JP2007031611A - Thermoplastic resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition having slight metallic corrosion and excellent thermal conductivity. <P>SOLUTION: The thermoplastic resin composition comprises 99-20 parts wt. of a thermoplastic resin (component A) and 1-80 parts wt. of graphite (component B) having ≤0.15 g/cm<SP>3</SP>apparent density and pH 4-10 in a water layer when 5 g of graphite powder is dispersed into 100 g of water. Preferably the graphite (component B) has ≤5 μm particle thickness and 0.1-500 μm particle diameter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thermoplastic resin composition having excellent thermal conductivity. More specifically, the present invention relates to a thermoplastic resin composition that has low metal corrosivity and excellent thermal conductivity.

  Thermoplastic resins are widely used in all industries because of their ease of production and molding. In particular, engineering plastics and super engineering plastics resin compositions generally have excellent heat resistance and impact resistance, and are widely used in electronic devices, machines, automobiles, and the like. In particular, in recent electronic devices, the heat generated inside the electronic device is efficiently externalized by increasing the density of semiconductor packages and increasing the speed and integration of LSIs as performance, size, and weight are reduced. Measures to dissipate heat are a very important issue.

  Usually, in order to diffuse the heat inside an electronic device, a method using a metal or ceramic material with good thermal conductivity, a method of dissipating heat from a heat source using a metal heat sink or a heat dissipation fan, In order to reduce the contact thermal resistance between the heat source and the radiator, a method of promoting heat radiation by interposing a sheet material made of grease having a large thermal conductivity or a flexible thermal conductive polymer composition is used.

  These polymer compositions that require thermal conductivity are conventionally made of aluminum oxide, boron nitride, aluminum nitride, silicon nitride, magnesium oxide, and zinc oxide, which have high thermal conductivity in polymer materials such as resins and rubbers. In addition, those filled with fillers such as metal oxides such as silicon carbide, quartz and aluminum hydroxide, metal nitrides, metal carbides and metal hydroxides are used. However, these compositions have not necessarily obtained sufficiently large thermal conductivity.

On the other hand, as a method for further improving the heat conductivity, a heat conductive polymer material in which a high carbon material is filled with a carbon material has been proposed.
For example, a method of adding graphitized carbon fiber to a polymer material (see Patent Documents 1 to 3) and a method of adding pitch-based carbon fiber and scaly graphite to a thermoplastic resin (see Patent Document 4) are known. If the thermal conductive filler is not filled in a large amount, sufficient thermal conductivity cannot be obtained, and furthermore, it is impossible to obtain a large amount of these graphitized carbon fiber materials or pitch-based carbon fibers industrially at low cost. It is not practical. In addition, a method of adding graphite to a thermoplastic resin (see Patent Document 5) is disclosed. However, since the calorific value of electronic devices and the like in recent years is increasing, there is a need for further higher thermal conductivity and there is room for improvement.

  Furthermore, although a method of blending expanded graphite with a resin (see Patent Documents 6 to 8) is disclosed, when this expanded graphite is used for a thermoplastic resin, excellent thermal conductivity can be obtained. It is inferior to the metal corrosiveness at the time of molding, and it causes practical problems because it corrodes the extruder, the molding machine, and the mold to be used.

JP 2002-88250 A JP 2002-339171 A JP 2003-112915 A JP 2003-49081 A JP 2002-346308 A Japanese Patent Laid-Open No. 08-188407 JP 2001-31880 A Japanese Patent Laid-Open No. 03-181532

An object of the present invention is to provide a thermoplastic resin composition that has low metal corrosivity and excellent thermal conductivity.
As a result of intensive studies in view of the above-mentioned problems of the prior art, the inventor has an apparent density of 0.15 g / cm ³ or less and a pH of the aqueous layer when 4 g of graphite powder is dispersed in 100 g of water. It was found that a thermoplastic resin composition having low metal corrosivity and excellent thermal conductivity can be obtained by blending graphite of 10 to 10 into the thermoplastic resin composition, and as a result, the present invention has been achieved.

  The present invention comprises 99 to 20 parts by weight of a thermoplastic resin (component A), 1 to 80 parts by weight of graphite (component B) having a pH of 4 to 10 when 5 g of graphite powder is dispersed in 100 g of water. The present invention provides a thermoplastic resin composition having low metal corrosivity and excellent thermal conductivity.

  The thermoplastic resin of the component A used in the present invention is not basically limited, and in particular, a thermoplastic resin used for a housing of an electronic device or an internal mechanism component is preferably used. Examples of such thermoplastic resins include polypropylene resins, styrene resins, modified polyphenylene oxide resins, polyamide resins, polycarbonate resins, polyphenylene ether resins, polyphenylene sulfide resins, polyester resins, polyarylate resins, polyester elastomers, polyamide elastomers, Examples include thermoplastic elastomers such as acrylic elastomers. Particularly preferable examples include AS resin, ABS resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate resin, and a mixture of two or more thereof.

  The more preferable thermoplastic resin (component A) of the present invention is preferably a thermoplastic resin containing 50% by weight or more of a polycarbonate resin, preferably 60% by weight or more, more preferably 70% by weight or more. preferable.

Such a polycarbonate resin may be various polycarbonate resins having a high heat resistance or a low water absorption, which are polymerized using other dihydric phenols, in addition to the commonly used bisphenol A type polycarbonate. The polycarbonate resin may be produced by any production method, and in the case of interfacial polycondensation, a terminal stopper of a monohydric phenol is usually used. The polycarbonate resin may also be a branched polycarbonate resin obtained by polymerizing trifunctional phenols, and further a copolymer obtained by copolymerizing an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid, or a divalent aliphatic or alicyclic alcohol. Polycarbonate may be used. The viscosity average molecular weight of the polycarbonate resin is preferably 13,000 to 40,000, more preferably 15,000 to 38,000. The viscosity average molecular weight (M) of the aromatic polycarbonate resin is obtained by inserting the specific viscosity (η _sp ) obtained at 20 ° C. from a solution of 0.7 g of the polycarbonate resin in 100 ml of methylene chloride into the following equation. Details of the polycarbonate resin are described in JP-A No. 2002-129003.
η _sp /c=[η]+0.45×[η] ² c (where [η] is the intrinsic viscosity)
[Η] = 1.23 × 10 ⁻⁴ M ^0.83
c = 0.7

As specific examples of various polycarbonate resins polymerized using other dihydric phenols and having high heat resistance or low water absorption, the following can be suitably exemplified.
(1) In 100 mol% of the dihydric phenol component constituting the polycarbonate, 4,4 '-(m-phenylenediisopropylidene) diphenol (hereinafter abbreviated as "BPM") component is 20 to 80 mol% (more preferable) 40 to 75 mol%, more preferably 45 to 65 mol%), and 9,9-bis (4-hydroxy-3-methylphenyl) fluorene (hereinafter abbreviated as "BCF") component is 20 to 20 mol. Copolycarbonate which is 80 mol% (more preferably 25 to 60 mol%, more preferably 35 to 55 mol%).
(2) In 100 mol% of the dihydric phenol component constituting the polycarbonate, the bisphenol A component is 10 to 95 mol% (more preferably 50 to 90 mol%, more preferably 60 to 85 mol%), And a BCF component in an amount of 5 to 90 mol% (more preferably 10 to 50 mol%, and still more preferably 15 to 40 mol%).
(3) In 100 mol% of the dihydric phenol component constituting the polycarbonate, the BPM component is 20 to 80 mol% (more preferably 40 to 75 mol%, more preferably 45 to 65 mol%), and The 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane component is 20 to 80 mol% (more preferably 25 to 60 mol%, more preferably 35 to 55 mol%). Copolycarbonate.

  These special polycarbonates may be used alone or in combination of two or more. Moreover, these can also be mixed and used for the bisphenol A type polycarbonate generally used.

  The production method and characteristics of these special polycarbonates are described in detail in, for example, JP-A-6-172508, JP-A-8-27370, JP-A-2001-55435, and JP-A-2002-117580. ing.

  The graphite used as the component B in the present invention is graphite having a pH of 4 to 10, preferably 5 to 9, and more preferably 6 to 8 when 5 g of graphite powder is dispersed in 100 g of water. If the pH is lower than 4, corrosion of metal parts such as an extruder, a molding machine or a mold used for product processing tends to occur, which is not preferable. Moreover, when pH exceeds 10, since the thermal stability of a thermoplastic resin especially polycarbonate-type resin is impaired, it is unpreferable. This pH value is a value measured by the following method. That is, 5 g of graphite was put into a sample bottle with an internal volume of 200 mL, and further 100 g of ultrapure water produced by, for example, an ultrapure water production apparatus manufactured by Japan MILLIPORE Co., Ltd. was added and shaken with a shaker for 10 minutes. The pH of the aqueous layer obtained by filtering and separating the product with a glass filter was measured with a pH meter.

The graphite apparent density is at 0.15 g / cm ³ or less More preferably 0.13 g / cm ³ or less, more preferably 0.10 g / cm ³ or less, further preferably set to 0.07 g / cm ³ or less Desirably graphite. When the apparent density is larger than 0.15 g / cm ³ , the thermal conductivity is inferior. The graphite is preferably prepared by pulverizing at least one graphite selected from the group consisting of natural phosphorus-like graphite, pyrolytic graphite, and quiche graphite.

  As a method for producing such low apparent specific gravity graphite, there is a dry pulverization method which is a general pulverization method such as a dry pulverizer such as a hammer mill, a jet mill or a ball mill. Another method of pulverizing graphite is to roughly pulverize graphite with a dry pulverizer, add a pulverization aid such as water to form a slurry, and then pulverize with a wet pulverizer in this state, then dehydrate and dry. There is a wet pulverization method.

  The graphite of the present invention can be produced by any pulverization method. For example, highly oriented flaky graphite pulverized by the method described in JP-A-6-254422 is more preferable, and the particle thickness of the flaky graphite is more preferable. Is 5 μm or less, preferably 3 μm or less, more preferably 1 μm or less, and the particle size is 8 to 1000 μm, preferably 10 to 500 μm, more preferably 12 to 300 μm, and still more preferably 15 to 100 μm. If the particle size is 8 μm or less, the extrusion stability during production of the resin composition is poor and the productivity is lowered, which is not preferable. When the particle diameter exceeds 1000 μm, the appearance of the surface of the molded product is deteriorated, which is not preferable.

  In general, expanded graphite having a low apparent specific gravity is preferably produced by pulverizing graphite after acid treatment with an acid such as sulfuric acid, followed by pulverization, so that the acid component remains and the pH becomes 4 or less. Absent.

  The particle thickness and particle diameter were measured by the following method. That is, the particle thickness and the particle diameter of graphite are a number average particle thickness and a number average particle diameter calculated by a number average of a total of 1,000 particles observed with a scanning electron microscope and extracted indiscriminately.

  The graphite raw material used in the present invention is artificial graphite, graphite obtained by heat treatment of natural phosphorus-like graphite, massive graphite, earthy graphite or petroleum coke, petroleum pitch, amorphous carbon, etc. that are naturally produced as minerals. By heating the base material to a high temperature of 2000 ° C. or higher, pyrolytic graphite obtained by carbon deposition on the surface of the base material by hydrocarbon decomposition polymerization or the like, and cooling and precipitating the molten iron It is preferable to use natural phosphorus-like graphite, pyrolytic graphite, and quiche graphite having higher crystallinity.

  In addition, the surface of the graphite of the present invention may be subjected to surface treatment such as epoxy treatment, urethane treatment, silane coupling treatment, oxidation, in order to increase the affinity with the aromatic polycarbonate resin as long as the characteristics of the composition of the present invention are not impaired. Processing etc. may be given.

Here, the compounding quantity of A component is 99-20 weight part per 100 weight part of total of (A) and (B) component, 90-30 weight part is preferable, 80-40 weight part is more preferable, 80- More preferred is 50 parts by weight.
The amount of component B is 1 to 80 parts by weight per 100 parts by weight of the total of components (A) and (B), preferably 10 to 70 parts by weight, more preferably 20 to 60 parts by weight, and 20 to 50 parts by weight. Is most preferred. If it is less than 1 part by weight, the thermal conductivity is poor. If it exceeds 80 parts by weight, the injection moldability is remarkably impaired.

  In order to obtain low anisotropy and rigidity, the resin composition of the present invention contains an inorganic filler (C) per 100 parts by weight of the total of the components (A) and (B) within the range where the effects of the present invention are exhibited. 1 to 200 parts by weight of component) can be blended. As this inorganic filler, at least one inorganic mineral filler selected from the group consisting of mica, talc and wollastonite is preferably used.

  Such mica desirably has an average particle size of 30 to 300 μm, preferably 30 to 280 μm, more preferably 35 to 260 μm. The average particle diameter is a number average particle diameter calculated by a number average of a total of 1,000 particles observed with a scanning electron microscope and extracted indiscriminately. When the number average particle diameter is less than 30 μm, the impact strength is lowered, and the thermal stability of the aromatic polycarbonate resin may be lowered. On the other hand, if it exceeds 300 μm, the impact strength is improved, but the appearance tends to deteriorate. Deterioration of the appearance deteriorates the slipperiness of a member through which paper passes, and may not be preferable.

  The average particle diameter of such mica is preferably in the range of 30 to 100 μm, more preferably in the range of 35 to 80 μm, when the appearance is more important. On the other hand, when the appearance is not regarded as important, mica in the range of 100 to 300 μm, more preferably 100 to 260 μm is used from the viewpoint of rigidity and impact strength.

  As the thickness of mica, one having a thickness measured by electron microscope observation of 0.01 to 10 μm, preferably 0.1 to 5 μm can be used. An aspect ratio of 5 to 200, preferably 10 to 100 can be used. The mica used is preferably mascobite mica, and mascobite mica can achieve higher rigidity and higher strength than other mica such as phlogopite.

  In addition, as a method for pulverizing mica, a dry pulverization method of pulverizing raw mica ore with a dry pulverizer, and coarsely pulverizing mica rough ore with a dry pulverizer, followed by adding a grinding aid such as water in a slurry state There is a wet pulverization method in which main pulverization is performed by a wet pulverizer, followed by dehydration and drying. The mica of the present invention can be produced by any pulverization method, but the dry pulverization method is generally lower in cost. On the other hand, the wet pulverization method is effective for pulverizing mica more thinly and finely, but is expensive. Mica may be surface-treated with various surface treatment agents such as silane coupling agents, higher fatty acid esters, and waxes, and further granulated with sizing agents such as various resins, higher fatty acid esters, and waxes to form granules. May be.

Such talc is a scaly particle having a layered structure, and is chemically hydrous magnesium silicate, generally represented by the chemical formula 4SiO ₂ .3MgO · 2H ₂ O, and generally SiO ₂ is 56. ˜65 wt%, MgO 28˜35 wt%, and H ₂ O about 5 wt%. As other minor components, Fe ₂ O ₃ is 0.03 to 1.2% by weight, Al ₂ O ₃ is 0.05 to 1.5% by weight, CaO is 0.05 to 1.2% by weight, K ₂ O. Is 0.2 wt% or less, Na ₂ O is 0.2 wt% or less, and the specific gravity is about 2.7.

  The average particle diameter of such talc is preferably 0.5 to 30 μm. The average particle size is a particle size at a 50% stacking rate obtained from the particle size distribution measured by the Andreazen pipette method measured according to JIS M8016. The particle diameter of talc is preferably 2 to 30 μm, more preferably 5 to 20 μm, and still more preferably 10 to 20 μm. In the range of 0.5 to 30 μm, better flame retardancy is achieved when a flame retardant formulation is applied.

  In addition, there is no particular limitation on the manufacturing method when talc is crushed from raw stone, and the axial flow mill method, the annular mill method, the roll mill method, the ball mill method, the jet mill method, the container rotary compression shearing mill method, etc. are used. can do. Furthermore, the talc after pulverization is preferably classified by various classifiers and has a uniform particle size distribution. There are no particular restrictions on the classifier, impactor type inertial force classifier (variable impactor, etc.), Coanda effect type inertial force classifier (elbow jet, etc.), centrifugal field classifier (multistage cyclone, microplex, dispersion separator) , Accucut, Turbo Classifier, Turboplex, Micron Separator, and Super Separator).

  Further, talc is preferably in an agglomerated state in view of its handleability and the like, and as such a production method, there are a method using degassing compression, a method using compression using a sizing agent, and the like. In particular, the degassing compression method is preferable in that the sizing agent resin component which is simple and unnecessary is not mixed into the resin composition of the present invention.

Further, wollastonite, which is another C component, is substantially represented by the chemical formula CaSiO _3. Usually, SiO ₂ is about 50 wt% or more, CaO is about 47 wt%, and other Fe ₂ O ₃ , Al ₂ O. ₃ etc. are included. Wollastonite is a white acicular powder obtained by crushing and classifying raw wollastonite. The average fiber diameter of the wollastonite used is preferably 0.5 to 10 μm, and more preferably 1 to 5 μm. The average fiber diameter is calculated by an average of a total of 1000 pieces that are observed with a scanning electron microscope and extracted indiscriminately.

  The content of these C components is 1 to 200 parts by weight, preferably 2 to 100 parts by weight, more preferably 5 to 80 parts by weight, and more preferably 10 to 50 parts by weight per 100 parts by weight of the total of components (A) and (B). Part is most preferred. Less than 1 part by weight is not preferable because the reinforcing effect of rigidity is small. An amount of 200 parts by weight or more is not preferable because the extrudability during the production of the composition is significantly deteriorated.

In order to obtain rigidity, the resin composition of the present invention contains 1 fibrous filler (D component) per 100 parts by weight in total of the components (A) and (B) within the range in which the effects of the present invention are exhibited. -200 weight part can be mix | blended. The fibrous filler is preferably at least one fibrous filler selected from the group consisting of glass fiber, glass milled fiber, carbon fiber, and metal-coated carbon fiber.
These fibrous fillers are more preferably sized with an epoxy or urethane sizing agent, but can be used without being converged.

  The content of these components D is 1 to 200 parts by weight, preferably 2 to 100 parts by weight, more preferably 5 to 80 parts by weight, and more preferably 10 to 50 parts by weight per 100 parts by weight of the components (A) and (B). Part is most preferred. Less than 1 part by weight is not preferable because the reinforcing effect of rigidity is small. An amount of 200 parts by weight or more is not preferable because the extrudability during the production of the composition is significantly deteriorated.

  The resin composition of the present invention includes glass flakes and glass as non-fibrous glass filler (E component) per 100 parts by weight of the total of components (A) and (B) within the range where the effects of the present invention are exhibited. 1 to 200 parts by weight of at least one non-fibrous glass filler selected from the group consisting of balloons and glass beads can be blended.

  The content of these E components is 1 to 200 parts by weight, preferably 2 to 100 parts by weight, more preferably 5 to 80 parts by weight, and more preferably 10 to 50 parts by weight per 100 parts by weight of the total of components (A) and (B). Part is most preferred. Less than 1 part by weight is not preferable because the reinforcing effect of rigidity is small. An amount of 200 parts by weight or more is not preferable because the extrudability during the production of the composition is significantly deteriorated.

In the resin composition of the present invention, 0.01 to 5 parts by weight of the lubricant (F component) is blended per 100 parts by weight of the total of the components (A) and (B) within the range where the effects of the present invention are exhibited. I can do it.
Such a lubricant is a widely known compound for reducing friction with an apparatus or a mold in plastic molding and obtaining a good mold release. Specifically, olefin wax, higher fatty acid (for example, carbon) Examples are esterified products of (sixteen to sixty aliphatic carboxylic acids), polyalkylene glycols having a degree of polymerization of about 10 to 200, silicone oils, fluorocarbon oils, and the like. Examples of olefin waxes include paraffin wax, microcrystalline wax, Fischer-Tropsch wax, and α-olefin polymer as paraffin wax. Examples of polyethylene wax include polyethylene having a molecular weight of about 1,000 to 15,000. Examples include polypropylene. This molecular weight is a weight average molecular weight calculated based on a calibration curve obtained from standard polystyrene in GPC (gel permeation chromatography).

  As the lubricant, an acidic group-containing lubricant, more specifically, an olefin wax having a carboxyl group and / or an acid anhydride group thereof, and an ester group-containing wax are more preferably used from the viewpoint of the rigidity of the composition. In addition, the density | concentration of the acidic group in an acidic group containing lubricant is 0.05-10 meq / g, More preferably, it is 0.1-6 meq / g, More preferably, it is 0.5-4 meq / g.

  Content of F component is 0.01-5 weight part per 100 weight part of total of (A) and (B) component, 0.03-3 weight part is preferable, 0.05-2 weight part is more preferable . If it is less than 0.01 part by weight, it is not preferable because it is inferior in mold release. 2 parts by weight or more is not preferable because the heat resistance of the composition is deteriorated.

The resin composition of the present invention contains 0.01 to 3 parts by weight of a phosphorus stabilizer (G component) per 100 parts by weight of the total of the components (A) and (B) within the range where the effects of the present invention are exhibited. Can be blended.
Such a phosphorus-based stabilizer is preferably contained in order to obtain a thermally conductive thermoplastic tree seed composition having better rigidity and thermal stability. Examples of phosphorus stabilizers include phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid, and esters thereof.

  Specifically, as the phosphite compound, for example, triphenyl phosphite, tris (nonylphenyl) phosphite, tridecyl phosphite, trioctyl phosphite, trioctadecyl phosphite, didecyl monophenyl phosphite, dioctyl monophenyl Phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, tris ( Diethylphenyl) phosphite, tris (di-iso-propylphenyl) phosphite, tris (di-n-butylphenyl) phosphite, tris (2,4-di-tert-butylpheny) ) Phosphite, tris (2,6-di-tert-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2 , 6-Di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-ethylphenyl) pentaerythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite Phyto, bis (nonylphenyl) pentaerythritol diphosphite, dicyclohexyl pentaerythritol diphosphite, and the like.

  Further, as other phosphite compounds, those which react with dihydric phenols and have a cyclic structure can be used. For example, 2,2′-methylenebis (4,6-di-tert-butylphenyl) (2,4-di-tert-butylphenyl) phosphite, 2,2′-methylenebis (4,6-di-tert- Butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite, 2,2′-methylenebis (4-methyl-6-tert-butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite 2,2′-ethylidenebis (4-methyl-6-tert-butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite.

  Examples of the phosphate compound include tributyl phosphate, trimethyl phosphate, tricresyl phosphate, triphenyl phosphate, trichlorophenyl phosphate, triethyl phosphate, diphenyl cresyl phosphate, diphenyl monoorxenyl phosphate, tributoxyethyl phosphate, dibutyl phosphate, dioctyl phosphate, Examples thereof include diisopropyl phosphate, and triphenyl phosphate and trimethyl phosphate are preferable.

  Examples of the phosphonite compound include tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite, tetrakis (2,4-di-tert-butylphenyl) -4,3′-biphenylenedi. Phosphonite, tetrakis (2,4-di-tert-butylphenyl) -3,3′-biphenylenediphosphonite, tetrakis (2,6-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite Tetrakis (2,6-di-tert-butylphenyl) -4,3′-biphenylene diphosphonite, tetrakis (2,6-di-tert-butylphenyl) -3,3′-biphenylene diphosphonite, bis (2,4-di-tert-butylphenyl) -4-phenyl-phenylphosphonite, bis (2,4-di tert-butylphenyl) -3-phenyl-phenylphosphonite, bis (2,6-di-n-butylphenyl) -3-phenyl-phenylphosphonite, bis (2,6-di-tert-butylphenyl)- 4-phenyl-phenylphosphonite, bis (2,6-di-tert-butylphenyl) -3-phenyl-phenylphosphonite, and the like, and tetrakis (di-tert-butylphenyl) -biphenylenediphosphonite, bis (Di-tert-butylphenyl) -phenyl-phenylphosphonite is preferred, tetrakis (2,4-di-tert-butylphenyl) -biphenylenediphosphonite, bis (2,4-di-tert-butylphenyl)- More preferred is phenyl-phenylphosphonite. Such a phosphonite compound is preferable because it can be used in combination with a phosphite compound having an aryl group in which two or more alkyl groups are substituted.

  Examples of the phosphonate compound include dimethyl benzenephosphonate, diethyl benzenephosphonate, and dipropyl benzenephosphonate.

The phosphorus stabilizers can be used alone or in combination of two or more. Among the phosphorus stabilizers, phosphite compounds or phosphonite compounds are preferable. In particular, a phosphite compound typified by trimethyl phosphite is preferably blended.
The compounding amount of the phosphorus stabilizer is 0.01 to 3 parts by weight, preferably 0.02 to 1 part by weight, and more preferably 0.02 parts per 100 parts by weight in total of the components (A) and (B). -0.5 parts by weight. When the amount of the phosphorus stabilizer is too much less than the above range, it is difficult to obtain a good stabilizing effect, and when it exceeds the above range, the physical properties of the composition may be lowered.

The resin composition of the present invention may contain 1 to 50 parts by weight of a flame retardant (H component) per 100 parts by weight of the total of the components (A) and (B) within the range where the effects of the present invention are exhibited. I can do it.
As such a flame retardant (H component), an organic halogen flame retardant or a phosphate ester flame retardant is preferable.

  Examples of the organic halogen flame retardant include halogenated carbonate oligomer, halogenated epoxy compound, halogenated polystyrene, halogenated triazine compound, halogenated diphenylalkane compound, halogenated indane compound, and halogenated aromatic phthalimide compound. Among these, halogenated carbonate oligomers and halogenated epoxy compounds are preferred because of their excellent compatibility with polycarbonate and their good heat resistance and thermal stability.

[式中、Ｘは、ハイドロキノン、レゾルシノール、ビス（４−ヒドロキシジフェニル）メタン、ビスフェノールＡ、ジヒドロキシジフェニル、ジヒドロキシナフタレン、ビス（４−ヒドロキシフェニル）スルホン、ビス（４−ヒドロキシフェニル）ケトン、およびビス（４−ヒドロキシフェニル）サルファイドからなる群より選ばれる化合物から誘導される二価の基である。ｎは０〜５の整数であり、ｎ数の異なるリン酸エステルの混合物の場合は０〜５の平均値である。Ｒ^１１、Ｒ^１２、Ｒ^１３、およびＲ^１４はそれぞれ独立して１個以上のハロゲン原子で置換したもしくは置換していないフェノール、クレゾール、キシレノール、イソプロピルフェノール、ブチルフェノール、およびｐ−クミルフェノールからなる群より選ばれる化合物より誘導される一価の基である。] On the other hand, preferred examples of phosphorus-based flame retardants include phosphate esters, phosphonate esters, and phosphazene oligomers. Further, as the phosphate ester, a compound represented by the following formula (I) is suitable.

[Wherein X is hydroquinone, resorcinol, bis (4-hydroxydiphenyl) methane, bisphenol A, dihydroxydiphenyl, dihydroxynaphthalene, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) ketone, and bis ( It is a divalent group derived from a compound selected from the group consisting of 4-hydroxyphenyl) sulfide. n is an integer of 0 to 5, and is an average value of 0 to 5 in the case of a mixture of phosphate esters having different n numbers. R ¹¹ , R ¹² , R ¹³ , and R ¹⁴ each independently comprise phenol, cresol, xylenol, isopropylphenol, butylphenol, and p-cumylphenol substituted or unsubstituted with one or more halogen atoms. It is a monovalent group derived from a compound selected from the group. ]

More preferably, X in the above formula is a divalent group derived from a compound selected from the group consisting of hydroquinone, resorcinol, bisphenol A, and dihydroxydiphenyl, and R ¹¹ , R ¹² , R ¹³ , And R ¹⁴ are each independently a monovalent group derived from a compound selected from the group consisting of phenol, cresol, and xylenol, which are substituted or more preferably substituted with one or more halogen atoms; A compound containing as a main component a component where n is an integer of 1 to 3 can be mentioned.

The amount of the flame retardant (component E) is 1 to 50 parts by weight, preferably 2 to 40 parts by weight, and 3 to 30 parts by weight per 100 parts by weight of the total of the components (A) and (B). More preferred is 3 to 20 parts by weight.
When the amount of the flame retardant is too much less than the above range, it is difficult to obtain good flame retardancy. When the amount of the flame retardant exceeds the above range, the composition may be deteriorated in heat resistance and physical properties.

In the resin composition of the present invention, the fluorine-containing anti-dripping agent (component I) is added in an amount of 0.01 to 3 wt. Can be blended in part.
Examples of the fluorine-containing anti-drip agent (component I) include a fluorine-containing polymer having a fibril-forming ability. Examples of such a polymer include polytetrafluoroethylene and tetrafluoroethylene-based copolymers (for example, tetrafluoroethylene / Hexafluoropropylene copolymer, etc.), partially fluorinated polymers as shown in US Pat. No. 4,379,910, polycarbonate resins produced from fluorinated diphenols, and the like. Among them, polytetrafluoroethylene (hereinafter sometimes referred to as PTFE) is preferable.

  PTFE having a fibril forming ability has a very high molecular weight, and tends to be bonded to each other by an external action such as shearing force to form a fiber. The molecular weight is 1 million to 10 million, more preferably 2 million to 9 million in the number average molecular weight determined from the standard specific gravity. Such PTFE can be used in solid form or in the form of an aqueous dispersion. In addition, PTFE having such fibril forming ability can improve the dispersibility in the resin, and it is also possible to use a PTFE mixture in a mixed form with other resins in order to obtain better flame retardancy and mechanical properties. is there.

  Examples of commercially available PTFE having such fibril forming ability include Teflon (registered trademark) 6J from Mitsui DuPont Fluorochemical Co., Ltd., Polyflon MPA FA500 and F-201L from Daikin Industries, Ltd. Commercially available PTFE aqueous dispersions include Asahi IC Fluoropolymers' full-on AD-1, AD-936, Daikin Kogyo's full-on D-1 and D-2, Mitsui Dupont Fluoro A typical example is Teflon (registered trademark) 30J manufactured by Chemical Corporation.

  As a mixed form of PTFE, (1) a method in which an aqueous dispersion of PTFE and an aqueous dispersion or solution of an organic polymer are mixed and co-precipitated to obtain a co-aggregated mixture (Japanese Patent Application Laid-Open No. 60-258263; (Method described in JP-A-63-154744), (2) A method of mixing an aqueous dispersion of PTFE and dried organic polymer particles (method described in JP-A-4-272957), (3) A method in which an aqueous dispersion of PTFE and an organic polymer particle solution are uniformly mixed, and each medium is simultaneously removed from the mixture (described in JP-A-06-220210, JP-A-08-188653, etc.) And (4) a method of polymerizing monomers forming an organic polymer in an aqueous dispersion of PTFE (a method described in JP-A-9-95583), and (5) A method in which an aqueous dispersion of TFE and an organic polymer dispersion are uniformly mixed, and a vinyl monomer is further polymerized in the mixture dispersion, and then a mixture is obtained (described in JP-A-11-29679, etc.). Those obtained by (Method) can be used. Examples of commercially available PTFE in a mixed form include “Metablene A3000” (trade name) manufactured by Mitsubishi Rayon Co., Ltd. and “BLENDEX B449” (trade name) manufactured by GE Specialty Chemicals.

  As a ratio of PTFE in the mixed form, PTFE is preferably 1 to 60% by weight, more preferably 5 to 55% by weight in 100% by weight of the PTFE mixture. When the ratio of PTFE is in such a range, good dispersibility of PTFE can be achieved. In addition, the ratio of said F component shows the quantity of a net fluorine-containing dripping inhibitor, and in the case of mixed form PTFE, it shows a net PTFE quantity.

The blending amount of the fluorine-containing anti-dripping agent (component F) is 0.01 to 3 parts by weight, preferably 0.05 to 2 parts by weight per 100 parts by weight of the total of components (A) and (B). 0.1 to 1 part by weight is more preferable, and 0.1 to 0.7 part by weight is most preferable.
If the fluorine-containing anti-drip agent is too much less than the above range, it is difficult to obtain sufficient anti-drip performance, and if it exceeds the above range, the appearance of the composition may be deteriorated.

(Other additives)
(Hindered phenol stabilizer)
When the resin composition of the present invention further contains a hindered phenol-based stabilizer, effects such as hue deterioration during molding and hue deterioration during long-term use are further exhibited. Examples of the hindered phenol-based stabilizer include α-tocopherol, butylhydroxytoluene, sinapir alcohol, vitamin E, n-octadecyl-β- (4′-hydroxy-3 ′, 5′-di-tert-butylfel). Propionate, 2-tert-butyl-6- (3′-tert-butyl-5′-methyl-2′-hydroxybenzyl) -4-methylphenyl acrylate, 2,6-di-tert-butyl-4- (N , N-dimethylaminomethyl) phenol, 3,5-di-tert-butyl-4-hydroxybenzylphosphonate diethyl ester, 2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2′- Methylene bis (4-ethyl-6-tert-butylphenol), 4,4′-methylene bis (2,6- Di-tert-butylphenol), 2,2′-methylenebis (4-methyl-6-cyclohexylphenol), 2,2′-dimethylene-bis (6-α-methyl-benzyl-p-cresol) 2,2′- Ethylidene-bis (4,6-di-tert-butylphenol), 2,2'-butylidene-bis (4-methyl-6-tert-butylphenol), 4,4'-butylidenebis (3-methyl-6-tert- Butylphenol), triethylene glycol-N-bis-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 1,6-hexanediol bis [3- (3,5-di-tert -Butyl-4-hydroxyphenyl) propionate], bis [2-tert-butyl-4-methyl 6- (3-tert-butyl) -5-methyl-2-hydroxybenzyl) phenyl] terephthalate, 3,9-bis {2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1,- Dimethylethyl} -2,4,8,10-tetraoxaspiro [5,5] undecane, 4,4′-thiobis (6-tert-butyl-m-cresol), 4,4′-thiobis (3-methyl) -6-tert-butylphenol), 2,2'-thiobis (4-methyl-6-tert-butylphenol), bis (3,5-di-tert-butyl-4-hydroxybenzyl) sulfide, 4,4'- Di-thiobis (2,6-di-tert-butylphenol), 4,4′-tri-thiobis (2,6-di-tert-butylphenol), 2,2-thiodiethyl Nbis- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 2,4-bis (n-octylthio) -6- (4-hydroxy-3 ′, 5′-di- tert-butylanilino) -1,3,5-triazine, N, N′-hexamethylenebis- (3,5-di-tert-butyl-4-hydroxyhydrocinnamide), N, N′-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hydrazine, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5 -Trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tris (3,5-di-tert-butyl-4-hydroxyphenyl) iso Anurate, tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, 1,3,5-tris 2 [3 (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] ethyl isocyanurate and tetrakis [methylene-3- (3 ′, 5′-di-tert -Butyl-4-hydroxyphenyl) propionate] methane and the like. All of these are readily available. The said hindered phenol type stabilizer can be used individually or in combination of 2 or more types.

  The blending amount of the hindered phenol stabilizer is 0.0001 to 1 part by weight, preferably 0.001 to 0.5 part by weight, more preferably 100 parts by weight in total of the components (A) and (B). 0.005 to 0.3 parts by weight. When the amount of the hindered phenol stabilizer is too small than the above range, it is difficult to obtain a good stabilizing effect, and when it is too much beyond the above range, the physical properties of the composition may be lowered.

(UV absorber)
The thermoplastic resin composition of the present invention may be used without coating. In such a case, good light resistance may be required, and the incorporation of an ultraviolet absorber is effective.

  Specific examples of the ultraviolet absorber include benzophenone-based compounds such as 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 2-hydroxy-4-benzyloxy. Benzophenone, 2-hydroxy-4-methoxy-5-sulfoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfoxytrihydride benzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 ', 4,4′-tetrahydroxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxy-5-sodiumsulfoxybenzophenone, bis (5- Benzoyl-4-hydroxy-2 Methoxyphenyl) methane, 2-hydroxy -4-n-dodecyloxy benzoin phenone, and 2-hydroxy-4-methoxy-2'-carboxy benzophenone may be exemplified.

  Specific examples of the ultraviolet absorber include, for example, 2- (2-hydroxy-5-methylphenyl) benzotriazole and 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole in the benzotriazole series. 2- (2-hydroxy-3,5-dicumylphenyl) phenylbenzotriazole, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2,2′- Methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol], 2- (2-hydroxy-3,5-di-tert-butylphenyl) ) Benzotriazole, 2- (2-hydroxy-3,5-di-tert-butylphenyl) -5-chlorobenzotriazol 2- (2-hydroxy-3,5-di-tert-amylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-5- tert-butylphenyl) benzotriazole, 2- (2-hydroxy-4-octoxyphenyl) benzotriazole, 2,2'-methylenebis (4-cumyl-6-benzotriazolephenyl), 2,2'-p -Phenylenebis (1,3-benzoxazin-4-one), and 2- [2-hydroxy-3- (3,4,5,6-tetrahydrophthalimidomethyl) -5-methylphenyl] benzotriazole, and 2- (2'-Hydroxy-5-methacryloxyethylphenyl) -2H-benzotriazole and co-polymerized with the monomer 2 such as a copolymer with a possible vinyl monomer and a copolymer of 2- (2′-hydroxy-5-acryloxyethylphenyl) -2H-benzotriazole with a vinyl monomer copolymerizable with the monomer Examples include polymers having a -hydroxyphenyl-2H-benzotriazole skeleton.

  Specifically, the ultraviolet absorber is, for example, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-hexyloxyphenol, 2- (4, 4-hydroxyphenyltriazine). 6-diphenyl-1,3,5-triazin-2-yl) -5-methyloxyphenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-ethyloxyphenol 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-propyloxyphenol, and 2- (4,6-diphenyl-1,3,5-triazin-2-yl) ) -5-butyloxyphenol and the like. Furthermore, the phenyl group of the above exemplary compounds such as 2- (4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hexyloxyphenol is 2,4-dimethyl. Examples of the compound are phenyl groups.

  Specifically, in the case of the cyclic imino ester, the ultraviolet absorber is, for example, 2,2′-p-phenylenebis (3,1-benzoxazin-4-one), 2,2′-m-phenylenebis (3,1). -Benzoxazin-4-one), 2,2'-p, p'-diphenylenebis (3,1-benzoxazin-4-one) and the like.

  Further, as the ultraviolet absorber, specifically, for cyanoacrylate, for example, 1,3-bis-[(2′-cyano-3 ′, 3′-diphenylacryloyl) oxy] -2,2-bis [(2- Examples include cyano-3,3-diphenylacryloyl) oxy] methyl) propane and 1,3-bis-[(2-cyano-3,3-diphenylacryloyl) oxy] benzene.

  Furthermore, the ultraviolet absorber has a structure of a monomer compound capable of radical polymerization, so that the ultraviolet absorbent monomer and / or the light stable monomer and a single amount of alkyl (meth) acrylate or the like can be obtained. It may be a polymer type ultraviolet absorber copolymerized with a body. Preferred examples of the ultraviolet absorbing monomer include compounds containing a benzotriazole skeleton, a benzophenone skeleton, a triazine skeleton, a cyclic imino ester skeleton, and a cyanoacrylate skeleton in the ester substituent of (meth) acrylic acid ester. The

  The compounding amount of the ultraviolet absorber is 0.01 to 2 parts by weight, preferably 0.03 to 2 parts by weight, more preferably 0.04 to 1 with respect to a total of 100 parts by weight of the components (A) and (B). Part by weight, more preferably 0.05 to 0.5 part by weight.

(Light stabilizer)
In the resin composition of this invention, the said ultraviolet absorber and a light stabilizer can be used together. Examples of such light stabilizers include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, tetrakis (2 , 2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2 , 3,4-Butanetetracarboxylate, poly {[6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl] [(2,2, 6,6-tetramethylpiperidyl) imino] hexamethylene [(2,2,6,6-tetramethylpiperidyl) imino]}, and polymethylpropyl 3-oxy- [4- (2,2,6,6- Tetrame Le) piperidinyl] hindered amine light stabilizer typified by a siloxane is exemplified. The above light stabilizers may be used alone or in a mixture of two or more. The blending amount of the light stabilizer is preferably 0.0005 to 3 parts by weight, more preferably 0.01 to 2 parts by weight, and 0.02 to 1 part by weight based on 100 parts by weight of the total of the components (A) and (B). Part is more preferred.

(Filler)
In the resin composition of the present invention, various fillers other than the components (C) to (E) can be blended as reinforcing fillers within the range where the effects of the present invention are exhibited. For example, calcium carbonate, carbon flakes, carbon beads, carbon milled fiber, vapor grown ultrafine carbon fiber (fiber diameter is less than 0.1 μm), carbon nanotube (fiber diameter is less than 0.1 μm, hollow), fullerene , Metal flakes, metal fibers, metal coated glass fibers, metal coated glass flakes, silica, metal oxide particles, metal oxide fibers, metal oxide balloons, and various whiskers (potassium titanate whisker, aluminum borate whisker, and base) , Etc.). These reinforcing fillers may be used alone or in combination of two or more.

(Other resins and elastomers)
In the resin composition of the present invention, other resins and elastomers can be used in a small proportion within a range in which the effects of the present invention are exhibited.
Examples of such other resins include polyolefin resins such as polyimide resins, polyetherimide resins, polyurethane resins, silicone resins, polysulfone resins, and polyethylene, and resins such as polymethacrylate resins, phenol resins, and epoxy resins.

  Examples of elastomers other than the above-mentioned elastomers include isobutylene / isoprene rubber, styrene / butadiene rubber, ethylene / propylene rubber, MBS (methyl methacrylate / sterene / butadiene) rubber, which is a core-shell type elastomer, and MAS (methyl methacrylate / And acrylonitrile / styrene) rubber.

  In addition, in the resin composition of the present invention, additives known per se can be blended in a small proportion for imparting various functions to the molded article and improving the characteristics. These additives are used in usual amounts as long as the object of the present invention is not impaired.

  Examples of such additives include sliding agents (for example, PTFE particles), colorants (for example, pigments and dyes such as carbon black and titanium oxide), light diffusing agents (for example, acrylic crosslinked particles, silicon crosslinked particles, ultrathin glass flakes, carbonic acid Calcium particles), fluorescent dyes, inorganic phosphors (for example, phosphors having aluminate as a base crystal), fluorescent whitening agents, antistatic agents, inorganic and organic antibacterial agents, photocatalytic antifouling agents (for example, particulate oxidation) (Titanium, fine particle zinc oxide), radical generator, infrared absorber (heat ray absorber), photochromic agent and the like.

(Manufacture of thermoplastic resin composition)
Arbitrary methods are employ | adopted in order to manufacture the thermoplastic resin composition of this invention. For example, components A to I, and optionally other components are mixed thoroughly using premixing means such as a V-type blender, Henschel mixer, mechanochemical apparatus, extrusion mixer, etc. Examples thereof include granulation with a briquetting machine and the like, followed by melt kneading with a melt kneader typified by a vent type biaxial ruder, and pelletization with a device such as a pelletizer.

  As a method of supplying each component to the melt-kneader, (i) A component to I component and other components are each independently supplied to the melt-kneader, (ii) A component to I component and other components Examples thereof include a method in which a part is premixed and then supplied to the melt kneader independently of the remaining components. In addition, when there exists a liquid thing in the component to mix | blend, what is called a liquid injection apparatus or a liquid addition apparatus can be used for supply to a melt kneader.

  As the extruder, one having a vent capable of degassing moisture in the raw material and volatile gas generated from the melt-kneaded resin can be preferably used. From the vent, a vacuum pump is preferably installed for efficiently discharging generated moisture and volatile gas to the outside of the extruder. Examples of the melt kneader include a banbury mixer, a kneading roll, a single screw extruder, a multi-screw extruder having three or more axes, in addition to a twin screw extruder.

  The resin extruded as described above is directly cut into pellets, or after forming strands, the strands are cut with a pelletizer to be pelletized. When it is necessary to reduce the influence of external dust during pelletization, it is preferable to clean the atmosphere around the extruder. Although the shape of the obtained pellet can take general shapes, such as a cylinder, a prism, and a spherical shape, it is more preferably a cylinder. The diameter of such a cylinder is preferably 1 to 5 mm, more preferably 1.5 to 4 mm, and still more preferably 2 to 3.3 mm. On the other hand, the length of the cylinder is preferably 1 to 30 mm, more preferably 2 to 5 mm, and still more preferably 2.5 to 3.5 mm.

The resin composition obtained by the above method has a thermal conductivity of 0.6 to 20.0 W / mK, preferably 0.8 to 12.0 W / mK, and 1.0 to 7.0 W / mK. Is more preferable.
Moreover, the surface specific resistance of the resin composition obtained by the above method is 1.0 × 10 ^{11 to} 1.0 × 10 ⁵ Ω, preferably 5.0 × 10 ^{10 to} 5.0 × 10 ⁵ Ω. 1.0 × 10 ^{10 to} 1.0 × 10 ⁶ is more preferable, and 1.0 × 10 ^{10 to} 5.0 × 10 ⁶ is most preferable.

(Molding)
A molded product comprising the thermoplastic resin composition of the present invention can be usually obtained by injection molding the pellet. In such injection molding, not only ordinary molding methods but also injection compression molding, injection press molding, gas assist injection molding, foam molding (including a method of injecting a supercritical fluid), insert molding, in-mold coating molding, heat insulation Examples thereof include mold molding, rapid heating / cooling mold molding, two-color molding, sandwich molding, and ultra-high speed injection molding. In addition, either a cold runner method or a hot runner method can be selected for molding.

  Moreover, according to this invention, the thermoplastic resin composition of this invention can be extrusion-molded, and can also be made into shapes, such as various profile extrusion molded articles, a sheet | seat, a film. For forming sheets and films, an inflation method, a calendar method, a casting method, or the like can also be used. It is also possible to form a heat-shrinkable tube by applying a specific stretching operation.

Further, the thermoplastic resin composition of the present invention can be formed into a molded product by rotational molding or blow molding.
Furthermore, according to the present invention, the thermoplastic resin composition can be formed into a molded product by press molding or the like.

(surface treatment)
Further, the molded article of the present invention can be subjected to various surface treatments. As the surface treatment, various surface treatments such as a hard coat, a water / oil repellent coat, a hydrophilic coat, an antistatic coat, an ultraviolet absorption coat, an infrared absorption coat, and metalizing (evaporation) can be performed. Examples of the surface treatment method include liquid deposition, vapor deposition, thermal spraying, and plating. As the vapor deposition method, either a physical vapor deposition method or a chemical vapor deposition method can be used. Examples of physical vapor deposition include vacuum vapor deposition, sputtering, and ion plating. Examples of the chemical vapor deposition (CVD) method include a thermal CVD method, a plasma CVD method, and a photo CVD method.

By adding graphite having an apparent density of 0.15 g / cm ³ or less and having a pH of 4 to 10 when the graphite powder 5 g is dispersed in 100 g of water to the thermoplastic resin composition, metal corrosion is caused. The present inventors have found that a thermoplastic resin composition having low properties and excellent thermal conductivity can be obtained, and as a result, the present invention has been achieved.

The thermoplastic resin composition of the present invention is a thermoplastic resin comprising graphite having an apparent density of 0.15 g / cm ³ or less and a pH of an aqueous layer of 4 to 10 when 5 g of graphite powder is dispersed in 100 g of water. It is a thermoplastic resin composition that has less metal corrosiveness and is excellent in thermal conductivity and conductivity in the composition.

  This invention provides the resin composition which has the said characteristic which is not in a conventionally well-known composition by this structure, and a molded article consisting thereof. The thermoplastic resin composition of the present invention is extremely useful in various industrial applications such as the OA equipment field and the electrical and electronic equipment field, and satisfies good characteristics corresponding to housings and chassis molded products of OA equipment and electrical and electronic equipment. In particular, it is useful for a molded product of a product having a heat source such as an LSI, a CPU, an LED lamp, or a fixing device of a laser printer. Specifically, desktop PCs, notebook PCs, game machines (home game machines, arcade game machines, pachinko machines, slot machines, etc.), display devices (CRT, liquid crystal, plasma, projector, organic EL, etc.), and printers Suitable for housing and chassis moldings such as copiers, scanners and fax machines (including these multifunction devices).

  In addition, the thermoplastic resin composition of the present invention is useful for a wide variety of other applications, for example, portable information terminals (so-called PDAs), cellular phones, portable books (dictionaries etc.), portable televisions, recording media (CD, MD). , DVD, next-generation high-density disk, hard disk, etc.) drive, recording medium (IC card, smart media, memory stick, etc.) reader, optical camera, digital camera, parabolic antenna, electric tool, VTR, iron, hair dryer, Examples include rice cookers, microwave ovens, audio equipment, lighting equipment, refrigerators, air conditioners, air purifiers, negative ion generators, and typewriters. A resin product formed from the resin composition can be used. Other resin products include vehicle parts such as lamp reflectors, lamp housings, instrument panels, center console panels, deflector parts, car navigation parts, car audio visual parts, and auto mobile computer parts. As is clear from the above, the industrial effect exhibited by the present invention is extremely great.

  The form of the present invention considered to be the best by the present inventor is a collection of the preferable ranges of the above requirements. For example, typical examples are described in the following examples. Of course, the present invention is not limited to these forms.

Hereinafter, the present invention will be further described with reference to examples, but the present invention is not limited thereto. The following items were evaluated.
(I) Rigidity (flexural modulus)
The flexural modulus (MPa) was measured according to ISO178. The shape of the test piece was 80 mm long × 10 mm wide × 4 mm thick.
(Ii) Metal Corrosion Clamping using a mold having the shape shown in FIG. 1 (cavity size width 42 mm × length 24 mm × depth 3 mmt, insert for corrosion evaluation (20 mmφ) made with mold steel NAK80) After 500 shots are continuously molded by a 15T injection molding machine, the corrosion evaluation insert is removed from the mold, placed in a thermo-humidifier set at 50 ° C x 90% RH for 2 hours, and visually observed. Then, the presence or absence of corrosion on the mold mirror surface was determined. The criteria for determination are as follows.
○: Corrosion is 5% or less of the mirror surface, Δ: Corrosion is observed in 5 to 50% of the mirror surface, and X: Corrosion is observed in 50% or more of the mirror surface.
(Iii) Thermal conductivity Based on the unsteady heat ray method (probe method) described in JIS R 2618, it was measured with a rapid thermal conductivity measuring instrument QTM-500 manufactured by Kyoto Electronics Industry Co., Ltd. (test piece shape: 150 mm × 75 mm × 10 mm).
(Iv) Surface Specific Resistance A smooth flat test piece having a length of 50 mm, a width of 50 mm, a thickness of 2.0 mm, and a surface arithmetic average roughness (Ra) of 0.03 μm was produced by injection molding. The test piece was adjusted for one week in an environment of 23 ° C. and 50% humidity immediately after molding. Thereafter, the surface specific resistance (Ω) of the test piece was measured with an SM-8210 pole superinsulator made by Toa Denpa Kogyo Co., Ltd.

The following were used as raw materials.
(A component)
A-1: Linear aromatic polycarbonate resin powder synthesized by interfacial polycondensation from bisphenol A, p-tert-butylphenol as a terminal terminator, and phosgene (manufactured by Teijin Chemicals Ltd .: Panlite L-1225WP (product) Name), viscosity average molecular weight 22,500)
A-2: Acrylonitrile-styrene copolymer resin (manufactured by Daiichi Kori Co., Ltd .: STAREX HF5670 (trade name))
A-3: ABS resin (Nippon A & L Co., Ltd. bulk polymer: Santac UT-61 (trade name))
A-4: PET resin (manufactured by Teijin Chemicals Ltd .: TR-8580 (trade name))
A-5: Elastomer 1 (613 parts of dimethyl terephthalate, 185 parts of polytetramethylene glycol (average molecular weight 1000), 398 parts of tetramethylene glycol was polymerized by a conventional method using tetrabutoxytitanate as a catalyst, melting point 215 ° C., inherent A polyester block copolymer elastomer having a viscosity of 1.10 and a hard segment amount of 79% by weight was used.)
A-6: Elastomer 2 (175 parts of dimethyl isophthalate, 23 parts of dimethyl sebacate, 140 parts of hexamethylene glycol was subjected to a transesterification reaction with a dibutyltin diacetate catalyst and then polycondensed under reduced pressure to obtain an intrinsic viscosity of 1.06. An amorphous polyester (A) having no endothermic peak due to melting of crystals was obtained by DSC method, and polybutylene terephthalate having an intrinsic viscosity of 0.98 obtained separately by polycondensation to this polyester ( After drying the chip of a) and adding 145 parts and reacting at 240 ° C. for another 45 minutes, 0.1 part of phenylphosphonic acid was added to stop the reaction, and the polyester block copolymer elastomer and did.)
A-7: Modified polyphenylene ether resin (manufactured by GEM: 50 parts by weight of PPE (trade name) and A & M Styrene Co., Ltd .: 50 parts by weight of HIPS 433 (trade name) are uniformly mixed using a tumbler and preliminarily prepared. A mixture was prepared, and the obtained preliminary mixture was supplied to the first supply port (screw base) of a vent type twin screw extruder [TEX30XSST manufactured by Nippon Steel Works, Ltd.] having a diameter of 30 mmφ, and the cylinder temperature was 280 ° C. (It was melt-extruded and pelletized at a rotation speed of 180 rpm, a discharge rate of 15 kg / h, and a vent vacuum of 3 kPa to obtain a modified polyphenylene ether resin.)
A-9: Polyphenylene sulfide resin (manufactured by Polyplastics Co., Ltd .: Fortron 0220A9 (trade name))

(B component)
B-1: Natural phosphorus graphite (apparent specific gravity 0.09 g / cm ³ , pH = 6.5, particle thickness 0.5 μm, particle diameter 5 μm)
B-2: flake graphite (manufactured by Nippon Graphite Co., Ltd .: UP-20 (trade name) apparent specific gravity 0.10 g / cm ³ , pH = 6.7, particle thickness 0.3 μm, particle diameter 20 μm)
B-3: flake graphite (manufactured by Nippon Graphite Co., Ltd .: UP-10 (trade name) apparent specific gravity 0.05 g / cm ³ , pH = 6.6, particle thickness 0.3 μm, particle diameter 10 μm)
(Other than B component)
B-4: Expanded graphite (manufactured by Nippon Graphite Co., Ltd .: GR15 (trade name) apparent specific gravity 0.09 g / cm ³ , pH = 3.0, particle thickness 2 μm, particle diameter 15 μm)
B-5: Natural phosphorus graphite (apparent specific gravity 0.20 g / cm ³ , pH = 6.5, particle thickness 7 μm, particle diameter 19 μm)
B-6: Expanded graphite (manufactured by Nishimura Graphite Co., Ltd .: E-40 (trade name) apparent specific gravity 0.02 g / cm ³ , pH = 3.5, particle thickness 3 μm, particle diameter 350 μm)

(C component)
C-1: Mica (manufactured by Hayashi Kasei Co., Ltd .: Mascobite mica MC250 (trade name) average particle size 40 μm)
C-2: Mica (manufactured by Hayashi Kasei Co., Ltd .: mascobite mica MC40 (trade name) average particle size 250 μm)
C-3: Talc (Katsumiyama Mining Co., Ltd .: Victorite SG-A (trade name), average particle size 15 μm)
C-4: Wollastonite (manufactured by Shimizu Kogyo Co., Ltd .: H-1250F (trade name, number average particle diameter 2.1 μm, weighted average fiber length 26 μm)

(D component)
D-1: Glass fiber (“3PE937” manufactured by Nitto Boseki Co., Ltd.); fiber diameter: 13 μm, cut length: 3 mm, aminosilane treatment-epoxy / urethane-based converged glass fiber, treatment agent adhesion amount: about 1.0%, bulk Density: 0.80 g / cm ³ )
(E component)
E-1: Granular glass flakes [Fureka REFG-301 manufactured by Nippon Sheet Glass Co., Ltd., median average particle size 140 μm, thickness 5 μm, Mohs hardness: 6.5 by standard sieving method]
(F component)
F-1: Montanic acid ester [“WAX-E powder” manufactured by Clariant Japan Co., Ltd.]
F-2: Acid-modified polyolefin wax [Mitsubishi Kasei Co., Ltd. Diacarna 30M]
(G component)
G-1: Phosphorus stabilizer (manufactured by Daihachi Chemical Industry Co., Ltd .: TMP trimethyl phosphate)
(H component)
H-1: Carbonate oligomer of brominated bisphenol A (manufactured by Teijin Chemicals Ltd .; Fireguard FG-7000 (trade name))
H-2: Bisphenol A bis (diphenyl phosphate) (CR-841 (trade name) manufactured by Daihachi Chemical Industry Co., Ltd.)
(I component)
I-1: Polytetrafluoroethylene having fibril-forming ability (Polyflon MPA FA500 (trade name) manufactured by Daikin Industries, Ltd.)

[Examples 1 to 30, Comparative Examples 1 to 4]
The components shown in Tables 1 to 3 were uniformly mixed using a tumbler to prepare a premix. When supplying to the tumbler, the G-1 and I-1 ingredients are mixed with the powder of A-1 uniformly to make a 10 wt% master, and the master is supplied to the tumbler so that the desired addition amount is obtained. did. The obtained preliminary mixture is supplied to the first supply port (screw base) of a vent type twin screw extruder [TEX30XSST manufactured by Nippon Steel Works, Ltd.] having a diameter of 30 mmφ, and the cylinder temperature is 280 ° C. and the screw rotation speed is 180 rpm. It was melt-extruded and pelletized at an amount of 15 kg / h and a vent vacuum of 3 kPa.

  The obtained pellets were dried with a hot air circulation dryer at 110 ° C. for 5 hours. After drying, test pieces for various evaluations were molded at a cylinder temperature of 300 ° C. and a mold temperature of 80 ° C. using an injection molding machine (Toshiba Machine Co., Ltd .: IS-150EN and FANUC Co., Ltd .: AUTOSHOT15T). Each characteristic was measured using these molded articles. The results are shown in Tables 1 to 3.

From the above table, heat in which the thermoplastic resin of the present invention is blended with graphite having an apparent density of 0.15 g / cm ³ or less and a pH of the aqueous layer of 4 to 10 when 5 g of graphite powder is dispersed in 100 g of water. It can be seen that the thermoplastic resin composition has a thermoplastic resin composition that has low metal corrosivity and excellent thermal conductivity.

It is a schematic diagram of a mold (cavity size width 42 mm × length 24 mm × depth 3 mmt, insert for corrosion evaluation (20 mmφ) inserted in mold steel material NAK80) used for evaluation of mold corrosiveness.

Explanation of symbols

1. Gate 2. Sprue 3. Nest for corrosion evaluation (steel NAK80, 20mmφ)

Claims (25)

Graphite (99 to 20 parts by weight of a thermoplastic resin (component A), an apparent density of 0.15 g / cm ³ or less, and a pH of an aqueous layer of 4 to 10 when 5 g of graphite powder is dispersed in 100 g of water ( B component) A thermoplastic resin composition comprising 1 to 80 parts by weight. The graphite (component B) is graphite obtained by pulverizing at least one graphite selected from the group consisting of natural phosphorous graphite, pyrolytic graphite, and quiche graphite to an apparent density of 0.15 g / cm ³ or less. 1. The thermoplastic resin composition according to 1.   The thermoplastic resin composition according to claim 2, wherein the graphite (component B) is graphite having a particle thickness of 5 µm or less and a particle diameter of 8 to 1000 µm.   The thermoplastic resin composition according to any one of claims 1 to 3, wherein the thermoplastic resin (component A) is a thermoplastic resin containing 50% by weight or more of a polycarbonate resin.   The thermoplastic resin (component A) is at least one thermoplastic selected from the group consisting of polycarbonate resin (component A-1), styrene resin (component A-2) and polyester resin (component A-3). The thermoplastic resin composition according to any one of claims 1 to 4, comprising a resin, wherein the A-1 component is 50 parts by weight or more with respect to 100 parts by weight of A-1 to A-3 in total.   The thermoplastic resin composition according to any one of claims 1 to 3, wherein the thermoplastic resin (component A) is a thermoplastic resin containing 50% by weight or more of a thermoplastic elastomer.   The thermoplastic resin (A component) is a thermoplastic resin containing at least 50% by weight of at least one thermoplastic resin selected from the group consisting of a polyphenylene ether resin, a polyphenylene sulfide resin and a polyarylate resin. The thermoplastic resin composition according to any one of the above.   The thermoplastic resin composition according to any one of claims 1 to 7, comprising 1 to 200 parts by weight of an inorganic filler (component C) per 100 parts by weight of the total of components (A) and (B). .   The thermoplastic resin composition according to claim 8, wherein the inorganic filler (component C) comprises at least one inorganic mineral selected from the group consisting of mica, talc and wollastonite.   The thermoplastic resin composition according to any one of claims 1 to 9, comprising 1 to 200 parts by weight of a fibrous filler (component D) per 100 parts by weight of the total of components (A) and (B). object.   The thermoplastic resin composition according to claim 10, wherein the fibrous filler (component D) comprises at least one fibrous filler selected from the group consisting of glass fiber, glass milled fiber, carbon fiber, and metal-coated carbon fiber.   1 to 200 parts by weight of at least one non-fibrous glass filler (E component) selected from the group consisting of glass flakes, glass balloons and glass beads per 100 parts by weight of the total of components (A) and (B) The thermoplastic resin composition according to any one of claims 1 to 11.   The thermoplastic resin composition according to any one of claims 1 to 12, comprising 0.01 to 5 parts by weight of a lubricant (component F) per 100 parts by weight of the total of components (A) and (B). .   The thermoplastic resin composition according to claim 13, wherein the lubricant is an acidic group-containing lubricant.   The thermoplastic resin composition according to claim 14, wherein the acidic group-containing lubricant is an olefin wax having a carboxyl group and / or an acid anhydride group thereof.   The thermoplastic resin composition according to claim 13, wherein the lubricant is an ester group-containing wax.   The thermoplasticity according to any one of claims 1 to 16, comprising 0.01 to 3 parts by weight of a phosphorus stabilizer (G component) per 100 parts by weight of the total of components (A) and (B). Resin composition.   The thermoplastic resin composition according to any one of claims 1 to 17, comprising 1 to 50 parts by weight of a flame retardant (H component) per 100 parts by weight of the total of components (A) and (B). .   The thermoplastic resin composition according to claim 18, wherein the flame retardant (H component) is an organic halogen flame retardant or a phosphorus flame retardant.   The thermoplastic resin composition according to claim 18 or 19, comprising 0.01 to 3 parts by weight of a fluorine-containing anti-dripping agent (component I) per 100 parts by weight of the total of components (A) and (B).   The thermoplastic resin composition according to any one of claims 1 to 20, which has a thermal conductivity of 0.6 to 20 W / mK. Surface resistivity of 1.0 × ¹⁰ 11 ~1.0 × thermoplastic resin composition according to any one of claims 1 to 21 is 10 ⁵ Omega.   An injection-molded article comprising the thermoplastic resin composition according to any one of claims 1 to 22.   A press-molded article comprising the thermoplastic resin composition according to any one of claims 1 to 22.   An extruded product comprising the thermoplastic resin composition according to any one of claims 1 to 22.

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