process) as a lignophenol solution as it is.
• the second method is a method described in Japanese Patent Laid-Open No. 2001-64494. Specifically, a lignocellulosic material is infiltrated with a solvent in which a solid or liquid phenol derivative is dissolved, and then the solvent is distilled off (phenol derivative sorption step). Next, a concentrated acid is added to this lignocellulosic material to dissolve the cellulose component, and lignophenol is produced in the phenol derivative phase and the lignophenol is extracted as in the first method. Extraction of lignophenol can be performed in the same manner as in the first method. Alternatively, as another extraction method, the entire reaction solution after the concentrated acid treatment is put into excess water, insoluble sections are collected by centrifugation, deoxidized and dried. Acetone or alcohol is added to the dried product to extract lignophenol. Further, as in the first method, this soluble segment is dropped into excess ethyl ether or the like to obtain lignophenol as an insoluble segment.
• the second method is the latter extraction method, in particular, the method of extracting and separating lignophenol with acetone or alcohol, the amount of phenol derivative used is It is economical because it requires less. Moreover, since this method can process many lignocellulosic materials with a small amount of a phenol derivative, it is suitable for large-scale synthesis of lignophenol.
• the component (B) of the present invention obtained by the above method generally has the following characteristics.
• the characteristics of the component (B) used in the present invention are not limited to the following.
• (1) The mass average molecular weight is about 1,000 to 200,000.
• the component (B) obtained by the above method can be used after being derivatized by further alkali treatment.
• Lignophenol obtained from natural lignin by a phase separation process is stable as a whole because the ⁇ -position of its activated carbon is blocked with a phenol derivative.
• the phenolic hydroxyl group readily dissociates under alkaline conditions, and the resulting phenoxide ion attacks the ⁇ -position of the adjacent carbon when it is sterically possible.
• the ⁇ -position aryl ether bond is cleaved, the lignophenol is reduced in molecular weight, and the phenolic hydroxyl group in the introduced phenol nucleus moves to the lignin matrix.
• the alkali-treated derivative is expected to have improved hydrophobicity compared to lignophenol before the alkali treatment.
• the alkoxide ion present in the carbon at the ⁇ -position or the carbanion of the lignin aromatic nucleus is also expected to attack the ⁇ -position, but this requires much higher energy than the phenoxide ion. Therefore, the adjacent group effect of the phenolic hydroxyl group of the introduced phenol nucleus preferentially appears under mild alkaline conditions, and further reaction occurs under severer conditions, and the phenolic hydroxyl group of the once etherified cresol nucleus is regenerated. As a result, it is expected that lignophenol is further reduced in molecular weight and hydrophilicity is increased by increasing the number of hydroxyl groups.
• lignophenol and lignophenol derivatives obtained by alkali treatment thereof have various characteristics due to the presence of phenolic and alcoholic hydroxyl groups.
• a derivative having different characteristics can be obtained.
• Examples of the method for protecting the hydroxyl group include protecting the hydroxyl group with a protecting group such as an acyl group (eg, acetyl group, propionyl group, benzoyl group).
• a protecting group such as an acyl group (eg, acetyl group, propionyl group, benzoyl group).
• (C) Core-shell type rubber-like elastic body has a two-layer structure composed of a core and a shell, and the core portion is in a soft rubber state and its surface The shell portion is in a hard resin state, and the elastic body itself is in a powder form (particle state). Even after this rubber-like elastic body is blended with the polycarbonate resin, the particle state is mostly maintained in the original form, so that the effect of not causing the surface layer peeling after molding is obtained.
• the core-shell type rubber-like elastic body that can be used as the component (C) various materials can be exemplified. Examples thereof include those obtained by polymerizing one or more vinyl monomers in the presence of a rubbery polymer obtained from a monomer mainly composed of alkyl acrylate, alkyl methacrylate, or dimethylsiloxane. It is done.
• alkyl acrylate or alkyl methacrylate those having an alkyl group having 2 to 10 carbon atoms are suitable. Specific examples include ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, n-octyl methacrylate, and the like.
• Examples of the rubbery polymer obtained from a monomer mainly composed of these alkyl acrylates include 70% by mass or more of alkyl acrylates and other vinyl monomers copolymerizable therewith, such as methyl methacrylate and acrylonitrile. , A polymer obtained by reacting 30% by mass or less of vinyl acetate, styrene and the like.
• a polyfunctional monomer such as divinylbenzene, ethylene dimethacrylate, triallyl cyanurate, triallyl isocyanurate or the like may be appropriately added as a crosslinking agent for reaction.
• vinyl monomers to be reacted in the presence of a rubbery polymer examples include aromatic vinyl compounds such as styrene and ⁇ -methylstyrene, acrylic acid esters such as methyl acrylate and ethyl acrylate, methyl methacrylate, And methacrylates such as ethyl methacrylate. These monomers may be used alone or in combination of two or more, and other vinyl polymers such as vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, vinyl acetate, propionic acid, etc. You may make it copolymerize with vinyl ester compounds, such as vinyl.
• This polymerization reaction can be performed by various methods such as bulk polymerization, suspension polymerization, and emulsion polymerization. In particular, the emulsion polymerization method is suitable.
• the core-shell type rubber-like elastic body thus obtained preferably contains 20% by mass or more of the rubber-like polymer.
• a core-shell type rubber-like elastic body include MAS resin elastic bodies such as a graft copolymer of 60 to 80% by mass of n-butyl acrylate, styrene, and methyl methacrylate.
• commercially available MAS resin elastic bodies include Hybrene B621 (trade name, manufactured by Nippon Zeon Co., Ltd.), KM-330 (trade name, manufactured by Rohm & Haas Co., Ltd.), Metabrene W529, Metabrene S2001, Metabrene C223, Metabrene.
• the core-shell type rubber-like elastic body is disclosed in JP-A-59-93748, and the acrylate-based core-polymerized acrylate shell polymer disclosed in the same publication can be suitably used in the present invention.
• the (C) core-shell type rubber-like elastic body used in the present invention preferably has a reactive group.
• the reactive group include an epoxy group, a glycidyl group, a carboxyl group, a hydroxyl group, an amino group, and a vinyl group.
• the core-shell type rubber-like elastic body having a glycidyl group is particularly effective for preventing coloring.
• a core-shell type rubber-like elastic body having a glycidyl group there is “Metabrene S2200” manufactured by Mitsubishi Rayon Co., Ltd.
• a blending ratio of (A) polycarbonate resin, (B) lignophenol and (C) core-shell type rubber-like elastic body is a resin mixture comprising 99 to 60% by mass of component (A) and 1 to 40% by mass of component (B).
• the component (C) is 1 to 30 parts by mass with respect to 100 parts by mass.
• the component (A) is 90 to 70% by mass
• the component (B) is 10 to 30% by mass
• the component (A) is 95 to 70% by mass
• the component (B) is 5 to 30% by mass.
• the component (B) is less than 1% by mass
• the flame retardancy and fluidity cannot be improved, and when it exceeds 50 parts by mass, the fluidity becomes extremely high, so that the moldability is deteriorated and the molding is not performed. Since it becomes difficult, it is not preferable.
• the component (C) is less than 1 part by mass, the impact strength and the molded appearance are not improved, and when it exceeds 30 parts by mass, the fluidity is lowered and the molded appearance is not improved.
• the amount is preferably 3 to 20 parts by mass.
• the polycarbonate resin composition of the present invention may contain an additive component as necessary in addition to the components (A) to (C).
• an additive component for example, phenol-based, phosphorus-based, sulfur-based antioxidants, antistatic agents, polyamide polyether block copolymers (permanent antistatic performance imparted), benzotriazole-based or benzophenone-based UV absorbers, hindered amine-based light stabilizers (Weathering agent), antibacterial agent, compatibilizer, colorant (dye, pigment) and the like.
• the amount of additive component added is not particularly limited as long as the properties of the polycarbonate resin composition of the present invention are maintained.
• the polycarbonate resin composition of the present invention can be obtained by blending the components (A) to (C) in the above proportions, and adding the additive components used as necessary in an appropriate proportion and kneading. Mixing and kneading at this time are premixed with a commonly used equipment such as a ribbon blender, a drum tumbler, etc., then a Henschel mixer, a Banbury mixer, a single screw extruder, a twin screw extruder, a multi screw extruder. This method can be performed by a method using a machine and a conider.
• the heating temperature at the time of kneading is usually appropriately selected within the range of 240 to 300 ° C.
• the polycarbonate resin composition of the present invention is obtained by using the above melt-kneading molding machine or the obtained pellet as a raw material, an injection molding method, an injection compression molding method, an extrusion molding method, a blow molding method, a press molding method, a vacuum molding method.
• Various molded bodies can be produced by a foam molding method or the like.
• the above-mentioned melt-kneading method can be used to produce a pellet-shaped molding raw material, and then use the pellet to suitably produce an injection-molded body by injection molding or injection compression molding.
• the present invention also provides a molded article obtained by molding the above-described polycarbonate resin composition of the present invention.
• a molded article formed by molding the polycarbonate resin composition of the present invention preferably an injection molded article (including injection compression), a copying machine, a fax machine, a television, a radio, a tape recorder, a video deck, a personal computer, a printer, a telephone, Used for OA equipment such as information terminals, refrigerators, microwave ovens, home appliances, housings and various parts of electrical / electronic equipment.
• the oxygen index is a value indicating the minimum oxygen concentration necessary for the test piece to maintain combustion in terms of volume% in air.
• Yellowness (YI value) Measurement was performed with a spectrophotometer ⁇ 90 manufactured by Nippon Denshoku Industries Co., Ltd., with a measurement area of 30 ⁇ and a C2 light source transmission method.
• each component used in each example is as follows.
• (A) Polycarbonate resin Aromatic polycarbonate resin: Product name Toughlon A1900 [manufactured by Idemitsu Kosan Co., Ltd., viscosity average molecular weight 19,500]
• Core shell type rubber elastic body [Mitsubishi Rayon Co., Ltd.] trade name C223 Reaction type (glycidyl group) core-shell type elastic rubber: [Mitsubishi Rayon Co., Ltd.] trade name S2200 ⁇
• SBS Styrenic thermoplastic elastomer
• Examples 1 to 5 and Comparative Examples 1 to 4 The above components were blended in the proportions shown in Table 1, supplied to an extruder (model name: VS40, manufactured by Tanabe Plastic Machinery Co., Ltd.), melt-kneaded at 240 ° C., and pelletized.
• 0.2 parts by mass of Irganox 1076 manufactured by BASF
• Adekastab C manufactured by ADEKA
• the obtained pellets were dried at 120 ° C.
• Table 1 shows the following. Examples 1 to 5 Addition of (B) lignophenol and (C) core-shell type rubbery elastic body to (A) polycarbonate resin gives excellent fluidity, impact resistance, heat resistance and flame retardancy, low yellowness, and molded appearance A good polycarbonate resin composition can be obtained.
• (C) a core-shell type rubbery elastic body using a reactive core-shell type rubbery elastic body having a glycidyl group has high impact resistance and a remarkable reduction in yellowness.
• Comparative examples 1 to 4 If the core-shell type rubber-like elastic body is not used, the impact resistance is lowered, the yellowness is high, silver is generated and the appearance is poor (Comparative Example 1), (C) instead of the core-shell type rubber-like elastic body In the case of using a styrene-based thermoplastic elastomer, (B) the dispersibility of lignophenol is lowered, the impact resistance is low, and the appearance is poor due to the occurrence of bumps during molding (Comparative Example 4), (B ) If the blending amount of lignophenol is too large, molding becomes difficult and injection molding cannot be performed (Comparative Example 2). Moreover, when there are too many compounding ratios of (C) core-shell type rubber-like elastic body, fluidity
• the polycarbonate resin composition of the present invention can be suitably used as various materials in electronic / electrical equipment, information / communication equipment, OA equipment, automobile field, building material field, and the like.

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