JP2011236288A - Resin composition excellent in metal wearing property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin composition having excellent metal wearing properties, particularly, antiwear properties on the circumference of a screw of a molding machine and on a die, and having high strength, high dimensional accuracy and flame retardancy, and suitable for molded articles for office equipment components.SOLUTION: The resin composition contains: (A) 100 pts.wt. of a thermoplastic resin (A component); (B) 10 to 150 pts.wt. of a plate-like inorganic filler (B component) having an average particle diameter of 100 μm or smaller; (C) 0 to 30 pts.wt. of a flame retardant (C component); (D) 0 to 30 pts.wt. of filler (D component) excluding the B component; and (E) 0 to 5 pts.wt. of a fluorine-containing drop preventing agent (E component).

Description

  The present invention relates to a resin composition excellent in metal wear. More specifically, the present invention is excellent in metal wear, particularly wear resistance of a molding machine screw and a mold by containing a specific proportion of a plate-like inorganic filler having a specific particle size, and has high strength, high dimensional accuracy, The present invention relates to a flame retardant resin composition having flame retardancy and suitable for office equipment component molded articles.

  In recent years, mechanical parts such as laser beam printers, copiers, and projectors, office machines such as household appliances, electrical appliances, various frames and optical system units (hereinafter sometimes simply referred to as “mechanical parts”). In many cases, a plastic material used in a certain type is required to have high rigidity, high strength, high dimensional accuracy, low warpage, and good flame retardancy. Many proposals have already been made for plastic materials for such mechanical parts. In particular, among the mechanical components, in the optical system unit, a plate-like filler is preferably used from the viewpoints of product warpage, ease of obtaining initial dimensions, thermal deformation during use, and low anisotropy. Also, from the viewpoint of cost reduction in production, a plastic molding material with low wear of the metal part of an injection molding machine or a mold is preferred, and it is considered that a plate-like filler is excellent also in this respect.

  However, these mechanical parts require dimensional accuracy and are required to be smaller and thinner. In addition, as part of cost reduction in production, the purpose is to shorten the molding cycle, resin temperature, mold There is a tendency to lower the temperature and form under more severe conditions. Under these harsh conditions, the viscosity of the molten resin during molding is high, and if a plate-like filler having a specific particle size or more is used, the screw, check valve, heating cylinder, and mold of the injection molding machine There is a problem that the wear of a specific part around the gate becomes intense.

  In Patent Document 1, talc having a specific particle size and mica and / or wollastonite are used in combination, and by containing a flame retardant in a specific ratio, it has appropriate rigidity, strength, dimensional accuracy, and wears the mold. A flame retardant thermoplastic resin composition suitable for a chassis molded article having characteristics that are difficult to cause is disclosed. In Patent Document 2, an aromatic polycarbonate resin and a specific ratio of acrylonitrile-styrene copolymer (AS resin) are combined to form a resin component, and mica having a specific particle diameter is combined with a specific ratio of talc or wollastonite as an inorganic filler. A resin composition that uses an organic phosphorus compound as a flame retardant, uses a fluorine-containing dripping agent, and further blends these components at a certain ratio is a molded product having high rigidity, high strength, and high dimensional accuracy. It is disclosed that there are obtained advantages that good flame retardancy is expressed by using a relatively small amount of flame retardant and that the wear of the mold is extremely small. However, in any of the documents, sufficient studies on the wear resistance of metals under severe conditions have not been made, and furthermore, the wearability of the molds referred to in these documents is relatively limited among molds. It is an evaluation of the wearability in a loose part, and there is room for improvement because the examination is not sufficiently conducted on the part with severe conditions, the wearability in a severe usage method, or the metal wear around the screw of the injection molding machine.

JP 2004-323565 A JP 2004-002737 A

  The object of the present invention is to provide a resin composition suitable for office equipment component molded articles having excellent metal wear resistance, particularly wear resistance of a molding machine screw and a mold, and high strength, high dimensional accuracy, and flame retardancy. To provide things.

  As a result of intensive studies, the present inventor can solve the above-mentioned problems by including a specific proportion of a plate-like inorganic filler having a specific particle diameter, particularly a plate-like inorganic filler obtained by a specific pulverization method. I found. The present invention has been completed by further study.

According to the present invention, the above problems are solved by (1) (A) 100 parts by weight of the thermoplastic resin (A component), (B) a plate-like inorganic filler (B component) 10 to 150 having an average particle size of 100 μm or less. Parts by weight, (C) flame retardant (component C) 0 to 30 parts by weight, (D) fillers other than component B (component D) 0 to 30 parts by weight, and (E) fluorine-containing anti-dripping agent (component E) This is achieved by a resin composition containing 0 to 5 parts by weight.
One of the preferred embodiments of the present invention is that (2) the thermoplastic resin (component A) is at least selected from the group consisting of an aromatic polycarbonate resin (component A-1) and a styrene resin (component A-2). It is a resin composition of the said structure (1) which is 1 type of thermoplastic resins.
One of the preferred embodiments of the present invention is the resin composition having the above constitution (1) or (2), wherein (3) B component is mica and / or talc.
One of the preferred embodiments of the present invention is the resin composition having the above constitution (3), wherein (4) component B is mica pulverized by a wet pulverization method.
One of the preferred embodiments of the present invention is the resin composition according to any one of the above constitutions (1) to (4), wherein (5) component C is an organic phosphate compound.
One of the preferred embodiments of the present invention is the above constitutions (1) to (5), wherein (6) the D component is at least one filler selected from the group consisting of wollastonite, glass fiber, and carbon fiber. ).
One of the preferred embodiments of the present invention is the resin composition according to any one of the above constitutions (1) to (6), wherein (7) E component is a fluorine-containing anti-dripping agent having fibril forming ability.
One of the preferred embodiments of the present invention is (8) a molded article made of the above resin composition, and in particular, a molded article that is a mechanical part of office machines, household appliances, and electric and electronic equipment.

Details of the present invention will be described below.
<About component A>
The thermoplastic resin of component A used in the present invention is not basically limited, and thermoplastic resins generally used for mechanical parts of office machines, household appliances, and electric / electronic equipment are preferably used. The Examples of the thermoplastic resin include polyolefin resins such as polyethylene resin, polypropylene resin, poly-4-methylpentene-1, and cyclic polyolefin resin, polystyrene resin, HIPS resin, MS resin, ABS resin, AS resin, and AES resin. , ASA resin, MBS resin, MAS resin, hydrogenated polystyrene resin, styrene resin such as SMA resin, acrylic resin such as polymethyl methacrylate, modified polyphenylene oxide resin, polyamide resin, polycarbonate resin, polyphenylene ether resin, PET resin, Polyester resins such as PBT resin, thermoplastic resins such as polyarylate resin, styrene thermoplastic elastomer, olefin thermoplastic elastomer, polyester elastomer, polyamid Systems elastomers, and thermoplastic elastomers such as acrylic elastomers.

  The more preferable thermoplastic resin (component A) of the present invention is at least one thermoplastic resin selected from the group consisting of polycarbonate resin (component A-1) and styrene resin (component A-2). Among them, a thermoplastic resin composed of the A-1 component and the A-2 component, wherein the A-1 component is 50 parts by weight or more out of the total 100 parts by weight of the A-1 component and the A-2 component, is more preferable. Is a thermoplastic resin of 60 parts by weight or more, most preferably 70 parts by weight or more.

[Polycarbonate resin]
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 1.3 × 10 ^{4 to} 4.0 × 10 ⁴ , more preferably 1.5 × 10 ^{4 to} 3.8 × 10 ⁴ . The viscosity average molecular weight (M) of the aromatic polycarbonate resin is obtained by inserting the specific viscosity (ηsp) 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.

[Styrene resin]
Styrene resins include homopolymers or copolymers of styrene derivatives such as styrene, α-methylstyrene, and p-methylstyrene, and copolymers of these monomers with vinyl monomers such as acrylonitrile and methyl methacrylate. Etc. Furthermore, diene rubbers such as polybutadiene, ethylene / propylene rubber, acrylic rubber, and composites that have a structure in which the polyorganosiloxane rubber component and the polyalkyl (meth) acrylate rubber component are intertwined so that they cannot be separated. Examples of the rubber (hereinafter referred to as IPN type rubber) include styrene and / or styrene derivatives, or those obtained by graft polymerization of styrene and / or styrene derivatives and other vinyl monomers. Examples of such styrene resins include polystyrene, styrene / butadiene / styrene copolymer (SBS), hydrogenated styrene / butadiene / styrene copolymer (hydrogenated SBS), hydrogenated styrene / isoprene / styrene copolymer (water). SIS), impact polystyrene (HIPS), acrylonitrile / styrene copolymer (AS resin), acrylonitrile / butadiene / styrene copolymer (ABS resin), methyl methacrylate / butadiene / styrene copolymer (MBS resin), methyl Methacrylate / acrylonitrile / butadiene / styrene copolymer (MABS resin), acrylonitrile / acrylic rubber / styrene copolymer (AAS resin), acrylonitrile / ethylene propylene rubber / styrene copolymer (AES resin) and styrene / IP Resins such as type rubber copolymer or mixtures thereof.

  Such a styrenic thermoplastic resin may have a high stereoregularity such as syndiotactic polystyrene by using a catalyst such as a metallocene catalyst at the time of production. Further, in some cases, polymers and copolymers having a narrow molecular weight distribution, block copolymers, polymers with high stereoregularity, and copolymers obtained by methods such as anion living polymerization and radical living polymerization are used. It is also possible. For the purpose of improving the compatibility with the polycarbonate resin, it is possible to copolymerize a compound having a functional group such as maleic anhydride or N-substituted maleimide with the styrenic resin.

  Among these, acrylonitrile / styrene copolymer (AS resin) and acrylonitrile / butadiene / styrene copolymer (ABS resin) are preferable from the viewpoint of affinity with the polycarbonate resin. It is also possible to use a mixture of two or more styrene resins.

The AS resin used in the present invention is a thermoplastic copolymer obtained by copolymerizing a vinyl cyanide compound and an aromatic vinyl compound. Examples of such vinyl cyanide compounds include those described above, and acrylonitrile is particularly preferred. As the aromatic vinyl compound, those described above can be used as well, but styrene and α-methylstyrene are preferably used. The proportion of each component in the AS resin is preferably 5 to 50% by weight of vinyl cyanide compound, more preferably 15 to 35% by weight, and preferably 95% of aromatic vinyl compound when the total is 100% by weight. -50% by weight, more preferably 85-65% by weight. Furthermore, the above-mentioned other copolymerizable vinyl compounds can be used by mixing with these vinyl compounds, and the content ratio thereof is preferably 15% by weight or less in the AS resin component. Moreover, conventionally well-known various things can be used for the initiator, chain transfer agent, etc. which are used by reaction as needed. Such an AS resin may be produced by any of bulk polymerization, suspension polymerization, and emulsion polymerization, but is preferably bulk polymerization. The copolymerization method may be either one-stage copolymerization or multistage copolymerization. Further, the reduced viscosity of the AS resin is preferably 0.2 to 1.0 dl / g, more preferably 0.3 to 0.5 dl / g. The reduced viscosity is a value obtained by precisely weighing 0.25 g of AS resin and measuring a solution obtained by dissolving in 50 ml of dimethylformamide over 2 hours in an environment of 30 ° C. using an Ubbelohde viscometer. A viscometer having a solvent flow time of 20 to 100 seconds is used. The reduced viscosity is determined from the following formula from the solvent flow down seconds (t ₀ ) and the solution flow down seconds (t).
Reduced viscosity (η _sp / C) = {(t / t ₀ ) −1} /0.5
When the reduced viscosity is less than 0.2 dl / g, the impact is lowered, and when it exceeds 1.0 dl / g, the fluidity is deteriorated.

  The ABS resin used in the present invention is a mixture of a thermoplastic graft copolymer obtained by graft polymerization of a vinyl cyanide compound and an aromatic vinyl compound to a diene rubber component, and a copolymer of a vinyl cyanide compound and an aromatic vinyl compound. It is. As the diene rubber component forming this ABS resin, for example, rubber having a glass transition temperature of −30 ° C. or less such as polybutadiene, polyisoprene and styrene-butadiene copolymer is used, and the proportion thereof is 100% by weight of the ABS resin component. The content is preferably 5 to 80% by weight, more preferably 8 to 50% by weight, and particularly preferably 10 to 30% by weight. Examples of the vinyl cyanide compound grafted onto the diene rubber component include those described above, and acrylonitrile is particularly preferably used. As the aromatic vinyl compound grafted onto the diene rubber component, those described above can be used as well, and styrene and α-methylstyrene are particularly preferably used. The ratio of the component grafted to the diene rubber component is preferably 95 to 20% by weight, particularly preferably 90 to 50% by weight, based on 100% by weight of the ABS resin component. Furthermore, it is preferable that the vinyl cyanide compound is 5 to 50% by weight and the aromatic vinyl compound is 95 to 50% by weight with respect to 100% by weight of the total amount of the vinyl cyanide compound and the aromatic vinyl compound. Further, methyl (meth) acrylate, ethyl acrylate, maleic anhydride, N-substituted maleimide and the like can be mixed and used for some of the components grafted to the diene rubber component, and the content ratio thereof is in the ABS resin component. What is 15 weight% or less is preferable. Furthermore, conventionally well-known various things can be used for the initiator, chain transfer agent, emulsifier, etc. which are used by reaction as needed.

  In the ABS resin of the present invention, the rubber particle diameter is preferably 0.1 to 5.0 μm, more preferably 0.2 to 3.0 μm, and particularly preferably 0.3 to 1.5 μm. As the distribution of the rubber particle diameter, either a single distribution or a rubber particle having two or more peaks can be used, and the rubber particles form a single phase in the morphology. Alternatively, it may have a salami structure by containing an occluded phase around the rubber particles.

In addition, it is well known that the ABS resin contains a vinyl cyanide compound and an aromatic vinyl compound that are not grafted to the diene rubber component, and the ABS resin of the present invention is free of the occurrence of such polymerization. The polymer component may be contained. The reduced viscosity of the copolymer comprising such free vinyl cyanide compound and aromatic vinyl compound is preferably 0.2 to 1.0 dl / g in reduced viscosity (30 ° C.) determined by the method described above. Preferably it is 0.3-0.7 dl / g.
The ratio of the grafted vinyl cyanide compound and aromatic vinyl compound is preferably 20 to 200%, more preferably 20 to 70% in terms of graft ratio (% by weight) with respect to the diene rubber component. is there.

  Such an ABS resin may be produced by any of bulk polymerization, suspension polymerization, and emulsion polymerization, but is preferably bulk polymerization. In the case of bulk polymerization, an alkali metal salt derived from an emulsifier and the like is substantially not contained, and thus the thermal stability of the polycarbonate resin composition can be kept better. Further, the copolymerization may be carried out in one step or in multiple steps. Moreover, what blended the vinyl compound polymer obtained by copolymerizing an aromatic vinyl compound and a vinyl cyanide component separately to the ABS resin obtained by this manufacturing method can also be used preferably.

<About B component>
The plate-like inorganic filler having an average particle size of 100 μm or less used as the component B in the present invention preferably has a Mohs hardness of 5 or less, and examples thereof include mica and talc. Mica particularly preferably used in the present invention is mica represented by muscobite mica (muscovite) and phlogopite (phlogopite). From the viewpoint of the rigidity of the resin composition, mascobite mica is preferable. The hardness is about 3. Muscovite mica can achieve higher rigidity and strength than other mica such as phlogopite, and solves the problems of the present invention at a better level. In addition, mica pulverization methods include dry pulverization method in which mica rough is pulverized with a dry pulverizer such as a pin mill, impact mill, jet mill, etc., and mica rough is roughly pulverized with a dry powder pulverizer, In addition, there is a wet pulverization method in which the slurry is washed with water and dehydrated, and the remaining water is pulverized with a wet pulverizer such as a roller mill as a pulverization aid. However, any of these pulverization methods can be used. When comparing with the same particle size, mica powder obtained by the wet pulverization method is more preferable because higher rigidity is obtained when the same resin composition is used. Moreover, mica obtained by a wet pulverization method is more preferable from the viewpoint of metal wear, which is a feature of the present invention. In addition, since mica is a naturally occurring mineral, it contains mineral iron or sand containing quartz with a Mohs hardness of 7, and also wear iron generated from a pulverizer, particularly a dry milling pin mill, It is preferably manufactured through a sand separation process by air classification and a deironing process by magnetic separation process. The mica thus obtained may be surface-treated with various surface treatment agents such as a silane coupling agent, a higher fatty acid ester, and a wax, and further a sizing agent such as various resins, higher fatty acid esters, and waxes. It may be granulated and granulated.

The average particle size of the component B can be measured by a known method such as a microtrack laser method, and the average particle size is 100 μm or less, preferably 5 to 85 μm, more preferably 10 to 70 μm, and particularly preferably 20 ~ 60 μm. If the average particle size is too small, the impact strength may decrease. Furthermore, the thermal stability and degradation of the aromatic polycarbonate, which is a preferred resin in the present invention, may be deteriorated. On the other hand, if it exceeds 100 μm, the rigidity is improved, but the metal wear is remarkably deteriorated. As the thickness of the component B, a thickness of 0.001 to 10 μm actually measured by observation with an electron microscope can be used.
Content of B component is 10-150 weight part with respect to 100 weight part of A component, Preferably it is 15-120 weight part, and 20-100 weight part is more preferable. When the component B is too small, the sufficient rigidity is difficult to obtain, and when it exceeds the above range, it is difficult to produce the composition using an extruder, which is not industrially useful.

<About component C>
The resin composition of the present invention contains 0 to 30 parts by weight of a flame retardant as the C component with respect to 100 parts by weight of the A component.
Such a flame retardant (C component) is not particularly limited, and flame retardants for resins such as halogen flame retardants, phosphorus flame retardants, salt flame retardants, and silicon flame retardants can be used. Among these, phosphorus-based flame retardants having an excellent balance between environmental performance and flame retardant performance, particularly organophosphate compounds are preferable.

  Preferred examples of the organic phosphate compound include phosphate esters, phosphonate esters, and phosphazene oligomers. Further, as the phosphate ester, a compound represented by the following formula (1) is suitable.

[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。]

[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 in which n is an integer of 1 to 3 can be mentioned.
Content of C component is 0-30 weight part with respect to 100 weight part of A component, Preferably it is 1-25 weight part, 2-20 weight part is more preferable, 3-15 weight part is especially preferable. If the amount of the flame retardant exceeds the above range, the composition may be deteriorated in heat resistance and physical properties.

<About D component>
It is preferable that the resin composition of this invention contains fillers (D component) other than B component. Typical fillers for component D include reinforcing fillers formulated for the purpose of improving the rigidity and strength of flame retardant resin compositions, inorganic pigments formulated for the purpose of coloring thermoplastic resin compositions, and the like. Is exemplified. Reinforcing fillers include various glass fibers (chopped strands, milled fibers, flat cross-section glass fibers, etc.), glass beads, glass balloons, carbon fibers, carbon beads, wollastonite, calcium carbonate, various inorganic whiskers, metal fibers, metals Examples thereof include coated glass fiber and metal-coated carbon fiber. Among these, at least one selected from wollastonite, glass fiber, and carbon fiber is preferable, and at least one selected from glass fiber and carbon fiber is more preferable from the viewpoint of impact strength. Furthermore, glass fibers are particularly suitable. On the other hand, typical examples of the inorganic filler blended as the colorant include titanium dioxide, zinc oxide, zinc sulfide, and iron oxide. Titanium dioxide is most preferably used.
Content of D component is 0-30 weight part with respect to 100 weight part of A component, Preferably it is 2-25 weight part, More preferably, it is 4-20 weight part. When the amount of the filler exceeds the above range, the anisotropy becomes too large, the moldability is remarkably impaired, and it is not suitable for practical use.

<About E component>
The resin composition of the present invention preferably contains a fluorine-containing anti-dripping agent (E component). By containing this fluorine-containing anti-drip agent, good flame retardancy can be achieved without impairing the physical properties of the molded product.

  Examples of the fluorine-containing anti-drip agent include a fluorine-containing polymer having a fibril-forming ability. Examples of such a polymer include polytetrafluoroethylene and tetrafluoroethylene copolymers (for example, tetrafluoroethylene / hexafluoropropylene copolymer). For example, partially fluorinated polymers as disclosed in US Pat. No. 4,379,910, and polycarbonate resins produced from fluorinated diphenols. 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., and Polyflon MPAFA500 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 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 A3800” (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, 1 to 60% by weight of PTFE is preferable in 100% by weight of the PTFE mixture, and more preferably 5 to 55% by weight. When the ratio of PTFE is within such a range, good dispersibility of PTFE can be achieved. In addition, the ratio of the said E 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.

  Content of E component is 0-5 weight part with respect to 100 weight part of A component, Preferably it is 0.05-3 weight part, More preferably, it is 0.1-1 weight part. When the amount of the fluorine-containing anti-drip agent exceeds the above range, PTFE is not preferable because it not only precipitates on the surface of the molded product and causes poor appearance but also increases the cost of the resin composition.

<About other ingredients>
In addition to the heat stabilizer, antioxidant, ultraviolet absorber, antistatic agent, mold release agent, foaming agent, dye / pigment, flame retardant resin composition of the present invention within the range where the effects of the present invention are exhibited. A fuel aid or the like can also be blended.

  Examples of the heat stabilizer include phosphorus-based heat stabilizers such as phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid, and esters thereof. Specific examples thereof include triphenyl phosphite, trisnonylphenyl phosphite. , Tris (2,4-di-tert-butylphenyl) 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, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,2-methylene bis (4 6-di- phosphite compounds such as ert-butylphenyl) octyl phosphite, bis (nonylphenyl) pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, tributyl phosphate, trimethyl Phosphate compounds such as phosphate, tricresyl phosphate, triphenyl phosphate, trichlorophenyl phosphate, triethyl phosphate, diphenyl cresyl phosphate, diphenyl monoorthoxenyl phosphate, tributoxyethyl phosphate, dibutyl phosphate, dioctyl phosphate, diisopropyl phosphate, Furthermore, tetrakis (2,4-di-tert-butylphenyl) -4,4 ′ is another phosphorus-based heat stabilizer. Biphenylene diphosphonite, tetrakis (2,4-di-tert-butylphenyl) -4,3′-biphenylenediphosphonite, tetrakis (2,4-di-tert-butylphenyl) -3,3′-biphenylenedi Examples thereof include phosphonite compounds such as phosphonite and bis (2,4-di-tert-butylphenyl) -4-biphenylenephosphonite. Among these, trisnonylphenyl phosphite, distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, tris (2,4-di-tert-butylphenyl) Phosphite, triphenyl phosphate, trimethyl phosphate, tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite, bis (2,4-di-tert-butylphenyl) -4- Biphenylene phosphonite is preferred. These heat stabilizers may be used alone or in admixture of two or more. The blending amount of the heat stabilizer is preferably 0.0001 to 1 part by weight, more preferably 0.0005 to 0.5 part by weight, and 0.001 to 0.3 part by weight based on 100 parts by weight of the component A. Further preferred.

  Examples of the antioxidant include pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tetrakis (3-lauryl thiopropionate), glycerol-3-stearyl thiopropionate, triethylene glycol-bis [3- (3-t-butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol-bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], penta Erythritol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,3 , 5-trimethyl-2,4,6-tris (3,5-di-t-butyl 4-hydroxybenzyl) benzene, N, N-hexamethylenebis (3,5-di-t-butyl-4-hydroxy-hydrocinnamide), 3,5-di-t-butyl-4-hydroxy- Benzylphosphonate-diethyl ester, tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, 4,4′-biphenylenediphosphosphinic acid tetrakis (2,4-di-t-butylphenyl), 3,9-bis {1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl} -2,4,8,10-tetraoxaspiro (5,5) Undecane etc. are mentioned. These antioxidants may be used alone or in admixture of two or more. The amount of the antioxidant is preferably 0.0001 to 1 part by weight, more preferably 0.0005 to 0.5 part by weight, and 0.001 to 0.3 part by weight based on 100 parts by weight of the component A. Further preferred.

  Examples of the ultraviolet absorber include benzophenone-based ultraviolet absorbers represented by 2,2′-dihydroxy-4-methoxybenzophenone, and, for example, 2- (3-tert-butyl-5-methyl-2-hydroxyphenyl) -5. -Chlorobenzotriazole, 2- (3,5-di-tert-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2,2'-methylenebis [4- (1,1,3,3-tetramethyl Butyl) -6- (2H-benzotriazol-2-yl) phenol], 2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole and 2- (3 , 5-Di-tert-amyl-2-hydroxyphenyl) benzotriazole-based UV absorption represented by benzotriazole Agents are exemplified. Further, hindered amine light stabilizers typified by bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and the like Can also be used. These ultraviolet absorbers and light stabilizers may be used alone or in admixture of two or more. The blending amount of the ultraviolet absorber and the light stabilizer is preferably 0.0001 to 1 part by weight, more preferably 0.0005 to 0.5 part by weight, and 0.001 to 0. More preferred is 3 parts by weight.

  Examples of the antistatic agent include polyether ester amide, glycerin monostearate, ammonium dodecylbenzenesulfonate, phosphonium dodecylbenzenesulfonate, maleic anhydride monoglyceride, maleic anhydride diglyceride and the like. These antistatic agents may be used alone or in admixture of two or more. The blending amount of the antistatic agent is preferably 0.0001 to 1 part by weight, more preferably 0.0005 to 0.5 part by weight, and 0.001 to 0.3 part by weight based on 100 parts by weight of the component A. Is more preferable.

  Examples of the releasing agent include olefin wax, silicone oil, organopolysiloxane, higher fatty acid ester wax of monohydric or polyhydric alcohol, paraffin wax, beeswax and the like. Of these, higher fatty acid ester waxes of monohydric or polyhydric alcohols are preferred, and specifically, stearyl stearate, glycol dimontanate, glycol dibehenate, glycol distearate, glycerin tristearate, pentaerythritol. Examples thereof include tetrastearate, dipentaerythritol hexastearate, poly (pentaerythritol adipate) stearate, and poly (dipentaerythritol adipate) stearate. These release agents may be used alone or in combination of two or more. The amount of the release agent is preferably 0.005 to 2 parts by weight with respect to 100 parts by weight of component A.

<Manufacture of flame retardant resin composition>
The flame-retardant resin composition of the present invention is produced by mixing the above components simultaneously or in any order with a mixer such as a tumbler, V-type blender, nauter mixer, Banbury mixer, kneading roll, extruder or the like. be able to. Preferably, melt kneading with a twin-screw extruder is preferred, and at that time, the B component and D component are preferably fed from the second feed port into the other melt-mixed components by a side feeder or the like.

  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 3.5 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 4 mm.

  The composition thus obtained can be easily molded by a known method such as injection molding, extrusion molding, compression molding, or rotational molding, and injection molding is particularly preferable. In such injection molding, not only a normal molding method but also injection compression molding, injection press molding, gas assist injection molding, and foam molding (including a method of injecting a supercritical fluid) in order to satisfy characteristics required for products. , Insert molding, in-mold coating molding, heat-insulating 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.

  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.

  The resin composition of the present invention contains a plate-like inorganic filler having a specific particle size in a specific ratio, so that it has excellent metal wear resistance, particularly wear resistance of molding machine screws and molds, and has high strength and high dimensional accuracy. It is possible to provide a flame retardant resin composition that has flame retardancy and is suitable for molded parts of office equipment components, and is particularly effective in reducing production costs because of its low metal wear. The industrial effect is exceptional.

[1-A] is a side view showing the shape of a molding machine screw used in Examples. [1-B] is a side view showing the shape of a check valve (check ring) indicated by reference numeral 32 in [1-A]. [1-C] is a front view showing the shape of the check ring indicated by reference numeral 32 of [1-A]. [1-D] is a side view showing the shape of the seal ring indicated by reference numeral 33 of [1-A]. [1-E] is a front view showing the shape of the seal ring indicated by reference numeral 33 of [1-A]. [2-A] is a front view showing the shape of a plate-shaped molded product for die wear evaluation used in Examples. The pin portion arranged in the vicinity of the gate forms a conical recess. [2-B] is a side view showing the shape of a plate-shaped molded product for die wear evaluation used in the examples. [2-C] is a bottom view showing the shape of a plate-shaped molded product for die wear evaluation used in Examples. It is a front view which shows the shape of the pin for die wear evaluation used in the Example. The conical portion at the tip is exposed on the mold cavity surface and comes into contact with the molten resin.

  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.

  The present invention will be further described below with reference to examples, but the present invention is not limited thereto. The following items were evaluated.

(I) Molding machine check valve wear resistance An injection molding machine ULTRA220T (screw diameter: 40 mmφ, screw specification, corrosion and wear resistance II) manufactured by Sumitomo Heavy Industries, Ltd., cylinder temperature 260 ° C, mold temperature 60 ° C, Mold shape ASTM Type I dumbbell (width 19 mm x length 165 mm x thickness 3.2 mm), filling time 0.8 seconds, filling peak pressure 120 MPa, holding pressure 80 MPa, holding pressure 5 seconds, cooling 15 seconds, continuous molding 1000 shots Then, the state of the check ring and the touch surface of the seal ring at the tip of the molding machine screw shown in FIG. 1 (1-A, reference numeral 37) was visually determined. Evaluation was performed as follows.
◎: No particular change ○: The touch surface is slightly rough but there is no major damage △: The entire touch surface is pear-like but no major damage ×: The whole touch surface is changed to pear-like and large damage

(Ii) Mold pin gate wear resistance A disk-shaped molded product (diameter 20 mm, thickness 3.5 mm) in which a pin gate having a tip diameter of 0.5 mmφ is arranged by using an injection molding machine NEX50 manufactured by Nissei Plastic Industry Co., Ltd. The pin gate is set to a temperature of 50 ° C., set to a cylinder temperature such that the filling time is 0.5 seconds, and the filling peak pressure is 180 MPa, and 5000 shots are continuously formed at a holding pressure of 100 MPa, a holding pressure time of 2 seconds, and cooling of 15 seconds. The tip diameter was measured and the amount of shaving (μm) was determined. In addition, as for the steel material of the pin gate, three types of electroforming (standard type), high-speed steel (SKH51), and carbide (V40) manufactured by MISUMI Corporation were used. In addition, the following reference | standard was set for every pin gate steel material as a determination reference | standard in a present Example, and it was considered that it was favorable if it was below this reference | standard.
(Evaluation criteria)
Electroforming (standard type): 100μm
High-speed steel (SKH51): 50 μm
Carbide (V40): 10 μm

(Iii) Flexural modulus The flexural modulus was measured according to ISO178. The shape of the test piece was 80 mm long × 10 mm wide × 4 mm thick.

(Iv) Molding Shrinkage A square plate having a width of 50 mm, a length of 100 mm and a thickness of 4 mm was molded by injection molding under the following conditions, and left for 24 hours in an atmosphere of 23 ° C. and 50% RH. The molding shrinkage was calculated by measuring with a machine (manufactured by Mitutoyo Corporation). The square plate is formed using a mold cavity having a film gate having a width of 50 mm and a thickness of 1.5 mm at one end in the length direction. Therefore, the length direction is the flow direction, and the width direction is a direction perpendicular to the flow direction. As an anisotropy index, (flow direction) / (perpendicular direction) was obtained, and the following determination was made regarding anisotropy based on this numerical value.
◎: 1.00 to 0.70 No anisotropy Particularly good ○: Less than 0.70 0.50 or more Almost no anisotropy Good ×: Less than 0.50 Anisotropy large Unsuitable due to warpage, etc. The molding conditions are as follows. That is, injection molding machine: Toshiba Machine Industry Co., Ltd. EC-160Nii, cylinder temperature: 260 ° C., mold temperature: 70 ° C., filling time: 0.8 seconds, holding pressure: 80 MPa, holding pressure time: 10 seconds, And the cooling time was 30 seconds. Under such conditions, a good molded product was obtained. Furthermore, the square plate for dimensional evaluation was formed into 10 shots continuously after changing 15 shots into purge shots under the above conditions, and five samples were arbitrarily extracted from the molded products. The average value of these samples was taken as the mold shrinkage.

(V) Mold core wear resistance Using an injection molding machine EC-160Nii manufactured by Toshiba Machine Industry Co., Ltd., and a horizontal distance of 15 mm from the gate to the apex of the cone on a square plate of width 50 mm × length 100 mm × thickness 4 mm The wear state of the conical part after continuous molding of 10,000 shots at a cylinder temperature of 260 ° C. and a mold temperature of 60 ° C. using a die having a conical insert (material AISI standard P21) having a diameter of 10 mmφ at a distance. Judgment was made visually. The evaluation was performed as follows.
○: No change ×: Change

[Examples 1 to 16, Comparative Examples 1 to 8]
Of the components listed in Tables 1 and 2, A component, C component, E component and other components, excluding inorganic fillers (B component and D component), are mixed in a V-type blender to obtain a mixture. Created. Using a bent type twin screw extruder with a screw diameter of 30 mm [Nippon Steel Works TEX-30XSST], the mixture mixed in a V-type blender is fed from the first input port at the end, and an inorganic filler (component B) And D component) from the second supply port in the middle of the cylinder using a side feeder and supplying a predetermined ratio using a measuring instrument, using a vacuum pump at a cylinder temperature of 270 ° C. under a vacuum of 3 kPa. It was melt extruded and pelletized. However, when the C component is C-1, a liquid injection device (HYM-JS-08, manufactured by Fuji Techno Industry Co., Ltd.) is used while being heated to 80 ° C. (first supply port and second supply port) To the extruder at a predetermined ratio. The obtained pellets were dried with a hot air circulating dryer at 100 ° C. for 6 hours. Unless otherwise specified in the description of the evaluation items, the cylinder temperature was measured with an injection molding machine [EC160Nii manufactured by Toshiba Machine Industries Co., Ltd.]. Test pieces for evaluation were prepared at 260 ° C. and a mold temperature of 70 ° C., and the evaluation was performed by the above evaluation method. The results are shown in Tables 1 and 2.

In addition, the following were used as a raw material.
(A component)
A-1: Aromatic polycarbonate resin [Aromatic polycarbonate resin powder having a viscosity average molecular weight of 22,500 made by a conventional method from bisphenol A and phosgene] (“Panlite L-1225WP” manufactured by Teijin Chemicals Ltd. (trade name) ))
A-2-1: ABS resin [standard polystyrene equivalent weight average molecular weight by GPC measurement: 60000, butadiene content: 58% by weight] (“CHT” (trade name) manufactured by Daiichi Koryo Co., Ltd.)
A-2-2: Acrylonitrile-styrene copolymer [weight average molecular weight in terms of standard polystyrene by GPC: 95000, acrylonitrile content: 28.5 wt%, styrene content: 71.5 wt%] (first wool “HF5670” (trade name)
(B component)
B-1: Mascobite mica having an average particle size of 35 μm pulverized by a dry pulverization method (Kinsei Matec Co., Ltd .: KDM200C (trade name))
B-2: Mascobite mica having an average particle size of 35 μm pulverized by a wet pulverization method (KWM200 (trade name) manufactured by Kinsei Matec Co., Ltd.)
B-3: Mascobite mica (MC-80W (trade name) manufactured by Hayashi Kasei Co., Ltd.) having an average particle size of 90 μm pulverized by a wet pulverization method
B-4: Talc with an average particle size of 15 μm, Hunter whiteness (JIS M8016) of 90.2%, pH = 9.8 (Katsumiyama Mining Co., Ltd .: Victorite SG-A (trade name))
(Other than B component)
B-5: Mascobite mica having an average particle size of 250 μm pulverized by a dry pulverization method (MC-40 (trade name) manufactured by Hayashi Kasei Co., Ltd.)
B-6: Mascobite mica having an average particle size of 120 μm pulverized by a dry pulverization method (manufactured by Kinsei Matec Co., Ltd .: KDM80 (trade name))
(C component)
C-1: Phosphate ester mainly composed of bisphenol A bis (diphenyl phosphate) (manufactured by Daihachi Chemical Industry Co., Ltd .: CR-741 (trade name))
C-2: Resorcinol bis (dixylenyl phosphate) (manufactured by Daihachi Chemical Industry Co., Ltd .: PX200)
(D component)
D-1: Fiber diameter: 13 μm, cut length: 3 mm, aminosilane treatment-epoxy / urethane-based bundling, treatment agent adhesion amount: about 1.0%, bulk density: 0.80 g / cm ³ glass fiber (Nitto Boseki ( Co., Ltd .: 3PE937 (trade name))
D-2: Carbon fiber (HTA-C6-UA L1 (trade name) manufactured by Toho Tenax Co., Ltd.)
(E component)
E-1: Polytetrafluoroethylene having fibril forming ability (manufactured by Daikin Industries, Ltd .: Polyflon MPAFA500 (trade name))
E-2: polytetrafluoroethylene-based mixture. A mixture of polytetrafluoroethylene acrylic copolymer produced by an emulsion polymerization method (polytetrafluoroethylene content 50 wt%, potassium metal ions 16 ppm or more) (Daikin Industries, Ltd .: A3700 (trade name))
(Other ingredients)
F-1: Ester compound of ethylene glycol and aliphatic carboxylic acid (mainly montanic acid) (WAX-E powder (trade name) manufactured by Clariant Japan Co., Ltd.)
F-2: ester compound of dipentaerythritol adipate and aliphatic carboxylic acid (stearic acid as a main component) (EW-200 (trade name) manufactured by Riken Vitamin Co., Ltd.)
F-3: Carbon black master (carbon black 40 wt%, PS resin 60 wt%) (ROYALBLACK904S (trade name) manufactured by Koshigaya Kasei Co., Ltd.)

  As is apparent from the above table, the resin composition of the present invention contains a specific particle size or a plate-like inorganic filler obtained by a specific pulverization method in a specific ratio, thereby allowing metal wear, particularly around the molding machine screw and A resin composition suitable for office equipment component molded articles having excellent wear resistance of the mold and having high strength, high dimensional accuracy, and flame retardancy comparable to conventional products was obtained. Moreover, by using this resin composition, wear of a heating cylinder, a screw flight part, etc. of a molding machine was also reduced.

31 A tip tip provided at the tip of the molding machine screw 32 A check ring provided at the tip of the molding machine screw 33 A seal ring provided at the tip of the molding machine screw 34 A molding machine screw shaft 35 A molding machine screw flight 36 A claw for rotating the check ring 37 Check ring and seal ring seal surface 41 Check ring 42 Check ring seal surface 51 Seal ring 52 Seal ring seal surface 1 Plate-shaped product for mold wear evaluation 2 Conical recess 3 formed by pins 3 Gate (Width 4mm, thickness 2mm)
4 Length of plate-shaped molded product for die wear evaluation (100mm)
5 pin distance from the gate (10mm)
6 Diameter of conical recess formed by pins (pin diameter) (10 mm)
7 Center line (The center of the pin is on the center line of the molded product)
8 Depth of conical recess formed by pins (pin height) (3 mm)
9 Thickness of plate-shaped product for die wear evaluation (4mm)
10 Width of plate-shaped product for die wear evaluation (50mm)
11 Pin diameter (10mm)
12 Pin conical part (mold cavity surface exposed part) height (3mm)

Claims (9)

  (A) 100 parts by weight of thermoplastic resin (component A) (B) 10 to 150 parts by weight of a plate-like inorganic filler (component B) having an average particle size of 100 μm or less, (C) flame retardant (component C) A resin composition containing 0 to 30 parts by weight, (D) 0 to 30 parts by weight of a filler (D component) other than the B component, and (E) a fluorine-containing anti-dripping agent (E component) 0 to 5 parts by weight.   The resin composition according to claim 1, wherein the component A is at least one thermoplastic resin selected from the group consisting of an aromatic polycarbonate-based resin (component A-1) and a styrene-based resin (component A-2).   The resin composition according to claim 1, wherein the component B is mica and / or talc.   The resin composition according to claim 3, wherein the component B is mica pulverized by a wet pulverization method.   The resin composition according to any one of claims 1 to 4, wherein the component C is an organophosphate compound.   The resin composition according to any one of claims 1 to 5, wherein the component D is at least one filler selected from the group consisting of wollastonite, glass fiber, and carbon fiber.   The resin composition according to any one of claims 1 to 6, wherein the E component is a fluorine-containing dripping inhibitor having fibril forming ability.   The molded article which consists of a resin composition of any one of Claims 1-7.   The molded article according to claim 8, wherein the molded article is a mechanical part of an office machine, a household appliance, or an electric / electronic device.

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