TW201125923A - Polycarbonate resin composition - Google Patents

Abstract

Disclosed is a polycarbonate resin composition that has excellent thin-walled flame retardance, heat conductivity, mold release characteristics, and impact properties, and that comprises (A) an aromatic polycarbonate resin, every 100 masses of which is combined with (B) 28-90 masses of graphite and (C) 9-20 masses of polytetrafluoroethylene.

Description

201125923 VI. Description of the Invention: [Technical Field] The present invention relates to a polycarbonate resin composition and a molded body comprising the same, especially for a thin wall flame retardant and heat conductive A polycarbonate resin composition excellent in moldability, such as properties, impact properties, fluidity, and mold release property, and a molded article comprising the same. [Prior Art] In the development of products in the field of electric and electronic products, with the high pixelization and high-speed processing of digital cameras and digital cameras, the miniaturization of projectors, the high-speed processing of computers and mobile devices, and the LEDs of various light sources (Light Emitting Diode 'Light Emitting Diodes' has been focused on heat dissipation measures. In addition, in the case of a miniaturized machine, the heat dissipation circuit is complicated. Therefore, it is required to integrate the resin case and the heat dissipation circuit, and it is excellent in thermal conductivity and is used as a casing. A resin material that is also excellent in mechanical strength. Further, in a small electronic device, the casing and the bottom plate are required to be thinned, and the flame retardancy of the thin-walled molded body is also required. The general-purpose polycarbonate resin in the casing of the above-mentioned electronic device, as a method for improving the flame retardancy of the polycarbonate resin, can use a halogenated double together with a flame retardant auxiliary such as an oxidation record in terms of flame retardant efficiency. A tooth-based flame retardant such as age a or halogenated polycarbonate oligomer. However, in recent years, in terms of safety, waste, and environmental impact at the time of incineration, there is a demand for a flame-retardant method using a flame retardant containing no phenol. When an organic phosphorus-based flame retardant, particularly an organic phosphate compound, which is the above non-dentate-based flame retardant, is blended in a polycarbonate resin composition, 151934.doc 201125923, it exhibits excellent flame retardancy, and It has the function as a plasticizer, but it must be formulated in a relatively large amount. Further, since the polycarbonate resin has a high molding temperature and a high melt viscosity, the molding temperature tends to increase. The phosphate compound generally contributes to flame retardancy, but there are cases where the mold is corroded during molding, gas is generated, and the molding environment or the appearance of the molded article is not necessarily sufficient. Further, it is pointed out that the impact strength of the molded article is lowered when the molded article is placed in a high temperature environment, and discoloration occurs. Further, in response to the demand for reuse in the recent resource recycling, problems such as difficulty in reuse due to insufficient thermal stability are left. Therefore, it has been desired to find a polycarbonate resin composition which is excellent in thermal conductivity without using a functional compound or a phosphate compound as a flame retardant to achieve flame retardancy of a desired thin-walled molded article. A method of blending graphite is known as a method of imparting heat dissipation to a thermoplastic resin such as a polycarbonate resin (see Patent Document 1 and Patent Document 2). Patent Document 1 discloses that a thermoplastic resin composition having less corrosion property and excellent thermal conductivity can be obtained by blending a specific graphite with a thermoplastic resin, but it is preferably used for improving flame retardancy. An organic tooth-based flame retardant or a acid-based flame retardant such as a toothed carbonate conjugate or a phthalocyanine compound does not disclose the use of a gas-based flame retardant, a bromine-based flame retardant, and a phosphorus system. Flame retardant technology. Further, in Patent Document 2, the heat-dissipating casing accommodating the heat generating body has been described, but the flame retardancy required for the casing of an electronic device or the like has not been described, and an additive which is blended as needed, reveals an organic bromine system. Flame retardant or phosphorus 151934.doc 201125923 is a flame retardant such as a flame retardant, but does not disclose the technology of actively using no gas-based flame retardant, broad-based flame retardant and glass-based flame retardant. In the examples thereof, since the flame retardant and the anti-drip agent are not added, sufficient flame retardancy is not obtained. Further, 'Patent Document 3' discloses a technique of actively using a chlorine-based flame retardant, a bromine-based flame retardant, and a phosphorus-based flame retardant, and discloses a polycarbonate resin, graphite, and an organic sulfonic acid alkali (earth). In the flame retardancy evaluation of the metal salt, only the molded body having a thickness of 2.5 mm was evaluated, and the wall thickness of about 15 mm required for the casing of an electronic device or the like was not obtained. Flame retardant. Further, Patent Document 3 describes a case where a fluorine-containing anti-drip agent is contained, and it is described that the anti-melt dripping effect and the flow characteristics are simultaneously achieved, and the blending amount is preferably 〇 5 parts by mass. CITATION LIST Patent Literature Patent Literature 1: JP-A-2007-31611 Patent Document 2: Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION An object of the present invention is to provide a flame-retardant (thickness of 12 to 丨〇 mm) of a thin-walled molded body without using a gas-based flame retardant, a bromine-based flame retardant, and a phosphorus-based flame retardant. A polycarbonate resin composition which is excellent in moldability, such as V-0 to ν-1 'hereinafter referred to as "thin-wall flame retardancy"), and which has high thermal conductivity and excellent impact properties, fluidity, and mold release property, and a molded article thereof . 151934.doc 201125923 Technical means for solving the problem The intent of the four people of the present invention has repeatedly studied in order to achieve the above purpose, and as a result, it has been found that the amount of graphite is more than that which is usually used as an anti-drip agent by blending graphite in an aromatic polycarbonate resin. The polytetrafluoroethylene is a polycarbonate resin composition which is excellent in thin-wall flame retardancy and further excellent in moldability such as thermal conductivity, impact properties, fluidity, and mold release property, and has completed the present invention. In other words, the present invention provides the following: (1) A polycarbonate resin composition comprising 28 to 90 parts by mass of graphite, and (c) poly(100) by mass based on 100 parts by mass of the (A) aromatic polycarbonate resin. (2) The polycarbonate resin composition of the above (1), which further comprises an organic base (earth) metal salt of 0.1 to 5 parts by mass; (3) as described above (1) Or (2) a polycarbonate resin composition, wherein the graphite is natural graphite; (4) the polycarbonate resin composition according to (1) or (2) above, wherein the graphite in the pot is artificial graphite; (5) The polycarbonate resin composition according to the above (2), wherein the organic metal salt and/or the organic alkaline earth metal salt is selected from the group consisting of alkali metal sulfonates, acid-recovery metal salts, and polyphenylene acid metal salts. And (6) a polycarbonate resin composition according to the above (5), wherein the acid-recovering metal salt is sodium p-toluenesulfonate; (7) a molded body comprising the polycarbonate resin composition according to any one of the above (1) to (6); 151934.doc 201125923 (8) as described above (7) (1) The molded article according to (7) above, which is a molded case for an electric or electronic device; (1) the molded body according to the above (7), which is electrically , the bottom plate for electronic equipment. Advantageous Effects of Invention According to the present invention, it is possible to obtain a resin composition and a molding which are excellent in moldability such as thin-wall flame retardancy, thermal conductivity, fluidity, and mold release property without impairing the original mechanical properties of the polycarbonate resin. body. [Embodiment] Hereinafter, the present invention will be described in detail. The polycarbonate resin (hereinafter sometimes abbreviated as "pc resin") composition of the present invention contains (A) an aromatic polycarbonate resin, (B) graphite, and (c) polytetrafluoroethylene as essential components. The aromatic polycarbonate resin used as the component (A) in the present invention is not particularly limited, and various examples thereof can be used. Generally, an aromatic polycondensation produced by a reaction between a binary expectant and a carbonate precursor can be used. Carbonate. For example, it can be produced by reacting a dihydric phenol with a carbonic acid-cured precursor by a solution method or a melt method, and specifically, a reaction of a binary age and phosgene, a dihydric phenol and a diphenyl carbonate can be used. The manufacturer of the transesterification reaction. • As the dihydric phenol, various examples can be mentioned, for example, 2,2_bis(4-hydroxy'^phenyl)propane [bisphenol A], bis(4-hydroxyphenyl)methane, and bis (4) _hydroxyphenyl)ethene, 2,2-bis(4-carbazhen-3,5-dimethylphenyl)propene, m-diphenyl, bis(4-phenyl)cyclohexane, Bis(4-p-phenyl)thio, bis(4-phenylphenyl) hard, bis(4-phenylphenyl) sub-bowl, bis(4-phenyl)phenyl, double (4- Hydroxyphenyl) ketone and the like. 151934.doc 201125923 Among these, the dihydric phenols of the stalks ‘, , , and ′′ are bis(hydroxyphenyl)alkane, especially bisphenol A as the main raw material. Further, examples of the dihydric phenol include hydroquinone, resorcin, and phthalic acid. The binary materials are prepared separately or in combination with two types. The same can be used together with the above-mentioned binary to make appropriate branching agents, : 11?1_ tris(tetra)phenyl) (4) phenyl phenyl triisopropyl " [mercapto α-(4 hydroxyphenyl)ethyl]-4-[α',α'-bis(4"-pyridyl)ethyl]benzene, Stupid three, drum red (next to neighbors) and so on. ^ As a carbon ^Sa rigid drive, it is carbon 醯 i, sulfhydryl s or i formic acid s, etc., the body can be cited phosgene, binary didentate formic acid vinegar, diphenyl carbonate, dimethyl carbonate , diethyl carbonate, and the like. The molecular weight modifier "as a molecular terminal group in the PC resin used as the component (4)" may be any one which is usually used for polymerization of polycarbonate, and various phenols may be used. Specific examples thereof include phenol, p-cresol, p-butylphenol, p-tert-octylbenzene, p-cumylphenol, bromide, tribromophenol, nonylphenol and the like. In the PC resin composition of the present invention, in addition to the above aromatic pc resin, a polycarbonate having a polyorganosiloxane portion may be appropriately contained within a range not detracting from the object of the present invention. Polyester-polycarbonate resin 4 copolymerized resin obtained by polymerizing polycarbonate in the presence of an ester precursor such as a difunctional carboxylic acid such as phenyl-f-acid or an ester-forming derivative thereof Or other polycarbonate resin. In the aspect of obtaining a high impact strength, 151934.doc 201125923 used in the present invention preferably has a raw material molecular weight (viscosity average molecular weight) [^^] of 17,000 to 30,000. Here, in the case where natural graphite is used as the (B) graphite described below, it is preferable that the raw material molecular weight (viscosity average molecular weight) [Mv] is 1 M00 to 26,000 in terms of moldability and impact strength. In the case of using artificial graphite, it is preferably 18'500 to 23, and if the molecular weight is too high, the flame retardancy tends to be lowered. The viscosity average molecular weight (Mv) was measured by using a Ukrainian viscometer and measuring the viscosity of the next methyl chloride solution to determine the ultimate viscosity [η], which was calculated by the following formula. In the polycarbonate resin composition of the present invention, graphite which is a (ruthenium) component is mainly used to impart thermal conductivity. As the graphite, any of natural graphite or various artificial graphite can be used. Any of graphite, scaly graphite (also referred to as Vem of bulk graphite, and Me Graphite). Among the natural graphites exemplified above, flaky graphite can be preferably used. Ink can obtain higher thermal conductivity and higher modulus of elasticity. Artificial stone 4 series heat treatment of amorphous carbon and the orientation of tiny graphite crystals arranged irregularly by humans, except for carbon materials In addition to artificial graphite, it also includes condensed graphite, decomposed graphite, and thermally decomposed graphite. The artificial graphite of carbon material can be produced by graphitization using petroleum-like coke or coal-based asphalt ruthenium as the main raw material. Compared with the above-mentioned natural graphite, the artificial graphite has a low modulus of curvature and a low heat conductivity of 151934.doc -9-201125923, but has the advantage of obtaining a higher welding strength. (B) The amount of the composition is relatively The amount of the above-mentioned (A) component is required to be in the range of 28 to 90 parts by mass, preferably in the range of 3 to 7 parts by mass. If the amount is less than 28 parts by mass, it is difficult to obtain sufficient content. When the thermal conductivity is more than 90 parts by mass, the impact strength is likely to be lowered. When the resin composition is blended with 40 to 60 parts by mass of the above natural graphite, the effect of improving the flame retardancy is remarkable, and the thin wall is thin. (Evaluation of the flame retardancy of the thickness (ul standard 94) can achieve V-0. In the present invention, as for the particle diameter of graphite, it is preferable to use a 〇% cumulative particle diameter of 30 to 180 μπι. The amount of carbon is preferably 8% by weight or more, more preferably 90% by weight or more, and particularly preferably 98% by weight or more. Further, the volatile component of the graphite of the present invention is preferably 3% by weight or less, more preferably 5% by weight or less. In the following, it is particularly preferably 1% by weight or less. The surface may be subjected to a surface treatment such as epoxy, urethane treatment, Shixiayuan coupling treatment, and the like in order to increase the affinity with the thermoplastic resin without impairing the characteristics of the composition of the present invention. Treatment, etc. In the polycarbonate resin composition of the present invention, (C) polytetrafluoroethylene (PTFE) is formulated to improve flame retardancy. The component (c) imparts an anti-melt dripping effect to the resin composition of the present invention. (C) component is preferably a fiber-forming ability. The term "fiber forming ability" means that the resin is bonded to each other to form a fiber by an external force such as shearing force. The component (c) of the present invention may, for example, be a polytetrafluoroethylene or a tetrafluoroethylene copolymer (for example, a tetrafluoroethylene/hexafluoropropylene 151934.doc-10-201125923 copolymer or the like). Among these, polytetrafluoroethylene is preferred. The PTFE having fiber forming ability has an extremely high molecular weight, and the number average molecular weight calculated based on the specific gravity is usually 500,000 or more, preferably 500,000 to 15,000,000, more preferably 1,000,000 to 10,000,000. Specifically, in the aqueous solution, the temperature of 〇~200〇c can be lowered under the pressure of about 7~700 kPa under sodium peroxodisulfate or peroxodisulfate or under pressure of about 7~700 kPa, 20 〜l〇(Rc is obtained by polymerizing tetrafluoroethylene at rC. In addition to the solid shape, an aqueous dispersion may be used, and it may be classified into type 3 according to the ASTM standard. For example, "Tefl〇n 6_j" (product name, PONT-MITSUI FLUOR〇CHEMICALS), "p. Cangzhou (10) Di" and "PolyflonF_1〇3" [product name, large In addition to the type 3, "Algoflon F5" [product name, manufactured by S〇lvay sows company], and "Polyfl〇n mpafa i〇〇" [product name Daikin Industries] The above-mentioned PTFE may be used alone or in combination of two or more kinds. The amount of the component (c) is required to be 9 to 20 mass% based on 1 part by mass of the component (A). The range of parts is preferably from 1 〇 to 18 parts by mass. If the amount is less than 9 mass damage, then no When the thickness is more than 2 parts by mass, the flow characteristics of the molten resin composition are lowered, and the formability is deteriorated. Compared with the amount of ptfe which is usually formulated as an anti-drip agent (usually 0.5 of the entire resin composition) The amount of the mass% or less is less than the range of the above-mentioned blending amount. In addition to the thin-wall flame retardancy, the dynamic friction coefficient is also lowered, so that the demolding effect at the time of molding is improved. 151934.doc 201125923 When the amount of the ink of the component (B) is 28 to 90 parts by mass and the component (C) is 9 to 2 parts by mass based on 100 parts by mass of the component (A), the shell, J is usually used for the PC resin. The flame retardant, for example, the following organic alkali (earth) metal salt, and the flame retardancy evaluation (UL standard 94) of the thin wall (thickness: 1.2 mm) can also achieve V". To further improve the polycarbonate resin of the present invention. The thin-wall flame retardancy of the composition is preferably formulated as (D) an organic alkali metal salt and/or an organic alkaline earth metal salt. As the organic alkali metal salt and/or the organic alkaline earth metal salt, various kinds may be used, and at least one carbon may be used. Atomic An alkali metal salt of an organic acid or an organic acid ester and an organic alkaline earth metal salt. Here, the organic acid or organic acid ester is an organic sulfonic acid, an organic carboxylic acid, etc. On the other hand, the alkali metal is lithium, sodium, potassium, planing, etc. The alkaline earth metal is magnesium, calcium, barium, strontium, etc., among which sodium or potassium salt can be preferably used. Further, the salt of the organic acid can also be substituted by a substance such as fluorine, chlorine or bromine. The salt and the organic alkaline earth metal salt may be used alone or in combination of two or more. Among the above various organic alkali metal salts and organic alkaline earth metal salts, for example, in the case of an organic sulfonic acid, p-toluenesulfonic acid, 2 , 5_diqibenzenesulfonic acid; 2'4,5-trisbenzenesulfonic acid; diphenylsulfone_3_sulfonic acid; diphenylsulfone_3,3,-disulfonic acid; naphthalene trisulfonic acid, etc. An alkali metal salt of an organic sulfonic acid or the like. Further, examples of the organic carboxylic acid include perfluorodecanoic acid, perfluoromethanecarboxylic acid, perfluoroethanecarboxylic acid, perfluoropropane decanoic acid, perfluorobutanecarboxylic acid, perfluoromethylbutane decanoic acid, and perfluorocarbon. As the hexanecarboxylic acid, perfluoroheptanecarboxylic acid, perfluorooctanoic acid, or the like, an alkali metal salt of these organic carboxylic acids can be used. Then, 'the alkali metal salt of polystyrenesulfonic acid and/or the soil-measuring metal salt which can be used for the component (D)' can be used as the sulfonate group represented by the following formula (1) 151934.doc -12 - 201125923 Aromatic vinyl resin. [Chemical 1]

In the above formula (1), 'Z1 represents a sulfonate group, and z2 represents a hydrogen atom or a hydrocarbon group having a carbon number of 〜~". g is an integer of 1 to 5. h represents a molar fraction, and here, 'sulfonate The base is a sulfonic acid alkali metal salt and/or an alkaline earth metal salt, and examples of the metal 'sodium, potassium, lithium, cesium, rubidium, cesium, magnesium, mother, pin, hydrazine, etc., wherein Z2 is a hydrogen atom or carbon a hydrocarbon group of 丨~(7), preferably a hydrogen atom or a methyl group, and 'g is an integer of 1 to 5'! ^0<hs i. That is, the acid group (f) is relative to the aromatic ring. In order to further improve the effect of the thin-wall flame retardancy of the polycarbonate resin composition of the present invention, the content of the sulfonate group-containing aromatic vinyl resin may be considered. The substitution ratio of the acid salt group is usually substituted with 丨〇~1. Further, among the alkali metal salts and/or alkaline earth metal salts of polystyrene sulfonic acid, the sulfonate group-containing aromatic vinyl resin is not The polystyrene resin limited to the above formula (1) may be a copolymer of a styrene monomer and another monomer copolymerizable. In the method for producing an aromatic vinyl-based resin containing a sulfonate group, (1) polymerizing the above aromatic vinyl monomer having a repeating acid group or the like, I51934.doc -13-201125923 or such aroma a method of copolymerizing a group of vinyl monomers with another monomer copolymerizable; (π) a copolymer of an aromatic vinyl polymer or an aromatic vinyl monomer with another copolymerizable monomer, or The mixed polymer is subjected to sulfonation, neutralized by an alkali metal compound and/or an alkaline earth metal compound, etc. For example, as the method of the above (11), by the use of a polystyrene resin, 2 Adding a mixture of concentrated sulfuric acid and acetic anhydride to the dichloroethane solution, heating and reacting for several hours to produce a polystyrene sulfonate. Then, the hydrogen hydride is dehydrogenated with the sulfonic acid group. The sodium oxyhydroxide is neutralized, whereby a poly(vinyl ether) acid salt or a sodium salt can be obtained. The weight average molecular weight of the sulfonate group-containing aromatic vinyl resin used in the present invention is 1,000 to 3 〇〇, _ around 'better 2, _ In addition, the weight average molecular weight can be measured by a GPC (Gel Permeatiation Chromatography) method. The above (D) component may be used alone or in combination of two or more. In addition, the content is preferably 〇1 to 〇5 parts by mass, and preferably 0.2 to 0.4 parts by mass, based on 100 parts by mass of the component (A). When the content is 〇1 part by mass or more, thin-wall flame retardancy is observed. The effect of the improvement is 5 parts by mass or less to ensure thermal stability. In addition, in the polysulfide resin composition of the present invention, in order to improve moldability, impact resistance, appearance, weather resistance, rigidity, and the like, The phenol-based, phosphorus-based, sulfur-based (E) antioxidant, and (F) release agent may be contained in addition to the essential components of the above (A) to (c) and, if necessary, the component (D). 151934.doc -14· 201125923 Regarding the amount of the (E) antioxidant, the phosphorus-based antioxidant is preferably 0.001 to 0.5 parts by mass. If it is 0 001 parts by mass or more, the thermal stability in the granulation step and the molding step can be maintained, and if it is less than 0.5 part by mass, it is difficult to cause a decrease in molecular weight. Further, the phenolic antioxidant is preferably added in an amount of 0.001 to 0.5 parts by mass. The impact strength is easily improved. The release agent (F) is not particularly limited as long as it is blended in a polycarbonate resin to improve the mold release property at the time of forming. In particular, beeswax, glyceryl monostearate, glyceryl tristearate, pentaerythritol monostearate, pentaerythritol tristearate, pentaerythritol tetrastearate, montan acid ester wax, carboxylate and other organic compounds For example, "Rikemal S-100A" and "Rikemal SL" manufactured by "Beeswax Golden Brand"' Riken Vitamin Co., Ltd., manufactured by Miki Chemical Industry Co., Ltd., can be preferably used. -900", and "Rikester EW-440A", Cognis

"Loxiol VPG861" manufactured by Japan Corporation, "Licowax E" manufactured by Clariant japan, "[οχί〇ι EP_32"β manufactured by Cognis Japan Co., Ltd. is preferably 0.001 to 2 parts by mass. Further, other synthetic resins, elastomers, and additives commonly used in thermoplastic resins may be contained as needed. Examples of the above additives include an antistatic agent, a polyamide polyether block copolymer (providing permanent antistatic properties), a stupid triazole or benzophenone ultraviolet absorber, and a hindered amine light stabilizer ( Weathering agent), plasticizer, antibacterial agent, phase solvent and coloring agent (dye, pigment), etc. The amount of the above-mentioned optional component is not particularly limited as long as it can maintain the properties of the polycarbonate resin composition of the present invention. Next, the method for producing the polycarbonate resin composition of the present invention is described in 151934.doc 15 201125923. In the polycarbonate resin composition of the present invention, the above-mentioned components (A) to (C) and, if necessary, the component (D) can be blended in the above ratio, and various optional components which are optionally used can be blended in an appropriate ratio, and Obtained by mixing. The blending and kneading can be carried out by using a commonly used machine such as a belt mixer, a political drum, etc., and using a Henschel mixer, a Banbury mixer, a single screw extruder, a twin screw extruder, and the like. It is carried out by a method such as a screw extruder and a two-way kneader (Ko-kneader). The heating temperature during the kneading is usually appropriately selected within the range of 240 to 320 C. As the melt kneading, it is preferred to use an extrusion molding machine, particularly a vented extrusion molding machine. Further, the component other than the polycarbonate resin may be melt-kneaded with a polycarbonate resin or another thermoplastic resin in advance, that is, in the form of a master batch. The polycarbonate resin composition of the present invention can be produced by the above-described melt-kneading former or by using the obtained particulate matter as a raw material by injection molding, injection compression molding, extrusion molding, blow molding, extrusion molding. Various molded articles are produced by vacuum forming, foam molding, and the like. In particular, it can be preferably used in the production of an injection molded article by injection molding and injection molding using the obtained particulate matter. The molded body comprising the polycarbonate resin composition of the present invention can be preferably used, for example, as: (1) a television, a radio cassette, a video camera, a video recorder, an audio player, and a DVD (digital video disc, Digital versatile discs. Players, air conditioners, mobile phones, monitors, computers, registers, calculators, photocopiers, printers, fax machines, etc. Electrical, 151934.doc •16· 201125923 Electronics (2) The casing for electric and electronic equipment of the above 1; (3) The base plate for electrical and electronic equipment of the above 1. EXAMPLES Hereinafter, the present invention will be more specifically described by showing examples and comparative examples, but the present invention is not limited by the examples. The performance evaluation method and the raw materials used are expressed as D. [Performance evaluation method] (1) Thin-wall flame retardancy A vertical burning test was performed using a test piece (length 127 mm, width 12 7 mm, thickness 1_2 mm) prepared in accordance with UL standard 94. According to the test results, the rating is UL94 V-0, V-丨, or v_2, and the one that does not reach v_2 is set to v_2. Further, the UL standard 94 is a method of evaluating the flame retardancy based on the afterflame time after the test piece of the specific size which is perpendicular to the flame of the burner is in contact with the flame of the burner for 10 seconds. (2) Thermal conductivity The thermal conductivity measurement device "TPA-5CH" [Kyoto Electronics Industry Co., Ltd.] was used for measurement by the Hot Disk method. (3) Tensile properties were measured in accordance with ASTM D638. (4) Bending characteristics a) Bending strength Measured according to ASTM D790. b) Flexural modulus 151934.doc -17- 201125923 A test piece with a thickness of 4 mm and a length of 13 mils made by an injection molding machine, according to ASTM standard D_79〇, the distance between the fulcrums is % _, and the load speed is 20 A 3-point bending test was performed under the condition of _/min, and the bending elastic modulus was calculated from the slope of the load-strain curve. (5) Soldering characteristics The test piece was formed by welding at a central portion of a test piece having a length of 127 mm, a width of 12.3 mm, and a thickness of i 2 coffee, and the welding strength (bending strength) was measured in accordance with ASTM D79. (6) Impact characteristics a) Izod impact strength with notch (IZ〇D) A test piece of thickness 3 2 mm (1/8 inch) made by an injection molding machine is used according to ASTM standard D-256. The impact strength was measured at a measurement temperature of 23 ° C. b) Unnotched Izod impact strength (IZ〇D) A test piece having a thickness of 3 2 mm (1/8 inch) produced by an injection molding machine was used, and the temperature was measured in accordance with ASTM standard D-256. (Measurement of impact strength under ®) Ο Charpy (flat roll method) Impact strength A test piece having a thickness of 3 2 mm (1/8 inch) produced by an injection molding machine was used, and the impact was measured by the flat roll method in accordance with JIS K7111. (7) Flow characteristics (flow value) Using a high-grade rheometer, according to jIS_K721〇, at 32 〇 (at a temperature of 100 kg, the load is measured. (8) Release property 151934.doc - 18-201125923 According to the method of JIS K7218-A, the target material is SUS304 at room temperature, and the sliding test is carried out under the conditions of a surface pressure of 250 kPa and a speed of 0.5 m/sec, and the coefficient of dynamic friction is measured. A) Ingredient A-1: Aromatic polycarbonate resin [Manufactured by Idemitsu Kosan Co., Ltd., "FN1900A", Mv=19,500] Α-2: Aromatic polycarbonate resin [Idemitsu Kosan Co., Ltd.," FN2200A", Μν=21,500] Α-3 : Aromatic polycarbonate resin [Manufactured by Idemitsu Kosan Co., Ltd., "FN2500A", Μν=24,5 00] Α-4: Aromatic polycarbonate resin Production (stock) manufacturing, "fn26〇〇A", Μν=26,000] (Β) composition graphite Β-1. Natural graphite [Japan black lead work The company manufactures "cB_15〇"; scales; grain size knife. 63 μηι below 77~873⁄4, 1〇6 μιη or more is 5% or less; apparent density is 0.2~0_3 gW; 5〇% cumulative particle size is 3 48哗; fixed barrier is % mass. /. above; ash is i mass% or less; volatile component is 蹭 quantity., below. B 2 person & graphite [made by Nippon Black Industrial Co., Ltd.; amorphous; 50 The % cumulative particle size is 3〇~4〇々υ μιη (5〇μηη or more is 5〇% or less); the degree of visibility is 0.29~G.37 g/em3; the fixed carbon is 99% by mass or more; the ash is 0.3. Quality. / 〇 below; volatile components are 〇 3 mass. Below]

(C) Component PTFE Li [S°1VaySGlexi~Manufacture, "Aig-F5"』g〇n〇n 151934.doc -19· 201125923 F5 is easy to agglomerate, so the masterbatch is temporarily made with PC scales (mixing ratio (mass) PC: PTFE = 90: 10 to 80: 20) and then blended] (D) Ingredients Organic alkali (soil) metal salt p-toluenesulfonic acid sodium salt [DAH DIING CHEMICAL INDUSTRY company; purity 93%; sulfuric acid as an impurity Sodium is 3% by mass or less, and water is 5% by mass or less. (E) Other additives Antioxidant E-1: Phosphorus-based antioxidant (diphenylisooctyl phosphite) [Adekastab C, manufactured by ADEKA Corporation] E-2: phenolic antioxidant (3-(3,5-di-t-butyl-hydroxyphenyl)-propionate octadecyl ester) [manufactured by Ciba Japan, "Irganox 1076"] (F Ingredients Other additives Release agent F-1: Stearic acid monoglyceride [Riken Vitamin (Rikemal S-100A)] F-2: Pentaerythritol tetrastearate [Riken Vitamin] "Rikester EW-440A"] Examples 1 to 15 and Comparative Examples 1 to 9 The components were mixed in the ratios shown in Tables 1 and 2, and supplied to a vented biaxial extrusion molding. [Manufactured by Toshiba Machine: TEM3 5], at a cylinder temperature of 300~320 ° C, 200~600 rpm screw speed, the discharge amount 1〇~30 kg / hr under conditions of melt-kneading the obtained pellets for evaluation samples. Using the sample for evaluation of the particles, each test was carried out by using an injection molding machine at a molding resin temperature of 320 ° C to prepare test pieces for each test. The results are shown in Tables 1 and 2. 151934.doc •20· 201125923 Example 15 〇1 21,500 1 16.67 mm 〇ro m c> Bu O Bu d O *〇00 Bu 00 〇•rj ν-Γ 卜m — 〇\ Π"} m ON (Ν' 1 Embodiment 14 〇ο σ\ 二(N m 〇(S md Ό 〇ό do «η w-ί 〇\ »〇ON 00 5,500 卜m — 00 m Ά rn 1 Example 13 〇 21,500 σ\ & O o inch od 5 o inch »r>«r> Stone 1 4,200 1 芝»n 沄m wS 1 Example 12 〇26,000 s 13.21 00 mo 00 moa\ o ON do (Ν ss g ο ο CN (Ν v〇 % 00 CN 卜 1 Example 11 〇ο η m 16.67 mom 〇卜o 卜o 沄o J 卜 (Ν 00 ο 00 Ο κ jri *rt 1 Example 10 〇 26,000 = (N rn (N md VO ov £ > d swallow o 〇 οο 2 ο (Ν 00 (Ν m ΡΟ 00 ON ί^5 ri I Example 9 〇 21,500 2 (N ^ 〇 〇 〇 (N ^ ov〇o 〇o $ ο ο ο οο " Art jrj 1 Example 8 〇ο oC 二 m 〇fN O oo 〇o οοο g ο οο ν〇CS \6 ΓΛ Γ^ί inch (N t Example 7 〇 26,000 1 SO CTs <N 〇o beer o Keep od ο (Νλ ό" mm fN οό Ο Ο to m (N 1 Example 6| 〇 1 21,500 〇 CS mo Ό odo wS OS V) ο «ο 00 m — ο ΓΟ m 〇rn 1 Example 5 〇ο ό&quot (Ν卜o CN m O so o Ό o cc ci J § ο :8,500 Ο ο »〇宕o Example 4 〇Ο ο ν〇Λ fN Ό ON o rn VO 〇v£> o cc o 卜1 8,500 1 ο 00 \〇«ο (N <N 〇Example 3 〇26,000 CS mo (N m 〇VO odo ; V) ο g 6,500 mmm οο ο 〇 (N 1 Example 2 〇ο ο νο" CS JO o fN mo Ό 〇Ό 〇» o ο SS s 10,500 Vi fS Ό 卜 'O 1 Example 1 〇ο Oft \〇(Ν = om 〇<5 ddd 卜m 00 2,8,600 1 (N m ο • η *η μ <N (N 〇<N << rj· < raw material molecular weight ώ <N DQ S' W (M (N tu thin-wall flame retardant thermal conductivity [W/mK] fracture [MPa] 1 bending strength [MPa] bending elastic modulus [MPa] WELD bending strength [MPa] IZ0D (notched) KJ/m2 IZ0D (no gap) KJ/m2 Charpy (flat, no gap) Flow value (10·2 Ml/sec) dynamic friction coefficient gg £ 1 physical properties I 1 tensile properties I bending properties | welding properties | impact properties flow properties release properties -21 · 151934.doc 201125923 S 1:3⁄4 001 000-

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S g (3} ω S fa dJ j£i 151934.doc -22- 201125923 The following can be clarified according to Tables 1 and 2'. In Examples 1 to 15, all evaluation items are excellent 'especially In Examples 1 to 6 containing the components (A) to (c), even if the component (D) containing no flame retardant is contained, a thin wall (thickness of 1.2 mm) flame retardancy and thermal conductivity can be obtained. A polycarbonate resin composition excellent in 'bending characteristics and impact strength. Further, 'In Examples 8 to 10, the thin-wall flame retardancy is particularly excellent, and V-0 can be achieved. The graphite content of the component (B) is small. In Comparative Example 1 and Comparative Example 7, the thermal conductivity was lowered, and in Comparative Example 2 and Comparative Example 8 in which the component (B) was excessive, the impact characteristics were lowered. Comparative Example 3 in which the PTFE content of the component (C) was small was compared. In Example 5 and Comparative Example 6, the thin-wall flame retardancy was lowered, and in Comparative Example 4 and Comparative Example 9 in which the antimony component was excessive, the flow characteristics were deteriorated and the moldability was inferior. Further, according to Example 1, Example 4 and Examples 5. Comparison with Comparative Example 3 'Understandably, by making the PTFE of the component (c) into the amount within the scope of the invention of the present invention Friction coefficient is small, to improve the release properties. 151934.doc • 23 ·

Claims (1)

201125923 VII. Patent Application Range: 1 - A polycarbonate resin composition containing (B) graphite (28 to 90 parts by mass) and (〇聚四) with respect to 100 parts by mass of (A) aromatic polycarbonate resin The ethylene resin composition of claim 1 further comprises (D) an organic base (earth) metal salt in an amount of 0.1 to 0.5 parts by mass. 3. As claimed in claim 1 or A polycarbonate resin composition according to claim 2, wherein the graphite is a polycarbonate resin composition according to claim 2, wherein the graphite is an artificial resin. The organic alkali metal salt and/or the organic alkaline earth metal salt is at least one selected from the group consisting of an alkali metal sulfonate, an alkali metal sulfonate, a metal salt of a polyphenylene acid acid, and a metal salt of a polystyrene acid. The polycolonate resin composition of the long term 5, wherein the alkali metal sulfonate is a sodium sulfonate compound. A molded body, a resin composition. It comprises the polycarbonate electronic machine part according to any one of claims 1 to 6. Housing for electronic equipment. Base plate for electronic equipment. 8. The molded body of claim 7, which is the molded body of claim 7, which is a molded body of the electrical item such as the month length item 7, which is electrically 151934.doc 201125923. 4. Designated representative figure: The representative representative of the case is: (none) (2) The symbol of the symbol of the representative figure is simple: 5. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: (none) 151934.doc